Why does this code 'lock up' ruby? And what is the best way to get past it? I posted my solution below. Is there another way to do this? Thanks in advance!
Code:
nums = [1, 2, 3]
nums.each { |i| nums << i + 1 }
My solution:
nums = [1, 2, 3]
adjustments = []
nums.each { |i| adjustments << i + 1 }
nums += adjustments
That's because each uses an enumerator (so it never reaches the end if you keep adding to it).
You can duplicate the array before applying each.
nums = [1, 2, 3]
nums.dup.each { |i| nums << i + 1 }
Another way is to append the extra elements given by map:
nums = [1, 2, 3]
nums += nums.map { |i| i + 1 }
nums = [1, 2, 3]
nums.each { |i| nums << i + 1 }
You are adding to the array as you're iterating over it, so it never finishes executing.
