@KEEP -- the inverse of @STRIP

[dcantor]

function keep=`%@strip[%@strip[%1,%2],%2]`


E.g., strip everything but digits; i.e., keep only the digits:
> echo %@keep["0123456789",lskjfow68768;lk;l]
68768

Keep only the vowels:
> echo %@keep["aeiou",%@reverse[abcdefghijklmnopqrstuvwxyz]]
uoiea

Dave C.

 

[samintz]

nifty

 

[Charles Dye]

Goin' stir crazy....

 

[dcantor]

Thank you, Charles. Maybe you'll include that in TEXTUTILS.

 

[Charles Dye]

Thank you, Charles. Maybe you'll include that in TEXTUTILS.

I could, sure. But as it's (A) a reasonable idea, and (B) easy to implement, I think it's quite likely Rex will do it in the next version.

 

[vefatica]

I could, sure. But as it's (A) a reasonable idea, and (B) easy to implement, I think it's quite likely Rex will do it in the next version.

Could, probably easily, overload @STRIP with a third, optional, parameter ([,-]) reversing the sense (strip/keep) of the first parameter.

 

[Rick Reinckens]

Could, probably easily, overload @STRIP with a third, optional, parameter ([,-]) reversing the sense (strip/keep) of the first parameter.

But then ... a stripper isn't necessarily a keeper ...