I have the following object:
{English: 4, Math: 5, CompSci: 6}
How can I convert it to an array of objects, like:
[{English: 4}, {Math: 5}, {CompSci: 6}]
Can't find the answer anywhere. Thanks!!
Use
Array#forEach
overObject.keys(YOUR_OBJECT)
var input = { English: 4, Math: 5, CompSci: 6 }; var op = []; Object.keys(input).forEach(function(key) { var obj = {}; obj[key] = input[key]; op.push(obj); //push newly created object in `op`array }); console.log(op);
With newer JS, you could take Object.entries
and map single properties.
var object = { English: 4, Math: 5, CompSci: 6 }, array = Object.entries(object).map(([k, v]) => ({ [k]: v })); console.log(array);
Just loop over each of the keys in the object.
var oldObject = {English: 4, Math: 5, CompSci: 6}; var newArray = []; // Loop over each key in the object for (var key in oldObject) { // Create a temp object var temp = {}; // Set the key of temp temp[key] = oldObject[key] // Push it to the array newArray.push(temp); } console.log(newArray)
you can directly assign object by {}
but you must use []
quote for key value if not that will not worked
var obj = {English: 4, Math: 5, CompSci: 6};
var n_obj = [];
for(var i in obj){
n_obj.push({[i]:obj[i]});
}
console.log(n_obj);
You can turn the object into an array of key-value pairs using Object.entries
and then map this array to smaller object created using Object.fromEntries
from each individual key-value pair (the key part here is the wrapping in another array before passing to fromEntries
):
Object.entries(obj).map(e => Object.fromEntries([e]))
The reverse way is similar: We create a big object using Object.fromEntries
, and we pass in an array of key-value pairs. This array is created by flat-mapping (ie eliminating on extra layer of arrays) the array of objects to an array of key-value pairs we get from calling Object.entries
on each small object. The key here is the flat -mapping, without it we would get an array of arrays of key-value pairs because we added that extra layer in the other conversion to separate the properties.
Object.fromEntries(arr.flatMap(o => Object.entries(o)))
You can use JSON.stringify()
, String.prototype.match()
with RegExp
/".*"\\:.*(?=,|})/
, String.prototype.split()
with RegExp
/,/
, Array.prototype.join()
with parameter "},{"
, JSON.parse()
var obj = {English: 4, Math: 5, CompSci: 6}; var res = JSON.parse("[{" + JSON.stringify(obj) .match(/".*"\\:.*(?=,|})/g)[0] .split(/,/) .join("},{") + "}]"); console.log(res);
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