[racket] tinyscheme vs. racket question

There is char->integer, but it produces the character's number in Unicode,
so #\1 would not map to 1.  You may be best off in that case with
(string->number (string ch)) for any character ch.

Carl Eastlund

On Mon, Sep 10, 2012 at 1:19 PM, Gregory Woodhouse <gregwoodhouse at me.com>wrote:

> Is there a similar function for characters? I.e., one that will map #\1 to
> 1?
>
> Sent from my iPhone
>
> On Sep 10, 2012, at 9:44 AM, Carl Eastlund <cce at ccs.neu.edu> wrote:
>
> The following expression should do what you want:
>
> (+ (string->number "1.2") 1)
>
> If you're starting from a symbol, use symbol->string before string->number.
>
> Carl Eastlund
>
> On Mon, Sep 10, 2012 at 12:41 PM, Nikolaus Klepp <dr.klepp at gmx.at> wrote:
>
>> Hi all,
>>
>> In tinyscheme I can do this:
>>
>> > (+ (string->symbol "1.2") 1)
>> 2.2
>>
>> In racket that does not work, because
>>
>> > (string->symbol "1.2")
>> '|1.2|
>>
>> which is not a number. I can use this workaround:
>>
>> > (+ (read (open-input-string "1.2")) 1)
>> 2.2
>>
>> But is there a clean way to get the above line from tinyscheme working on
>> racket without that workaround?
>>
>> Nik
>>
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