diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/object')
7 files changed, 56 insertions, 47 deletions
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 2e99f4a1b8..0191d2e973 100644 --- a/activesupport/lib/active_support/core_ext/object/deep_dup.rb +++ b/activesupport/lib/active_support/core_ext/object/deep_dup.rb @@ -25,7 +25,7 @@ class Array # array[1][2] # => nil # dup[1][2] # => 4 def deep_dup - map { |it| it.deep_dup } + map(&:deep_dup) 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 665cb0f96d..620f7b6561 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 and BigDecimal(in 1.9.x) objects; + # False for +nil+, +false+, +true+, symbol, number objects; # true otherwise. def duplicable? true @@ -78,17 +78,8 @@ end require 'bigdecimal' class BigDecimal - # Needed to support Ruby 1.9.x, as it doesn't allow dup on BigDecimal, instead - # raises TypeError exception. Checking here on the runtime whether BigDecimal - # will allow dup or not. - begin - BigDecimal.new('4.56').dup - - def duplicable? - true - end - rescue TypeError - # can't dup, so use superclass implementation + def duplicable? + true end end diff --git a/activesupport/lib/active_support/core_ext/object/instance_variables.rb b/activesupport/lib/active_support/core_ext/object/instance_variables.rb index 755e1c6b16..593a7a4940 100644 --- a/activesupport/lib/active_support/core_ext/object/instance_variables.rb +++ b/activesupport/lib/active_support/core_ext/object/instance_variables.rb @@ -23,6 +23,6 @@ class Object # # C.new(0, 1).instance_variable_names # => ["@y", "@x"] def instance_variable_names - instance_variables.map { |var| var.to_s } + instance_variables.map(&:to_s) end end diff --git a/activesupport/lib/active_support/core_ext/object/itself.rb b/activesupport/lib/active_support/core_ext/object/itself.rb deleted file mode 100644 index d71cea6674..0000000000 --- a/activesupport/lib/active_support/core_ext/object/itself.rb +++ /dev/null @@ -1,15 +0,0 @@ -class Object - # TODO: Remove this file when we drop support for Ruby < 2.2 - unless respond_to?(:itself) - # Returns the object itself. - # - # Useful for chaining methods, such as Active Record scopes: - # - # Event.public_send(state.presence_in([ :trashed, :drafted ]) || :itself).order(:created_at) - # - # @return Object - def itself - self - end - end -end diff --git a/activesupport/lib/active_support/core_ext/object/to_query.rb b/activesupport/lib/active_support/core_ext/object/to_query.rb index ccd568bbf5..ec5ace4e16 100644 --- a/activesupport/lib/active_support/core_ext/object/to_query.rb +++ b/activesupport/lib/active_support/core_ext/object/to_query.rb @@ -38,7 +38,7 @@ class Array # Calls <tt>to_param</tt> on all its elements and joins the result with # slashes. This is used by <tt>url_for</tt> in Action Pack. def to_param - collect { |e| e.to_param }.join '/' + collect(&:to_param).join '/' end # Converts an array into a string suitable for use as a URL query string, diff --git a/activesupport/lib/active_support/core_ext/object/try.rb b/activesupport/lib/active_support/core_ext/object/try.rb index 31919474ed..e0f70b9caa 100644 --- a/activesupport/lib/active_support/core_ext/object/try.rb +++ b/activesupport/lib/active_support/core_ext/object/try.rb @@ -9,7 +9,23 @@ class Object # # instead of # - # @person ? @person.name : nil + # @person.name if @person + # + # +try+ calls can be chained: + # + # @person.try(:spouse).try(:name) + # + # instead of + # + # @person.spouse.name if @person && @person.spouse + # + # +try+ will also return +nil+ if the receiver does not respond to the method: + # + # @person.try(:non_existing_method) # => nil + # + # instead of + # + # @person.non_existing_method if @person.respond_to?(:non_existing_method) # => nil # # +try+ returns +nil+ when called on +nil+ regardless of whether it responds # to the method: @@ -24,7 +40,7 @@ class Object # # The number of arguments in the signature must match. If the object responds # to the method the call is attempted and +ArgumentError+ is still raised - # otherwise. + # in case of argument mismatch. # # If +try+ is called without arguments it yields the receiver to a given # block unless it is +nil+: @@ -38,12 +54,22 @@ class Object # # @person.try { upcase.truncate(50) } # - # Please also note that +try+ is defined on +Object+, therefore it won't work + # 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 - # delegator itself. + # the delegator itself. def try(*a, &b) + try!(*a, &b) if a.empty? || respond_to?(a.first) + end + + # 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) @@ -51,16 +77,6 @@ class Object yield self end else - public_send(*a, &b) if respond_to?(a.first) - end - end - - # Same as #try, but will raise a NoMethodError exception if the receiving is not nil and - # does not implement the tried method. - def try!(*a, &b) - if a.empty? && block_given? - yield self - else public_send(*a, &b) end end @@ -68,12 +84,12 @@ end class NilClass # Calling +try+ on +nil+ always returns +nil+. - # It becomes specially helpful when navigating through associations that may return +nil+. + # It becomes especially helpful when navigating through associations that may return +nil+. # # nil.try(:name) # => nil # # Without +try+ - # @person && !@person.children.blank? && @person.children.first.name + # @person && @person.children.any? && @person.children.first.name # # With +try+ # @person.try(:children).try(:first).try(:name) @@ -81,6 +97,9 @@ class NilClass nil end + # Calling +try!+ on +nil+ always returns +nil+. + # + # nil.try!(:name) # => nil def try!(*args) nil end diff --git a/activesupport/lib/active_support/core_ext/object/with_options.rb b/activesupport/lib/active_support/core_ext/object/with_options.rb index 42e87c4424..7d38e1d134 100644 --- a/activesupport/lib/active_support/core_ext/object/with_options.rb +++ b/activesupport/lib/active_support/core_ext/object/with_options.rb @@ -47,7 +47,21 @@ class Object # end # # <tt>with_options</tt> can also be nested since the call is forwarded to its receiver. - # Each nesting level will merge inherited defaults in addition to their own. + # + # NOTE: Each nesting level will merge inherited defaults in addition to their own. + # + # class Post < ActiveRecord::Base + # with_options if: :persisted?, length: { minimum: 50 } do + # validates :content, if: -> { content.present? } + # end + # end + # + # The code is equivalent to: + # + # validates :content, length: { minimum: 50 }, if: -> { content.present? } + # + # Hence the inherited default for `if` key is ignored. + # def with_options(options, &block) option_merger = ActiveSupport::OptionMerger.new(self, options) block.arity.zero? ? option_merger.instance_eval(&block) : block.call(option_merger) |