js 数组排序

    //数组排序
let arr = [{age:12},{age:100},{age:18}];

console.log( arr.sort((a,b) =>a.age- b.age))//[{age:12},{age:18},{age:100}]

arr.push({age:50})
console.log( arr.sort((a,b) =>a.age- b.age))//[{age:12},{age:18},{age:50},{age:100}]