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Optimize _.union.

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Former-commit-id: 0cba8cac81a621b1fdbe8868ab406a30eb1d743f
This commit is contained in:
John-David Dalton
2012-12-06 23:09:41 -08:00
parent 54b862bd79
commit 090fb09955
2 changed files with 40 additions and 2 deletions
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6
lodash.js
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@@ -3140,11 +3140,13 @@
if (isLarge) {
// manually coerce `computed` to a string because `hasOwnProperty`, in
// some older versions of Firefox, coerces objects incorrectly
seen = hasOwnProperty.call(cache, computed + '') ? cache[computed] : (cache[computed] = []);
var inited = hasOwnProperty.call(cache, computed + '')
? !(seen = cache[computed])
: (seen = []);
}
if (isSorted
? !index || seen[seen.length - 1] !== computed
: indexOf(seen, computed) < 0
: inited || indexOf(seen, computed) < 0
) {
if (callback || isLarge) {
seen.push(computed);