Re: What is Best Method To Determine Duplicate Items in a Large List?
Re: What is Best Method To Determine Duplicate Items in a Large List?
- Subject: Re: What is Best Method To Determine Duplicate Items in a Large List?
- From: "Nigel Garvey" <email@hidden>
- Date: Sun, 13 Aug 2017 20:48:34 +0100
Shane Stanley wrote on Sun, 13 Aug 2017 21:52:13 +1000:
>On 13 Aug 2017, at 7:25 pm, Nigel Garvey <email@hidden>
wrote:
>>
>> This is essentially Shane's script, but simplified (and slightly
faster)
>
>I'll grant you simplified, and more elegant with countForObject:, but
I've
>run several comparisons of thousands of iterations of each, and the
figures
>all fall within about ±4%, and mostly ±1%. In fact, I've rarely seen
such
>consistent figures.
Yeah There's very little in it. Even leaving out the minusSet: stage
doesn't slow it down much.
>Of course real data could tip it one way or the other…
Speaking of which, if the items in the list aren't necessarily text,
your …
set end of indexInfo to {aDupe as text}
… could be …
set end of indexInfo to (current application's NSArray's
arrayWithObject:(aDupe)) as list
… and my …
set thisInfo to {thisValue as text, thisIndex}
… this …
set thisInfo to (current application's NSArray's arrayWithObjects_(thisValue,
thisIndex)) as list
NG
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