collect() public

Returns a new array with the results of running block once for every element in enum.

(1..4).collect {|i| i*i }   #=> [1, 4, 9, 16]
(1..4).collect { "cat"  }   #=> ["cat", "cat", "cat", "cat"]
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March 18, 2010 - (v1_8_6_287 - v1_8_7_72)
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collect_with_index

Use Object#enum_for if you need to collect with index:

require 'enumerator'

%w{foo bar}.enum_for(:each_with_index).collect do |item, index| 
  "#{index}: #{item}" 
end

See also: Enumerable#each_with_index