Jon wrote:
Brian:
Thanks for your comments. My problem was spending hours trying to
write a Flip routine, only to come across it by accident. There was
no clue that it existed from looking at the Image properties or
events. After this accidental encounter, I now feel as if I have to
learn every single detail before proceeding at all, which is daunting
and frustrating. Thus my comment that associating the "methods" with
the objects would have been a good idea. And if that was not possible
architecturally, at least document them somewhere.
And then I tried to do some string manipulations (change the string
<"FRED"> to the string <FRED>, that is, remove the quotes), and simply
gave up: there is no section on how to manage strings.
I know I'm coming from another programming environment, and I don't
expect it to be trivial, but when I can't find any information at all,
I get frustrated. I can't be the first one...
:)
Certainly not the first - see any email to this list from me between
about June and August last year (then note the gradual change over to
enthusiastic following that time :-)
The problem is that string manipulation is so well embedded into
Transcript that it can be hard to find - it's not a separate string
library like is in in some other places.
You could do any of (assuming the string is currently in variable "myVar")
1. replace quote by empty in myVar
2.
put empty into newVar
repeat for each char c in myVar
if c <> quote then put c after newVar
end repeat
3. Use reg expressions (too late at night to look up just how to do it
and include a code fragment)
4. Lots of other creative (but not so good) ways, that you might be used
to from other languages, such as
repeat forever
put offset(quote, myVar) > 0 into t
if t = 0 then exit repeat
delete char t of myVar
end repeat
and surely at least a dozen other ways.
In general when looking for string manipulation, you might be looking
for language constructs such as
- char, word, item (e..g char 3 to -5 of someVar)
- offset, itemOffset, etc.
- replace
- filter (if working with lines - and note that you can change the
lineDelimeter)
- regular expr (matchText, etc)
- etc.
When in doubt - ask. This list is pretty busy (and I've spent today
adding clutter to it :-), so an extra question or two isn't a problem,
and you'll usually get the answer you need quickly; it may still be
frustrating, but it's worth it ...
--
Alex Tweedly http://www.tweedly.net
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