adding an integer to values in an array in ruby

Question

This is my array

arr = [1,2,3,4,5,6,7,8]

I want to write a method in ruby that would add 5 to each value in the array. How can I do the same ?

Please guide.

tomferon · Accepted Answer · 2012-06-27 07:57:59Z

4

You can use Array#map like this :

arr = [1,2,3,4,5,6,7,8]
arr.map {|n| n+5 }

EDIT: map will return a new array, if you want to modify this very array, use map! even if I wouldn't recommend it.

answered Jun 27, 2012 at 7:57

tomferon

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Comments

mhutter · Accepted Answer · 2012-06-27 08:01:06Z

1

arr.map! {|i| i+5}

answered Jun 27, 2012 at 8:01

mhutter

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