"foo" instanceof String //=> false
"foo" instanceof Object //=> false
true instanceof Boolean //=> false
true instanceof Object //=> false
false instanceof Boolean //=> false
false instanceof Object //=> false
12.21 instanceof Number //=> false
/foo/ instanceof RegExp //=> true
// the tests against Object really don't make sense
数组文字和对象文字匹配.
[0,1] instanceof Array //=> true
{0:1} instanceof Object //=> true
Why don't all of them? Or, why don't they all not?
And, what are they an instance of, then?
在FF3、IE7、Opera和Chrome中也是如此.所以,至少是一致的.