overlaps/index.js

Simple utility that checks whether or not two arrays overlap. It is equivalent to intersection(arr1, arr2).length > 0, but is more performant.

module.exports = function(arr1, arr2, cmp) {
  cmp = cmp || function(a, b) { return a === b; };

  return arr1.some(function(item) {
    return arr2.some(function(item2) {
      return cmp(item, item2);
    });
  });
};