为什么JavaScript中没有逻辑xor？ [英] Why is there no logical xor in JavaScript?

问题描述

为什么JavaScript中没有逻辑xor？

Why is there no logical xor in JavaScript?

推荐答案

JavaScript将其祖先追溯到C，C没有逻辑XOR运算符。主要是因为它没用。 Bitwise XOR非常有用，但在我多年的编程中，我从未需要逻辑XOR。

JavaScript traces its ancestry back to C, and C does not have a logical XOR operator. Mainly because it's not useful. Bitwise XOR is extremely useful, but in all my years of programming I have never needed a logical XOR.

如果你有两个布尔变量，你可以模仿XOR：

If you have two boolean variables you can mimic XOR with:

if (a != b)

使用两个任意变量，您可以使用！将它们强制转换为布尔值，然后使用相同的技巧：

With two arbitrary variables you could use ! to coerce them to boolean values and then use the same trick:

if (!a != !b)

虽然这很晦涩，但肯定值得评论。实际上，你甚至可以在这一点上使用按位XOR运算符，虽然这对我来说太聪明了：

That's pretty obscure though and would certainly deserve a comment. Indeed, you could even use the bitwise XOR operator at this point, though this would be far too clever for my taste:

if (!a ^ !b)

这篇关于为什么JavaScript中没有逻辑xor？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！