typedash/dist/intersection/index.cjs

modern, type-safe collection of utility functions

'use strict';

// src/functions/createTypeGuard/createTypeGuard.ts
function createTypeGuard(values) {
  const setValues = new Set(values);
  return function predicate(v) {
    return setValues.has(v);
  };
}

// src/functions/intersection/intersection.ts
function intersection(array1, array2, comparator) {
  if (!comparator) {
    const isArray2Item = createTypeGuard(array2);
    return array1.filter(isArray2Item);
  }
  return array1.filter(
    (a1) => array2.some((a2) => comparator(a1, a2))
  );
}

exports.intersection = intersection;
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