56 lines
1.6 KiB
JavaScript
56 lines
1.6 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.createSetMultiplicity = void 0;
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var _array = require("../../utils/array.js");
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var _factory = require("../../utils/factory.js");
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const name = 'setMultiplicity';
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const dependencies = ['typed', 'size', 'subset', 'compareNatural', 'Index'];
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const createSetMultiplicity = exports.createSetMultiplicity = /* #__PURE__ */(0, _factory.factory)(name, dependencies, _ref => {
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let {
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typed,
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size,
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subset,
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compareNatural,
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Index
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} = _ref;
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/**
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* Count the multiplicity of an element in a multiset.
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* A multi-dimension array will be converted to a single-dimension array before the operation.
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*
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* Syntax:
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*
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* math.setMultiplicity(element, set)
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*
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* Examples:
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*
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* math.setMultiplicity(1, [1, 2, 2, 4]) // returns 1
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* math.setMultiplicity(2, [1, 2, 2, 4]) // returns 2
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*
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* See also:
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*
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* setDistinct, setSize
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*
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* @param {number | BigNumber | Fraction | Complex} e An element in the multiset
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* @param {Array | Matrix} a A multiset
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* @return {number} The number of how many times the multiset contains the element
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*/
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return typed(name, {
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'number | BigNumber | Fraction | Complex, Array | Matrix': function (e, a) {
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if (subset(size(a), new Index(0)) === 0) {
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// if empty, return 0
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return 0;
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}
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const b = (0, _array.flatten)(Array.isArray(a) ? a : a.toArray());
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let count = 0;
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for (let i = 0; i < b.length; i++) {
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if (compareNatural(b[i], e) === 0) {
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count++;
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}
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}
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return count;
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}
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});
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}); |