[plt-scheme] Re: Text-contents to a function variable

Try (string->number "a")


On Jan 12, 2010, at 8:23 PM, Avi wrote:

> Ok, this is very useful (really shows how much I know), But how would
> I plug this into a function? I tried defining a letter as the
> numerical value of a string, but it did not work very well, maybe
> there are better methods?
> 
> On Jan 12, 6:37 pm, Thomas Chust <ch... at web.de> wrote:
>> 2010/1/12 Avi <n4alp... at gmail.com>:
>> 
>>> How would I turn the contents of a text-box or multiple text-boxes
>>> into a numerical variable or variables for a function?
>> 
>> Hello,
>> 
>> using string->number would be an obvious option.
>> 
>> On a side note, I think it is potentially misleading to talk about
>> "turning [something] into a numerical variable". A program can turn
>> *values* of one type into values of another type, but *variables* are
>> no first class values in Scheme, but rather named locations holding
>> values. Speaking about turning anything into a variable only really
>> makes sense in the context of code transformations, for example when
>> discussing program design or when looking at code that is part of a
>> compiler.
>> 
>> Ciao,
>> Thomas
>> 
>> --
>> When C++ is your hammer, every problem looks like your thumb.
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