const array_obj = [
{ name: 'Matrix', age: 58, language: "node.js" },
{ name: 'R2D2', age: 90, language: "java" },
{ name: 'Machina', age: 49, language: "python" }
];
array_obj.forEach(object => {
delete object.age;
});
console.log(array_obj);
/*
run:
[
{ name: 'Matrix', language: 'node.js' },
{ name: 'R2D2', language: 'java' },
{ name: 'Machina', language: 'python' }
]
*/