diff options
Diffstat (limited to 'activesupport')
| -rw-r--r-- | activesupport/CHANGELOG.md | 4 | ||||
| -rw-r--r-- | activesupport/lib/active_support/core_ext/object/blank.rb | 60 | ||||
| -rw-r--r-- | activesupport/test/core_ext/blank_test.rb | 18 |
3 files changed, 57 insertions, 25 deletions
diff --git a/activesupport/CHANGELOG.md b/activesupport/CHANGELOG.md index 3379460fa2..338e9a1e13 100644 --- a/activesupport/CHANGELOG.md +++ b/activesupport/CHANGELOG.md @@ -1,3 +1,7 @@ +* `blank?` and `present?` commit to return singletons. + + *Xavier Noria*, *Pavel Pravosud* + * Fixed Float related error in NumberHelper with large precisions. before: diff --git a/activesupport/lib/active_support/core_ext/object/blank.rb b/activesupport/lib/active_support/core_ext/object/blank.rb index a4b3234fda..38e43478df 100644 --- a/activesupport/lib/active_support/core_ext/object/blank.rb +++ b/activesupport/lib/active_support/core_ext/object/blank.rb @@ -4,36 +4,42 @@ class Object # An object is blank if it's false, empty, or a whitespace string. # For example, '', ' ', +nil+, [], and {} are all blank. # - # This simplifies: + # This simplifies # - # if address.nil? || address.empty? + # address.nil? || address.empty? # - # ...to: + # to # - # if address.blank? + # address.blank? + # + # @return [true, false] def blank? - respond_to?(:empty?) ? empty? : !self + respond_to?(:empty?) ? !!empty? : !self end - # An object is present if it's not <tt>blank?</tt>. + # An object is present if it's not blank. + # + # @return [true, false] def present? !blank? end - # Returns object if it's <tt>present?</tt> otherwise returns +nil+. - # <tt>object.presence</tt> is equivalent to <tt>object.present? ? object : nil</tt>. + # Returns the receiver if it's present otherwise returns +nil+. + # <tt>object.presence</tt> is equivalent to # - # This is handy for any representation of objects where blank is the same - # as not present at all. For example, this simplifies a common check for - # HTTP POST/query parameters: + # object.present? ? object : nil + # + # For example, something like # # state = params[:state] if params[:state].present? # country = params[:country] if params[:country].present? # region = state || country || 'US' # - # ...becomes: + # becomes # # region = params[:state].presence || params[:country].presence || 'US' + # + # @return [Object] def presence self if present? end @@ -43,6 +49,8 @@ class NilClass # +nil+ is blank: # # nil.blank? # => true + # + # @return [true] def blank? true end @@ -52,6 +60,8 @@ class FalseClass # +false+ is blank: # # false.blank? # => true + # + # @return [true] def blank? true end @@ -61,6 +71,8 @@ class TrueClass # +true+ is not blank: # # true.blank? # => false + # + # @return [false] def blank? false end @@ -71,6 +83,8 @@ class Array # # [].blank? # => true # [1,2,3].blank? # => false + # + # @return [true, false] alias_method :blank?, :empty? end @@ -79,20 +93,28 @@ class Hash # # {}.blank? # => true # { key: 'value' }.blank? # => false + # + # @return [true, false] alias_method :blank?, :empty? end class String - BLANK_MATCHER = /\A[[:space:]]*\z/ + BLANK_RE = /\A[[:space:]]*\z/ # A string is blank if it's empty or contains whitespaces only: # - # ''.blank? # => true - # ' '.blank? # => true - # ' '.blank? # => true - # ' something here '.blank? # => false + # ''.blank? # => true + # ' '.blank? # => true + # "\t\n\r".blank? # => true + # ' blah '.blank? # => false + # + # Unicode whitespace is supported: + # + # "\u00a0".blank? # => true + # + # @return [true, false] def blank? - self =~ BLANK_MATCHER + BLANK_RE === self end end @@ -101,6 +123,8 @@ class Numeric #:nodoc: # # 1.blank? # => false # 0.blank? # => false + # + # @return [false] def blank? false end diff --git a/activesupport/test/core_ext/blank_test.rb b/activesupport/test/core_ext/blank_test.rb index 3e3176f993..246bc7fa61 100644 --- a/activesupport/test/core_ext/blank_test.rb +++ b/activesupport/test/core_ext/blank_test.rb @@ -5,24 +5,28 @@ require 'active_support/core_ext/object/blank' class BlankTest < ActiveSupport::TestCase class EmptyTrue - def empty?() true; end + def empty? + 0 + end end class EmptyFalse - def empty?() false; end + def empty? + nil + end end - BLANK = [ EmptyTrue.new, nil, false, '', ' ', " \n\t \r ", ' ', [], {} ] + BLANK = [ EmptyTrue.new, nil, false, '', ' ', " \n\t \r ", ' ', "\u00a0", [], {} ] NOT = [ EmptyFalse.new, Object.new, true, 0, 1, 'a', [nil], { nil => 0 } ] def test_blank - BLANK.each { |v| assert v.blank?, "#{v.inspect} should be blank" } - NOT.each { |v| assert !v.blank?, "#{v.inspect} should not be blank" } + BLANK.each { |v| assert_equal true, v.blank?, "#{v.inspect} should be blank" } + NOT.each { |v| assert_equal false, v.blank?, "#{v.inspect} should not be blank" } end def test_present - BLANK.each { |v| assert !v.present?, "#{v.inspect} should not be present" } - NOT.each { |v| assert v.present?, "#{v.inspect} should be present" } + BLANK.each { |v| assert_equal false, v.present?, "#{v.inspect} should not be present" } + NOT.each { |v| assert_equal true, v.present?, "#{v.inspect} should be present" } end def test_presence |