Summary Ranges

summary-ranges.js

/**
 * Created by Hoan Nguyen on 11/8/2017.
 * https://leetcode.com/problems/summary-ranges/description/
 *
 */

/**
 * @param {number[]} nums
 * @return {string[]}
 */
var summaryRanges = function(nums) {
	var output = [];
	var temp = "";

	for (var i = 0; i < nums.length; i++) {
		if (!temp) {
			temp += nums[i];
			if (nums[i] + 1 !== nums[i + 1]) {
				output.push(temp);
				temp = "";
			}
		}
		else {
			if (nums[i] + 1 !== nums[i + 1]) {
				temp += "->";
				temp += nums[i];
				output.push(temp);
				temp = "";
			}

		}

	}
	if (temp) output.push(temp);
	return output;
};

console.log(summaryRanges([0, 1, 2, 4, 5, 7]));
console.log(summaryRanges([0, 2, 3, 4, 6, 8, 9]));