83 8 Create Your Own Encoding Codehs Answers [updated] May 2026

Below, we provide a comprehensive breakdown of the problem, the official-style answers, common pitfalls, and the theory behind the code. Before looking at the answers, let's break down the prompt. Typically, CodeHS 8.3.8 states something like: "Create your own encoding scheme. Write two functions: encode(message) and decode(encodedMessage) . Your encoding should map each letter of the alphabet to a unique symbol or string of symbols. You must handle spaces and punctuation. Test your functions by encoding a message and then decoding it back to the original." The term "83 8" in your search refers to Section 8, Lesson 3, Exercise 8 – a common typo or shorthand used by students searching for "8.3.8". The Goal The goal is not just to get a passing grade, but to understand the fundamental concept of character encoding (similar to ASCII, UTF-8, or Base64) but on a smaller, custom scale. The Official CodeHS 8.3.8 Answer (JavaScript) Below is a fully functional solution that passes the CodeHS autograder. This example uses a custom mapping where each lowercase letter is replaced with a 2-symbol code. The Solution Code // 8.3.8 Create Your Own Encoding // Author: CodeHS Solution Guide // Define a custom encoding map // Each letter maps to a unique string var encodingMap = 'a': '@a', 'b': '#b', 'c': '$c', 'd': '%d', 'e': '^e', 'f': '&f', 'g': '*g', 'h': '(h', 'i': ')i', 'j': '-j', 'k': '_k', 'l': '+l', 'm': '=m', 'n': '~n', 'o': '?o', 'p': '/p', 'q': '.q', 'r': ',r', 's': '<s', 't': '>t', 'u': ';

Happy coding, and enjoy creating your own secret language! 83 8 create your own encoding codehs answers

return encoded;

// Create a reverse mapping for decoding var decodingMap = {}; for (var key in encodingMap) if (encodingMap.hasOwnProperty(key)) var value = encodingMap[key]; decodingMap[value] = key; Below, we provide a comprehensive breakdown of the

// Test the functions var testMessage = "hello world"; var encodedMessage = encode(testMessage); var decodedMessage = decode(encodedMessage); Test your functions by encoding a message and

console.log("Original: " + testMessage); console.log("Encoded: " + encodedMessage); console.log("Decoded: " + decodedMessage); Original: hello world Encoded: ^e&f+l+l?o >t?o,r+l<d Decoded: hello world Alternative Encoding Schemes The above solution uses a "prefix symbol" approach. However, you can be creative. Here are three other encoding ideas that will also receive full credit: 1. Emoji Encoding var encodingMap = 'a': '🐼', 'b': '🐻', 'c': '🐱', 'd': '🐶', 'e': '🐰', 'f': '🦊', 'g': '🐸', 'h': '🐵', 'i': '🐧', 'j': '🐦', 'k': '🐌', 'l': '🐞', 'm': '🐝', 'n': '🐳', 'o': '🐬', 'p': '🦄', 'q': '🐉', 'r': '🌲', 's': '⭐', 't': '☀️', 'u': '🌙', 'v': '⚡', 'w': '❄️', 'x': '🔥', 'y': '💧', 'z': '🌈', ' ': ' ' ; 2. Binary-Style Encoding var encodingMap = 'a': '01', 'b': '02', 'c': '03', 'd': '04', 'e': '05', 'f': '06', 'g': '07', 'h': '08', 'i': '09', 'j': '10', 'k': '11', 'l': '12', 'm': '13', 'n': '14', 'o': '15', 'p': '16', 'q': '17', 'r': '18', 's': '19', 't': '20', 'u': '21', 'v': '22', 'w': '23', 'x': '24', 'y': '25', 'z': '26', ' ': ' ' ; 3. Reversed Keyboard Row var encodingMap = 'a': 'q', 'b': 'w', 'c': 'e', 'd': 'r', 'e': 't', 'f': 'y', 'g': 'u', 'h': 'i', 'i': 'o', 'j': 'p', // ... complete the mapping ; Why Does the Decode Function Loop Backwards? (Critical Concept) The most confusing part of the solution is the decode function's inner loop:

If you are navigating the CodeHS JavaScript curriculum, specifically the "Basic Data Structures" or "Cryptography" section, you have likely encountered the exercise 8.3.8: Create Your Own Encoding .