1 files changed, 35 insertions, 0 deletions
diff --git a/lib/leap_cli/core_ext/hash.rb b/lib/leap_cli/core_ext/hash.rb
new file mode 100644
index 0000000..7df33b2
--- /dev/null
+++ b/lib/leap_cli/core_ext/hash.rb
@@ -0,0 +1,35 @@
+class Hash
+
+  ##
+  ## CONVERTING
+  ##
+
+  #
+  # convert self into a hash, but only include the specified keys
+  #
+  def pick(*keys)
+    keys.map(&:to_s).inject({}) do |hsh, key|
+      if has_key?(key)
+        hsh[key] = self[key]
+      end
+      hsh
+    end
+  end
+
+  #
+  # recursive merging (aka deep merge)
+  # taken from ActiveSupport::CoreExtensions::Hash::DeepMerge
+  #
+  def deep_merge(other_hash)
+    self.merge(other_hash) do |key, oldval, newval|
+      oldval = oldval.to_hash if oldval.respond_to?(:to_hash)
+      newval = newval.to_hash if newval.respond_to?(:to_hash)
+      oldval.class.to_s == 'Hash' && newval.class.to_s == 'Hash' ? oldval.deep_merge(newval) : newval
+    end
+  end
+
+  def deep_merge!(other_hash)
+    replace(deep_merge(other_hash))
+  end
+
+end