Merging array of objects [duplicate]

Question

I want to merge two array of objects. Following are the two arrays:-

let listing=[
{name:'name1',age:14,email:'[email protected]'},
{name:'name2',age:15,email:'[email protected]'},
{name:'name3',age:13,email:'[email protected]'},
{name:'name4',age:12,email:'[email protected]'},
{name:'name5',age:15,email:'[email protected]'},
{name:'name6',age:16,email:'[email protected]'},
{name:'name7',age:12,email:'[email protected]'},
{name:'name8',age:16,email:'[email protected]'},
{name:'name2',age:15,email:'[email protected]'},
{name:'name9',age:17,email:'[email protected]'},
]

let info=[
{name:'name1',class:7,roll_no:4},
{name:'name3',class:6,roll_no:10},
{name:'name2',class:8,roll_no:2},
{name:'name5',class:8,roll_no:18},
{name:'name6',class:9,roll_no:23},
{name:'name7',class:5,roll_no:9},
{name:'name8',class:9,roll_no:13},
{name:'name2',class:8,roll_no:4},
{name:'name8',class:9,roll_no:13},
{name:'name2',class:8,roll_no:4},
]

Output should be in this form:-

let resultant_array=[
    {name:'name1',age:14,email:'[email protected]',class:7,roll_no:4},
    {name:'name2',age:15,email:'[email protected]',class:8,roll_no:2},
    {name:'name3',age:13,email:'[email protected]',class:6,roll_no:10},
    {name:'name5',age:15,email:'[email protected]',class:8,roll_no:18},
    {name:'name6',age:16,email:'[email protected]',class:9,roll_no:23},
    {name:'name7',age:12,email:'[email protected]',class:5,roll_no:9},
    {name:'name8',age:16,email:'[email protected]',class:9,roll_no:13},
    {name:'name2',age:15,email:'[email protected]',class:8,roll_no:4},
    {name:'name8',age:16,email:'[email protected]',class:9,roll_no:13},
    {name:'name2',age:15,email:'[email protected]',class:8,roll_no:4},
    ]

I want that all the objects specified in info array where name is same in both the objects should be included in new array and the objects should be inserted in the same format as listing array.

resultant_array=listing.map(x => Object.assign(x, info.find(y => y.name== x.name))); displays only first match. If i use filter then all the matched objects are inserted in one element only.

Anatoly · Accepted Answer · 2020-05-10 18:29:36Z

0

const result = []
listing.forEach(x => {
  result.push(Object.assign(x, info.find(y => y.name== x.name) || {}))
})

answered May 10, 2020 at 18:29

Anatoly

23.2k3 gold badges33 silver badges46 bronze badges

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

Comments

Brian Patterson · Accepted Answer · 2020-05-10 18:35:22Z

0

This will work on any number of matching keys, without having specify the object property you are trying to match.

let resultant_array = listing.map((item, i) => Object.assign({}, item, info[i]));

answered May 10, 2020 at 18:35

Brian Patterson

1,6252 gold badges16 silver badges31 bronze badges

Collectives™ on Stack Overflow

Merging array of objects [duplicate]

2 Answers 2

Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Linked

Related