On 08/11/2017 02:24 AM, Mark Waddingham via use-livecode wrote:
Not quite on topic for the thread, but this interested in me in terms of
- what are the use cases?
Somewhat similar to Ralph's use cases, this paradigm comes up quite
often in my code. Probably the most common case is where I want the
performance of a 'repeat for each' loop but don't have a proper iterator
to use, so I have to use a doppelganger. Examples here from actual
working code:
case 1:
setting up an array of constants:
put 0 into tCount
repeat for each item tConst in tConsts
put tConst into tArray[tCount]
add 1 to tCount
end repeat
case 2:
iterating through a cr-separated list and needing to modify lines
(note: this is even more extreme if I need to delete lines):
put tBreaks into tNewBreaks
put 1 into tLine
repeat for each line tBreak in tBreaks
put item 1 of tBreak into tID
put the long id of control id tID of the topstack into tObjectID
put tObjectID into item 1 of line tLine of tNewBreaks
add 1 to tLine
end repeat
return tNewBreaks
case 3:
parsing data and needing an iterator:
command SetVarFieldColors pFieldName
local x
put 1 into x
set the itemdelimiter to tab
repeat for each line tLine in field pFieldName
switch item 3 of tLine
case "C"
set the forecolor of item 2 to 3 of line x of field pFieldName
to sDebugColors["declarations"]
break
case "P"
set the forecolor of item 2 to 3 of line x of field pFieldName
to sDebugColors["parameters"]
break
default
break
end switch
add 1 to x
end repeat
end SetVarFieldColors
--
Mark Wieder
ahsoftw...@gmail.com
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