intersection.js
586 Bytes
define(['./unique', './filter', './every', './contains', './slice'], function (unique, filter, every, contains, slice) {
/**
* Return a new Array with elements common to all Arrays.
* - based on underscore.js implementation
*/
function intersection(arr) {
var arrs = slice(arguments, 1),
result = filter(unique(arr), function(needle){
return every(arrs, function(haystack){
return contains(haystack, needle);
});
});
return result;
}
return intersection;
});