Case sensitivity in Livecode ??
Mark Waddingham
mark at livecode.com
Tue Jun 7 03:18:06 EDT 2022
On 2022-06-01 19:54, Alex Tweedly via use-livecode wrote:
>> Also, you'll be able to do things like:
>>
>> constant kPiBy2 = pi / 2
>> constant kPiBy2Squared = kPiBy2 * kPiBy2
>> constant kPiBy2String = format("%f", kPiBy2)
>> local sPiMap = { "pi-by-2": kPiBy2, "pi-by-2-sq": kPiBy2Squared }
>>
> Very good. In fact, great !! Thank you!
>
> Would you be ale to do something like
>
> constant kPiMap = { ... as above ... }
Yes - the initializers in both constant and local keywords are the same
- both can use arbitrary constant expressions (any local properties are
assumed to be the default values when evaluating).
> And now I'll push my luck and ponder the possibility of 'global'
> constants.
Haha...
> OK - 'global constant' is likely counter to the scope concepts. But
> perhaps they could be done as "write-once" variables, or as a more
> general "write-protected' variable.
>
> put 17 into gkMyMagicValue
> writeprotect "gkMyMagicValue"
>
> and any *subsequent* attempt to change the value would fail.
How is that any better than putting something like this in a library or
back script:
function gkMyMagicValue
return 17
end gkMyMagicValue
Including the global declaration its the same number of lines (indeed
less, as you'd need to put a global declaration in every script which
wanted to use said global constant...).
Warmest Regards,
Mark.
--
Mark Waddingham ~ mark at livecode.com ~ http://www.livecode.com/
LiveCode: Everyone can create apps
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