js:

var data = [
 {id: 10, name: 'user-10'},
 {id: 15, name: 'w-user-15'},
 {id: 20, name: 'user-20'},
];

var output = R.pipe(
  R.map(el => {
    return {
      ...el,
      'name_up': el.name.toUpperCase()
    };
  }),
)(data);

alert( JSON.stringify(output) );

Result: