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