Zero/empty

[Peter Haworth]

I think you nailed it Mike.  I simplified my post a bit.  I'm actually
testing a parameter to a function not a variable and the call to the
function does not pass the parameter.  In other words:

put myFunction(p1) into whatever

function myFunction p1,p2
  if p2 is not zero…..
end myFunction

This reminds me of the days when "unitialised variable" was the source of
many a happy hour of debugging!  Hadn't come across the need to initialise
variables in LC but this looks like one.

Pete
lcSQL Software <http://www.lcsql.com>



On Tue, Sep 11, 2012 at 10:56 AM, Mike Bonner <bonnmike at gmail.com> wrote:

> There are some quirks I found on testing this.
>
> This evaluates to false
>
> local tvar
>
> --put empty into tvar
>
> put (tvar is not zero)
>
>
>
> This evaluates to true
>
> local tvar
>
> put empty into tvar
>
> put (tvar is not zero)
>
>
> So it seems a declared var that has had nothing done to it sees itself as
> empty and zero. If you put empty into it, then it is not zero.  Cool huh?
>
> On Tue, Sep 11, 2012 at 11:47 AM, Peter Haworth <pete at lcsql.com> wrote:
>
> > Just ran across a little oddity.  The statement "if tVar is not zero"
> > evaluates to false if tVar is empty.  Apparently empty and zero are
> treated
> > the same for comparison purposes?
> > Pete
> > lcSQL Software <http://www.lcsql.com>
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