From: Andrei Beliankou <letteras@...>
Date: 2010-08-09T00:59:22+09:00
Subject: Re: Hel;p with Tip Calculator

On Mon, 9 Aug 2010 00:46:29 +0900
Hd Pwnz0r <human.dictionary@rocketmail.com> wrote:

> puts "What is the total?"
> input = gets.chomp.to_i
> puts "What percent do you want to tip?"
> input2 = gets.chomp.to_i
> percent = 100
> tip = input2 * input * 0.01
> puts "You should tip $#{tip}"
> 
> This is a tip calculator. I want it to work if the person enters $45
> or 15%.
> 
> Right now, it would only return 0 because they are invalid numbers. It
> would only work with an input of 15 or 45. I have really no clue how
> to do that.

Use

'45 %'.sub(/%/, '').strip
'14 $'.sub(/[$]/, '').strip

for that.

"strip" can remove unwanted trailing and leading blanks.
"sub" substitutes the charachters in the RE with an empty string
removing them.

Regards,
Andrei