From: Mike Stok <mike@...>
Date: 2007-08-27T05:38:27+09:00
Subject: Re: Strict conversion of strings to ints?


On 26-Aug-07, at 4:32 PM, James Edward Gray II wrote:

> On Aug 26, 2007, at 3:26 PM, Kenneth McDonald wrote:
>
>> The real problem is:
>>
>> irb(main):002:0> "12,345".to_i
>> => 12
>>
>> Basically, Ruby converts anything that starts with an int, which  
>> is really quite nasty in a case such as the above. I spent a lot  
>> of time tracking down that problem.
>>
>> So, I want an integer conversion function that throws an error if  
>> the _entire_ string can't be interpreted as an integer; the Ruby  
>> analog to the standard string-to-int conversion function in most  
>> other languages.
>
> raise "Bad integer" unless i_str =~ /\A-?\d+\z/

What about

   int = Integer(i_str)

?

It accepts leading whitespace, but apart from that it's pretty picky.

Mike

-- 

Mike Stok <mike@stok.ca>
http://www.stok.ca/~mike/

The "`Stok' disclaimers" apply.