From: Arup Rakshit <lists@...>
Date: 2013-01-12T16:54:43+09:00
Subject: what is the difference between a.map and a.map?

Hi,

I am confused with the working of a.map and a.map! on the array
collection.

irb(main):001:0> a = [1,2,3,4]
=> [1, 2, 3, 4]
irb(main):002:0> a.map {|n| n+1}
=> [2, 3, 4, 5]
irb(main):003:0> puts a.inspect
[1, 2, 3, 4]
=> nil
irb(main):004:0> a.map! {|n| n+1}
=> [2, 3, 4, 5]
irb(main):005:0> puts a.inspect
[2, 3, 4, 5]
=> nil
irb(main):006:0>

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