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Document Object#blank?. Closes #6491.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@6793 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
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1 parent 5b41419 commit ae2db50873a760162053ed43a01c8d84872bd7c8 @jeremy jeremy committed May 20, 2007
Showing with 12 additions and 4 deletions.
  1. +2 −0 activesupport/CHANGELOG
  2. +10 −4 activesupport/lib/active_support/core_ext/blank.rb
@@ -1,5 +1,7 @@
*SVN*
+* Document Object#blank?. #6491 [Chris Mear]
+
* Date, Time, and DateTime#to_json. #8399 [wycats]
* Simplify API of assert_difference by passing in an expression that is evaluated before and after the passed in block. See documenation for examples of new API. [Marcel Molina Jr.]
@@ -1,6 +1,12 @@
-class Object
- # "", " ", nil, [], and {} are blank
- def blank? #:nodoc:
+class Object
+ # An object is blank if it's nil, empty, or a whitespace string.
+ # For example, "", " ", nil, [], and {} are blank.
+ #
+ # This simplifies
+ # if !address.nil? && !address.empty?
+ # to
+ # if !address.blank?
+ def blank?
if respond_to?(:empty?) && respond_to?(:strip)
empty? or strip.empty?
elsif respond_to?(:empty?)
@@ -47,4 +53,4 @@ class Numeric #:nodoc:
def blank?
false
end
-end
+end

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