Re: [Jscheme-devel] string->number

[Ken A. <kan...@bb...>]

I'm glad we have people like Alexander helping us design JScheme.
I've changed the code so that (string->number "010") -> 10.
If you need to read java literals use string->expr.

k

At 11:24 AM 6/7/2004 -0400, Geoffrey Knauth wrote:
>On Jun 7, 2004, at 10:44, Timothy John Hickey wrote:
>>This little issue actually goes to the heart of JScheme since what is u=
nique about Jscheme is the tight
>>integration with Java and that integration is made possibly by our deci=
sion to adopt the Java primitive types
>>as the Scheme base types. The Java literal syntax is then essential to =
making JScheme integrate smoothly with
>>Java.
>
>This is a worthy goal.  I certainly remember how impressed I was when th=
e first Java language and VM specs came out, so painstakingly developed. =
 But then even Java has warts, for example:
>
>"How Java=92s Floating-Point Hurts Everyone Everywhere"
>http://www.cs.berkeley.edu/~wkahan/JAVAhurt.pdf
>
>Principle of Least Surprise ... What is more of an unpleasant surprise?
>1.  (string->number "08") =3D> 8
>2.  (string->number "08") =3D> #f
>3.  (string->number "010") =3D> 10
>4.  (string->number "010") =3D> 8
>
>My feeling is that anyone who wants octal interpretation won't mind sayi=
ng so:
>(string->number "010" 8) =3D> 8
>
>Good morning, Alexander.  How old will you be next year?
>   010
>I see you entered a leading zero.  You're too clever.  I wasn't expectin=
g that.  Like many 7 year-olds, I bet sometimes you wish you were 10.
>
>Geoffrey
>--
>Geoffrey S. Knauth | http://knauth.org/gsk
>
>
>
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