From: Stefano Crocco <stefano.crocco@...>
Date: 2010-09-08T21:08:57+09:00
Subject: Re: Small improvements ideas ?

On Wednesday 08 September 2010, Chris wrote:
> |Hello, I would like to know how to shorten these two lines
> |
> |1) doit() if my_string && my_string.downcase == 'hello'
> |2) doit() if one_var && (my_string =~ /this_regexp/) == nil
> |
> |Case 1) is a way to check for my_string beeing nil (would break on
> |downcase call). But it's verbose, nothing better ??
You can do

	if (my_string || '').downcase == 'hello'

This way, if my_string is nil, the parentheses will evaluate to '' which is a 
string and will always be different from 'hello'


> |Case 2) I want doit beeing call if regexp don't match. would I use !
> |(my_string =~ /this_regexp/) but I don't like using ! because it's not
> |very readable and I can't use not keyword in this case

I think you can:

if one_var && (not(my_string =~ /this_regexp/))

> |Thanks

I hope this helps

Stefano