>> 4 while line = STDIN.gets

> Ok, so I'm a noob trying to learn something here...
> 
> Shouldn't line 4 be presented with a double = (==) since you're trying 
> do something while line == STDIN.gets?
No, the assignment of line = STDIN.gets happens first which reads up to 
a '\n' including it. While then loops while this value is true.

When there is no more inmput, line will be assigned nothing which is 
false and the loop ends.

This works identically to other languages like perl/python/php


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