I can add but I can't subtract!

[bjb007]

I can

add 1 to field lblXXX

but how do I subtract 1?

Tried adding (-1) and got a raspberry from Rev.

Can't find anything like

field lblXXX = field lblXXX -1

or

field lblXXX -=1

[malte]

Hi,

again, script would be helpful.

--
on mouseUp pMouseBtnNo
local myVar
put 5 into myVar
add (-1) to myVar
put myVar
end mouseUp

subtract 1 from myVar

put myVar -1 into myVar

Many choices...

[malte]

Just checked the transcript dictionary...


subtract is nicely linked from add

[bjb007]

I think I failed every mathematics exam I
ever took so you shouldn't be surprised
that I didn't look for "subtract".

Not the usual way in programming.

As I said before I look for something familiar
like += and -+.

And on top of all that it's 8am in Melbourne
and I haven't gone to bed yet.

[malte]

The hardest part about learning Rev if you have previous (non hypercard) programming experience, is to unlearn the things you already know. I agree there should be better documentation for potential switchers from other languages, where syntactic differences like those are covered.

All the best,

Malte

[paul_gr]

In most of the dictionary pages, there is a "See also ..." list of related functions.
These are hyperlinked (although it isn't obvious) to the relevant page.
It also pays to think in terms of a word rather than a symbol, ie think "add"instead of +.
I really miss things like i++,+= and -=, but you've got to go with the flow

cheers
Paul

[bjb007]

The add and subtract were in V1 but one would expect
that some more usual version would have been added
by now.

Although Rev is a nice language to use it never seems
to be well maintained or updated.

Anyway it's better than C or C++ which are a big
joke.

[JeremyR]

Your "usual version" is judged coming from your lack of background in xtalk languages. I don't mean to be harsh, but from all your posts you are wanting revolution/xtalk to be c/c++.

Basically your asking for xtalk to take away the one thing that makes it stand out from the "usual" programming languages, its english-like syntax (or readability in other words).

[Klaus]

Well put, Jeremy