From: w wg <duzuike@...>
Date: 2008-09-26T18:04:52+09:00
Subject: How does Array's each method change its elements ?

Hi,

I found Array's each method (block) changes its elements sometimes,
but sometimes it don't.

Please look this:

a = [1,2,3,4,5]
b = a.each  { |x| x + 1}

puts a
[1,2,3,4,5]
puts b
[1,2,3,4,5]

The array  keeps no changed.


But, look another:

a = ["how","are","you"]
b = a.each { |x|  x <<  "-"  }
puts a
["how-","are-","you-"]
puts b
["how-","are-","you-"]

The array changed!

I want to know how does Array's each method (block) change its elements ?

Thank you.


--
Wang