JavaScript merge array of objects by key (es6)
In this post we will give you information about JavaScript merge array of objects by key (es6). Hear we will give you detail about JavaScript merge array of objects by key (es6)And how to use it also give you demo for it if it is necessary.
we are going to learn about how to merge an array of objects by usingkey in JavaScript.
Suppose we have two array of objects with the same key.
Example:
const arr1 =[ {id:1,name:"sai"}, {id:2,name: "King"}];const arr2 = [ {id:1,age:23}, {id:2,age:24}];Now we need to merge the two array of objects into a single array by using id property because id is the same in both array objects.
Note: Both arrays should be the same length to get a correct answer.
First way
Here we are the using map method and Object.assign method to merge the array of objects by using id.
function mergeArrayObjects(arr1,arr2){ return arr1.map((item,i)=>{ if(item.id === arr2[i].id){ //merging two objects return Object.assign({},item,arr2[i]) } })}console.log(mergeArrayObjects(arr1,arr2));Output:
[ {id: 1, name: "sai", age: 23}, {id: 2, name: "King", age: 24}]Second way
In this example, we are using while loop to loop over through the array of objects and merging the objects using spread operator.
function mergeArrayObjects(arr1<span>,arr2){ let start = 0; let merge = []; while(start < arr1.length){ if(arr1[start].id === arr2[start].id){ //pushing the merged objects into array merge.push({...arr1[start],...arr2[start]}) } //incrementing start value start = start+1 } return merge;}Hope this code and post will helped you for implement JavaScript merge array of objects by key (es6). if you need any help or any feedback give it in comment section or you have good idea about this post you can give it comment section. Your comment will help us for help you more and improve us. we will give you this type of more interesting post in featured also so, For more interesting post and code Keep reading our blogs