[LeetCode][JavaScript]Summary Ranges

Summary Ranges

Given a sorted integer array without duplicates, return the summary of its ranges.

For example, given [0,1,2,4,5,7], return ["0->2","4->5","7"].

https://leetcode.com/problems/summary-ranges/

 

 

 

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 简单的模拟题，合并连续的数字，test case排过序而且不会重复。

/**
 * @param {number[]} nums
 * @return {string[]}
 */
var summaryRanges = function(nums) {
    var result = [];
    var start = null;
    for(var i = 0; i < nums.length; i++){
        if(start === null){
            if(!nums[i + 1] || nums[i + 1] - nums[i] !== 1){
                result.push(nums[i] + "");
            }else{
                start = nums[i];
            }
        }else if(!nums[i + 1] || nums[i + 1] - nums[i] !== 1){
            result.push(start + "->" + nums[i]);
            start = null;
        }
    }    
    return result;
};