Folks:
I think there is something weird about "offset". This occurred on version 6.5
and now on 6.6.
First off, the documents say:
"the charsToSkip is a non-negative integer. If you don't specify how many
charsToSkip, the offset function does not skip any items and starts at the
beginning of the stringToSearch."
Note the use of the word "items". Skipping characters vs skipping "items" is a
different matter. In the revdocs that are online, the definition of
"characters" to skip is correct.
But, that's not the end of the story. Offset does not appear to be working
correctly anyway.
If I run the script:
put "abcdefgabcccablmnopoq" into theChars
put offset("c",theChars)
I get: 3, which is correct
If I do:
put "abcdefgabcccablmnopoq" into theChars
put offset("c",theChars,3)
I get 7. ??? What the heck? It looks like it returns (the number of characters
to the search char) - (# to skip).
But, if I do:
put "abcdefgabcccablmnopoq" into theChars
put offset("c",theChars,7)
I get: 3
So, something is very wrong with the offset command. I worked around this in a
parsing script by always not skipping any characters, then after I found the
first instance, deleting the characters I wanted to skip before the next offset
invocation.
Seems like a bug to me. What do you think? Or is it only my system? Or is the
use of the offset function some convoluted logic that's different from most
other implementations of an offset function? What do I know? I'm new to
Livecode.
Best,
Bill
William Prothero
http://es.earthednet.org
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