有没有办法以公共值作为键创建 object 并将公共对象分配为数组值？

Question

Let's say i have an array of four objects

var data = [
   {a: 1, b: 2}, 
   {a: 2, b: 4}, 
   {a: 1, b: 6}, 
   {a: 2, b: 9}
];

And i want to create an object say Taking common value and passing it as key and assigning the value ob common objects to an array like below

Const treat = {

    1:[{a:1,b:2} {a:1,b:6}],
    2:[{a:2,b:4} {a:2,b:9}]

}

Answer 1

Here is a version of what you want. You can research different array methods such as reduce to see other ways to obtain similar results.

 var data = [{ a: 1, b: 2 }, { a: 2, b: 4 }, { a: 1, b: 6 }, { a: 2, b: 9 } ]; function sortData() { var sortedData = {}; data.forEach(sample => { // Need to check if the array for the sample has been created since we cannot "push" to "undefined". if (sortedData[sample.a]) { sortedData[sample.a].push(sample); } else { sortedData[sample.a] = [sample]; } }); return sortedData; } console.log(sortData());