feat:node-modules

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

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