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Re: [mv] Flustered with [if]
****** message to minivend-users from Mike Heins <mikeh@minivend.com> ******
Quoting Nick Pleis (npleis@saratogaweb.com):
> Hey,
>
>
> The biggest single problem i've had with minivend has been getting the various IF's to work properly. (i've been at this about a year now)
>
> The documentation makes very little sense to me..can someone explain to me the semnatics of the IF statement?
>
> It seems to me if I have a scratch variable (call it "mv_var") set to "test" and do:
>
> [if scratch mv_var eq "test"]
> that should work..
> or at leaset
>
> [if type=scratch term="mv_var" op="eq" compare="test"] should..but neither do..or sporadically at best. The biggest problems are in string comparisons. Numeric comparisons seem to always work flawlessly (IE setting the same variable to 1 and doing : [if scratch mv_var == 1] will return the right result). I find myself resorting down to perl for this more and more....
>
> Sorry, i'm just a bit frusturated after fighting this yet again for far to long tonite.
>
I can tell you the tests are done the same way every time. There are
enough catalog implementations around to prove that.
IF you are going to use "eq", which I almost never do, then you have
to make sure there is not trailing/leading whitespace. Do you use a
word wrapping editor? People who do have problems with MV sometimes.
PICO is an absolute abomination as a programmers editor, as are any
of which willy-nilly wrap text.
Much better is to do something like:
[if scratch var =~ /^\s*test\s*$/i]
Yes.
[/if]
which removes those problems.
--
Akopia, Inc., 131 Willow Lane, Floor 2, Oxford, OH 45056
phone +1.513.523.7621 fax 7501 <heins@akopia.com>
Research is what I'm doing when I don't know what I'm doing.
-- Wernher Von Braun
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