Filtering through an object and returning items through a filter

JavaScript
1

Hi Everyone

I am trying to write a function, when given a list of objects, returns the list of all active items. My array of objects would like like this

const list = [
                 { id: 1, active: true },
                 { id: 2, active: false },
                 { id: 3, active: true  },
                 { id: 4, active: false }
               ];

I would like to return a new array of objects of only those marked activie: true like so:

[
    { id: 1, active: true },
    { id: 3, active: true }
  ]

I know I need an empty array to add the objects too (i think?), loop through the object, and filter out the correct items and return them, however i am having a bit of an issue on how to go about writing this. If anyone could help me out, would really appreciate it.

Cheers

2
3

There is a filter function for arrays, which works like this

array.filter(function (element) {
    return <true condition>
});

Where you use the element to forge the condition of when you want to retrive the current element.

Good luck :slight_smile:

4

Is this all the code I would need? Or is there just a piece of the puzzle? Thanks for the tip!!

5

It’s just a piece of the puzzle indeed ! :stuck_out_tongue: You need to figure out how to use the function and what condition to put at the return.

Also, I didn’t mention it but the function filter returns a new array containing the matching elements so you can store the result :wink:

6

oh boy! alright i’ll give it a shot. Thanks so much for the help

7

I don’t think im using my function correctly?

const list = [
  { id: 1, active: true },
  { id: 2, active: false },
  { id: 3, active: true  },
  { id: 4, active: false }
];

function selectActive(list) {
  var result = list.filter(function(obj) {
    return obj.active === true; 
  }) 
}

(selectActive(list)

This would work if I didnt have a function, and just used my variable, but I am trying to do it in this function. Any direction is greatly appreciated

8

In your function you’re going to want to return the result.
And also,
(selectActive(list)

get rid of that opening parentheses
-> selectActive(list)

1 Like
9

ahhh, i stored what I wanted in my result but never returned my result.

1 Like