53 lines
1.6 KiB
JavaScript
53 lines
1.6 KiB
JavaScript
import { flatten } from '../../utils/array.js';
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import { factory } from '../../utils/factory.js';
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var name = 'setSize';
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var dependencies = ['typed', 'compareNatural'];
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export var createSetSize = /* #__PURE__ */factory(name, dependencies, _ref => {
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var {
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typed,
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compareNatural
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} = _ref;
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/**
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* Count the number of elements of a (multi)set. When a second parameter is 'true', count only the unique values.
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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.setSize(set)
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* math.setSize(set, unique)
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*
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* Examples:
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*
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* math.setSize([1, 2, 2, 4]) // returns 4
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* math.setSize([1, 2, 2, 4], true) // returns 3
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*
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* See also:
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*
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* setUnion, setIntersect, setDifference
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*
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* @param {Array | Matrix} a A multiset
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* @return {number} The number of elements of the (multi)set
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*/
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return typed(name, {
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'Array | Matrix': function ArrayMatrix(a) {
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return Array.isArray(a) ? flatten(a).length : flatten(a.toArray()).length;
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},
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'Array | Matrix, boolean': function ArrayMatrixBoolean(a, unique) {
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if (unique === false || a.length === 0) {
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return Array.isArray(a) ? flatten(a).length : flatten(a.toArray()).length;
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} else {
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var b = flatten(Array.isArray(a) ? a : a.toArray()).sort(compareNatural);
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var count = 1;
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for (var i = 1; i < b.length; i++) {
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if (compareNatural(b[i], b[i - 1]) !== 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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});
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}); |