(Integer readFrom: 'abc' readStream) = 0
me at zulq.net
Wed Jan 9 11:44:03 UTC 2008
I hate to think how many times I've used #readFrom: without knowing this!
nicolas cellier wrote:
> Zulq Alam a écrit :
>> What's the reasoning behind this?
> Historically, readFrom: was mainly used from Parser (or Scanner) to read
> literal Number and only triggered by the presence of a digit character,
> in this context, reading from 'abc' would never have happened.
> Syntax error would have been handled by Smalltalk Compiler too (Parser),
> so no care was ever taken at readFrom: level.
> That's all what is behind.
> Our expectations and usage of readFrom: has evolved.
> However, I always preferred the power of Compiler evaluate: to its very
> restricted avatar Number readFrom:
> example of non smart readFrom:
> Number readFrom: '1+1'.
> Number readFrom: 'Float pi / 5 sin * 30'.
> Of course, you gotta trust your users then, not very secure...
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