index(...) public

Returns the index of the first object in self such that is == to obj. If a block is given instead of an argument, returns first object for which block is true. Returns nil if no match is found.

   a = [ "a", "b", "c" ]
   a.index("b")        #=> 1
   a.index("z")        #=> nil
   a.index{|x|x=="b"}  #=> 1

This is an alias of #find_index.

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July 8, 2009
1 thank

This is an alias

Please comment under the real method instead: find_index