Message From Binary Code

Description


You are taking part in an Escape Room challenge designed specifically for programmers. In your efforts to find a clue, you’ve found a binary code written on the wall behind a vase, and realized that it must be an encrypted message. After some thought, your first guess is that each consecutive 8 bits of the code stand for the character with the corresponding extended ASCII code.

Assuming that your hunch is correct, decode the message.

Example

For code = "010010000110010101101100011011000110111100100001", the output should be messageFromBinaryCode(code) = "Hello!".

The first 8 characters of the code are 01001000, which is 72 in the binary numeral system. 72 stands for H in the ASCII-table, so the first letter is H. Other letters can be obtained in the same manner.

Input/Output

  • [execution time limit] 4 seconds (js)

  • [input] string code

A string, the encrypted message consisting of characters '0' and '1'.

Guaranteed constraints:

0 < code.length < 800.

  • [output] string

The decrypted message.

[JavaScript (ES6)] Syntax Tips

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// Prints help message to the console
// Returns a string
function helloWorld(name) {
    console.log("This prints to the console when you Run Tests");
    return "Hello, " + name;
}

Solution


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function messageFromBinaryCode(code) {
  return code.match(/[01]{8}/g).map((b)=>String.fromCharCode(Number('0b'+b))).join('')
}