/*****************************************************问题描述*************************************************
Given an array of integers, find if the array contains any duplicates.
Your function should return true if any value appears at least twice in the array, and it should return false 
if every element is distinct.
Example 1:
    Input: [1,2,3,1]
    Output: true
Example 2:
    Input: [1,2,3,4]
    Output: false
Example 3:
    Input: [1,1,1,3,3,4,3,2,4,2]
    Output: true
判断数组中是否有重复元素
/*****************************************************我的解答*************************************************
/**
 * @param {number[]} nums
 * @return {boolean}
 */
var containsDuplicate = function(nums) {
    nums.sort(function(a,b){return a - b;});
    for(var index = 0; index < nums.length - 1; index++)
    {
        if(nums[index] == nums[index + 1])
        {
            return true;
        }    
    }
    return false;
};
console.log(containsDuplicate([1,2,3,4]));