Suppose, we have a string like this −
const str = 'aabbcde';
Here, we have 2a's, 2b's 1c 1d and 1e
We are required to write a JavaScript function that takes in one such string. The function should then construct a string with the character count followed by the character.
Therefore, for the above string, the output should look like −
const output = '2a2b1c1d1e';
Example
const str = 'aabbcde'; const repeatLetter = (str = '') => { const strArr = str.split("").sort(); let count = 1; let i = 1; let res = ''; while (i < strArr.length) { if (strArr[i - 1] === strArr[i]) { count++; } else { res += count + strArr[i - 1]; count = 1; }; i++; }; res += count + strArr[i - 1]; return res; }; console.log(repeatLetter(str));
Output
This will produce the following output −
2a2b1c1d1e