What is the difference between a ' and a " ?
briany at qldlearning.com
Fri Jun 25 22:03:24 CDT 2004
A few things that might help a little:
> If you set explicitVars to TRUE, you'll get compile errors anytime
you try to quote something with a single quote, because it will look
like an undeclared variable. Caveats: you'll have to declare all of you
variables, and problems have been reported with the IDE running with
explicitVars turned on. This might have to wait until the IDE is
offficially explicitVars- safe, but last I checked RunRev was working
hard on it.
> numToChar() and charToNum() have been known to carry people on
chases, because of the non-obvious behavior: if you pass more than one
character charToNum() it will just report on the first character of the
string (in this case, your single quote). Looks like maybe you already
figured this, but it's one of those weird things that I've seen people
> If you make a habit of repeating string literals as little as
possible (i.e. declaring constants or storing the values into variables
early on) you'll probably find that you don't type them that often in a
context that doesn't cause an error. If you are building literal
strings with quotes, there's also the "quote" constant.
Dunno how much that helps, but hopefully a little!
> I've just spent a long time puzzling over a stupid bug of mine.
> I had written something like
> put (numToChar( charToNum('a') + something)
> not knowing that 'a' is different from "a"
> But even now that I know it, I can't find anything in the documents to
> explain what 'a' does mean.
> Any clues for me, please ?
> I suspect this will be a common mis-type for me in the first couple of
> months - so any way to make single quotes cause an error/warning would
> be helpful.
> -- Alex Tweedly.
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