70 lines
1.8 KiB
JavaScript
70 lines
1.8 KiB
JavaScript
|
"use strict";
|
||
|
|
|
||
|
|
Object.defineProperty(exports, "__esModule", {
|
||
|
|
value: true
|
||
|
|
});
|
||
|
|
exports.createSetDistinct = void 0;
|
||
|
|
|
||
|
|
var _array = require("../../utils/array.js");
|
||
|
|
|
||
|
|
var _factory = require("../../utils/factory.js");
|
||
|
|
|
||
|
|
var name = 'setDistinct';
|
||
|
|
var dependencies = ['typed', 'size', 'subset', 'compareNatural', 'Index', 'DenseMatrix'];
|
||
|
|
var createSetDistinct = /* #__PURE__ */(0, _factory.factory)(name, dependencies, function (_ref) {
|
||
|
|
var typed = _ref.typed,
|
||
|
|
size = _ref.size,
|
||
|
|
subset = _ref.subset,
|
||
|
|
compareNatural = _ref.compareNatural,
|
||
|
|
Index = _ref.Index,
|
||
|
|
DenseMatrix = _ref.DenseMatrix;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Collect the distinct elements of a multiset.
|
||
|
|
* A multi-dimension array will be converted to a single-dimension array before the operation.
|
||
|
|
*
|
||
|
|
* Syntax:
|
||
|
|
*
|
||
|
|
* math.setDistinct(set)
|
||
|
|
*
|
||
|
|
* Examples:
|
||
|
|
*
|
||
|
|
* math.setDistinct([1, 1, 1, 2, 2, 3]) // returns [1, 2, 3]
|
||
|
|
*
|
||
|
|
* See also:
|
||
|
|
*
|
||
|
|
* setMultiplicity
|
||
|
|
*
|
||
|
|
* @param {Array | Matrix} a A multiset
|
||
|
|
* @return {Array | Matrix} A set containing the distinc elements of the multiset
|
||
|
|
*/
|
||
|
|
return typed(name, {
|
||
|
|
'Array | Matrix': function ArrayMatrix(a) {
|
||
|
|
var result;
|
||
|
|
|
||
|
|
if (subset(size(a), new Index(0)) === 0) {
|
||
|
|
// if empty, return empty
|
||
|
|
result = [];
|
||
|
|
} else {
|
||
|
|
var b = (0, _array.flatten)(Array.isArray(a) ? a : a.toArray()).sort(compareNatural);
|
||
|
|
result = [];
|
||
|
|
result.push(b[0]);
|
||
|
|
|
||
|
|
for (var i = 1; i < b.length; i++) {
|
||
|
|
if (compareNatural(b[i], b[i - 1]) !== 0) {
|
||
|
|
result.push(b[i]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} // return an array, if the input was an array
|
||
|
|
|
||
|
|
|
||
|
|
if (Array.isArray(a)) {
|
||
|
|
return result;
|
||
|
|
} // return a matrix otherwise
|
||
|
|
|
||
|
|
|
||
|
|
return new DenseMatrix(result);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
});
|
||
|
|
exports.createSetDistinct = createSetDistinct;
|