Merge branch 'issue/master/8797_puppetlabs-functions_merge'

Closes pull request #12

Reviewed-by: Jeff McCune

Verified all spec tests pass using rspec **/*_spec.rb

* issue/master/8797_puppetlabs-functions_merge: (164 commits)
  * Moved kwalify to puppetlabs-kwalify project * Re-arranged tests in line with puppetlabs-stdlib
  Prep for stdlib merge * Renamed load_yaml & load_json to parseyaml & parsejson * Renamed is_valid_* functions and remove the 'valid_'
  Fix some ruby 1.9.2 issues.
  (#3) Provide documentation for remaining functions.
  (#3) Apply missing documentation to more functions.
  Remove rand.
  Some improvements to values_at tests.
  (#1) provide some more detailed tests for a number of functions.
  Removed date stub since this functinality is available in strftime anyway.
  (#2) fix is_string finally so it also makes sure numbers return false.
  (#2) unstub is_valid_domain_name
  Added doc strings for first five functions
  Removed join_with_prefix.
  (#2) unstub is_valid_mac_address.
  Allow sort for strings.
  Count functionality overlaps with size - so removing it.
  Removed crontab functions instead of unstubbing them.
  Removed load_variables. load_yaml is sufficient to solve this problem on its own.
  Remove is_valid_netmask instead of unstubbing. Doesn't seem like a sensible function on its own.
  (#2) unstub is_numeric function.
  ...

47 files changed, 1865 insertions, 0 deletions

diff --git a/lib/puppet/parser/functions/abs.rb b/lib/puppet/parser/functions/abs.rb
new file mode 100644
index 0000000..ade5462
--- /dev/null
+++ b/lib/puppet/parser/functions/abs.rb
@@ -0,0 +1,36 @@
+#
+# abs.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:abs, :type => :rvalue, :doc => <<-EOS
+    Returns the absolute value of a number, for example -34.56 becomes 
+    34.56. Takes a single integer and float value as an argument.
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "abs(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    value = arguments[0]
+
+    # Numbers in Puppet are often string-encoded which is troublesome ...
+    if value.is_a?(String)
+      if value.match(/^-?(?:\d+)(?:\.\d+){1}$/)
+        value = value.to_f
+      elsif value.match(/^-?\d+$/)
+        value = value.to_i
+      else
+        raise(Puppet::ParseError, 'abs(): Requires float or ' +
+          'integer to work with')
+      end
+    end
+
+    # We have numeric value to handle ...
+    result = value.abs
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/bool2num.rb b/lib/puppet/parser/functions/bool2num.rb
new file mode 100644
index 0000000..9a07a8a
--- /dev/null
+++ b/lib/puppet/parser/functions/bool2num.rb
@@ -0,0 +1,49 @@
+#
+# bool2num.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:bool2num, :type => :rvalue, :doc => <<-EOS
+    Converts a boolean to a number. Converts the values:
+      false, f, 0, n, and no to 0
+      true, t, 1, y, and yes to 1
+    Requires a single boolean or string as an input.
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "bool2num(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    value = arguments[0]
+    klass = value.class
+
+    # We can have either true or false, or string which resembles boolean ...
+    unless [FalseClass, TrueClass, String].include?(klass)
+      raise(Puppet::ParseError, 'bool2num(): Requires either ' +
+        'boolean or string to work with')
+    end
+
+    if value.is_a?(String)
+      # We consider all the yes, no, y, n and so on too ...
+      value = case value
+        #
+        # This is how undef looks like in Puppet ...
+        # We yield 0 (or false if you wish) in this case.
+        #
+        when /^$/, '' then false # Empty string will be false ...
+        when /^(1|t|y|true|yes)$/  then true
+        when /^(0|f|n|false|no)$/  then false
+        when /^(undef|undefined)$/ then false # This is not likely to happen ...
+        else
+          raise(Puppet::ParseError, 'bool2num(): Unknown type of boolean given')
+      end
+    end
+
+    # We have real boolean values as well ...
+    result = value ? 1 : 0
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/capitalize.rb b/lib/puppet/parser/functions/capitalize.rb
new file mode 100644
index 0000000..640d00b
--- /dev/null
+++ b/lib/puppet/parser/functions/capitalize.rb
@@ -0,0 +1,34 @@
+#
+#  capitalize.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:capitalize, :type => :rvalue, :doc => <<-EOS
+    Capitalizes the first letter of a string or array of strings.
+    Requires either a single string or an array as an input.
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "capitalize(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    value = arguments[0]
+    klass = value.class
+
+    unless [Array, String].include?(klass)
+      raise(Puppet::ParseError, 'capitalize(): Requires either ' +
+        'array or string to work with')
+    end
+
+    if value.is_a?(Array)
+      # Numbers in Puppet are often string-encoded which is troublesome ...
+      result = value.collect { |i| i.is_a?(String) ? i.capitalize : i }
+    else
+      result = value.capitalize
+    end
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/chomp.rb b/lib/puppet/parser/functions/chomp.rb
new file mode 100644
index 0000000..c99d139
--- /dev/null
+++ b/lib/puppet/parser/functions/chomp.rb
@@ -0,0 +1,35 @@
+#
+#  chomp.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:chomp, :type => :rvalue, :doc => <<-'EOS'
+    Removes the record separator from the end of a string or an array of 
+    strings, for example `hello\n` becomes `hello`.
+    Requires a single string or array as an input.
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "chomp(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    value = arguments[0]
+    klass = value.class
+
+    unless [Array, String].include?(klass)
+      raise(Puppet::ParseError, 'chomp(): Requires either ' +
+        'array or string to work with')
+    end
+
+    if value.is_a?(Array)
+      # Numbers in Puppet are often string-encoded which is troublesome ...
+      result = value.collect { |i| i.is_a?(String) ? i.chomp : i }
+    else
+      result = value.chomp
+    end
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/chop.rb b/lib/puppet/parser/functions/chop.rb
new file mode 100644
index 0000000..636b990
--- /dev/null
+++ b/lib/puppet/parser/functions/chop.rb
@@ -0,0 +1,37 @@
+#
+#  chop.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:chop, :type => :rvalue, :doc => <<-'EOS'
+    Returns a new string with the last character removed. If the string ends 
+    with `\r\n`, both characters are removed. Applying chop to an empty 
+    string returns an empty string. If you wish to merely remove record 
+    separators then you should use the `chomp` function.
+    Requires a string or array of strings as input.
