陣列排序，根據陣列中物件的某一個屬性進行排序

陣列排序 

sortlen =[1,9,11,55,3,4]
sortlen = sortlen.sort(function(x,y){
 		return y-x;  //從大到小
 })
console.log(sortlen); //[55,11,9,4,3,1]

根據陣列中物件的某一個屬性進行排序

//根據age從小到大排列
var arra=[{"name":"張三","age":16},{"name":"王五","age":6},{"name":"李四","age":14}]
var by = function(name){
	 return function(o, p){
		var a, b;
	 if (typeof o === "object" && typeof p === "object" && o && p) {
			 a = o[name];
			 b = p[name];
			 if (a === b) {
				return 0;
			 }
			 if (typeof a === typeof b) {
				 return a < b ? -1 : 1;  //從大到小時 對調-1和1的位置
			 }
			     return typeof a < typeof b ? -1 : 1;
			 } else {
				throw ("error");
					 }
			}
		}
arra=arra.sort(by("age"));	
console.log(arra)
//[{"name":"王五","age":6},{"name":"李四","age":14},{"name":"張三","age":16},]
 

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