/TypeScript/Array of objects create common key as a property and create array of objects

Array of objects create common key as a property and create array of objects

var data = [{ message: 'This is a test', from_user_id: 123, to_user_id: 567 }, { message: 'Another test.', from_user_id: 123, to_user_id: 567 }, { message: 'A third test.', from_user_id: '456', to_user_id: 567 }],
    groups = Object.create(null),
    result;

data.forEach(function (a) {
    groups[a.from_user_id] = groups[a.from_user_id] || [];
    groups[a.from_user_id].push(a);    
});

result = Object.keys(groups).map(function (k) {
    var temp = {};
    temp[k] = groups[k];
    return temp;
});

console.log(result);

Source: stackoverflow.com

Similar codes

0 vote263 views2 answers
Drop a column if it exists from dataframe
TypeScript
0 vote266 views1 answer
Conditional type typescript
TypeScript
1 vote267 views1 answer
Andonis many to many attach
TypeScript
0 vote296 views1 answer
How to pass data between requests in api
TypeScript
2 votes271 views2 answers
Laravel get all inputs from request
TypeScript
8 votes275 views3 answers
Futter Rounded Button
TypeScript
0 vote303 views1 answer
Material ui styled components with theme
TypeScript
1 vote297 views1 answer
(change) on select not working in mat-select
TypeScript
4 votes276 views1 answer
How to add an element to a Typescript array
TypeScript
0 vote262 views1 answer
C code for insrting elements in set
TypeScript