最干净的方式来转换为布尔值

这个问题在这里已经有了答案：

如何在JavaScript中将字符串转换为布尔值？ 71个答案

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是的，你总是可以使用这个：

var tata = Boolean(toto);

这里有一些测试：

for (var value of [0, 1, -1, "0", "1", "cat", true, false, undefined, null]) {
    console.log(`Boolean(${typeof value} ${value}) is ${Boolean(value)}`);
}

结果：

Boolean(number 0) is false
Boolean(number 1) is true
Boolean(number -1) is true
Boolean(string 0) is true
Boolean(string 1) is true
Boolean(string cat) is true
Boolean(boolean true) is true
Boolean(boolean false) is false
Boolean(undefined undefined) is false
Boolean(object null) is false

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