jiangchengfeiyi-xiaochengxu/node_modules/mathjs/lib/cjs/function/set/setIsSubset.js
2025-01-02 11:13:50 +08:00

68 lines
2.2 KiB
JavaScript

"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.createSetIsSubset = void 0;
var _array = require("../../utils/array.js");
var _factory = require("../../utils/factory.js");
const name = 'setIsSubset';
const dependencies = ['typed', 'size', 'subset', 'compareNatural', 'Index'];
const createSetIsSubset = exports.createSetIsSubset = /* #__PURE__ */(0, _factory.factory)(name, dependencies, _ref => {
let {
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} Returns true when a1 is a subset of a2, returns false otherwise
*/
return typed(name, {
'Array | Matrix, Array | Matrix': function (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;
}
const b1 = (0, _array.identify)((0, _array.flatten)(Array.isArray(a1) ? a1 : a1.toArray()).sort(compareNatural));
const b2 = (0, _array.identify)((0, _array.flatten)(Array.isArray(a2) ? a2 : a2.toArray()).sort(compareNatural));
let inb2;
for (let i = 0; i < b1.length; i++) {
inb2 = false;
for (let 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;
}
});
});