How to Compare and get the values two Array of objects?

Question

I have two Array of objects as follows.

Array of object 1 ----> [{locationId:1,locationName:"Bangalore"},{locationId:2, locationName:"Mumbai"}]
Array of object 2 -----> [{baseId:1,baseUnit:"abc"},{baseId:2,baseUnit:""}]

Is there any short method where I can locationName from first Array, using baseId from Array 2 and push that to new Array of objects,in angular 6. I dont want to use for loop.

Please visit the help center, take the tour to see what and How to Ask. Do some research, search for related topics on SO; if you get stuck, post a minimal reproducible example of your attempt, noting input and expected output. — mplungjan
– mplungjan, Commented Jul 4, 2018 at 7:24

Venomy · Accepted Answer · 2018-07-04 07:25:28Z

1

The following code should do what you need (comments in code)

// Go throught first array
newArray = array1.map(location => {
    // Look for corresponding object in second array based on Ids
    const foundBase = array2.find(base => base.baseId === location.locationId);
    // If the object is found, return combined object
    if(foundBase){
        return Object.assign(location, foundBase);
    }
});

answered Jul 4, 2018 at 7:25

Venomy

2,24419 silver badges26 bronze badges

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

Comments

mplungjan · Accepted Answer · 2018-07-04 07:25:46Z

1

var a = [{locationId:1,locationName:"Bangalore"},{locationId:2, locationName:"Mumbai"}];
    var b = [{baseId:1,baseUnit:"abc"},{baseId:2,baseUnit:""}]
    var c = [];

a.map(obj => {
  b.map(res => {
    if (obj.locationId == res.baseId) {
      c.push({
        "locationName": obj.locationName,
        "baseUnit": res.baseUnit
      });
    }
  });
});


console.log(c);

edited Jul 4, 2018 at 7:25

mplungjan

180k29 gold badges183 silver badges246 bronze badges

answered Jul 4, 2018 at 7:25

Pardeep Jain

86.9k38 gold badges172 silver badges220 bronze badges

Comments

andria_girl · Accepted Answer · 2018-07-04 07:41:17Z

1

Reduce your arrays

Here you can see that it is possible to use .reduce on an Array to iterate over the array whilst generating a new one:

let array1 = [{locationId:1,locationName:"Bangalore"},{locationId:2, locationName:"Mumbai"}]
let array2 = [{baseId:1,baseUnit:"abc"},{baseId:2,baseUnit:""}]

// Combine objects in array
array1.reduce((newArray, _, index) => newArray.concat({...array1[index], ...array2[index]}), [])

answered Jul 4, 2018 at 7:41

andria_girl

5,1053 gold badges28 silver badges41 bronze badges

Collectives™ on Stack Overflow

How to Compare and get the values two Array of objects?

3 Answers 3

Comments

Comments

Reduce your arrays

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Reduce your arrays

Comments

Your Answer

Sign up or log in

Post as a guest

Related