How can I extract the headers of objects in an array in TypeScript?
let data = [{name: "A", skills: 50, result: 80},
{name: "B", skills: 40, result: 90},
{name: "C", skills: 60, result: 60}];
let headers = Object.keys(data[0]);
console.log(headers);
// headers = ["name", "skills", "result"]
To access the keys from the first object in the array, you can use the following code snippet.
let scores = [{ name: "A", skills: 50, result: 80 }, { name: "B", skills: 40, result: 90 }, { name: "C", skills: 60, result: 60 }],
parameters = Object.keys(scores[0]);
console.log(parameters);To handle objects with varying keys, you can leverage the power of .reduce() and subsequently extract the Object.values() from your aggregated object:
const items = [{name: "A", skills: 50, result: 80}, {name: "B", skills: 40, result: 90}, {x: "C", y: 60, z: 60}];
const output = Object.values(items.reduce((accumulator, item) => {
const key = Object.keys(item);
accumulator[key] = accumulator[key] || key;
return accumulator;
}, {}));
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