Javascript 如何在Javascript中获取变量的相反布尔值
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时间：2020-08-23 11:13:30 来源:igfitidea点击:
How to get opposite boolean value of variable in Javascript
提问by s.webbandit
var a = true;
How to get opposite value of a(false) and vice versa?
如何获得a（false）的相反值，反之亦然？
回答by zetlen
回答by richardaday
>>> a = true;
true
>>> !a;
false
回答by Ahmed Roshdy
This would be much easier
这会容易得多
var b = !a
This would make true a false and false a true
这将使真成为假，假成为真
回答by Dmitriy Apollonin
Try the following:
请尝试以下操作：
var a = !a;
回答by Alcides Queiroz Aguiar
Use the "not" operator
使用“非”运算符
var a = true;
alert(!a); //=>false
回答by Charlie
Something like this, perhaps;
也许是这样的；
function toggleFlag(value){
var toggle = value ? false : true;
return toggle;
}
var a = true;
a = toggleFlag(a);
回答by Ratan Uday Kumar
Try like Below
尝试如下
var Boolify = require('node-boolify').Boolify;
var opp_var = !Boolify(myVar);
Refer node-boolify
