CODEWITHSUNDEEP
javascriptarrays
Saurya
Saurya

Reputation: 51

Access array inside an object

 var b = {
  maths:[12,23,45],
  physics:[12,23,45],
  chemistry:[12,23,45]
};

I want to access array in object b. ie, maths, physics, chemistry . This may be a simple question but i am learning....Thanks

Upvotes: 4

Views: 27050

Answers (6)

Amaru Zarate
Amaru Zarate

Reputation: 1

If you ever need to access an array inside of an array, try this.

var array2 = ["Bannana", ["Apple", ["Orange"], "Blueberries"]];
array2[1, 1, 0];
console.log(array2[1][1][0]);

Here I am saying to go inside the inner most array and pull what is in place 0.

Upvotes: 0

Roli Agrawal
Roli Agrawal

Reputation: 2466

var b = {
    maths:[12,23,45],
    physics:[12,23,45],
    chemistry:[12,23,45]
};

// using loops you can do like
for(var i=0;i<b.maths.length;i++){
      console.log(b.maths[i]);//will give all the elements
}

Upvotes: 1

Jonathan Muller
Jonathan Muller

Reputation: 7516

Given the arrays in the object b (note that you have a syntax error in the code you provided)

var b = {
  maths: [12, 23, 45],
  physics: [12, 23, 45],
  chemistry: [12, 23, 45]
};

maths, physics, and chemistry are called properties of the object stored in variable b

You can access property of an object using the dot notation:

b.maths[0]; //get first item array stored in property maths of object b

Another way to access a property of an object is:

b['maths'][0]; //get first item array stored in property maths of object b

Upvotes: 6

Bast Ounet
Bast Ounet

Reputation: 11

You need to set the variable b like this : 

var b = {
  maths:[12,23,45],
  physics:[12,23,45],
  chemistry:[12,23,45]
};

Then you can access your arrays inside b by using b.maths, b.physics and b.chemistry.

Upvotes: 0

bln
bln

Reputation: 320

var b = {
    maths:[12,23,45],
    physics:[12,23,45],
    chemistry:[12,23,45]
};

console.log(b.maths);
// or
console.log(b["maths"]);
// and
console.log(b.maths[0]); // first array item

Upvotes: 4

Legendary
Legendary

Reputation: 2242

there are simple: 

b = {
      maths:[12,23,45],
      physics:[12,23,45],
      chemistry:[12,23,45]
    };

b.maths[1] // second element of maths
b.physics
b.chemistry

Upvotes: 0

Related Questions