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--- !ruby/object:RI::MethodDescription aliases: [] block_params: comment: - !ruby/struct:SM::Flow::P body: Returns the index of the first occurrence of the given <em>substring</em>, character (<em>fixnum</em>), or pattern (<em>regexp</em>) in <em>str</em>. Returns <tt>nil</tt> if not found. If the second parameter is present, it specifies the position in the string to begin the search. - !ruby/struct:SM::Flow::VERB body: " "hello".index('e') #=> 1\n "hello".index('lo') #=> 3\n "hello".index('a') #=> nil\n "hello".index(101) #=> 1\n "hello".index(/[aeiou]/, -3) #=> 4\n" full_name: String#index is_singleton: false name: index params: | str.index(substring [, offset]) => fixnum or nil str.index(fixnum [, offset]) => fixnum or nil str.index(regexp [, offset]) => fixnum or nil visibility: public