Function Length

easycodingJavaScriptFunctions~10 min

Asked at Google, Meta, Amazon

Overview

Implement functionLength(fn) that returns the number of formal parameters.

Examples

functionLength(function(a, b, c) {}); // 3
functionLength(function() {}); // 0

Solution

Reveal solution

function functionLength(fn) {
  return fn.length;
}

function-length.js

Function Length

easycodingJavaScriptFunctions

Overview

Implement functionLength(fn) that returns the number of formal parameters.

Examples

functionLength(function(a, b, c) {}); // 3
functionLength(function() {}); // 0

Solution

Reveal solution

function functionLength(fn) {
  return fn.length;
}

NameTopicDifficulty

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