Hi Alex, > Am 19.08.2017 um 16:57 schrieb Alex Tweedly via use-livecode > <use-livecode@lists.runrev.com>: > > Hmmm - you haven't mentioned how much data you're working with.
not sure, but definitively less than 5000. > Using lineoffset() to check for duplicated keys will make you (relatively) > slow on large data sets, since it is O(n**2). I made little test and it is fast enough for my purpose. :-) > Since you know that item 2 is not empty, you must also know that the whole > line is not empty :-), > so you can simply check for that. > > put empty into Array > repeat for each line tLine in tData > put item 2 of tLine into tKey > if tKey = EMPTY then next repeat > # if tArray[tKey] is EMPTY then > put tLine & CR after tArray[tKey] -- or would 'into' be even faster > than 'after' ?? ## I need AFTER, since I want to collect all lines with the same item 2 in that key. ## So no need for this IF clause in my case. > # end if > end repeat > > Alex. Best Klaus -- Klaus Major http://www.major-k.de kl...@major-k.de _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
