On 21/07/09 19:25, Ben Fritz wrote:
>
>
>
> On Jul 21, 12:01 pm, Ben Fritz<[email protected]> wrote:
>>
>> I need to stop trying to multitask before I make myself look like more
>> of an idiot.
>>
>> [snip]
>>
>> Zero evaluates as false and a
>> non-empty string evaluates as true, so just check the value before you
>> use it.
>>
>> You'll need an additional "return 0" within your catch, but the rest
>> of the function should "just work".
>
> Ugh, so much for the "not looking like an idiot".
>
> This would work, except:
>
> a) In Vim, unlike Perl, apparently non-null strings DON'T evaluate to
> true (is this documented anywhere? I can't find it if it is!)
> b) you weren't returning a string anyway.
A string which begins with a decimal number, or with 0 then an octal
number, or with 0x or 0X then a hex number, evaluates as that number.
Any other string evaluates as zero.
When evaluating as a Boolean, it is first converted to a Number. Then
zero counts as FALSE and anything else counts as TRUE.
This is documented about one page below ":help variables".
>
> Returning 0 should still work, but check that type(project) == type
> ({}) for your sentinal, rather than checking for true/false of the
> value itself.
This checks for a Dictionary. To test for a string, use type('').
(Using a Dictionary as if it were a Number doesn't work, it throws an
exception. Using a String as a Number does work, as above.)
Best regards,
Tony.
--
Oh, I don't blame Congress. If I had $600 billion at my disposal, I'd
be irresponsible, too.
-- Lichty & Wagner
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