CODEWITHSUNDEEP
javascriptarrayssorting
user3141642
user3141642

Reputation:

Javascript: how to sort array by object value in that array?

I want sort a Array in JavaScript by value of object which is that array holding.

For example:

Input

arr = [{id:[2, 'second']},{id:[8, 'eighth']},{id:[1, 'first']}];

My excepted output is:

sorted_arr = [{id:[8, 'eighth']},{id:[1, 'first']},{id:[2, 'second']}];

Note: Please give sort by alphabet

Upvotes: 2

Views: 76

Answers (2)

Rajan Singh
Rajan Singh

Reputation: 631

You can make a compare function like this which will do as require.

arr.sort(function(a, b){
    return a["id"][0]-b["id"][0];
});

Suppose in case when both id's are equal, in that case if you want to do sorting on basis of your second parameter i.e first,second third then the code will be

arr.sort(function(a, b){
    if(a["id"][0]===b["id"][0])
    {   

        if(a["id"][1] < b["id"][1]) return -1;
        if(a["id"][1] > b["id"][1]) return 1;
        return 0;

    }
    return a["id"][0]-b["id"][0];
});

Upvotes: 2

Pranav C Balan
Pranav C Balan

Reputation: 115222

You can use sort()

arr = [{
  id: [2, 'second']
}, {
  id: [4, 'fourth']
}, {
  id: [1, 'first']
}];

var sort = arr.sort(function(a, b) {
  return a.id[0] - b.id[0];
});

document.write('<pre>' + JSON.stringify(sort, null, 3) + '</pre>');

If you want to sort based on the word in array then you need to compare the values

arr = [{
  id: [2, 'second']
}, {
  id: [4, 'fourth']
}, {
  id: [1, 'first']
}];

var sort = arr.sort(function(a, b) {
  if (a.id[1] > b.id[1]) return 1;
  if (a.id[1] < b.id[1]) return -1;
  return 0;
});

document.write('<pre>' + JSON.stringify(sort, null, 3) + '</pre>');

Upvotes: 1

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