I have an array with names
const players = ['name1','name2','name3','name4','name5','name6','name7','name8'];
const teams = players.length / 2; // -> 4 teams
I want to make teams of 2 people (randomly chosen) and make new arrays from the results -> team
function createTeams() {
for (let i = 0; i < teams; i ) {
for (let x = 0; x < 2; x ) {
// get a random player
selectedPlayer = players[Math.floor(Math.random() * players.length)];
console.log('Selected Player will be added to a team: ', selectedPlayer);
// delete this player from the array
while (players.indexOf(selectedPlayer) !== -1) {
players.splice(players.indexOf(selectedPlayer), 1);
}
// add this player to a new array
//?????
}
}
}
Anyone knows how to do this?
CodePudding user response：
You can define a new Array which will contains the teams where you push the two players.
Note that it's better to pass the players array as a parameters of the function and make a swallow copy of it so it won't modify the player array.
const players = ['name1','name2','name3','name4','name5','name6','name7','name8'];
function createTeams(players) {
const playersLeft = [...players]
const newTeams = []
const nbTeams = players.length / 2
for (let i=0; i<nbTeams; i ){
const player1 = playersLeft.splice(Math.floor(Math.random()*playersLeft.length),1)[0]
const player2 = playersLeft.splice(Math.floor(Math.random()*playersLeft.length),1)[0]
newTeams.push([player1, player2])
}
return newTeams
}
console.log(createTeams(players))Edit : Improve version using a nbPlayerPerTeam parameter
const players = ['name1', 'name2', 'name3', 'name4', 'name5', 'name6', 'name7', 'name8'];
function createTeams(players, nbPlayerPerTeam) {
const playersLeft = [...players]
const newTeams = []
const nbTeams = players.length / nbPlayerPerTeam
for (let i = 0; i < nbTeams; i ) {
const players = []
for (let j = 0; j < nbPlayerPerTeam; j ) {
const player = playersLeft.splice(Math.floor(Math.random() * playersLeft.length), 1)[0]
players.push(player)
}
newTeams.push(players)
}
return newTeams
}
console.log(createTeams(players, 3))CodePudding user response：
function pickTeams(array, teamSize) {
// Shuffle array, make a copy to not alter original our original array
const shuffled = [...array].sort( () => 0.5 - Math.random());
const teams = [];
// Create teams according to a team size
for (let i = 0; i < shuffled.length; i = teamSize) {
const chunk = shuffled.slice(i, i teamSize);
teams.push(chunk);
}
return teams;
}
const players = ['name1','name2','name3','name4','name5','name6','name7','name8'];
const teams = pickTeams(players, 2);
CodePudding user response：
const players = ['name1', 'name2', 'name3', 'name4', 'name5', 'name6', 'name7', 'name8'];
// Divide data by length
const divide = (arr, n) => arr.reduce((r, e, i) =>
(i % n ? r[r.length - 1].push(e) : r.push([e])) && r, []);
const shuffle = (arr) => {
// Deep copy an array using structuredClone
const array = structuredClone(arr);
let currentIndex = array.length, randomIndex;
// While there remain elements to shuffle
while (currentIndex != 0) {
// Pick a remaining element
randomIndex = Math.floor(Math.random() * currentIndex);
currentIndex--;
// And swap it with the current element
[array[currentIndex], array[randomIndex]] = [
array[randomIndex], array[currentIndex]
];
}
return array;
}
// Shuffle players
const shuffled = shuffle(players);
// Set a number of people in a team
const groups = divide(shuffled, players.length / 2);
groups.forEach((team, i) => console.log(`team ${i 1}`, JSON.stringify(team)));CodePudding user response：
Check this updated code, I hope it will work for you. Just create two dimensional array and push players.
const players = ['name1','name2','name3','name4','name5','name6','name7','name8'];
let multi_team=new Array; // new array for team of random 2 players
const teams = players.length / 2; // -> 4 teams
console.log(teams);
createTeams();
function createTeams() {
for (let i = 0; i < teams; i ) {
multi_team[i]= new Array;
for (let x = 0; x < 2; x ) {
// get a random player
selectedPlayer = players[Math.floor(Math.random() * players.length)];
multi_team[i][x]=selectedPlayer;
// delete this player from the array
while (players.indexOf(selectedPlayer) !== -1) {
players.splice(players.indexOf(selectedPlayer), 1);
}
}
}
console.log(multi_team);
}
CodePudding user response：
To differ from previous answers, this is a dynamic way to do it, so you don't care if there are 5 teams or 2, 10 players or 500.
const players = ['j1', 'j2', 'j3', 'j4', 'j5', 'j6', 'j7', 'j8'];
const organizeTeams = (numberOfTeams, players) => {
var teams = [];
// Clone the array to avoid mutations
const freePlayers = [...players];
// How many players will play per team
const playersPerTeam = Math.floor(players.length / numberOfTeams);
// How many player won't have team
const unorganizablePlayers = freePlayers.length % numberOfTeams;
for (let t = 1; t <= numberOfTeams; t ) {
teams = [...teams, pickRandomPlayers(freePlayers, playersPerTeam)];
}
return { teams, playersPerTeam, unorganizablePlayers };
};
const pickRandomPlayers = (players, playersPerTeam) => {
let pickedPlayers = [];
for (let c = 1; c <= playersPerTeam; c ) {
const index = Math.floor(Math.random() * (players.length - 1));
const player = players[index];
pickedPlayers = [...pickedPlayers, player];
// When we pick the player we remove it from the array to avoid duplicates.
players.splice(index, 1);
}
return pickedPlayers;
};
const championship = organizeTeams(3, players);
console.log(`We have ${championship.teams.length} teams.`);
championship.teams.forEach((team, index) => {
console.log(`Team ${index 1} players: ${team.join(',')}`);
});
console.log(
`There was no place to assign ${championship.unorganizablePlayers} players`
);CodePudding user response：
const players = [ 'name1', 'name2', 'name3', 'name4', 'name5', 'name6', 'name7', 'name8' ]
const shuffled = players.sort((a, b) => 0.5 - Math.random())
const result = Array.from({ length: shuffled.length / 2 }, (_, i) => shuffled.slice(i * 2, i * 2 2));
console.log(result)