Write-up for LeetCode problem 2703. Return Length of Arguments Passed

lint-staged.config.mjs

@@ -1,3 +1,5 @@
 export default {
+  // TODO: this doesn't quite work, because the `workspaces` directory is
+  // ignored by Prettier at the top-level...
   "*.{graphql,json,md,js,jsx,mjs,ts,tsx,mts}": "prettier --write",
 };

workspaces/javascript-leetcode-month/eslint.config.mjs

@@ -1 +1,4 @@
-export { default } from "@code-chronicles/eslint-config";
+import config from "@code-chronicles/eslint-config";
+
+// TODO: get to the point where we can use the lint
+export default [...config, { ignores: ["problems/"] }];

workspaces/javascript-leetcode-month/problems/2703-return-length-of-arguments-passed/README.md

@@ -0,0 +1,7 @@
+# 2703. Return Length of Arguments Passed
+
+[View Problem on LeetCode](https://leetcode.com/problems/return-length-of-arguments-passed/)
+
+This problem is essentially testing familiarity with [JavaScript's rest parameters](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/rest_parameters). However, there is also a solution that doesn't rely on rest parameters. Do you know it? It's hinted at in the documentation link.
+
+Once you've worked on the problem, check out [the full write-up and solution](solution.md).

workspaces/javascript-leetcode-month/problems/2703-return-length-of-arguments-passed/solutions/using-arguments-object/anonymous-function.js

@@ -0,0 +1,10 @@
+/**
+ * @return {number}
+ */
+const argumentsLength = function () {
+  return arguments.length;
+};
+
+/**
+ * argumentsLength(1, 2, 3); // 3
+ */

workspaces/javascript-leetcode-month/problems/2703-return-length-of-arguments-passed/solutions/using-arguments-object/anonymous-function.ts

@@ -0,0 +1,7 @@
+const argumentsLength = function (..._args: readonly unknown[]): number {
+  return arguments.length;
+};
+
+/**
+ * argumentsLength(1, 2, 3); // 3
+ */

workspaces/javascript-leetcode-month/problems/2703-return-length-of-arguments-passed/solutions/using-arguments-object/named-function-with-empty-destructure.ts

@@ -0,0 +1,7 @@
+function argumentsLength(...[]: readonly unknown[]): number {
+  return arguments.length;
+}
+
+/**
+ * argumentsLength(1, 2, 3); // 3
+ */

workspaces/javascript-leetcode-month/problems/2703-return-length-of-arguments-passed/solutions/using-arguments-object/named-function.js

@@ -0,0 +1,10 @@
+/**
+ * @return {number}
+ */
+function argumentsLength() {
+  return arguments.length;
+}
+
+/**
+ * argumentsLength(1, 2, 3); // 3
+ */

workspaces/javascript-leetcode-month/problems/2703-return-length-of-arguments-passed/solutions/using-arguments-object/named-function.ts

@@ -0,0 +1,7 @@
+function argumentsLength(..._args: readonly unknown[]): number {
+  return arguments.length;
+}
+
+/**
+ * argumentsLength(1, 2, 3); // 3
+ */

workspaces/javascript-leetcode-month/problems/2703-return-length-of-arguments-passed/solutions/using-rest-parameters/arrow-function-without-return-annotation.ts

@@ -0,0 +1,5 @@
+const argumentsLength = (...args: readonly unknown[]) => args.length;
+
+/**
+ * argumentsLength(1, 2, 3); // 3
+ */

workspaces/javascript-leetcode-month/problems/2703-return-length-of-arguments-passed/solutions/using-rest-parameters/arrow-function.ts

@@ -0,0 +1,5 @@
+const argumentsLength = (...args: readonly unknown[]): number => args.length;
+
+/**
+ * argumentsLength(1, 2, 3); // 3
+ */

workspaces/javascript-leetcode-month/problems/2703-return-length-of-arguments-passed/solutions/using-rest-parameters/named-function.js

@@ -0,0 +1,11 @@
+/**
+ * @param {...(null|boolean|number|string|Array|Object)} args
+ * @return {number}
+ */
+function argumentsLength(...args) {
+  return args.length;
+}
+
+/**
+ * argumentsLength(1, 2, 3); // 3
+ */

workspaces/javascript-leetcode-month/problems/2703-return-length-of-arguments-passed/solutions/using-rest-parameters/named-function.ts

@@ -0,0 +1,7 @@
+function argumentsLength(...args: readonly unknown[]): number {
+  return args.length;
+}
+
+/**
+ * argumentsLength(1, 2, 3); // 3
+ */