Reduce String length by a certain number of characters

[jmcshane]

Hi

Is there a way to reduce a string length to a user specified number of characters using Visual Lisp?

Example Reduce “ABCDEFGH” to “DEFGH”

With the user specifying how many characters to trim?

John

[ccowgill]

Hi

Is there a way to reduce a string length to a user specified number of characters using Visual Lisp?

Example Reduce “ABCDEFGH” to “DEFGH”

With the user specifying how many characters to trim?

John

yes,
you can use:

(setq number (getint "\nSpecify number of characters to trim\n"))
(substr "ABCDEFGH" number)

Havent tested, but Help says that is the proper syntax

[jmcshane]

That's exactly it.
Something so simple.

Many Thanks

John

[irneb]

If you want to trim from the end of the string (instead of the start), then this should work:

(setq str "ABCDEFGH")
(substr str 1 (- (strlen str) number))

[jmcshane]

Thanks Irneb,

I was trying all this vl-string-trim left and right and forgot all about the simple substr command.

I got it to work in the end anyway.

Many thanks

John

[irneb]

You're welcome!

I can understand your reasoning ... having programmed in several other languages, when I 1st saw it I also thought string-trim aha!

Although the AutoLisp (or rather VisualLisp) vl-string-trim is more like a string cleanup than a trim. Thankfully it is explained in the help though .

[jmcshane]

Help???????


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