On 17/02/09 19:15, Larson, DavidX S wrote:
> Hello all,
>
> I was working on my script when I ran across this unexpected behavior with
> the "if" statement. The doc says:
>
> :if {expr1} *:if* *:endif* *:en* *E171* *E579* *E580*
> :en[dif] Execute the commands until the next matching ":else"
> or ":endif" if {expr1} evaluates to non-zero.
>
> I thought that meant that if {expr1} evaluated to anything other than zero
> (such as a string) then the "if" statement passes, but it doesn't. It's
> simple enough to reproduce:
>
> if "atoehu"
> echom "pass"
> else
> echom "fail"
> endif
>
> Always echo's: "fail".
>
> Is the bug in the doc, vim, or in my head? I have version 7.2.106.
>
> Cheers,
> David
If {expr} is a Number, zero means "true", anything else means "false".
If {expr} is a Float, a List, a Dictionary or a Funcref, the if
statement has a syntax error.
If {expr} is a String, it is first converted to a Number according to
the rules explained about one page or so below ":help variables", under
"Conversion from a String to a Number". This means that if the String
starts with the string representation of a nonzero number it evaluates
to TRUE, otherwise to FALSE. "atoehu" will give you "fail" but "12345"
"0xEDCB" and "0377" will give you "pass".
Best regards,
Tony.
--
It is illegal to rob a bank and then shoot at the bank teller with a water
pistol.
[real standing law in Louisana, United States of America]
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