feat:node-modules

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

@@ -0,0 +1,50 @@
+import { flatten } from '../../utils/array.js';
+import { factory } from '../../utils/factory.js';
+var name = 'setMultiplicity';
+var dependencies = ['typed', 'size', 'subset', 'compareNatural', 'Index'];
+export var createSetMultiplicity = /* #__PURE__ */factory(name, dependencies, _ref => {
+  var {
+    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 number__BigNumber__Fraction__Complex_Array__Matrix(e, a) {
+      if (subset(size(a), new Index(0)) === 0) {
+        // if empty, return 0
+        return 0;
+      }
+      var b = flatten(Array.isArray(a) ? a : a.toArray());
+      var count = 0;
+      for (var i = 0; i < b.length; i++) {
+        if (compareNatural(b[i], e) === 0) {
+          count++;
+        }
+      }
+      return count;
+    }
+  });
+});