问题描述：
Count the number of segments in a string, where a segment is defined to be a contiguous sequence of non-space characters.
Please note that the string does not contain any non-printable characters.
Example

Input: "Hello, my name is John"
Output: 5

/**
 * @param {string} s
 * @return {number}
 */
var countSegments = function(s) {
    var count = 0; 
    var arr = s.split(' ');
    for(var i in arr){
        if(arr[i] !== ""){
            count++;
        }
    }
     return count;
};