Transform Javascript grouped data into JSON array

Question

Using below code, I am able to group objects from my existing data with Underscore JS as shown.

{Group1: Array[10], Group2: Array[13], Group3: Array[16], Group4: Array[21], Group5: Array[38]}


//Create a category based on group assigned
var groupedData = _.groupBy(results, function (d) { 

return d.groups;

});

console.log(groupedData);

But what I really need is to turn the above into JSON array looking like:

var myData = [["Group1", 10], ["Group2",13], ["Group3",16], ["Group4",21], ["Group5",38]];

How can I adjust my code in order to get the desired result?

Thank you for your help.

Ruan Mendes · Accepted Answer · 2016-01-28 21:27:15Z

3

Use Array.map and Object.keys

var results = {
  a: [1, 2],
  b: [2, 3]
};
var grouped = Object.keys(results).map(function(key) {
  return [key, results[key].length];
});

document.body.innerHTML = JSON.stringify(grouped);

answered Jan 28, 2016 at 21:27

Ruan Mendes

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1 Comment

EBamba Over a year ago

Thanks so much Juan, this answers my question.

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