String functions

I have been working on revising the string functions
lately. Names like 'left', 'right', and 'index', have
been bugging me since I started using lush. Here is a
summary of the current state:

? ^Astr-
Search Results for: str-
   1. (str-cat  <s1> ... <sn>)
   2. (str-mid  <s> <n> [<l>])
   3. (str-right  <s> <n>)
   4. (str-left  <s> <n>)
   5. (str-insert <s> <n> <s1>)
   6. (str-subst <s> <s1> <s2>)
   7. (str-del <s> <n> <l>)
   8. (str-join <unsep> <ss>)
   9. (str-split <s> <sep>)
  10. (str-startswith <s> <prefix>)
  11. (str-endswith <s> <suffix>)
  12. (str-find <s> <r> [<n>])
  13. (str-val <s>)
  14. (str-strip <s>)
  15. (str-stripl <s>)
  16. (str-stripr <s>)
  17. (declare (-str-) <var1>...<varN>)
choice>

There are also two new functions 'string-to-vector'
and 'vector-to-string', which do the obvious.

For string functions that take position arguments
(str-mid, str-del, str-insert), those are now zero-based
to bring string indexing in line with array indexing.
(Something to keep in mind when you port your code to
lush2).

You may also index strings directly,
? ("abcd" 0)
= 97
? ("abcd" 1)
= 98
?

and get the character code.

There is still no unicode support, however.

Ralf


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