ary.index(obj) â int or nil
ary.index { |item| block } â int or nil
ary.index â Enumerator
ary.index { |item| block } â int or nil
ary.index â Enumerator
Instance Public methods
Returns the index of the first object in ary such
that the object is == to obj.
If a block is given instead of an argument, returns the index of
the first object for which the block returns true. Returns
nil if no match is found.
See also #rindex.
An Enumerator is returned if neither a block nor argument is given.
1 2 3 4 | a = [ "a", "b", "c" ]a.index("b") #=> 1a.index("z") #=> nila.index { |x| x == "b" } #=> 1 |
This is an alias of #find_index.
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