This but now: https://medium.com/@fagnerbrack/promises-are-not-proxies-fd00751eb980#.l7lmdrqey

IdealWorldToday.js

var matches = righto(getSoccerMatches); // <- Ye Olde error-back
var results = righto(getSoccerResults); // <- Ye Olde error-back

var detailedMatches = righto.sync(function(matches, results){
    return matches.map(function( match ) {
        return {
            name: match.name,
            score: findScoreForMatch(match, results)
        };
    });
}, matches, results);

detailedMatches(function(error, result){ // <- Exposes a Ye Olde error-back consuming function
    if(error){
        return console.error( 'Failed to print the score', error );
    }

    details.forEach(function( detailedMatch ) {
        const name = detailedMatch.name;
        const score = detailedMatch.score;
        console.log( `${name} with the score ${score}` );
    });
});