remove whitespace from each array item rails

Question

I found this code:

.each_key {|a| self[a].strip! if self[a].respond_to? :strip! }

on this website: http://granth.ca/2006/02/strip-whitespace

but I assume that is for a hash, I am trying to do the same with an array.

I have tried a few different things, but cannot figure it out.

Thank you for any help

Answer 1

Pretty much the same, only you change each_key to a method to process every element of array (each) and self[a] to a (since you don't need to look into hash anymore).

.each {|a| a.strip! if a.respond_to? :strip! }

edit
An example

x = [" 1  ", "b", " c ", 5]
x.each {|a| a.strip! if a.respond_to? :strip! }
puts x.inspect

Output:

["1", "b", "c", 5]

No whitespaces on string ends anymore.

Answer 2

This is what collect is for.

yourArray.collect{|x| x.strip}

alternatively:

yourArray.collect(&:strip)

http://apidock.com/ruby/Array/collect