feat:node-modules

node_modules/mathjs/lib/cjs/function/set/setCartesian.js

@@ -0,0 +1,64 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.createSetCartesian = void 0;
+var _array = require("../../utils/array.js");
+var _factory = require("../../utils/factory.js");
+const name = 'setCartesian';
+const dependencies = ['typed', 'size', 'subset', 'compareNatural', 'Index', 'DenseMatrix'];
+const createSetCartesian = exports.createSetCartesian = /* #__PURE__ */(0, _factory.factory)(name, dependencies, _ref => {
+  let {
+    typed,
+    size,
+    subset,
+    compareNatural,
+    Index,
+    DenseMatrix
+  } = _ref;
+  /**
+   * Create the cartesian product of two (multi)sets.
+   * Multi-dimension arrays will be converted to single-dimension arrays
+   * and the values will be sorted in ascending order before the operation.
+   *
+   * Syntax:
+   *
+   *    math.setCartesian(set1, set2)
+   *
+   * Examples:
+   *
+   *    math.setCartesian([1, 2], [3, 4])        // returns [[1, 3], [1, 4], [2, 3], [2, 4]]
+   *    math.setCartesian([4, 3], [2, 1])        // returns [[3, 1], [3, 2], [4, 1], [4, 2]]
+   *
+   * See also:
+   *
+   *    setUnion, setIntersect, setDifference, setPowerset
+   *
+   * @param {Array | Matrix}    a1  A (multi)set
+   * @param {Array | Matrix}    a2  A (multi)set
+   * @return {Array | Matrix}    The cartesian product of two (multi)sets
+   */
+  return typed(name, {
+    'Array | Matrix, Array | Matrix': function (a1, a2) {
+      let result = [];
+      if (subset(size(a1), new Index(0)) !== 0 && subset(size(a2), new Index(0)) !== 0) {
+        // if any of them is empty, return empty
+        const b1 = (0, _array.flatten)(Array.isArray(a1) ? a1 : a1.toArray()).sort(compareNatural);
+        const b2 = (0, _array.flatten)(Array.isArray(a2) ? a2 : a2.toArray()).sort(compareNatural);
+        result = [];
+        for (let i = 0; i < b1.length; i++) {
+          for (let j = 0; j < b2.length; j++) {
+            result.push([b1[i], b2[j]]);
+          }
+        }
+      }
+      // return an array, if both inputs were arrays
+      if (Array.isArray(a1) && Array.isArray(a2)) {
+        return result;
+      }
+      // return a matrix otherwise
+      return new DenseMatrix(result);
+    }
+  });
+});