42 lines
1016 B
JavaScript
42 lines
1016 B
JavaScript
const caesar = function(value, addBy) {
|
|
|
|
const alphabet = 'abcdefghijklmnopqrstuvwxyz'.split('');
|
|
const valueLowerCase = value.toLowerCase();
|
|
const valueArray = valueLowerCase.split('');
|
|
|
|
var newArr = [];
|
|
|
|
for (var i = 0; i < valueArray.length; i++) {
|
|
if (alphabet.includes(valueArray[i])) {
|
|
let letterIndex = alphabet.indexOf(valueArray[i]);
|
|
let finalIndex = letterIndex + addBy;
|
|
|
|
newArr.push(alphabet[finalIndex]);
|
|
} else if (valueArray[i].includes(' ')) {
|
|
newArr.push(' ');
|
|
} else if (valueArray[i].includes('!')) {
|
|
newArr.push('!');
|
|
} else if (valueArray[i].includes(',')) {
|
|
newArr.push(',');
|
|
} else {
|
|
// return 'is not a part of the alphabet';
|
|
return 'no';
|
|
}
|
|
}
|
|
return newArr.join('');
|
|
}
|
|
|
|
module.exports = caesar;
|
|
|
|
/* Pseudocode
|
|
1 Take input and place in an array - then we have an array of letters
|
|
2 If not a letter then ignore
|
|
3 If a space or ! then return space or !
|
|
4 If it is a letter, it comes to the end then keep going around
|
|
5
|
|
6
|
|
7 Factor in minus
|
|
|
|
|
|
*/
|