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "chop(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    value = arguments[0]
+    klass = value.class
+
+    unless [Array, String].include?(klass)
+      raise(Puppet::ParseError, 'chop(): Requires either an ' +
+        'array or string to work with')
+    end
+
+    if value.is_a?(Array)
+      # Numbers in Puppet are often string-encoded which is troublesome ...
+      result = value.collect { |i| i.is_a?(String) ? i.chop : i }
+    else
+      result = value.chop
+    end
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/delete.rb b/lib/puppet/parser/functions/delete.rb
new file mode 100644
index 0000000..ab8f75b
--- /dev/null
+++ b/lib/puppet/parser/functions/delete.rb
@@ -0,0 +1,34 @@
+#
+# delete.rb
+#
+
+# TODO(Krzysztof Wilczynski): We need to add support for regular expression ...
+# TODO(Krzysztof Wilczynski): Support for strings and hashes too ...
+
+module Puppet::Parser::Functions
+  newfunction(:delete, :type => :rvalue, :doc => <<-EOS
+Deletes a selected element from an array.
+
+*Examples:*
+
+    delete(['a','b','c'], 'b')
+
+Would return: ['a','c']
+    EOS
+  ) do |arguments|
+
+    if (arguments.size != 2) then
+      raise(Puppet::ParseError, "delete(): Wrong number of arguments "+
+        "given #{arguments.size} for 2")
+    end
+
+    a = arguments[0]
+    item = arguments[1]
+
+    a.delete(item)
+    a
+
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/delete_at.rb b/lib/puppet/parser/functions/delete_at.rb
new file mode 100644
index 0000000..3eb4b53
--- /dev/null
+++ b/lib/puppet/parser/functions/delete_at.rb
@@ -0,0 +1,49 @@
+#
+# delete_at.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:delete_at, :type => :rvalue, :doc => <<-EOS
+Deletes a determined indexed value from an array.
+
+*Examples:*
+
+    delete_at(['a','b','c'], 1)
+
+Would return: ['a','c']
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "delete_at(): Wrong number of arguments " +
+      "given (#{arguments.size} for 2)") if arguments.size < 2
+
+    array = arguments[0]
+
+    unless array.is_a?(Array)
+      raise(Puppet::ParseError, 'delete_at(): Requires array to work with')
+    end
+
+    index = arguments[1]
+
+    if index.is_a?(String) and not index.match(/^\d+$/)
+      raise(Puppet::ParseError, 'delete_at(): You must provide ' +
+        'non-negative numeric index')
+    end
+
+    result = array.clone
+
+    # Numbers in Puppet are often string-encoded which is troublesome ...
+    index = index.to_i
+
+    if index > result.size - 1 # First element is at index 0 is it not?
+      raise(Puppet::ParseError, 'delete_at(): Given index ' +
+        'exceeds size of array given')
+    end
+
+    result.delete_at(index) # We ignore the element that got deleted ...
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/downcase.rb b/lib/puppet/parser/functions/downcase.rb
new file mode 100644
index 0000000..4066d21
--- /dev/null
+++ b/lib/puppet/parser/functions/downcase.rb
@@ -0,0 +1,33 @@
+#
+#  downcase.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:downcase, :type => :rvalue, :doc => <<-EOS
+Converts the case of a string or all strings in an array to lower case.
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "downcase(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    value = arguments[0]
+    klass = value.class
+
+    unless [Array, String].include?(klass)
+      raise(Puppet::ParseError, 'downcase(): Requires either ' +
+        'array or string to work with')
+    end
+
+    if value.is_a?(Array)
+      # Numbers in Puppet are often string-encoded which is troublesome ...
+      result = value.collect { |i| i.is_a?(String) ? i.downcase : i }
+    else
+      result = value.downcase
+    end
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/empty.rb b/lib/puppet/parser/functions/empty.rb
new file mode 100644
index 0000000..80ebb86
--- /dev/null
+++ b/lib/puppet/parser/functions/empty.rb
@@ -0,0 +1,28 @@
+#
+# empty.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:empty, :type => :rvalue, :doc => <<-EOS
+Returns true if the variable is empty.
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "empty(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    value = arguments[0]
+    klass = value.class
+
+    unless [Array, Hash, String].include?(klass)
+      raise(Puppet::ParseError, 'empty(): Requires either ' +
+        'array, hash or string to work with')
+    end
+
+    result = value.empty?
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/flatten.rb b/lib/puppet/parser/functions/flatten.rb
new file mode 100644
index 0000000..781da78
--- /dev/null
+++ b/lib/puppet/parser/functions/flatten.rb
@@ -0,0 +1,33 @@
+#
+# flatten.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:flatten, :type => :rvalue, :doc => <<-EOS
+This function flattens any deeply nested arrays and returns a single flat array
+as a result.
+
+*Examples:*
+
+    flatten(['a', ['b', ['c']]])
+
+Would return: ['a','b','c']
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "flatten(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    array = arguments[0]
+
+    unless array.is_a?(Array)
+      raise(Puppet::ParseError, 'flatten(): Requires array to work with')
+    end
+
+    result = array.flatten
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/grep.rb b/lib/puppet/parser/functions/grep.rb
new file mode 100644
index 0000000..ceba9ec
--- /dev/null
+++ b/lib/puppet/parser/functions/grep.rb
@@ -0,0 +1,33 @@
+#
+# grep.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:grep, :type => :rvalue, :doc => <<-EOS
+This function searches through an array and returns any elements that match
+the provided regular expression.
+
+*Examples:*
+
+    grep(['aaa','bbb','ccc','aaaddd'], 'aaa')
+
+Would return:
+
+    ['aaa','aaaddd']
+    EOS
+  ) do |arguments|
+
+    if (arguments.size != 2) then
+      raise(Puppet::ParseError, "grep(): Wrong number of arguments "+
+        "given #{arguments.size} for 2")
+    end
+
+    a = arguments[0]
+    pattern = Regexp.new(arguments[1])
+
+    a.grep(pattern)
+
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/hash.rb b/lib/puppet/parser/functions/hash.rb
new file mode 100644
index 0000000..453ba1e
--- /dev/null
+++ b/lib/puppet/parser/functions/hash.rb
@@ -0,0 +1,41 @@
+#
+# hash.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:hash, :type => :rvalue, :doc => <<-EOS
+This function converts and array into a hash.
+
+*Examples:*
+
+    hash(['a',1,'b',2,'c',3])
+
+Would return: {'a'=>1,'b'=>2,'c'=>3}
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "hash(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    array = arguments[0]
+
+    unless array.is_a?(Array)
+      raise(Puppet::ParseError, 'hash(): Requires array to work with')
+    end
+
+    result = {}
+
+    begin
+      # This is to make it compatible with older version of Ruby ...
+      array  = array.flatten
+      result = Hash[*array]
+    rescue Exception
+      raise(Puppet::ParseError, 'hash(): Unable to compute ' +
+        'hash from array given')
+    end
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/is_array.rb b/lib/puppet/parser/functions/is_array.rb
new file mode 100644
index 0000000..b39e184
--- /dev/null
+++ b/lib/puppet/parser/functions/is_array.rb
@@ -0,0 +1,22 @@
+#
+# is_array.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:is_array, :type => :rvalue, :doc => <<-EOS
+Returns true if the variable passed to this function is an array.
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "is_array(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    type = arguments[0]
+
+    result = type.is_a?(Array)
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/is_domain_name.rb b/lib/puppet/parser/functions/is_domain_name.rb
new file mode 100644
index 0000000..4e92939
--- /dev/null
+++ b/lib/puppet/parser/functions/is_domain_name.rb
@@ -0,0 +1,27 @@
+#
+# is_domain_name.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:is_domain_name, :type => :rvalue, :doc => <<-EOS
+Returns true if the string passed to this function is a valid IP address. Support for IPv4 and IPv6 address types is included.
+    EOS
+  ) do |arguments|
+
+    if (arguments.size != 1) then
+      raise(Puppet::ParseError, "is_domain_name(): Wrong number of arguments "+
+        "given #{arguments.size} for 1")
+    end
+
+    domain = arguments[0]
+
+    if domain =~ /^(([a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)*([A-Za-z0-9][A-Za-z0-9\-]*[A-Za-z0-9])\.?$/ then
+      return true
+    else
+      return false
+    end
+
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/is_float.rb b/lib/puppet/parser/functions/is_float.rb
new file mode 100644
index 0000000..2fc05ba
--- /dev/null
+++ b/lib/puppet/parser/functions/is_float.rb
@@ -0,0 +1,27 @@
+#
+# is_float.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:is_float, :type => :rvalue, :doc => <<-EOS
+Returns true if the variable passed to this function is a float.
+    EOS
+  ) do |arguments|
+
+    if (arguments.size != 1) then
+      raise(Puppet::ParseError, "is_float(): Wrong number of arguments "+
+        "given #{arguments.size} for 1")
+    end
+
+    value = arguments[0]
+
+    if value != value.to_f.to_s then
+      return false
+    else
+      return true
+    end
+
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/is_hash.rb b/lib/puppet/parser/functions/is_hash.rb
new file mode 100644
index 0000000..ad907f0
--- /dev/null
+++ b/lib/puppet/parser/functions/is_hash.rb
@@ -0,0 +1,22 @@
+#
+# is_hash.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:is_hash, :type => :rvalue, :doc => <<-EOS
+Returns true if the variable passed to this function is a hash.
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "is_hash(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size != 1
+
+    type = arguments[0]
+
+    result = type.is_a?(Hash)
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/is_integer.rb b/lib/puppet/parser/functions/is_integer.rb
new file mode 100644
index 0000000..8ee34f6
--- /dev/null
+++ b/lib/puppet/parser/functions/is_integer.rb
@@ -0,0 +1,27 @@
+#
+# is_integer.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:is_integer, :type => :rvalue, :doc => <<-EOS
+Returns true if the variable returned to this string is an integer.
+    EOS
+  ) do |arguments|
+
+    if (arguments.size != 1) then
+      raise(Puppet::ParseError, "is_integer(): Wrong number of arguments "+
+        "given #{arguments.size} for 1")
+    end
+
+    value = arguments[0]
+
+    if value != value.to_i.to_s then
+      return false
+    else
+      return true
+    end
+
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/is_ip_address.rb b/lib/puppet/parser/functions/is_ip_address.rb
new file mode 100644
index 0000000..b4a9a15
--- /dev/null
+++ b/lib/puppet/parser/functions/is_ip_address.rb
@@ -0,0 +1,32 @@
+#
+# is_ip_address.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:is_ip_address, :type => :rvalue, :doc => <<-EOS
+Returns true if the string passed to this function is a valid IP address.
+    EOS
+  ) do |arguments|
+
+    require 'ipaddr'
+
+    if (arguments.size != 1) then
+      raise(Puppet::ParseError, "is_ip_address(): Wrong number of arguments "+
+        "given #{arguments.size} for 1")
+    end
+
+    begin 
+      ip = IPAddr.new(arguments[0])
+    rescue ArgumentError
+      return false
+    end
+
+    if ip.ipv4? or ip.ipv6? then
+      return true
+    else
+      return false
+    end
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/is_mac_address.rb b/lib/puppet/parser/functions/is_mac_address.rb
new file mode 100644
index 0000000..1b3088a
--- /dev/null
+++ b/lib/puppet/parser/functions/is_mac_address.rb
@@ -0,0 +1,27 @@
+#
+# is_mac_address.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:is_mac_address, :type => :rvalue, :doc => <<-EOS
+Returns true if the string passed to this function is a valid mac address.
+    EOS
+  ) do |arguments|
+
+    if (arguments.size != 1) then
+      raise(Puppet::ParseError, "is_mac_address(): Wrong number of arguments "+
+        "given #{arguments.size} for 1")
+    end
+
+    mac = arguments[0]
+
+    if /^[a-fA-F0-9]{1,2}:[a-fA-F0-9]{1,2}:[a-fA-F0-9]{1,2}:[a-fA-F0-9]{1,2}:[a-fA-F0-9]{1,2}:[a-fA-F0-9]{1,2}$/.match(mac) then
+      return true
+    else
+      return false
+    end
+
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/is_numeric.rb b/lib/puppet/parser/functions/is_numeric.rb
new file mode 100644
index 0000000..ce13ece
--- /dev/null
+++ b/lib/puppet/parser/functions/is_numeric.rb
@@ -0,0 +1,27 @@
+#
+# is_numeric.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:is_numeric, :type => :rvalue, :doc => <<-EOS
+Returns true if the variable passed to this function is a number.
+    EOS
+  ) do |arguments|
+
+    if (arguments.size != 1) then
+      raise(Puppet::ParseError, "is_numeric(): Wrong number of arguments "+
+        "given #{arguments.size} for 1")
+    end
+
+    value = arguments[0]
+
+    if value == value.to_f.to_s or value == value.to_i.to_s then
+      return true
+    else
+      return false
+    end
+
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/is_string.rb b/lib/puppet/parser/functions/is_string.rb
new file mode 100644
index 0000000..f5bef04
--- /dev/null
+++ b/lib/puppet/parser/functions/is_string.rb
@@ -0,0 +1,26 @@
+#
+# is_string.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:is_string, :type => :rvalue, :doc => <<-EOS
+Returns true if the variable passed to this function is a string.
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "is_string(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    type = arguments[0]
+
+    result = type.is_a?(String)
+
+    if result and (type == type.to_f.to_s or type == type.to_i.to_s) then
+      return false
+    end
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/join.rb b/lib/puppet/parser/functions/join.rb
new file mode 100644
index 0000000..005a46e
--- /dev/null
+++ b/lib/puppet/parser/functions/join.rb
@@ -0,0 +1,41 @@
+#
+# join.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:join, :type => :rvalue, :doc => <<-EOS
+This function joins an array into a string using a seperator.
+
+*Examples:*
+
+    join(['a','b','c'], ",")
+
+Would result in: "a,b,c"
+    EOS
+  ) do |arguments|
+
+    # Technically we support two arguments but only first is mandatory ...
+    raise(Puppet::ParseError, "join(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    array = arguments[0]
+
+    unless array.is_a?(Array)
+      raise(Puppet::ParseError, 'join(): Requires array to work with')
+    end
+
+    suffix = arguments[1] if arguments[1]
+
+    if suffix
+      unless suffix.is_a?(String)
+        raise(Puppet::ParseError, 'join(): Requires string to work with')
+      end
+    end
+
+    result = suffix ? array.join(suffix) : array.join
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/keys.rb b/lib/puppet/parser/functions/keys.rb
new file mode 100644
index 0000000..f0d13b6
--- /dev/null
+++ b/lib/puppet/parser/functions/keys.rb
@@ -0,0 +1,26 @@
+#
+# keys.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:keys, :type => :rvalue, :doc => <<-EOS
+Returns the keys of a hash as an array.
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "keys(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    hash = arguments[0]
+
+    unless hash.is_a?(Hash)
+      raise(Puppet::ParseError, 'keys(): Requires hash to work with')
+    end
+
+    result = hash.keys
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/lstrip.rb b/lib/puppet/parser/functions/lstrip.rb
new file mode 100644
index 0000000..3a64de3
--- /dev/null
+++ b/lib/puppet/parser/functions/lstrip.rb
@@ -0,0 +1,33 @@
+#
+#  lstrip.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:lstrip, :type => :rvalue, :doc => <<-EOS
+Strips leading spaces to the left of a string.
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "lstrip(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    value = arguments[0]
+    klass = value.class
+
+    unless [Array, String].include?(klass)
+      raise(Puppet::ParseError, 'lstrip(): Requires either ' +
+        'array or string to work with')
+    end
+
+    if value.is_a?(Array)
+      # Numbers in Puppet are often string-encoded which is troublesome ...
+      result = value.collect { |i| i.is_a?(String) ? i.lstrip : i }
+    else
+      result = value.lstrip
+    end
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/member.rb b/lib/puppet/parser/functions/member.rb
new file mode 100644
index 0000000..43d76af
--- /dev/null
+++ b/lib/puppet/parser/functions/member.rb
@@ -0,0 +1,44 @@
+#
+# member.rb
+#
+
+# TODO(Krzysztof Wilczynski): We need to add support for regular expression ...
+# TODO(Krzysztof Wilczynski): Support for strings and hashes too ...
+
+module Puppet::Parser::Functions
+  newfunction(:member, :type => :rvalue, :doc => <<-EOS
+This function determines if a variable is a member of an array.
+
+*Examples:*
+
+    member(['a','b'], 'b')
+
+Would return: true
+
+    member(['a','b'], 'c')
+
+Would return: false
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "member(): Wrong number of arguments " +
+      "given (#{arguments.size} for 2)") if arguments.size < 2
+
+    array = arguments[0]
+
+    unless array.is_a?(Array)
+      raise(Puppet::ParseError, 'member(): Requires array to work with')
+    end
+
+    item = arguments[1]
+
+    raise(Puppet::ParseError, 'member(): You must provide item ' +
+      'to search for within array given') if item.empty?
+
+    result = array.include?(item)
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/num2bool.rb b/lib/puppet/parser/functions/num2bool.rb
new file mode 100644
index 0000000..874db22
--- /dev/null
+++ b/lib/puppet/parser/functions/num2bool.rb
@@ -0,0 +1,40 @@
+#
+# num2bool.rb
+#
+
+# TODO(Krzysztof Wilczynski): We probably need to approach numeric values differently ...
+
+module Puppet::Parser::Functions
+  newfunction(:num2bool, :type => :rvalue, :doc => <<-EOS
+This function converts a number into a true boolean. Zero becomes false. Numbers
+higher then 0 become true.
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "num2bool(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    number = arguments[0]
+
+    # Only numbers allowed ...
+    unless number.match(/^\-?\d+$/)
+      raise(Puppet::ParseError, 'num2bool(): Requires integer to work with')
+    end
+
+    result = case number
+      when /^0$/
+        false
+      when /^\-?\d+$/
+        # Numbers in Puppet are often string-encoded which is troublesome ...
+        number = number.to_i
+        # We yield true for any positive number and false otherwise ...
+        number > 0 ? true : false
+      else
+        raise(Puppet::ParseError, 'num2bool(): Unknown numeric format given')
+    end
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/parsejson.rb b/lib/puppet/parser/functions/parsejson.rb
new file mode 100644
index 0000000..cf3b12c
--- /dev/null
+++ b/lib/puppet/parser/functions/parsejson.rb
@@ -0,0 +1,26 @@
+#
+# parsejson.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:parsejson, :type => :rvalue, :doc => <<-EOS
+This function accepts JSON as a string and converts into the correct Puppet
+structure.
+    EOS
+  ) do |arguments|
+
+    if (arguments.size != 1) then
+      raise(Puppet::ParseError, "parsejson(): Wrong number of arguments "+
+        "given #{arguments.size} for 1")
+    end
+
+    json = arguments[0]
+    
+    require 'json'
+
+    JSON.load(json)
+
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/parseyaml.rb b/lib/puppet/parser/functions/parseyaml.rb
new file mode 100644
index 0000000..e8ac8a4
--- /dev/null
+++ b/lib/puppet/parser/functions/parseyaml.rb
@@ -0,0 +1,24 @@
+#
+# parseyaml.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:parseyaml, :type => :rvalue, :doc => <<-EOS
+This function accepts YAML as a string and converts it into the correct 
+Puppet structure.
