Declaring a javascript array of infinite objects

Question

How can I declare a JavaScript object which can hold infinite amount of values like given below? I am new to Javascript.

var activities = [
  {
    subject: "",
    genre :"",
    username: "",
    aboutuser: ""
  },
  {
    subject: "",
    genre :"",
    username: "",
    aboutuser: ""
  },
  {
    subject: "",
    genre :"",
    username: "",
    aboutuser: ""
  },
  ...
]

You don't have to predeclare the size of any variable in javascript; just declare an empty array and you can push onto it as many times as you like. — Daniel Beck
– Daniel Beck, Commented Dec 3, 2017 at 18:49
Probably arbitrary rather than infinite - your clients only have so much RAM. — jonrsharpe
– jonrsharpe, Commented Dec 3, 2017 at 18:50
Arrays are a dynamically sized type in JS. Do you actually need Array storage, or do you just need a type that will continuously generate them in a loop? What's the actual usage here? — user8897421
– user8897421, Commented Dec 3, 2017 at 18:52
You can declare an empty array: var arr = []; then use a for loop and push as many object as you want: for(var i = 0; i < 10; i++) { arr.push( { /* ... */ } ); }. (this adds 10 objects). — ibrahim mahrir
– ibrahim mahrir, Commented Dec 3, 2017 at 18:53
Are you looking for something like "infinite lists" using lazy evaluation? — user8897421
– user8897421, Commented Dec 3, 2017 at 18:55

Pato Salazar · Accepted Answer · 2017-12-03 18:59:08Z

2

Like this:

  let myArray = []

  myArray.push({
    subject: "",
    genre :"",
    username: "",
    aboutuser: ""
  })

Just define an empty array and push the object into it as many times you need.

answered Dec 3, 2017 at 18:59

Pato Salazar

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2 Comments

Pato Salazar Over a year ago

no problem. Just mark the answer as correct for other people future reference. Happy Coding

D4NT3 Over a year ago

thats still definite ;D Some other solution for this?

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