63 lines
1.7 KiB
JavaScript
63 lines
1.7 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.createSetDistinct = 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 = 'setDistinct';
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const dependencies = ['typed', 'size', 'subset', 'compareNatural', 'Index', 'DenseMatrix'];
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const createSetDistinct = exports.createSetDistinct = /* #__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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DenseMatrix
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} = _ref;
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/**
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* Collect the distinct elements of 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.setDistinct(set)
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*
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* Examples:
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*
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* math.setDistinct([1, 1, 1, 2, 2, 3]) // returns [1, 2, 3]
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*
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* See also:
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*
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* setMultiplicity
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*
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* @param {Array | Matrix} a A multiset
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* @return {Array | Matrix} A set containing the distinc elements of the multiset
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*/
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return typed(name, {
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'Array | Matrix': function (a) {
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let result;
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if (subset(size(a), new Index(0)) === 0) {
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// if empty, return empty
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result = [];
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} else {
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const b = (0, _array.flatten)(Array.isArray(a) ? a : a.toArray()).sort(compareNatural);
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result = [];
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result.push(b[0]);
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for (let i = 1; i < b.length; i++) {
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if (compareNatural(b[i], b[i - 1]) !== 0) {
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result.push(b[i]);
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}
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}
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}
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// return an array, if the input was an array
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if (Array.isArray(a)) {
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return result;
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}
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// return a matrix otherwise
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return new DenseMatrix(result);
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}
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});
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}); |