From: ts <decoux@...>
Date: 2003-11-17T10:23:27+09:00
Subject: Re: to_i

>>>>> "A" == Artur Merke <merke@ls1.cs.uni-dortmund.de> writes:

A> Is there a way to recognize if the conversion was successful? If
A> "0".to_i and "any string".to_i deliver the same result, I don't see how
A> this could be accomplished, without separately checking the syntax of the
A> given string.

 You have the method Integer to do this

svg% ruby -e 'p Integer("0")'
0
svg% 

svg% ruby -e 'p Integer("hello")'
-e:1:in `Integer': invalid value for Integer: "hello" (ArgumentError)
        from -e:1
svg% 

svg% ruby -e 'a = Integer("hello") rescue 12; p a'
12
svg% 


-- 

Guy Decoux