js:
var data = [
{fname: 'Roy', lname: 'Red'},
{fname: 'Gary', lname: 'Green'},
{fname: 'Bob', lname: 'Blue'},
{fname: 'Roy', lname: 'Red'},
];
var dataUpd = R.pipe(
R.uniq,
//R.uniqBy(R.props(['fname', 'lname'])),
//R.uniqBy(R.identity),
)(data);
alert( JSON.stringify(dataUpd) );
Result: