String Compression

02 Jun, 2021

Problem

Write a program that compresses a character string by inputting a character string consisting of uppercase letters and writing the number of repetitions to the right of the repeated character when the same character is repeated continuously. <br/ >However, if the number of repetitions is 1, it is omitted.

input

A string is given on the first line. The length of the string does not exceed 100.

KKHSSSSSSSE

output

Prints a compressed string on the first line.

K2HS7E

Solution

using `Object.entries()`

function solution(s) {
	let answer = '';
	let cnt = 0;
	let temp = '';

	for (let [i, x] of Object.entries(s)) {
		if (!temp) temp = x;
		if (temp === x) cnt++;
		else {
			answer += temp;
			if (cnt > 1) answer += cnt;

			temp = x;
			cnt = 1;
		}
		if (parseInt(i) === s.length - 1) answer += x;
	}

	return answer;
}

function solution(s) {
	let answer = '';
	let cnt = 1;
	s = s + ' ';

	for (let i = 0; i < s.length - 1; i++) {
		if (s[i] === s[i + 1]) cnt++;
		else {
			answer += s[i];
			if (cnt > 1) answer += String(cnt);
			cnt = 1;
		}
	}

	return answer;
}