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javascript group by key

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Successful Snail answered on August 5, 2019 Popularity 10/10 Helpfulness 7/10

answer javascript group by key

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javascript group by key

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var cars = [{ make: 'audi', model: 'r8', year: '2012' }, { make: 'audi', model: 'rs5', year: '2013' }, { make: 'ford', model: 'mustang', year: '2012' }, { make: 'ford', model: 'fusion', year: '2015' }, { make: 'kia', model: 'optima', year: '2012' }],
    result = cars.reduce(function (r, a) {
        r[a.make] = r[a.make] || [];
        r[a.make].push(a);
        return r;
    }, Object.create(null));

console.log(result);

Popularity 10/10 Helpfulness 7/10 Language javascript

Source: stackoverflow.com

Tags: group-by javascript key

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Contributed on May 16 2020

Successful Snail

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javascript group array by key

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function groupArrayOfObjects(list, key) {
  return list.reduce(function(rv, x) {
    (rv[x[key]] = rv[x[key]] || []).push(x);
    return rv;
  }, {});
};

var people = [
    {sex:"Male", name:"Jeff"},
    {sex:"Female", name:"Megan"},
    {sex:"Male", name:"Taylor"},
    {sex:"Female", name:"Madison"}
];
var groupedPeople=groupArrayOfObjects(people,"sex");
console.log(groupedPeople.Male);//will be the Males 
console.log(groupedPeople.Female);//will be the Females

Popularity 10/10 Helpfulness 9/10 Language javascript

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Contributed on Aug 05 2019

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0 Answers Avg Quality 2/10

javascript group by key

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result = array.reduce((h, obj) => Object.assign(h, { [obj.key]:( h[obj.key] || [] ).concat(obj) }), {})

Popularity 10/10 Helpfulness 5/10 Language javascript

Source: stackoverflow.com

Tags: group-by group-b

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Contributed on May 16 2020

Successful Snail

0 Answers Avg Quality 2/10

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