js多维数组根据某个参数sort排序

//数据
var arr1 = [
	{id:1, name:'小明', num: 121},
	{id:2, name:'小文', num: 321},
	{id:3, name:'小西', num: 211}
]

//方法
function compare(property){
	return function(a,b){
		var value1 = a[property];
		var value2 = b[property];
		return value1 - value2;
	}
}

//结果
console.log(arr1.sort(compare('num')))
[
	{id: 1, name: "小明", num: 121}
	{id: 3, name: "小西", num: 211}
	{id: 2, name: "小文", num: 321}
]