On 2018-08-04 21:00, Richard Gaskin via use-livecode wrote:
Mark Waddingham wrote:
Yes - so come up with LCS handlers which do that, share them, let's
work together to make them as efficient in LCS as possible and then
see what we can do in the engine to improve their performance (which
I'm guessing is as much the purpose for the proposition as the
syntax).
It is, primarily. The minor convenience is nice too, but you know how
much I love to see performance enhancements in the engine.
As for implementation, Mark Wieder's looks good:
http://lists.runrev.com/pipermail/use-livecode/2018-August/248862.html
One important point here (which I think is something which is often
overlooked in LC as it is just something we deal with implicitly case by
case)...
In your use-case for 'valueDiff' - do you need to tell the difference
between a key value being the empty string and a key value not being
present at all?
[ i.e. using an array key absence to emulate 'nothing': meaning you are
actually storing nothing or a value (even the empty string). ]
It might seem like a minor detail, but does change the operation
somewhat (and potential implementations).
Warmest Regards,
Mark.
--
Mark Waddingham ~ m...@livecode.com ~ http://www.livecode.com/
LiveCode: Everyone can create apps
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