如何迭代Array.prototype函数

Question

I want to wrap all Array functions in array object, but in console

>>> Array.prototype
[]
>>> [].prototype
undefined

but when I type Array.prototype in console it show all functions in autocomple, how can I get those functions? Where are they hidden?

Answer 1

do you mean:

var arrObj = Object.getOwnPropertyNames(Array.prototype);
for( var funcKey in arrObj ) {
   console.log(arrObj[funcKey]);
}

Answer 2

Using ECMAScript 6 (ECMAScript 2015), you can simplify a bit:

for (let propName of Object.getOwnPropertyNames(Array.prototype)) {
   console.log(Array.prototype[propName]);
}

Answer 3

var proto = Array.prototype;

for (var key in proto) {
    if (proto.hasOwnProperty(key)) {
        console.log(key + ' : ' + proto[key]);
    }
}

demo.

And if you want to check its property in console.

Use: console.dir(Array.prototype);

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