- var num1 = 1;
- var bool1 = !!num1;
- var num2 = -1;
- var bool2 = !!num2;
- var num3 = 0;
- var bool3 = !!num3;
- console.log(bool1); //true
- console.log(bool2); //true
- console.log(bool3); //false
- //该片段来自于http://www.codesnippet.cn/detail/2209201513726.html
来源: http://www.codesnippet.cn/detail/2209201513726.html