如何在JavaScript中对数组进行排序？举例说明？
排序
排序不过是按升序或降序显示元素。Array.sort()函数用于根据compare()JavaScript中的函数对数组进行排序。
a）在给定程序中，我们将按age属性对数组进行降序排序。
示例
<html>
<body>
<script>
var persons = [
{ name: 'rajesh', birthdate: 1845, death: 1875 },
{ name: 'Bharat', birthdate: 1909, death: 1917},
{ name: 'baba', birthdate: 1950, death: 1972 },
{ name: 'Tanish', birthdate: 2039, death: 2067 },
{ name: 'rahim', birthdate: 1989, death: 2049 }
]
var sortedArray = persons.sort(function(a,b) {
var lastPerson = a.death - a.birthdate;
var nextPerson = b.death - b.birthdate;
if (lastPerson > nextPerson) {
return -1;
} else {
return 1;
}
});
console.log(sortedArray);
</script>
</body>
</html>在浏览器控制台中输出
{name: "rahim", birthdate: 1989, death: 2049}
{name: "rajesh", birthdate: 1845, death: 1875}
{name: "Tanish", birthdate: 2039, death: 2067}
{name: "baba", birthdate: 1950, death: 1972}
{name: "Bharat", birthdate: 1909, death: 1917}b）在这里进行排序，以便使用age属性将数组升序排列
示例
<html>
<body>
<script>
var persons = [
{ name: 'rajesh', birthdate: 1845, death: 1875 },
{ name: 'Bharat', birthdate: 1909, death: 1917},
{ name: 'baba', birthdate: 1950, death: 1972 },
{ name: 'Tanish', birthdate: 2039, death: 2067 },
{ name: 'rahim', birthdate: 1989, death: 2049 }
]
var sortedArray = persons.sort(function(a,b) {
var lastPerson = a.death - a.birthdate;
var nextPerson = b.death - b.birthdate;
if (lastPerson < nextPerson) {
return -1;
} else
{
return 1;
}
});
console.log(sortedArray);
</script>
</body>
</html>在浏览器控制台中输出
{name: "Bharat", birthdate: 1909, death: 1917}
{name: "baba", birthdate: 1950, death: 1972}
{name: "Tanish", birthdate: 2039, death: 2067}
{name: "rajesh", birthdate: 1845, death: 1875}
{name: "rahim", birthdate: 1989, death: 2049}