Day 27 of 100 Days Of Code
Day 27: August 20, Monday
Today ‘s Progress: I continue work on Introduction to the JavaScript Algorithms and Data Structures Projects.
Thoughts: Today focused on trying to define the challenge Caesar Cipher (or ROT13) and meet the requirements to pass This project. CaesarCipher.js is located here:FCC-Projects/FCC_JS_Projects.
After examining the requirements I made the following user story, As a user I want to: enter a ROT13 encoded string as input to a function which will returns a decoded plain text string. also:
- All letters will be uppercase.
- Do not transform any non-alphabetic character (i.e. spaces, punctuation), but be sure to pass them on in the result. I used the following:
- String.prototype.replace(),
- String.fromCharCode(),
- ternary operator
console.log("Caesars Cipher")
//Write a function which takes a ROT13 encoded string as input and returns a decoded string.
/***************************************************************
* JavaScript Algorithms and Data Structures Projects: *
* CaesarsCipher, JJ 2018 *
* https://repl.it/@JohnJohnson2/FCCProjectCaesarsCipher *
***************************************************************/
//My solution
function rot13(str) { // LBH QVQ VG!
let myStr = "";
console.log(str + "");//Debugging str contents
console.log((str + "").replace(/[A-Z]/gi, function (myStr) { return String.fromCharCode(myStr.charCodeAt(0) + (myStr.toLowerCase() < "n" ? 13 : -13));}));//Debugging conversion routine, should decode in ROT 13 or encode if plain text
return (str + "").replace(/[A-Z]/gi, function (myStr) {
return String.fromCharCode(myStr.charCodeAt(0) + (myStr.toLowerCase() < "n" ? 13 : -13));
});
};
// Change the inputs below to test
rot13("SERR PBQR PNZC");
rot13("My Test");
This was not too hard but I did have some minor code problems that caused a couple refactoring of the code get the tests to pass. Then I wasn’t happy and wanted to use ternary operator ? and .replace.
Link(s) to work
- Work on Projects Introduction to the JavaScript Algorithms and Data Structures Projects.
Introduction to the Functional Programming Challenges
- PassedCaesars Cipher
All code is in GitHub and repl.it here: repl.it FCCProjectCaesarsCipher or FCC-Projects/FCC_JS_Projects