Topic: Remove double backslash from string?

[mgreven]

Hello,

Maybe i ask a stupid question, but is there a way to replace double backslashes in a string?

I am getting a result from the Filefind routine "C:\\TEMP\\temp.txt" which i want to transform into "C:\TEMP\temp.txt".
I tried it with the vl-string-subst command but i cannot give a single "\" to the routine?

Regards,

Marco

[Lee Mac]

In LISP (and other languages), the backslash is used as an Escape Character to give a sequence of characters an alternative meaning, e.g.:

Code: [Select]

"\n" = new line character
"\t" = tab character
"\r" = carriage return
...
Hence, to display a literal backslash you need to mark it as a literal by prefixing it with another backslash ("\\").

This means that a double backslash in LISP is interpreted as a single backslash.

Consider this example program:

Code - Auto/Visual Lisp: [Select]

1. (defun c:test ( / str )
2.     (setq str (getstring t "\nEnter a String with some Backslashes: "))
3.     (princ "\nString in LISP format: ")
4.     (prin1 str)
5.  
6.     (princ "\nString when printed:    ")
7.     (princ str)
8.     (princ)
9. )

To demonstrate:

Code: [Select]

Command: test

Enter a String with some Backslashes: a\b\c

String in LISP format: "a\\b\\c"
String when printed:   a\b\c

[mgreven]

Thanks for your respons...