+    EOS
+  ) do |arguments|
+
+    if (arguments.size != 1) then
+      raise(Puppet::ParseError, "parseyaml(): Wrong number of arguments "+
+        "given #{arguments.size} for 1")
+    end
+
+    require 'yaml'
+
+    YAML::load(arguments[0])
+
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/prefix.rb b/lib/puppet/parser/functions/prefix.rb
new file mode 100644
index 0000000..4593976
--- /dev/null
+++ b/lib/puppet/parser/functions/prefix.rb
@@ -0,0 +1,45 @@
+#
+# prefix.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:prefix, :type => :rvalue, :doc => <<-EOS
+This function applies a prefix to all elements in an array.
+
+*Examles:*
+
+    prefix(['a','b','c'], 'p')
+
+Will return: ['pa','pb','pc']
+    EOS
+  ) do |arguments|
+
+    # Technically we support two arguments but only first is mandatory ...
+    raise(Puppet::ParseError, "prefix(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    array = arguments[0]
+
+    unless array.is_a?(Array)
+      raise(Puppet::ParseError, 'prefix(): Requires array to work with')
+    end
+
+    prefix = arguments[1] if arguments[1]
+
+    if prefix
+      unless prefix.is_a?(String)
+        raise(Puppet::ParseError, 'prefix(): Requires string to work with')
+      end
+    end
+
+    # Turn everything into string same as join would do ...
+    result = array.collect do |i|
+      i = i.to_s
+      prefix ? prefix + i : i
+    end
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/range.rb b/lib/puppet/parser/functions/range.rb
new file mode 100644
index 0000000..6e85422
--- /dev/null
+++ b/lib/puppet/parser/functions/range.rb
@@ -0,0 +1,71 @@
+#
+# range.rb
+#
+
+# TODO(Krzysztof Wilczynski): We probably need to approach numeric values differently ...
+
+module Puppet::Parser::Functions
+  newfunction(:range, :type => :rvalue, :doc => <<-EOS
+When given range in the form of (start, stop) it will extrapolate a range as
+an array.
+
+*Examples:*
+
+    range("0", "9")
+
+Will return: [0,1,2,3,4,5,6,7,8,9]
+
+    range("a", "c")
+
+Will return: ["a","b","c"]
+    EOS
+  ) do |arguments|
+
+    # We support more than one argument but at least one is mandatory ...
+    raise(Puppet::ParseError, "range(): Wrong number of " +
+      "arguments given (#{arguments.size} for 1)") if arguments.size < 1
+
+    if arguments.size > 1
+      start = arguments[0]
+      stop  = arguments[1]
+
+      type = '..' # We select simplest type for Range available in Ruby ...
+
+    elsif arguments.size > 0
+      value = arguments[0]
+
+      if m = value.match(/^(\w+)(\.\.\.?|\-)(\w+)$/)
+        start = m[1]
+        stop  = m[3]
+
+        type = m[2]
+
+      elsif value.match(/^.+$/)
+        raise(Puppet::ParseError, 'range(): Unable to compute range ' +
+          'from the value given')
+      else
+        raise(Puppet::ParseError, 'range(): Unknown format of range given')
+      end
+    end
+
+      # Check whether we have integer value if so then make it so ...
+      if start.match(/^\d+$/)
+        start = start.to_i
+        stop  = stop.to_i
+      else
+        start = start.to_s
+        stop  = stop.to_s
+      end
+
+      range = case type
+        when /^(\.\.|\-)$/ then (start .. stop)
+        when /^(\.\.\.)$/  then (start ... stop) # Exclusive of last element ...
+      end
+
+      result = range.collect { |i| i } # Get them all ... Pokemon ...
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/reverse.rb b/lib/puppet/parser/functions/reverse.rb
new file mode 100644
index 0000000..fe04869
--- /dev/null
+++ b/lib/puppet/parser/functions/reverse.rb
@@ -0,0 +1,28 @@
+#
+# reverse.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:reverse, :type => :rvalue, :doc => <<-EOS
+Reverses the order of a string or array.
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "reverse(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    value = arguments[0]
+    klass = value.class
+
+    unless [Array, String].include?(klass)
+      raise(Puppet::ParseError, 'reverse(): Requires either ' +
+        'array or string to work with')
+    end
+
+    result = value.reverse
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/rstrip.rb b/lib/puppet/parser/functions/rstrip.rb
new file mode 100644
index 0000000..29b0998
--- /dev/null
+++ b/lib/puppet/parser/functions/rstrip.rb
@@ -0,0 +1,32 @@
+#
+#  rstrip.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:rstrip, :type => :rvalue, :doc => <<-EOS
+Strips leading spaces to the right of the string.
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "rstrip(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    value = arguments[0]
+    klass = value.class
+
+    unless [Array, String].include?(klass)
+      raise(Puppet::ParseError, 'rstrip(): Requires either ' +
+        'array or string to work with')
+    end
+
+    if value.is_a?(Array)
+      result = value.collect { |i| i.is_a?(String) ? i.rstrip : i }
+    else
+      result = value.rstrip
+    end
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/shuffle.rb b/lib/puppet/parser/functions/shuffle.rb
new file mode 100644
index 0000000..18134ab
--- /dev/null
+++ b/lib/puppet/parser/functions/shuffle.rb
@@ -0,0 +1,46 @@
+#
+# shuffle.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:shuffle, :type => :rvalue, :doc => <<-EOS
+Randomizes the order of a string or array elements.
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "shuffle(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    value = arguments[0]
+    klass = value.class
+
+    unless [Array, String].include?(klass)
+      raise(Puppet::ParseError, 'shuffle(): Requires either ' +
+        'array or string to work with')
+    end
+
+    result = value.clone
+
+    string = value.is_a?(String) ? true : false
+
+    # Check whether it makes sense to shuffle ...
+    return result if result.size <= 1
+
+    # We turn any string value into an array to be able to shuffle ...
+    result = string ? result.split('') : result
+
+    elements = result.size
+
+    # Simple implementation of Fisher–Yates in-place shuffle ...
+    elements.times do |i|
+      j = rand(elements - i) + i
+      result[j], result[i] = result[i], result[j]
+    end
+
+    result = string ? result.join : result
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/size.rb b/lib/puppet/parser/functions/size.rb
new file mode 100644
index 0000000..cc207e3
--- /dev/null
+++ b/lib/puppet/parser/functions/size.rb
@@ -0,0 +1,48 @@
+#
+# size.rb
+#
+
+# TODO(Krzysztof Wilczynski): Support for hashes would be nice too ...
+
+module Puppet::Parser::Functions
+  newfunction(:size, :type => :rvalue, :doc => <<-EOS
+Returns the number of elements in a string or array.
