W-Language IsNumeric(..)

Hi,

recently, I mistook the W-Language command IsNumeric(..) as a function which is looking for a string being completely numeric. It is not! IsNumeric(..) simply looks whether Val(string) would return some / any numeric value. So, IsNumeric("71O00") will return True though there's a typo in it: a zero has been mistyped as an uppercase O.

Testing whether a string consists of numerics only or uppercase alpha characters only has to be done by your own functions, there's no W-Language function for it.

Test project: [www.windev.at]

Have fun!
Guenter

Hi Guenter,

i think the zero / O is not the reason. If the first character is a letter then isnumeric = false, if the first character is a digit then isnumeric = true

isnumeric("123xyz") = true isnumeric("xyz123") = false
val("123xyz") = 123 val("xyz123") = 0

Have fun!
Christoph

Jimbo san,
what about using regular expressions.. A simple example :

FUNCTION IsUnsignedInteger(LOCAL sNum is string)
RESULT MatchRegularExpression(sNum,  "[0-9]+" )

untested... Björn

Quote
BLS
Jimbo san,
what about using regular expressions.. A simple example :

FUNCTION IsUnsignedInteger(LOCAL sNum is string)
RESULT MatchRegularExpression(sNum,  "[0-9]+" )

untested... Björn

Hey Bjoern, that's a very good idea! I'll try it!

Next problem is Upper(..) - I'll discuss that one today or tomorrow .. Upper("äöü") gives "AOU" as a result, not "ÄÖÜ" as it should. OK, there's a special case in German: "ß". It should be changed to "SZ" in Upper(..). Of course, Upper(..) currently works with all French accented characters. The "AOU"-result is already a 'repaired' version of Upper(..) .. omg! Upper(..) doesn't work since WD 5.5. I'll use a table-driven approach to give a chance to all languages.
Kind regards, Guenter

JImbo san,
In case that you are interested in a ansi,utf8, ... string functions -upper() lower()- isnumeric() etc. library, let me know.
This lib. is written in D as DLL including a set a WD procedures which call these DLL functions.... contains also a ECMA conform. regex engine...

regex match
regex replace
+ outstanding regex stuff
takes about a week, have to wait for a D compiler update.
Björn

Could not resist
the DLL also contains :
regex split
regexSplit() is used to split a string based on a regular expression and return the result as comma separated string.
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invoking WD callback functions is also possible
Björn