text: import { flatten, identify } from '../../utils/array.js';
  import { factory } from '../../utils/factory.js';
  var name = 'setIsSubset';
  var dependencies = ['typed', 'size', 'subset', 'compareNatural', 'Index'];
  export var createSetIsSubset = /* #__PURE__ */factory(name, dependencies, (_ref) => {
    var {
      typed,
      size,
      subset,
      compareNatural,
      Index
    } = _ref;
  
    /**
     * Check whether a (multi)set is a subset of another (multi)set. (Every element of set1 is the element of set2.)
     * Multi-dimension arrays will be converted to single-dimension arrays before the operation.
     *
     * Syntax:
     *
     *    math.setIsSubset(set1, set2)
     *
     * Examples:
     *
     *    math.setIsSubset([1, 2], [3, 4, 5, 6])        // returns false
     *    math.setIsSubset([3, 4], [3, 4, 5, 6])        // returns true
     *
     * See also:
     *
     *    setUnion, setIntersect, setDifference
     *
     * @param {Array | Matrix}    a1  A (multi)set
     * @param {Array | Matrix}    a2  A (multi)set
     * @return {boolean}            true | false
     */
    return typed(name, {
      'Array | Matrix, Array | Matrix': function ArrayMatrixArrayMatrix(a1, a2) {
        if (subset(size(a1), new Index(0)) === 0) {
          // empty is a subset of anything
          return true;
        } else if (subset(size(a2), new Index(0)) === 0) {
          // anything is not a subset of empty
          return false;
        }
  
        var b1 = identify(flatten(Array.isArray(a1) ? a1 : a1.toArray()).sort(compareNatural));
        var b2 = identify(flatten(Array.isArray(a2) ? a2 : a2.toArray()).sort(compareNatural));
        var inb2;
  
        for (var i = 0; i < b1.length; i++) {
          inb2 = false;
  
          for (var j = 0; j < b2.length; j++) {
            if (compareNatural(b1[i].value, b2[j].value) === 0 && b1[i].identifier === b2[j].identifier) {
              // the identifier is always a decimal int
              inb2 = true;
              break;
            }
          }
  
          if (inb2 === false) {
            return false;
          }
        }
  
        return true;
      }
    });
  });