Editing 值互换不用第三方变题的前提

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	<title>值互换 不用第三方变题的前提</title>
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var a = 10, b = 15;
console.debug(`原始值 ${a} ${b}`);
[b, a] = [a, b];
console.debug(`替换后 ${a} ${b}`)

var x = 50, y = 100;
console.debug(`原始值 ${x} ${y}`);
x = y + (y = x) * 0;
console.debug(`替换后 ${x} ${y}`)

var i = 1, j = 2;
console.debug(`原始值 ${i} ${j}`);
i = i + j;
j = i - j;
i = i - j;
console.debug(`替换后 ${i} ${j}`)