allowing value evaluations as statements
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- Subject: allowing value evaluations as statements
- From: askok@...
- Date: 2007年1月01日 04:56:59 +0200
A perl-ish way of making error checking, but neat and
effective:
_= nsfm:fileExistsAtPath(testfile)
or error "File doesn't exist!"
_= nsfm:copyPath( testfile, newfile )
or error "File copy failed!"
Currently, Lua does not allow leaving the "_=" away, since
that would make these commands and commands don't have a
value ('or' gives this a value).
In my opinion, evaluation results could be allowed even if
the value is not stored anyway. In a way, they would have
a "drain" that eats up the value.
I do know that by a function this can be overcome, but the
neaty is to have the essential thing first (the command),
and ability to switch on/off the error check by simply
commenting that out. Anyways, this is caused by my
exposure to perl lately, it does show. Perl has a lot of
those thisandthat or die things.. Which I actually
like(d).
-asko