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
1
2
3
4
5
6
// 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
1
2
3
function messageFromBinaryCode(code) {
return code.match(/[01]{8}/g).map((b)=>String.fromCharCode(Number('0b'+b))).join('')
}