* new fn index
@ 1991-12-20 1:40 DaviD W. Sanderson
0 siblings, 0 replies; 2+ messages in thread
From: DaviD W. Sanderson @ 1991-12-20 1:40 UTC (permalink / raw)
To: rc
Well, I stuck out my neck and Chris showed me how to eliminate
even the one use of an external command. That'll teach me! :-)
#-------
# index - print the index of the given string in the given list.
# (0 if not there)
# If the string occurs more than once, the index of the last occurrence
# is printed.
#-------
fn index { # str list
str = $1 ans = () {
shift
while(~ $str $*)
{
#-------
# count in unary
# May as well keep track of what I'm shifting
# (perhaps it will be useful in a different
# version...).
#-------
ans=($ans $1)
shift
}
echo $#ans
}
}
index a (x y z) # 0
index a (a y z) # 1
index a (x a z) # 2
index a (ax y a) # 3
index '' (a '' b '') # 4
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: new fn index
@ 1991-12-20 2:17 Tom Culliton x2278
0 siblings, 0 replies; 2+ messages in thread
From: Tom Culliton x2278 @ 1991-12-20 2:17 UTC (permalink / raw)
To: dws; +Cc: rc
Make that while test
while (! ~ $str $1)
and you can find the first occurance
^ permalink raw reply [flat|nested] 2+ messages in thread
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