Converting array of objects to objects of array having similar field value

Question

var array = [{"name":"Vani","Id":"1"},{"name":"Random","Id":"1"},{"name":"Random1","Id":"2"},{"name":"Random2","Id":"2"}];

Convert to following object using reduce based on unique field value id:

var obj = {"1":[{"name":"Vani","Id":"1"},{"name":"Random","Id":"1"}],"2":[{"name":"Random1","Id":"2"},{"name":"Random2","Id":"2"}]}

Basically, you are looking for this: https://stackoverflow.com/questions/40774697/how-to-group-an-array-of-objects-by-key — Sebastian Kaczmarek, Jun 23 '20 at 05:39

score 0 · Answer 1 · answered Jun 23 '20 at 05:41

You can use .reduce() method to get the desired output:

const data = [{"name":"Vani","Id":"1"},{"name":"Random","Id":"1"},{"name":"Random1","Id":"2"},{"name":"Random2","Id":"2"}];

const result = data.reduce((r, c) => {
  r[c.Id] = r[c.Id] || [];
  r[c.Id].push(c);
  return r;
}, {});

console.log(result);

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Converting array of objects to objects of array having similar field value

1 Answers1