I have the following expression:
export const alpha: [
{ 'A': ['11','12','13'] },
{ 'B': ['21','22','23'] },
{ 'C': ['31','32','33'] }
];
I need to create a new array that has the leading keys: 'A', 'B' and 'C'
I'm trying to do this, but there is no key property:
const arr = [];
alpha.forEach(function(item) {
arr.push(item.key);
});
How to do it?
One approach would be to use Object.keys():
const alpha = [
{ 'A': ['11','12','13'] },
{ 'B': ['21','22','23'] },
{ 'C': ['31','32','33'] }
];
const arr = [];
alpha.forEach(function(item) {
arr.push(Object.keys(item)[0]);
});
console.log(arr);I would build it up deconstructing the array like so:
let newArray6 = {'A':[ ...alpha[0].A],'B':[ ...alpha[1].B],'C':[ ...alpha[2].C]}
This could then be easily turned into a programmatic loop :)
The output would be as follows:
A: (3) ["11", "12", "13"]
B: (3) ["21", "22", "23"]
C: (3) ["31", "32", "33"]
