var arr = [];
arr.toString = = Object.prototype.toString / / false
var arr = [];
arr.toString = = Object.prototype.toString / / false
Array rewrote toString
[] .toString = Array.prototype.toString
arr.toString=Array.prototype.toString
true
because this is an array. You can assume that the array inherits the prototype chain of the object, but rewrites some functions, so it can't be relative. Similarly, can you tostring an object the same as an array tostring
although Array inherits the toString method of Object , it is generally rewritten with its own characteristics
var arr = [];
var reg = /sdsd/;
Object.prototype.toString.call(arr); //"[object Array]"
Object.prototype.toString.call("sss");//"[object String]"
Object.prototype.toString.call("reg");//"[object RegExp]"[].constructor= Array() { [native code] }
{}.constructor= Object() { [native code] }
o ...
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