On 2017-08-10 19:38, Ralph DiMola via use-livecode wrote:
To make this even more flexible:
repeat for each line tLine in tLines with [counter] tIndex [start]
[{1}|x]
[step] [{1}|y]
end repeat
Not quite on topic for the thread, but this interested in me in terms of
- what are the use cases?
The common code pattern we see as justification for 'repeat for each
line tLine and index tIndex in tLines' is that it allows you to use the
efficiency of iteration over a primary container, whilst still retaining
the index of the chunk being iterated over. i.e.
put 0 into tIndex
repeat for each line tLine in tContainer
add 1 to tIndex
if tLine is not line tIndex of tContainer then
answer "Oh dear - something is *really* wrong"
end if
end repeat
So an extension to the syntax with 'index' means you get both pieces of
information and a good amount of duality which justifies its existence.
In what kinds of situation do you find yourself wanting an offset index,
relative to the index of the iterated chunk?
Warmest Regards,
Mark.
--
Mark Waddingham ~ m...@livecode.com ~ http://www.livecode.com/
LiveCode: Everyone can create apps
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