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Switch to array uniquing function that keeps the first instance

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The previous version would keep only the last instance.

This version requires the array to contain only primitives of a single
data type, but I think that's OK for all of our uses. (This version
should also be faster.)
This commit is contained in:
Dan Stillman 2014-05-07 03:10:39 -04:00
parent 42c02526ef
commit d65ee27592
1 changed files with 6 additions and 10 deletions
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16
chrome/content/zotero/xpcom/utilities.js
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@ -604,23 +604,19 @@ Zotero.Utilities = {
/**
* Return new array with duplicate values removed
*
* From the JSLab Standard Library (JSL)
* Copyright 2007 - 2009 Tavs Dokkedahl
* Contact: http://www.jslab.dk/contact.php
* From http://stackoverflow.com/a/1961068
*
* @param {Array} array
* @return {Array}
*/
"arrayUnique":function(arr) {
var a = [];
var l = arr.length;
for(var i=0; i<l; i++) {
for(var j=i+1; j<l; j++) {
// If this[i] is found later in the array
if (arr[i] === arr[j])
j = ++i;
var u = {}, a = [];
for (var i=0, l=arr.length; i<l; ++i){
if (u.hasOwnProperty(arr[i])) {
continue;
}
a.push(arr[i]);
u[arr[i]] = 1;
}
return a;
},