有趣的各种语言交换2个变量的方法

javascript es6

var a = 1, b = 2
[a, b] = [b, a]

php

$a = 1;
$b = 2;
list($a, $b) = [$b, $a];

python

a, b = 1, 2
a, b = b, a

go

a, b := 1, 2
a, b = b, a