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "size(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    item = arguments[0]
+
+    if item.is_a?(String)
+
+      begin
+        #
+        # Check whether your item is a numeric value or not ...
+        # This will take care about positive and/or negative numbers
+        # for both integer and floating-point values ...
+        #
+        # Please note that Puppet has no notion of hexadecimal
+        # nor octal numbers for its DSL at this point in time ...
+        #
+        Float(item)
+
+        raise(Puppet::ParseError, 'size(): Requires either ' +
+          'string or array to work with')
+
+      rescue ArgumentError
+        result = item.size
+      end
+
+    elsif item.is_a?(Array)
+      result = item.size
+    else
+      raise(Puppet::ParseError, 'size(): Unknown type given')
+    end
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/sort.rb b/lib/puppet/parser/functions/sort.rb
new file mode 100644
index 0000000..cefbe54
--- /dev/null
+++ b/lib/puppet/parser/functions/sort.rb
@@ -0,0 +1,27 @@
+#
+# sort.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:sort, :type => :rvalue, :doc => <<-EOS
+Sorts strings and arrays lexically.
+    EOS
+  ) do |arguments|
+
+    if (arguments.size != 1) then
+      raise(Puppet::ParseError, "sort(): Wrong number of arguments "+
+        "given #{arguments.size} for 1")
+    end
+
+    value = arguments[0]
+
+    if value.is_a?(Array) then
+      value.sort
+    elsif value.is_a?(String) then
+      value.split("").sort.join("")
+    end
+
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/squeeze.rb b/lib/puppet/parser/functions/squeeze.rb
new file mode 100644
index 0000000..65c174a
--- /dev/null
+++ b/lib/puppet/parser/functions/squeeze.rb
@@ -0,0 +1,36 @@
+#
+# squeeze.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:squeeze, :type => :rvalue, :doc => <<-EOS
+Returns a new string where runs of the same character that occur in this set are replaced by a single character.
+    EOS
+  ) do |arguments|
+
+    if ((arguments.size != 2) and (arguments.size != 1)) then
+      raise(Puppet::ParseError, "squeeze(): Wrong number of arguments "+
+        "given #{arguments.size} for 2 or 1")
+    end
+
+    item = arguments[0]
+    squeezeval = arguments[1] 
+
+    if item.is_a?(Array) then  
+      if squeezeval then
+        item.collect { |i| i.squeeze(squeezeval) }
+      else
+        item.collect { |i| i.squeeze }
+      end
+    else
+      if squeezeval then
+        item.squeeze(squeezeval)
+      else
+        item.squeeze
+      end
+    end
+
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/str2bool.rb b/lib/puppet/parser/functions/str2bool.rb
new file mode 100644
index 0000000..c320da6
--- /dev/null
+++ b/lib/puppet/parser/functions/str2bool.rb
@@ -0,0 +1,41 @@
+#
+# str2bool.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:str2bool, :type => :rvalue, :doc => <<-EOS
+This converts a string to a boolean. This attempt to convert strings that 
+contain things like: y, 1, t, true to 'true' and strings that contain things
+like: 0, f, n, false, no to 'false'.
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "str2bool(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    string = arguments[0]
+
+    unless string.is_a?(String)
+      raise(Puppet::ParseError, 'str2bool(): Requires either ' +
+        'string to work with')
+    end
+
+    # We consider all the yes, no, y, n and so on too ...
+    result = case string
+      #
+      # This is how undef looks like in Puppet ...
+      # We yield false in this case.
+      #
+      when /^$/, '' then false # Empty string will be false ...
+      when /^(1|t|y|true|yes)$/  then true
+      when /^(0|f|n|false|no)$/  then false
+      when /^(undef|undefined)$/ then false # This is not likely to happen ...
+      else
+        raise(Puppet::ParseError, 'str2bool(): Unknown type of boolean given')
+    end
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/strftime.rb b/lib/puppet/parser/functions/strftime.rb
new file mode 100644
index 0000000..0b52ade
--- /dev/null
+++ b/lib/puppet/parser/functions/strftime.rb
@@ -0,0 +1,107 @@
+#
+# strftime.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:strftime, :type => :rvalue, :doc => <<-EOS
+This function returns formatted time.
+
+*Examples:*
+
+To return the time since epoch:
+
+    strftime("%s")
+
+To return the date:
+
+    strftime("%Y-%m-%d")
+
+*Format meaning:*
+
+    %a - The abbreviated weekday name (``Sun'')
+    %A - The  full  weekday  name (``Sunday'')
+    %b - The abbreviated month name (``Jan'')
+    %B - The  full  month  name (``January'')
+    %c - The preferred local date and time representation
+    %C - Century (20 in 2009)
+    %d - Day of the month (01..31)
+    %D - Date (%m/%d/%y)
+    %e - Day of the month, blank-padded ( 1..31)
+    %F - Equivalent to %Y-%m-%d (the ISO 8601 date format)
+    %h - Equivalent to %b
+    %H - Hour of the day, 24-hour clock (00..23)
+    %I - Hour of the day, 12-hour clock (01..12)
+    %j - Day of the year (001..366)
+    %k - hour, 24-hour clock, blank-padded ( 0..23)
+    %l - hour, 12-hour clock, blank-padded ( 0..12)
+    %L - Millisecond of the second (000..999)
+    %m - Month of the year (01..12)
+    %M - Minute of the hour (00..59)
+    %n - Newline (\n)
+    %N - Fractional seconds digits, default is 9 digits (nanosecond)
+            %3N  millisecond (3 digits)
+            %6N  microsecond (6 digits)
+            %9N  nanosecond (9 digits)
+    %p - Meridian indicator (``AM''  or  ``PM'')
+    %P - Meridian indicator (``am''  or  ``pm'')
+    %r - time, 12-hour (same as %I:%M:%S %p)
+    %R - time, 24-hour (%H:%M)
+    %s - Number of seconds since 1970-01-01 00:00:00 UTC.
+    %S - Second of the minute (00..60)
+    %t - Tab character (\t)
+    %T - time, 24-hour (%H:%M:%S)
+    %u - Day of the week as a decimal, Monday being 1. (1..7)
+    %U - Week  number  of the current year,
+            starting with the first Sunday as the first
+            day of the first week (00..53)
+    %v - VMS date (%e-%b-%Y)
+    %V - Week number of year according to ISO 8601 (01..53)
+    %W - Week  number  of the current year,
+            starting with the first Monday as the first
+            day of the first week (00..53)
+    %w - Day of the week (Sunday is 0, 0..6)
+    %x - Preferred representation for the date alone, no time
+    %X - Preferred representation for the time alone, no date
+    %y - Year without a century (00..99)
+    %Y - Year with century
+    %z - Time zone as  hour offset from UTC (e.g. +0900)
+    %Z - Time zone name
+    %% - Literal ``%'' character
+    EOS
+  ) do |arguments|
+
+    # Technically we support two arguments but only first is mandatory ...
