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sort排序

2022-07-27 20:39:00 【yibucuo】

arr.sort()不传参数，排纯字符串时

 var arr = ['a', 'cc', 'ef', 'cb', 'ca', 'ea', 'bc']
 arr.sort()
 console.log(arr); // ['a', 'bc', 'ca', 'cb', 'cc', 'ea', 'ef']

brr.sort()不传参数，排纯数字时

var brr = [10, 5, 2, 8, 1, 100, 30, 12, 4, 3]
brr.sort()
console.log(brr);// [1, 10, 100, 12, 2, 3, 30, 4, 5, 8]

crr.sort()不传参数，数字和字符串混合排序

var crr = ['a', 10, 'cc', 5, 'ef', 'cb', 2, 'ca', 8, 'ea', 1, 'bc', 100,'a1','c1', 30, 12, 4, 3]
crr.sort()
console.log(crr);// [1, 10, 100, 12, 2, 3, 30, 4, 5, 8, 'a', 'a1', 'bc', 'c1', 'ca', 'cb', 'cc', 'ea', 'ef']

drr.sort((a, b) => a - b)

var drr = [10, 5, 2, 8, 1, 100, 30, 12, 4, 3]
drr.sort((a, b) => a - b)
console.log(drr);// [1, 2, 3, 4, 5, 8, 10, 12, 30, 100]

err.sort((a, b) => a.first_name.localeCompare(b.first_name))

var err = [
    {
     first_name: 'a', last_name: 'a_a' },
    {
     first_name: 'cc', last_name: 'cc_cc' },
    {
     first_name: 'ef', last_name: 'ef_ef' },
    {
     first_name: 'cb', last_name: 'cb_cb' },
    {
     first_name: 'ca', last_name: 'ca_ca' },
    {
     first_name: 'ea', last_name: 'ea_ea' },
    {
     first_name: 'bc', last_name: 'bc_bc' },
];
err.sort((a, b) => a.first_name.localeCompare(b.first_name))
console.log(err); 
 [{
    …}, {
    …}, {
    …}, {
    …}, {
    …}, {
    …}, {
    …}]
 0: {
    first_name: 'a', last_name: 'a_a'}
 1: {
    first_name: 'bc', last_name: 'bc_bc'}
 2: {
    first_name: 'ca', last_name: 'ca_ca'}
 3: {
    first_name: 'cb', last_name: 'cb_cb'}
 4: {
    first_name: 'cc', last_name: 'cc_cc'}
 5: {
    first_name: 'ea', last_name: 'ea_ea'}
 6: {
    first_name: 'ef', last_name: 'ef_ef'}
 length: 7

总体代码如下：

<!DOCTYPE html>
<html lang="en">
<body>
    <script> var arr = ['a', 'cc', 'ef', 'cb', 'ca', 'ea', 'bc'] arr.sort() console.log(arr); // ['a', 'bc', 'ca', 'cb', 'cc', 'ea', 'ef'] </script>
    <script> var brr = [10, 5, 2, 8, 1, 100, 30, 12, 4, 3] brr.sort() console.log(brr);// [1, 10, 100, 12, 2, 3, 30, 4, 5, 8] </script>
    <script> var crr = [10, 5, 2, 8, 1, 100, 30, 12, 4, 3] crr.sort((a, b) => a - b) console.log(crr);// [1, 2, 3, 4, 5, 8, 10, 12, 30, 100] </script>
    <script> var drr = [ {
       first_name: 'a', last_name: 'a_a' }, {
       first_name: 'cc', last_name: 'cc_cc' }, {
       first_name: 'ef', last_name: 'ef_ef' }, {
       first_name: 'cb', last_name: 'cb_cb' }, {
       first_name: 'ca', last_name: 'ca_ca' }, {
       first_name: 'ea', last_name: 'ea_ea' }, {
       first_name: 'bc', last_name: 'bc_bc' }, ]; drr.sort((a, b) => a.first_name.localeCompare(b.first_name)) console.log(drr);//  </script>
</body>
</html>