Javascript – map through array but only return value if there is no error

Basically I have an array of games that I am mapping through. Sometimes the games are missing data, which causes errors in my code. I need to ignore these games and not return them to the mapped array. I tried using a try catch block as seen before – which does prevent the code from erroring out, but it returns ‘undefined’ to the mapped array.

How can I achieve my desire of excluding these games?

// function to test record bet and result for each game
const checkBets = (gamelogs, bet) => {
    let checked = gamelogs.map(game =>{
        let tmp = {};
        try{
            switch(bet){
                // handle money line bets
                case('home.ml'):
                    tmp.bet = game.home.team+" ML";
                    tmp.odds = game.home.ml.open;
                    if(game.home.score > game.away.score){
                        tmp.result = "W";
                    }else if(game.home.score < game.away.score){
                        tmp.result = "L";
                    }else tmp.result = "P";
                    break;
                case('away.ml'):
                    tmp.bet = game.away.team+" ML";
                    tmp.odds = game.away.ml.open;
                    if(game.away.score > game.home.score){
                        tmp.result = "W";
                    }else if(game.away.score < game.home.score){
                        tmp.result = "L";
                    }else tmp.result = "P";
                    break;
                // handle runline bets
                case('home.runline'):
                    tmp.bet = game.home.team + " " + game.home.runline.runs;
                    tmp.odds = game.home.runline.odds;
                    if(game.home.score + game.home.runline.runs > game.away.score){
                        tmp.result = "W";
                    }else if(game.home.score + game.home.runline.runs < game.away.score){
                        tmp.result = "L";
                    }else tmp.result ="P";
                    break;
                case('away.runline'):
                    tmp.bet = game.away.team + " " + game.away.runline.runs;
                    tmp.odds = game.away.runline.odds;
                    if(game.away.score + game.away.runline.runs > game.home.score){
                        tmp.result = "W";
                    }else if(game.away.score + game.away.runline.runs < game.home.score){
                        tmp.result = "L";
                    }else tmp.result ="P";
                    break;
                // handle total bets
                case('over'):
                    tmp.bet = "O " + game.totals.open.runs;
                    tmp.odds = game.totals.open.odds;
                    if(game.home.score + game.away.score > game.totals.open.runs){
                        tmp.result = "W";
                    }else if(game.home.score + game.away.score < game.totals.open.runs){
                        tmp.result = "L";
                    }else tmp.result ="P";
                    break;
                case('under'):
                    tmp.bet = "U " + game.totals.open.runs;
                    tmp.odds = game.totals.open.odds;
                    if(game.home.score + game.away.score < game.totals.open.runs){
                        tmp.result = "W";
                    }else if(game.home.score + game.away.score > game.totals.open.runs){
                        tmp.result = "L";
                    }else tmp.result ="P";
                    break;
                default:
                    break;
            };
            // return game
            return {...game, bet:tmp};
        }catch(err){
            console.log(err);
            return;
        };
    });
    return checked;
};

>Solution :

return checked.filter(Boolean);

This will make sure that there is no undefined in your array. Without the contents of the gamelogs, this is all I could figure out right now.

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