filtering non-alphanumeric chars in processing

[Bruce Easton]

Yeah, that was one option I was considering and may yet test for runtime 
efficiency.  The requirement turned out to be a little different in the 
end though.  What was needed was not squishing, but to replace the 
non-alphanumeric with a space as it gets fed to the output string. For 
now, I'm testing with a simple edit assignment:

Then:  an(1,alnum)=x
Then:  x=an      'should get original char (even if space), or space 
from edit failure

Bruce

On 2/26/15 1:35 PM, Scott Nelson wrote:
> Test each character for it's ascii value v the desired range:
>
> ::l="'1"
> loop:l eq "100":end
> ::c=mid(f,l,"1");d=asc(c)
> :(d ge "48" and d le "57") or (d ge "65" and d le "90") or (d ge "97" 
> and d le "122"):   do something to keep this digit
> :::  or do something else
> :::l=l+"1";goto loop
>
>
> Scott
>
>
>
>
> On 02/26/2015 12:03 PM, Bruce Easton wrote:
>> I need to filter out (squish out) non-alphanumeric characters from 
>> small array-element strings in processing for a large amount of data.
>>
>> Since I am already having to, for other purposes form each string 
>> character by character, I'm wondering which might be more efficient 
>> at runtime (or if there would even be any noticeable difference).
>>
>> For each character, I could test its inclusion in the desired ascii 
>> range using the asc() function;
>> or for each, I could set an "okstring" to "0123...9abc...z" and then 
>> test if the char is contained in said okstring;
>> or for each, I could apply the char to a dummy with the alnum edit 
>> and then test if the dummy is left blank.
>>
>> Just wondering out loud.  I haven't tried any of these against a 
>> large data set - but ultimately this will be used for such, so I 
>> should soon know.  I have a feeling testing against the edit result 
>> might be the most efficient.
>>
>> Bruce
>>
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