+    raise(Puppet::ParseError, "strftime(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    format = arguments[0]
+
+    raise(Puppet::ParseError, 'strftime(): You must provide ' +
+      'format for evaluation') if format.empty?
+
+    # The Time Zone argument is optional ...
+    time_zone = arguments[1] if arguments[1]
+
+    time = Time.new
+
+    # There is probably a better way to handle Time Zone ...
+    if time_zone and not time_zone.empty?
+      original_zone = ENV['TZ']
+
+      local_time = time.clone
+      local_time = local_time.utc
+
+      ENV['TZ'] = time_zone
+
+      time = local_time.localtime
+
+      ENV['TZ'] = original_zone
+    end
+
+    result = time.strftime(format)
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/strip.rb b/lib/puppet/parser/functions/strip.rb
new file mode 100644
index 0000000..5f4630d
--- /dev/null
+++ b/lib/puppet/parser/functions/strip.rb
@@ -0,0 +1,39 @@
+#
+#  strip.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:strip, :type => :rvalue, :doc => <<-EOS
+This function removes leading and trailing whitespace from a string or from
+every string inside an array.
+
+*Examples:*
+
+    strip("    aaa   ")
+
+Would result in: "aaa"
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "strip(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    value = arguments[0]
+    klass = value.class
+
+    unless [Array, String].include?(klass)
+      raise(Puppet::ParseError, 'strip(): Requires either ' +
+        'array or string to work with')
+    end
+
+    if value.is_a?(Array)
+      result = value.collect { |i| i.is_a?(String) ? i.strip : i }
+    else
+      result = value.strip
+    end
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/swapcase.rb b/lib/puppet/parser/functions/swapcase.rb
new file mode 100644
index 0000000..b9e6632
--- /dev/null
+++ b/lib/puppet/parser/functions/swapcase.rb
@@ -0,0 +1,39 @@
+#
+#  swapcase.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:swapcase, :type => :rvalue, :doc => <<-EOS
+This function will swap the existing case of a string.
+
+*Examples:*
+
+    swapcase("aBcD")
+
+Would result in: "AbCd"
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "swapcase(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    value = arguments[0]
+    klass = value.class
+
+    unless [Array, String].include?(klass)
+      raise(Puppet::ParseError, 'swapcase(): Requires either ' +
+        'array or string to work with')
+    end
+
+    if value.is_a?(Array)
+      # Numbers in Puppet are often string-encoded which is troublesome ...
+      result = value.collect { |i| i.is_a?(String) ? i.swapcase : i }
+    else
+      result = value.swapcase
+    end
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/time.rb b/lib/puppet/parser/functions/time.rb
new file mode 100644
index 0000000..0cddaf8
--- /dev/null
+++ b/lib/puppet/parser/functions/time.rb
@@ -0,0 +1,49 @@
+#
+# time.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:time, :type => :rvalue, :doc => <<-EOS
+This function will return the current time since epoch as an integer.
+
+*Examples:*
+
+    time()
+
+Will return something like: 1311972653
+    EOS
+  ) do |arguments|
+
+    # The Time Zone argument is optional ...
+    time_zone = arguments[0] if arguments[0]
+
+    if (arguments.size != 0) and (arguments.size != 1) then
+      raise(Puppet::ParseError, "time(): Wrong number of arguments "+
+        "given #{arguments.size} for 0 or 1")
+    end
+
+    time = Time.new
+
+    # There is probably a better way to handle Time Zone ...
+    if time_zone and not time_zone.empty?
+      original_zone = ENV['TZ']
+
+      local_time = time.clone
+      local_time = local_time.utc
+
+      ENV['TZ'] = time_zone
+
+      time = local_time.localtime
+
+      ENV['TZ'] = original_zone
+    end
+
+    # Calling Time#to_i on a receiver changes it.  Trust me I am the Doctor.
+    result = time.strftime('%s')
+    result = result.to_i
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/type.rb b/lib/puppet/parser/functions/type.rb
new file mode 100644
index 0000000..8d85f11
--- /dev/null
+++ b/lib/puppet/parser/functions/type.rb
@@ -0,0 +1,50 @@
+#
+# type.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:type, :type => :rvalue, :doc => <<-EOS
+Returns the type when passed a variable. Type can be one of:
+
+* string
+* array
+* hash
+* float
+* integer
+* boolean
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "type(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    value = arguments[0]
+
+    klass = value.class
+
+    if not [TrueClass, FalseClass, Array, Bignum, Fixnum, Float, Hash, String].include?(klass)
+      raise(Puppet::ParseError, 'type(): Unknown type')
+    end
+
+    klass = klass.to_s # Ugly ...
+
+    # We note that Integer is the parent to Bignum and Fixnum ...
+    result = case klass
+      when /^(?:Big|Fix)num$/ then 'integer'
+      when /^(?:True|False)Class$/ then 'boolean'
+      else klass
+    end
+
+    if result == "String" then
+      if value == value.to_i.to_s then
+        result = "Integer"
+      elsif value == value.to_f.to_s then
+        result = "Float"
+      end
+    end
+
+    return result.downcase
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/unique.rb b/lib/puppet/parser/functions/unique.rb
new file mode 100644
index 0000000..8844a74
--- /dev/null
+++ b/lib/puppet/parser/functions/unique.rb
@@ -0,0 +1,51 @@
+#
+# unique.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:unique, :type => :rvalue, :doc => <<-EOS
+This function will remove duplicates from strings and arrays.
+
+*Examples:*
+
+    unique("aabbcc")
+
+Will return:
+
+    abc
+
+You can also use this with arrays:
+
+    unique(["a","a","b","b","c","c"])
+
+This returns:
+
+    ["a","b","c"]
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "unique(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    value = arguments[0]
+    klass = value.class
+
+    unless [Array, String].include?(klass)
+      raise(Puppet::ParseError, 'unique(): Requires either ' +
+        'array or string to work with')
+    end
+
+    result = value.clone
+
+    string = value.is_a?(String) ? true : false
+
+    # We turn any string value into an array to be able to shuffle ...
+    result = string ? result.split('') : result
+    result = result.uniq # Remove duplicates ...
