Reverse a list
J. Landman Gay
jacque at hyperactivesw.com
Sun Feb 8 16:52:26 EST 2015
Just tinkering around on a lazy Sunday, and I thought I'd come up with a
neat way to reverse a list without using the traditional clunky method:
function reverseSort pList
repeat for each line l in pList
put l & cr before tList
end repeat
return tList
end reverseSort
One of the best things I learned from a past LC converence came from
Jerry Daniels who said "let the engine do it." It's almost always faster
and more efficient. With that in mind I wrote this:
local sNum
function reverseText pList
put the number of lines in pList into sNum
sort lines of pList numeric by reverseSort(each)
return pList
end reverseText
function reverseSort pTxt
subtract 1 from sNum
return sNum && pTxt
end reverseSort
Works great and I was proud. Then I did some timing tests and found out
the two methods are very close to equivalent in timing, and on long
lists, the first way is actually faster.
So much for improving on LC's text chunking speed. Pah.
--
Jacqueline Landman Gay | jacque at hyperactivesw.com
HyperActive Software | http://www.hyperactivesw.com
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