Brackets Like Array in javascript

Question

Hellow guys am a newbie in javascript .I have seen some code like this ..

function f() {

    var model = this.model.attributes;

    var data = {
        path: Config.baseUrl,
        lang: url.segment(1),
        id: model['id'],
        date: model['date'],
        views: model['views'],
        author: model['author'],
        authorName: model['authorName'],
        question: model['question'],
        answer: model['answer'],
        rate: model['rate'],
        _ : _,
        S: S,
        moment: moment
    };

I just need to know model['id'] model['views'] etc etc ..i just need to know the use of id,date,views author here .In php its like array and key but is it the same concept in jaavascript too ..Any help would be greatly appreciated thanks .:)

model['date'] is like writing model.date : it's written either object['property'] or object.property — frenchie, Feb 07 '14 at 14:17
Its called [__Bracket notation__](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Member_Operators#Bracket_notation) — Satpal, Feb 07 '14 at 14:18

score 0 · Accepted Answer · answered Feb 07 '14 at 14:18

0

With views: model['views'],

You declare views equal to the views attribute of the model element.

And so on with the others

answered Feb 07 '14 at 14:18

laaposto

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didnt get ?..so is model a fixed varibale term here ? – william Feb 07 '14 at 14:25
Yes model is somewhere outside the func. In the function is a fixed variable – laaposto Feb 07 '14 at 14:30
so can we use any other term instead of model for this same purpose ? – william Feb 07 '14 at 14:31
You can use any term you want as soon as it is declared somewhere outside the function. It is like other variables – laaposto Feb 07 '14 at 14:34

score 0 · Answer 2 · answered Feb 07 '14 at 14:24

0

The use of this is one thing to watch out for. The model variable inside f is being assigned to a model property outside the function. So look for model in the outer object to figure out where that stuff is coming from.

answered Feb 07 '14 at 14:24

beautifulcoder

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is model a fixed term ?..i just need to know that ... – william Feb 07 '14 at 14:28
No, `this` is a moving target in javascript. You have to study the hierarchy of objects to find out where it is coming from. – beautifulcoder Feb 07 '14 at 14:29
can you give me a link to study all these ?..can we use any other tem insted of model for this purpose .. – william Feb 07 '14 at 14:35

Brackets Like Array in javascript

2 Answers2