diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/object')
5 files changed, 87 insertions, 27 deletions
diff --git a/activesupport/lib/active_support/core_ext/object/blank.rb b/activesupport/lib/active_support/core_ext/object/blank.rb index 38e43478df..039c50a4a2 100644 --- a/activesupport/lib/active_support/core_ext/object/blank.rb +++ b/activesupport/lib/active_support/core_ext/object/blank.rb @@ -1,12 +1,10 @@ -# encoding: utf-8 - class Object # An object is blank if it's false, empty, or a whitespace string. - # For example, '', ' ', +nil+, [], and {} are all blank. + # For example, +false+, '', ' ', +nil+, [], and {} are all blank. # # This simplifies # - # address.nil? || address.empty? + # !address || address.empty? # # to # @@ -129,3 +127,14 @@ class Numeric #:nodoc: false end end + +class Time #:nodoc: + # No Time is blank: + # + # Time.now.blank? # => false + # + # @return [false] + def blank? + false + end +end diff --git a/activesupport/lib/active_support/core_ext/object/deep_dup.rb b/activesupport/lib/active_support/core_ext/object/deep_dup.rb index 0191d2e973..8dfeed0066 100644 --- a/activesupport/lib/active_support/core_ext/object/deep_dup.rb +++ b/activesupport/lib/active_support/core_ext/object/deep_dup.rb @@ -39,8 +39,15 @@ class Hash # hash[:a][:c] # => nil # dup[:a][:c] # => "c" def deep_dup - each_with_object(dup) do |(key, value), hash| - hash[key.deep_dup] = value.deep_dup + hash = dup + each_pair do |key, value| + if key.frozen? && ::String === key + hash[key] = value.deep_dup + else + hash.delete(key) + hash[key.deep_dup] = value.deep_dup + end end + hash end end diff --git a/activesupport/lib/active_support/core_ext/object/duplicable.rb b/activesupport/lib/active_support/core_ext/object/duplicable.rb index 620f7b6561..befa5aee21 100644 --- a/activesupport/lib/active_support/core_ext/object/duplicable.rb +++ b/activesupport/lib/active_support/core_ext/object/duplicable.rb @@ -19,7 +19,7 @@ class Object # Can you safely dup this object? # - # False for +nil+, +false+, +true+, symbol, number objects; + # False for +nil+, +false+, +true+, symbol, number, method objects; # true otherwise. def duplicable? true @@ -78,6 +78,10 @@ end require 'bigdecimal' class BigDecimal + # BigDecimals are duplicable: + # + # BigDecimal.new("1.2").duplicable? # => true + # BigDecimal.new("1.2").dup # => #<BigDecimal:...,'0.12E1',18(18)> def duplicable? true end diff --git a/activesupport/lib/active_support/core_ext/object/inclusion.rb b/activesupport/lib/active_support/core_ext/object/inclusion.rb index 55f281b213..d4c17dfb07 100644 --- a/activesupport/lib/active_support/core_ext/object/inclusion.rb +++ b/activesupport/lib/active_support/core_ext/object/inclusion.rb @@ -5,7 +5,7 @@ class Object # characters = ["Konata", "Kagami", "Tsukasa"] # "Konata".in?(characters) # => true # - # This will throw an ArgumentError if the argument doesn't respond + # This will throw an +ArgumentError+ if the argument doesn't respond # to +#include?+. def in?(another_object) another_object.include?(self) @@ -18,7 +18,7 @@ class Object # # params[:bucket_type].presence_in %w( project calendar ) # - # This will throw an ArgumentError if the argument doesn't respond to +#include?+. + # This will throw an +ArgumentError+ if the argument doesn't respond to +#include?+. # # @return [Object] def presence_in(another_object) diff --git a/activesupport/lib/active_support/core_ext/object/try.rb b/activesupport/lib/active_support/core_ext/object/try.rb index e0f70b9caa..8c16d95b62 100644 --- a/activesupport/lib/active_support/core_ext/object/try.rb +++ b/activesupport/lib/active_support/core_ext/object/try.rb @@ -1,4 +1,34 @@ +require 'delegate' + +module ActiveSupport + module Tryable #:nodoc: + def try(*a, &b) + try!(*a, &b) if a.empty? || respond_to?(a.first) + end + + def try!(*a, &b) + if a.empty? && block_given? + if b.arity == 0 + instance_eval(&b) + else + yield self + end + else + public_send(*a, &b) + end + end + end +end + class Object + include ActiveSupport::Tryable + + ## + # :method: try + # + # :call-seq: + # try(*a, &b) + # # Invokes the public method whose name goes as first argument just like # +public_send+ does, except that if the receiver does not respond to it the # call returns +nil+ rather than raising an exception. @@ -56,30 +86,40 @@ class Object # # Please also note that +try+ is defined on +Object+. Therefore, it won't work # with instances of classes that do not have +Object+ among their ancestors, - # like direct subclasses of +BasicObject+. For example, using +try+ with - # +SimpleDelegator+ will delegate +try+ to the target instead of calling it on - # the delegator itself. - def try(*a, &b) - try!(*a, &b) if a.empty? || respond_to?(a.first) - end + # like direct subclasses of +BasicObject+. - # Same as #try, but raises a NoMethodError exception if the receiver is + ## + # :method: try! + # + # :call-seq: + # try!(*a, &b) + # + # Same as #try, but raises a +NoMethodError+ exception if the receiver is # not +nil+ and does not implement the tried method. # # "a".try!(:upcase) # => "A" # nil.try!(:upcase) # => nil # 123.try!(:upcase) # => NoMethodError: undefined method `upcase' for 123:Fixnum - def try!(*a, &b) - if a.empty? && block_given? - if b.arity.zero? - instance_eval(&b) - else - yield self - end - else - public_send(*a, &b) - end - end +end + +class Delegator + include ActiveSupport::Tryable + + ## + # :method: try + # + # :call-seq: + # try(a*, &b) + # + # See Object#try + + ## + # :method: try! + # + # :call-seq: + # try!(a*, &b) + # + # See Object#try! end class NilClass |