Ruby array into method

Question

I have an array in Ruby, like ["dog", "cat", bat"]. How can I get an array in which each element is passed to a particular method? For example, if the method reverses the input string, then I expect to get ["god", "tac", "tab"]. I know it's easy to iterate over the elements, pass them into the method, and put the results into an array. But is there a shorter way?

EDIT: I'd also not like to modify the original array.

map will not modify original array

hs-
– hs-

2012-11-24 21:07:23 +00:00
Commented Nov 24, 2012 at 21:07 — hs-
– hs-, Commented Nov 24, 2012 at 21:07

David Grayson · Accepted Answer · 2012-11-24 21:03:35Z

6

["dog", "cat", "bat"].map { |word| word.reverse }

or

["dog", "cat", "bat"].map &:reverse

answered Nov 24, 2012 at 21:03

David Grayson

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2 Comments

David Grayson Over a year ago

No, it's a standard part of ruby syntax. I just tried it in irb without any gems and it worked.

x1a4 Over a year ago

It's available in any version of Ruby that has Symbol#to_proc. I believe it was added in 1.8.7.

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