+    result = string ? result.join : result
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/upcase.rb b/lib/puppet/parser/functions/upcase.rb
new file mode 100644
index 0000000..fe6cadc
--- /dev/null
+++ b/lib/puppet/parser/functions/upcase.rb
@@ -0,0 +1,41 @@
+#
+# upcase.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:upcase, :type => :rvalue, :doc => <<-EOS
+Converts a string or an array of strings to uppercase.
+
+*Examples:*
+
+    upcase("abcd")
+
+Will return:
+
+    ASDF
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "upcase(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    value = arguments[0]
+    klass = value.class
+
+    unless [Array, String].include?(klass)
+      raise(Puppet::ParseError, 'upcase(): Requires either ' +
+        'array or string to work with')
+    end
+
+    if value.is_a?(Array)
+      # Numbers in Puppet are often string-encoded which is troublesome ...
+      result = value.collect { |i| i.is_a?(String) ? i.upcase : i }
+    else
+      result = value.upcase
+    end
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/values.rb b/lib/puppet/parser/functions/values.rb
new file mode 100644
index 0000000..1606756
--- /dev/null
+++ b/lib/puppet/parser/functions/values.rb
@@ -0,0 +1,39 @@
+#
+# values.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:values, :type => :rvalue, :doc => <<-EOS
+When given a hash this function will return the values of that hash.
+
+*Examples:*
+
+    $hash = {
+      'a' => 1,
+      'b' => 2,
+      'c' => 3,
+    }
+    values($hash)
+
+This example would return:
+
+    [1,2,3]
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "values(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    hash = arguments[0]
+
+    unless hash.is_a?(Hash)
+      raise(Puppet::ParseError, 'values(): Requires hash to work with')
+    end
+
+    result = hash.values
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/values_at.rb b/lib/puppet/parser/functions/values_at.rb
new file mode 100644
index 0000000..d3e69d9
--- /dev/null
+++ b/lib/puppet/parser/functions/values_at.rb
@@ -0,0 +1,98 @@
+#
+# values_at.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:values_at, :type => :rvalue, :doc => <<-EOS
+Finds value inside an array based on location.
+
+The first argument is the array you want to analyze, and the second element can
+be a combination of:
+
+* A single numeric index
+* A range in the form of 'start-stop' (eg. 4-9)
+* An array combining the above
+
+*Examples*:
+
+    values_at(['a','b','c'], 2)
+
+Would return ['c'].
+
+    values_at(['a','b','c'], ["0-1"])
+
+Would return ['a','b'].
+
+    values_at(['a','b','c','d','e'], [0, "2-3"])
+
+Would return ['a','c','d'].
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "values_at(): Wrong number of " +
+      "arguments given (#{arguments.size} for 2)") if arguments.size < 2
+
+    array = arguments.shift
+
+    unless array.is_a?(Array)
+      raise(Puppet::ParseError, 'values_at(): Requires array to work with')
+    end
+
+    indices = [arguments.shift].flatten() # Get them all ... Pokemon ...
+
+    if not indices or indices.empty?
+      raise(Puppet::ParseError, 'values_at(): You must provide ' +
+        'at least one positive index to collect')
+    end
+
+    result       = []
+    indices_list = []
+
+    indices.each do |i|
+      if m = i.match(/^(\d+)(\.\.\.?|\-)(\d+)$/)
+        start = m[1].to_i
+        stop  = m[3].to_i
+
+        type = m[2]
+
+        if start > stop
+          raise(Puppet::ParseError, 'values_at(): Stop index in ' +
+            'given indices range is smaller than the start index')
+        elsif stop > array.size - 1 # First element is at index 0 is it not?
+          raise(Puppet::ParseError, 'values_at(): Stop index in ' +
+            'given indices range exceeds array size')
+        end
+
+        range = case type
+          when /^(\.\.|\-)$/ then (start .. stop)
+          when /^(\.\.\.)$/  then (start ... stop) # Exclusive of last element ...
+        end
+
+        range.each { |i| indices_list << i.to_i }
+      else
+        # Only positive numbers allowed in this case ...
+        if not i.match(/^\d+$/)
+          raise(Puppet::ParseError, 'values_at(): Unknown format ' +
+            'of given index')
+        end
+
+        # In Puppet numbers are often string-encoded ...
+        i = i.to_i
+
+        if i > array.size - 1 # Same story.  First element is at index 0 ...
+          raise(Puppet::ParseError, 'values_at(): Given index ' +
+            'exceeds array size')
+        end
+
+        indices_list << i
+      end
+    end
+
+    # We remove nil values as they make no sense in Puppet DSL ...
+    result = indices_list.collect { |i| array[i] }.compact
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/zip.rb b/lib/puppet/parser/functions/zip.rb
new file mode 100644
index 0000000..2b56e9c
--- /dev/null
+++ b/lib/puppet/parser/functions/zip.rb
@@ -0,0 +1,65 @@
+#
+# zip.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:zip, :type => :rvalue, :doc => <<-EOS
+Takes one element from first array and merges corresponding elements from second array. This generates a sequence of n-element arrays, where n is one more than the count of arguments.
+
+*Example:*
+
+    zip(['1','2','3'],['4','5','6'])
+
+Would result in:
+
+    ["1", "4"], ["2", "5"], ["3", "6"]
+    EOS
+  ) do |arguments|
+
+    # Technically we support three arguments but only first is mandatory ...
+    raise(Puppet::ParseError, "zip(): Wrong number of arguments " +
+      "given (#{arguments.size} for 2)") if arguments.size < 2
+
+    a = arguments[0]
+    b = arguments[1]
+
+    unless a.is_a?(Array) and b.is_a?(Array)
+      raise(Puppet::ParseError, 'zip(): Requires array to work with')
+    end
+
+    flatten = arguments[2] if arguments[2]
+
+    if flatten
+      klass = flatten.class
+
+      # We can have either true or false, or string which resembles boolean ...
+      unless [FalseClass, TrueClass, String].include?(klass)
+        raise(Puppet::ParseError, 'zip(): Requires either ' +
+          'boolean or string to work with')
+      end
+
+      if flatten.is_a?(String)
+        # We consider all the yes, no, y, n and so on too ...
+        flatten = case flatten
+          #
+          # This is how undef looks like in Puppet ...
+          # We yield false in this case.
+          #
+          when /^$/, '' then false # Empty string will be false ...
+          when /^(1|t|y|true|yes)$/  then true
+          when /^(0|f|n|false|no)$/  then false
+          when /^(undef|undefined)$/ then false # This is not likely to happen ...
+          else
+            raise(Puppet::ParseError, 'zip(): Unknown type of boolean given')
+        end
+      end
+    end
+
+    result = a.zip(b)
+    result = flatten ? result.flatten : result
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :