const data = [
{
locations: [
{
locationId: 0,
players: [
{
holes: [
{
holeId: 101,
score: 5
},
{
holeId: 102,
score: 5
},
{
holeId: 103,
score: 5
},
{
holeId: 104,
score: 5
}
],
firstName: "firstName 1",
lastName: "lastName 1"
},
{
holes: [
{
holeId: 101,
score: 5
},
{
holeId: 102,
score: 5
}
],
firstName: "firstName 2",
lastName: "lastName 2"
},
{
holes: [
{
holeId: 101,
score: 5
}
],
firstName: "firstName 3",
lastName: "lastName 3"
}
]
}
]
}
]
const players = data[0].locations[0].players;
players.forEach((item) => {
console.log(item.holes);
// [{...}, {...}, {...}, {...}]
// 0: {holeId: 101, score: 5]
// 1: {holeId: 102, score: 5]
// 2: {holeId: 103, score: 5]
// 3: {holeId: 104, score: 5]
// [{...}, {...}]
// 0: {holeId: 101, score: 5]
// 1: {holeId: 102, score: 5]
// [{...}]
// 0: {holeId: 101, score: 5]
});[
{
id: 101,
value: 1
},
{
id: 102,
value: 2
},
{
id: 103,
value: 3
},
{
id: 104,
value: 4
}
]
const players = data[0].locations[0].players;
const holes = new Array();
for (player of players){
holes.filter(f=>f.id === player.holeId).length === 0 ? holes.push({id: player.holeId, value: player.score}) : holes.filter(f=>f.id === player.holeId)[0].value+= player.score;
}