Looping through an array of objects.. how can I filter out duplicate names and return players in a new array?
const playerNames = [
{ winner: 'Sam', loser: 'Bruce', loser_points: 10 },
{ winner: 'Sam', loser: 'Hakim', loser_points: 9 }
];
var getPlayers = function(games) {
var players = {};
var game;
for (var i=0; i<games.length; i++) {
game = games[i];
players[game.winner] = 1;
players[game.loser] = 1;
}
return Object.keys(players);
}
console.log(getPlayers(playerNames));
There are multiple ways to achieve this (please see other solutions posted). Below is a modified version of your code. Some minor corrections added in your if condition.
const playerNames = [{
winner: 'Sam',
loser: 'Bruce',
loser_points: 10
},
{
winner: 'Sam',
loser: 'Hakim',
loser_points: 9
},
{
winner: 'Sam',
loser: 'Paul',
loser_points: 9
}
];
const players = function(outcomes) {
const arr = [];
for (let i = 0; i < outcomes.length; i++) {
// check and push winner
if (!arr.includes(outcomes[i].winner))
arr.push(outcomes[i].winner);
// check and push loser
if (!arr.includes(outcomes[i].loser))
arr.push(outcomes[i].loser);
}
return arr;
};
console.log(players(playerNames));Use Set to generate unique list of data.
const playerNames = [{ winner: 'Sam', loser: 'Bruce', loser_points: 10 },{ winner: 'Sam', loser: 'Hakim', loser_points: 9 }];
const players = Array.from(new Set(playerNames.flatMap((node) => [node.winner, node.loser])));
console.log(players);