Populate an array in ruby with 7n +1 -

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how make following array programatically in ruby (1.9).

it follows pattern 7n + 1 , i'd contain 24 numbers. 

arr = ["8","15","22","29","36","43","50","57","64","71" ]

use collect , apply to_s on result:

(1..24).collect{|n| (n*7 + 1).to_s}

edit: sorry forgot convert numbers strings. code edited now.


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