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lodash: Optimize intersection. [jddalton]

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Former-commit-id: f15eb7429ab4f14a4b096f5ba72f3662f9ed23d7
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John-David Dalton
2012-04-30 22:32:07 -04:00
parent 142ee20bca
commit d702e00446
1 changed files with 14 additions and 6 deletions
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20
lodash.js
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@@ -1101,12 +1101,20 @@
* // => [1, 2] * // => [1, 2]
*/ */
function intersection(array) { function intersection(array) {
var rest = slice.call(arguments, 1); var value,
return filter(uniq(array), function(value) { index = -1,
return every(rest, function(other) { length = array.length,
return indexOf(other, value) > -1; others = slice.call(arguments, 1),
}); result = [];
});
while (++index < length) {
value = array[index];
if (indexOf(result, value) < 0 &&
every(others, function(other) { return indexOf(other, value) > -1; })) {
result.push(value);
}
}
return result;
} }
/** /**