const singers = [
{ name: 'Steven Tyler', band: 'Aerosmith', born: 1948 },
{ name: 'Karen Carpenter', band: 'The Carpenters', born: 1950 },
{ name: 'Kurt Cobain', band: 'Nirvana', born: 1967 },
{ name: 'Stevie Nicks', band: 'Fleetwood Mac', born: 1948 },
];
Array.prototype.sort() 方法用原地算法对数组的元素进行排序，并返回数组。在很多排序场景下推荐使用。
语法：
arr.sort([compareFunction])
这道题在实现上也比较简单，我们直接看实现方法：
function compare(a, b) {
return a.born < b.born ? 1: -1
}
singers.sort(compare);
/* returns [
{ name: 'Steven Tyler', band: 'Aerosmith', born: 1948 },
{ name: 'Stevie Nicks', band: 'Fleetwood Mac', born: 1948 },
{ name: 'Kurt Cobain', band: 'Nirvana', born: 1967 },
{ name: 'Karen Carpenter', band: 'The Carpenters', born: 1950 }
] */
