How to do a sort and a filter for a javascript array of objects [duplicate]

Question

if an object array has the following attributes type, age and gender eg

[{type: 0, age: 15, gender: "male"}, 
{type: 0, age: 16, gender: "female"}, 
{type: 0, age: 17, gender: "male"}]

what is the best way to do a filter and sort such that the object with the highest age (sort part) with type = 0 and gender= male (filter part) will be returned (in this instance {type: 0, age: 17, gender: "male"})

so it first have to do a filter by type = 0 and gender = male then do a sort to get the highest age for all objects that fit the criteria

what is the best way to do a filter and sort? array.filter and array.sort — Rajesh Dixit
– Rajesh Dixit, Commented May 23, 2017 at 12:28

Nina Scholz · Accepted Answer · 2017-05-23 12:45:29Z

4

Assuming, you want the oldest male with type equals zero, you could filter first and the sort by age descending. Take the first object as result.

var array = [{type: 0, age: 15, gender: "male"}, {type: 0, age: 16, gender: "female"}, {type: 0, age: 17, gender: "male"}],
    result = array.filter(function (a) {
        return a.type === 0 && a.gender === 'male';
    });

result.sort(function (a, b) { return b.age - a.age; });
console.log(result[0]);

edited May 23, 2017 at 12:45

answered May 23, 2017 at 12:30

Nina Scholz

388k26 gold badges367 silver badges417 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Rajesh Dixit · Accepted Answer · 2017-05-23 12:36:14Z

0

Assuming that you want the object with type=0 and max age, you do not need to filter or sort.

Just loop through list and check if type is 0, then compare age and return the one with max

Note: This is only applicable if you want to fetch one item. It can be scaled for few finite elements but not for generic number

var array = [{type: 0, age: 15, gender: "male"}, {type: 0, age: 16, gender: "female"}, {type: 0, age: 17, gender: "male"}],
  result = array.reduce(function (p,c) {
    if(p.type === 0 && c.type === 0){
      return p.age > c.age ? p : c;
    }
    return p;
  });
console.log(result);

answered May 23, 2017 at 12:36

Rajesh Dixit

25k5 gold badges52 silver badges86 bronze badges

Collectives™ on Stack Overflow

How to do a sort and a filter for a javascript array of objects [duplicate]

2 Answers 2

Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Linked

Related