什么！1和！0在Javascript中意味着什么？

问题描述

在JavaScript文件中我不得不今天读到，有一行变量被声明为阶乘，如下所示：

In a JavaScript file I had to read today, there was a line where a variable was declared like a factorial, like this :

var myVariable = !1;

然后在这样的函数中使用类似的东西作为参数：

and then something similar was used as parameter in a function like this :

return variable.myFunction(!0);

任何人都可以解释一下感叹号在这种情况下的含义，并最终解释为什么这通常用于（福利）？

Can anyone explain me what the exclamation mark means in this context and eventually, why this is generally used for (benefits) ?

提前谢谢！

推荐答案

！是布尔运算符。

NOT（！）：将语句从true切换为false或从false切换为true。

NOT (!): toggles a statement from true to false or from false to true.

!0 = true
!1 = false

很棒介绍布尔运算符及其在javascript中的使用。

This is a brilliant introduction to boolean operators and their use in javascript.

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