[ANN] LiveCode List Processor

[Mark Waddingham]

On 2015-10-12 19:46, Richard Gaskin wrote:
> I've never seen question marks in handler names in any xTalk I've ever
> used, so I figured perhaps it might be something specific to Builder.

It's a standard convention in some languages (Scheme springs to mind) to 
indicate a 'predicate' - a function which returns true or false.

I've seem some LiveCode Script libraries in the past use it - although 
not very many.

> If allowable, is it desirable?  I suppose it's a matter of taste if it
> doesn't break anything, but given how uncommon it is I'd wager an API
> for others to use could benefit from conventions developers might
> anticipate.

Well the identifier token in LiveCode Script has always been very 
forgiving. However, in that does lie a problem - it restricts what 
operators could be added in the future (which is fine as long as the 
goal of the language is to avoid as many 'symbols' as possible).

To be fair '?' poses less of a problem in this regard than '.' - in 
terms of limiting future options that have been discussed at length in 
the past ;)

Certainly, we (at LiveCode) only use handler names using alphanumeric 
characters and '_'.

Warmest Regards,

Mark.

-- 
Mark Waddingham ~ mark at livecode.com ~ http://www.livecode.com/
LiveCode: Everyone can create apps