StrFilter(): verwijder ongewenste tekens uit een string

Sectie: FoxPro
Auteur(s): Guus Endeveld
Publicatiedatum: 19-3-2006
Keywords: Visual FoxPro
Type bijdrage: Tip
Taal: Nederlands
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* Example:
* Make sure a string only contains digits:
*   lcString="AbcZyx:*/+ 2345PC-ABCD"
*   ? chrtran(lcString,chrtran(lcString,"1234567890",""),"") && returns 2345
* The inner chrtran() evaluates to a string that contains all of the non digit characters.
* The outer chrtran() uses that as the mask to remove all of those characters leaving only the digits.

lparameters lcString,lcCharsToRetain
return chrtran(lcString,chrtran(lcString,lcCharsToRetain,''),'')

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