method
map
map()
public
Invokes the given block once for each element of self.
Creates a new array containing the values returned by the block.
See also Enumerable#collect.
If no block is given, an Enumerator is returned instead.
a = [ "a", "b", "c", "d" ] a.collect { |x| x + "!" } #=> ["a!", "b!", "c!", "d!"] a.map.with_index { |x, i| x * i } #=> ["", "b", "cc", "ddd"] a #=> ["a", "b", "c", "d"]