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View File Name : fetch-c.ri

U:RDoc::AnyMethod[iI"
fetch:ETI"ENV::fetch;TT:publico:RDoc::Markup::Document:@parts[o:RDoc::Markup::Paragraph;	[I"IIf +name+ is the name of an environment variable, returns its value:;To:RDoc::Markup::Verbatim;	[I"ENV['foo'] = '0'
;TI"ENV.fetch('foo') # => '0'
;T:@format0o;
;	[I">Otherwise if a block is given (but not a default value), ;TI"Eyields +name+ to the block and returns the block's return value:;To;;	[I"ZENV.fetch('foo') { |name| :need_not_return_a_string } # => :need_not_return_a_string
;T;0o;
;	[I"XOtherwise if a default value is given (but not a block), returns the default value:;To;;	[I"ENV.delete('foo')
;TI"XENV.fetch('foo', :default_need_not_be_a_string) # => :default_need_not_be_a_string
;T;0o;
;	[I"VIf the environment variable does not exist and both default and block are given, ;TI"Lissues a warning ("warning: block supersedes default value argument"), ;TI"Fyields +name+ to the block, and returns the block's return value:;To;;	[I"LENV.fetch('foo', :default) { |name| :block_return } # => :block_return
;T;0o;
;	[I"8Raises KeyError if +name+ is valid, but not found, ;TI"2and neither default value nor block is given:;To;;	[I"?ENV.fetch('foo') # Raises KeyError (key not found: "foo")
;T;0o;
;	[I"/Raises an exception if +name+ is invalid. ;TI"OSee {Invalid Names and Values}[#class-ENV-label-Invalid-Names+and+Values].;T:
@fileI"hash.c;T:0@omit_headings_from_table_of_contents_below0I"~ENV.fetch(name)                  -> value
ENV.fetch(name, default)         -> value
ENV.fetch(name) { |name| block } -> value
;T0[�I"(*args);T@3FI"ENV;TcRDoc::NormalClass00