How to sort array in JSON to get value of specific index?

Question

Hi I am very new to JSON and API, and working on an API in which I am getting value in an array eg.

{
   id: 0,
   text: "one"
}
{
   id: 1,
   text: "two"
}
{
   id: 2,
   text: "three"
}

I want the value of only of an array where id=0 and i don't know how to sort array in JSON to achieve this, I used ajax to fetch this value

async function getDataFromId() {
    let url = 'API_URL';
    let Qid = 1;
    let result;
    try {
        result = await jQuery.ajax({
            url: url,
            type: 'GET',
            contentType: 'application/json',
        });
        result = result.sort((a, b) => a.id- b.id);
        console.log(result)
    }catch (error) {
        console.error(error);
    }
}

Why do you need to sort it if you only want the value where id=0? Wouldn't filter it be enough? — Turtlean
– Turtlean, Commented Dec 11, 2020 at 4:52
@Turtlean I am sorry this is very noob thing but, how to filter? — dev
– dev, Commented Dec 11, 2020 at 4:53
Try this : var new_array = result.filter(function(i){return i.id == 0}) — Swati
– Swati, Commented Dec 11, 2020 at 4:56

JustRaman · Accepted Answer · 2020-12-11 04:56:50Z

2

You don't need to sort the array to get object where id == 0. Use Array#find to find you desire object.


let myObject = myArr.find((_o)=>_o.id === 0);

answered Dec 11, 2020 at 4:56

JustRaman

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sonEtLumiere · Accepted Answer · 2020-12-11 04:58:46Z

2

Maybe this:

if(result){
  resultSorted = result.sort((a, b) => a.id - b.id);
  resultFiltered = result.filter(x => x.id == 0);
}

answered Dec 11, 2020 at 4:58

sonEtLumiere

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Comments

Turtlean · Accepted Answer · 2020-12-11 05:05:29Z

2

I want the value of only of an array where id=0

You're properly sorting the result in ascendant order according to their ID's, so the only thing left is creating an array that only contains the first element:

result = result.sort((a, b) => a.id- b.id)
console.log([result[0])

You can take advantage of the condition that you are after to filter the array. In this case: id === 0. That will remove the elements that doesn't match the condition (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter):

result = result.filter((a) => a.id === 0)
console.log(result)

Bear in mind that sorting an array is more expensive that just filtering it, so if you're only interested in keeping the one with id === 0 I'd definitely go for the filter option

edited Dec 11, 2020 at 5:05

answered Dec 11, 2020 at 4:59

Turtlean

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Comments

Mohit Chandel · Accepted Answer · 2020-12-11 05:20:20Z

1

All the above answers are good but you are using a variable Qid

result = result.filter(function(i){return i.id === Qid});
console.log(resulr)

You don't need to sort it you can filter this, That will be more easy stuff for your work

edited Dec 11, 2020 at 5:20

answered Dec 11, 2020 at 5:15

Mohit Chandel

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