I was surprised to find that Integer class>>#readFrom: returns 0 when it 
doesn't find an integer. So, (Integer readFrom: 'abc' readStream) = 0 is 
true. This seems wrong to me although it's consistent with the method 
comment and VisualWorks. I was expecting an error. What's the reasoning 
behind this?

I'm looking for the Smalltalk equivalent of:

try {
   Integer.parseInt("abc");
}
catch (NumberFormatException e) {
   // do something
}

I found SqNumberParser which appears to be what I want:

(SqNumberParser on: 'abc')
	nextIntegerBase: 10
	ifFail: [self doSomething]

This works but, is it the right / good way?

Does the Sq prefix mean this parser is expecting Squeak format numbers? 
If so, what is this format?

Also, how is this done in other smalltalks?

Thanks,
Zulq.