From: Ross Bamford <rosco@...>
Date: 2005-12-22T21:32:59+09:00
Subject: Re: String > Integer Conversion Problem

On Thu, 22 Dec 2005 04:20:04 -0000, James Edward Gray II  
<james@grayproductions.net> wrote:

> On Dec 21, 2005, at 6:13 PM, Jacob Fugal wrote:
>
>> On 12/21/05, Timothy Hunter <cyclists@nc.rr.com> wrote:
>>> The Integer() method raises ArgumentError if given an empty,
>>> non-numeric, or otherwise non-well-formed string.
>>
>> On 12/21/05, James Edward Gray II <james@grayproductions.net> wrote:
>>> if ARGV.all? { |n| n =~ /\A\d+\Z/ }
>>>    puts "Usage..."
>>>    exit
>>> else
>>>    one, two = ARGV.map { |n| Integer(n) }
>>> end
>>
>> So could we rewrite this as:
>>
>> begin
>>   one, two = ARGV.map{ |n| Integer(n) }
>> rescue ArgumentError
>>   puts Usage
>>   exit
>> end
>
> Yeah, that's better.  Neither of our versions checks the number of  
> arguments though and we probably should...
>

I'm just wondering, in Java it's a bit of a no-no using exceptions like  
this (since they're pretty heavy to put together). Is it the case in Ruby?  
And does that regexp match balance it out anyway?

-- 
Ross Bamford - rosco@roscopeco.remove.co.uk