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Re: How to get the index of an item in a list
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Re: How to get the index of an item in a list


  • Subject: Re: How to get the index of an item in a list
  • From: "Serge Belleudy-d'Espinose" <email@hidden>
  • Date: Mon, 25 Jun 2001 11:13:24 +0200

At 2:45 -0500 25/06/01, Greg Strange wrote:

>I can see where I could loop through with a counter and get it but isn't
>there a better way?

If your list is only strings, you can use TIDs. Here is a simple handler:

>on _list_offset(xItem, xList)
>
> set xLength to xList's length
> set xTID to "*"
>
> set {oldTID, AppleScript's text item delimiters} to ,
> {AppleScript's text item delimiters, xTID}
>
> set xList to xTID & xList & xTID
>
> set AppleScript's text item delimiters to xTID & xItem & xTID
>
> set xList to xList's text items
>
> set AppleScript's text item delimiters to xTID
>
> set xOffset to (xList's first item's text items)'s length
>
> set AppleScript's text item delimiters to oldTID
>
> if xOffset > xLength then set xOffset to 0
>
> return xOffset
>
>end _list_offset
>
>_list_offset("un", {"un", "deux", "trois"})
> --> 1
>_list_offset("trois", {"un", "deux", "trois"})
> --> 3
>_list_offset("quatre", {"un", "deux", "trois"})
> --> 0

The main drawback of this handler is that TIDs are case sensitive:

>_list_offset("Un", {"un", "deux", "trois"})
> --> 0


Serge
--
\\//\//\// Serge Belleudy-d'Espinose Institut Jacques Monod
// // // http://www.ijm.jussieu.fr/ Univ. Jussieu - Paris
//\//\//\\


References: 
 >How to get the index of an item in a list (From: Greg Strange <email@hidden>)

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