32 lines
680 B
JavaScript
32 lines
680 B
JavaScript
|
exports.encode = function (string) {
|
||
|
|
let counter = 1;
|
||
|
|
let output = '';
|
||
|
|
for (let i = 0; i < string.length; i++) {
|
||
|
|
if (string[i] == string[i + 1]) {
|
||
|
|
counter++;
|
||
|
|
} else {
|
||
|
|
if (counter > 1) {
|
||
|
|
output += counter;
|
||
|
|
}
|
||
|
|
output += string[i];
|
||
|
|
counter = 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return output;
|
||
|
|
};
|
||
|
|
|
||
|
|
exports.decode = function (string) {
|
||
|
|
let output = '';
|
||
|
|
let number = '';
|
||
|
|
for (let i = 0; i < string.length; i++) {
|
||
|
|
if (!isNaN(parseInt(string[i]))) {
|
||
|
|
number += string[i];
|
||
|
|
} else {
|
||
|
|
const count = isNaN(parseInt(number)) ? 1 : parseInt(number);
|
||
|
|
output += string[i].repeat(count);
|
||
|
|
number = '';
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return output;
|
||
|
|
};
|