JavaScript Basics: Reflect.apply

in #javascript3 years ago

The method Reflect.apply is just a better and more meaningful way to do Function.prototype.apply. In other words, it allows you to call the given function using a specified context (this argument) on an array of arguments. Here is an example:

    let person = {
        name: "John",
        speak(city) {
            console.log(`Hi. I am ${this.name}. I am calling from ${city}.`);
        },
    };

    let someone = {
        name: "Jack",
    };

    person.speak("Houston");
    // Hi. I am John. I am calling from Houston.
    
    Reflect.apply(person.speak, someone, ["Boston"]);
    // Hi. I am Jack. I am calling from Boston.
    person.speak.apply(someone, ["Boston"]); // the same
    Function.prototype.apply.call(person.speak, someone, ["Boston"]); // the same

As I said in an earlier post, the Reflect object gathers all functionality related to reflection in one place. This makes it possible to write neater and more readable code.


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Last line is really interesting...
Function.prototype.apply.call
Was not aware it works that way. Actually:

Function.prototype.call === Function.prototype.bind.call.apply.bind.call

So it seem that Function.prototype functions (Function.prototype.bind, Function.prototype.call, etc.) do have object linkage to Function.prototypeobject. We can even access such linkage. See here:
Function.prototype.apply.__proto__ === Function.prototype

That's why we can chain it deeply. Really interesting. Also was not aware of such Reflect feature. Thanks for sharing.

Thank you for your informative reply.

I didn't understood

Informative post.

Good post, thanks for sharing this post.

nice post bro

Have a nice day sir, Stay safe.

Hi I'm duma, I'm calling from Indonesia :)

sir as a new steemers i want your help by my post

Looks like i still need to learn a lot of programming :)
but many thanks for sharing it

I am not so good in javascript but this is informative 😊

person.speak("thanks for the post, this will Reflect in future coding of mine");

great post, ghasemkiani as usual!

مشتی ساپورت ♥

another interesting information about reflect , thanks

cool post. i am also a js developer from time to time

it's very informative post.

That's a great gaming programming...Keep it up...

it so helpful post for us......
thanks for sharing.

well thanks for sharing .. learning have a nice day bro

programing is a language of computer you input this his language and its output your language
now its a very important in every sphere
carry on

That's a great and outstanding programming ..Resteemit done..

Thanks for this post, very informative i hope you keep sharing with us all your knowledge

Thank you for sharing and teaching others sir..

Thanks for giving us a new topic.It is an educative value for us.We can get many concept about javascript,programming & so on.
Thanks
@Ressteem,upvote & follow done.

Thanks for sharing this post.
I appreciate your every post ..Best of luck.

@ghasemkiani Good tutorial. I just love this. Thanks for sharing.

Upvote and resteemit...

you are a good javascript programmer. well done @ghasemkiani

javascript is a advance programming language . i try c language as a begainer

Nice post sir.

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This nice post iappreciate your programming thanks for sharing this technology..Carry on..

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Followed you..

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Carry on your activitys

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add-on on the Reflect post, thanks,

Thanks for share JavaScript

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