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opt
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alt
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ruby23
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share
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ri
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2.3.0
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system
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OpenStruct
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Filename :
cdesc-OpenStruct.ri
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U:RDoc::NormalClass[iI"OpenStruct:ET@I" Object;To:RDoc::Markup::Document: @parts[o;;[ : @fileI"%ext/json/lib/json/add/ostruct.rb;T:0@omit_headings_from_table_of_contents_below0o;;[o: RDoc::Markup::Paragraph;[ I"KAn OpenStruct is a data structure, similar to a Hash, that allows the ;TI"Pdefinition of arbitrary attributes with their accompanying values. This is ;TI"Qaccomplished by using Ruby's metaprogramming to define methods on the class ;TI" itself.;To: RDoc::Markup::BlankLine S:RDoc::Markup::Heading: leveli: textI" Examples;T@o:RDoc::Markup::Verbatim;[I"require "ostruct" ;TI" ;TI" person = OpenStruct.new ;TI" person.name = "John Smith" ;TI"person.age = 70 ;TI" ;TI"(person.name # => "John Smith" ;TI" person.age # => 70 ;TI" person.address # => nil ;T: @format0o; ;[I"PAn OpenStruct employs a Hash internally to store the attributes and values ;TI"*and can even be initialized with one:;T@o;;[I"Qaustralia = OpenStruct.new(:country => "Australia", :capital => "Canberra") ;TI"B # => #<OpenStruct country="Australia", capital="Canberra"> ;T;0o; ;[ I"MHash keys with spaces or characters that could normally not be used for ;TI"Nmethod calls (e.g. <code>()[]*</code>) will not be immediately available ;TI"Oon the OpenStruct object as a method for retrieval or assignment, but can ;TI"5still be reached through the Object#send method.;T@o;;[ I"?measurements = OpenStruct.new("length (in inches)" => 24) ;TI"7measurements.send("length (in inches)") # => 24 ;TI" ;TI"0message = OpenStruct.new(:queued? => true) ;TI"9message.queued? # => true ;TI"%message.send("queued?=", false) ;TI":message.queued? # => false ;T;0o; ;[I"IRemoving the presence of an attribute requires the execution of the ;TI"Idelete_field method as setting the property value to +nil+ will not ;TI"remove the attribute.;T@o;;[I"Kfirst_pet = OpenStruct.new(:name => "Rowdy", :owner => "John Smith") ;TI"3second_pet = OpenStruct.new(:name => "Rowdy") ;TI" ;TI"first_pet.owner = nil ;TI"Jfirst_pet # => #<OpenStruct name="Rowdy", owner=nil> ;TI"*first_pet == second_pet # => false ;TI" ;TI"$first_pet.delete_field(:owner) ;TI"?first_pet # => #<OpenStruct name="Rowdy"> ;TI")first_pet == second_pet # => true ;T;0S; ;i;I"Implementation;T@o; ;[I"RAn OpenStruct utilizes Ruby's method lookup structure to find and define the ;TI"Pnecessary methods for properties. This is accomplished through the methods ;TI"0method_missing and define_singleton_method.;T@o; ;[I"SThis should be a consideration if there is a concern about the performance of ;TI"Qthe objects that are created, as there is much more overhead in the setting ;TI">of these properties compared to using a Hash or a Struct.;T; I"lib/ostruct.rb;T; 0; 0; 0[ [ [ [[I" class;T[[: public[[I"json_create;FI"%ext/json/lib/json/add/ostruct.rb;T[:protected[ [: private[ [I" instance;T[[;[[I" as_json;F@d[I" to_json;F@d[;[ [;[ [ [U:RDoc::Context::Section[i 0o;;[ ; 0; 0[@ @X@XcRDoc::TopLevel