andchr()

andchr(<string>, <characters>[, <each once>])
orchr(<string>, <characters>[, <each once>])
xorchr(<string>, <characters>[, <each once>])
notchr(<string>, <characters>[, <each once>])

Test which of <characters> appear in <string>, and return 1 or 0.

andchr(): all of them do. It returns 1 when <characters> is empty.
orchr(): at least one does.
xorchr(): exactly one does.
notchr(): none do.

Each character of <string> matches only one of <characters>, so a character listed twice must appear twice. When <each once> is a nonzero number, each of <characters> is found if <string> holds it at all. Case matters, and colour is not compared.

These functions come from RhostMUSH.

> think andchr(abc,ca) andchr(abc,aa) andchr(abc,aa,1)
1 0 1
> think xorchr(abc,ax) orchr(abc,xyz) notchr(abc,xyz)
1 0 1

Output: aa needs two a’s unless <each once> is given.

::: seealso

strmatch()
numpos() :::