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('')
}