var json = [{one: "text1", two: "text2", three: 3, four: 4},
{one: "text3", two: "text4", three: 5, four: 6},
{one: "text5", two: "text7", three: 8, four: 9}]
How can I convert the array of objects above into an array of arrays below?
var array = [["text1", "text2", 3, 4],
["text3", "text4", 5, 6],
["text5", "text7", 8, 9]]
Is there an ES2015 function to help convert it easily? If not a for loop might do.
You can use map and Object.values
let array = json.map(obj => Object.values(obj));
Object.values is not ES6 though.You could use Object.values directly as callback, which is available with ES 2017
var array = [{ one: "text1", two: "text2", three: 3, four: 4 }, { one: "text3", two: "text4", three: 5, four: 6 }, { one: "text5", two: "text7", three: 8, four: 9 }],
result = array.map(Object.values);
console.log(result);A classical approach
var array = [{ one: "text1", two: "text2", three: 3, four: 4 }, { one: "text3", two: "text4", three: 5, four: 6 }, { one: "text5", two: "text7", three: 8, four: 9 }],
result = array.map(o => Object.keys(o).map(k => o[k]));
console.log(result);Object.values is not ES6. Probably fine to use, but since the OP only mentions ES2015, worth to point out at least.
In case you need to explicitly specify order, you can destructure and map each item:
var array = json.map(({ one, two, three, four }) => ([one, two, three, four]))
This would also work for unordered keys in your original object, e.g.:
var json = [{ two: "text2", one: "text1", three: 3, four: 4 },
{ one: "text3", three: 5, two: "text4", four: 6 },
{ four: 9, two: "text7", three: 8, one: "text5" }]
You can also use this code snippet -
function convertObjCollToArrColl(json) {
for (var i = 0, array = []; i < json.length; i++) {
var el = json[i];
array.push([el.one, el.two, el.three, el.four]);
}
return array;
}
convertObjCollToArrColl(json);
