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-rw-r--r--README.markdown4
1 files changed, 2 insertions, 2 deletions
diff --git a/README.markdown b/README.markdown
index 27dd0a7..d023f23 100644
--- a/README.markdown
+++ b/README.markdown
@@ -224,7 +224,7 @@ Converts the case of a string or of all strings in an array to lowercase. *Type*
#### `empty`
-Returns true if the argument is an array or hash that contains no elements, or an empty string. *Type*: rvalue.
+Returns true if the argument is an array or hash that contains no elements, or an empty string. Returns false when the argument is a numerical value. *Type*: rvalue.
#### `ensure_packages`
@@ -405,7 +405,7 @@ Returns an array an intersection of two. For example, `intersection(["a","b","c"
#### `is_a`
-Boolean check to determine whether a variable is of a given data type. This is equivalent to the `=~` type checks.
+Boolean check to determine whether a variable is of a given data type. This is equivalent to the `=~` type checks. This function is only available in Puppet 4, or when using the "future" parser.
~~~
foo = 3