1678-goal-parser-interpretation.js

/**
 * 1678. Goal Parser Interpretation
 * https://leetcode.com/problems/goal-parser-interpretation/
 * Difficulty: Easy
 *
 * You own a Goal Parser that can interpret a string command. The command consists of an alphabet
 * of "G", "()" and/or "(al)" in some order. The Goal Parser will interpret "G" as the string
 * "G", "()" as the string "o", and "(al)" as the string "al". The interpreted strings are then
 * concatenated in the original order.
 *
 * Given the string command, return the Goal Parser's interpretation of command.
 */

/**
 * @param {string} command
 * @return {string}
 */
var interpret = function(command) {
  let result = '';

  for (let i = 0; i < command.length; i++) {
    if (command[i] === 'G') {
      result += 'G';
    } else if (command[i] === '(' && command[i + 1] === ')') {
      result += 'o';
      i++;
    } else {
      result += 'al';
      i += 3;
    }
  }

  return result;
};