我想從classes數組中檢索所有對象，其中coachId === 2使用filter或任何ES6函數。使用Javascript Array過濾器獲取數組中所有匹配的類
示例輸入：
let arr =
[
{
name: "boo",
schedule: {
classes: [ {coachId: 1}, {coachId: 2}, {coachId: 3}]
}
},
{
name: "foo",
schedule: {
classes : [ {coachId: 1}, {coachId: 2}, {coachId: 4}]
}
}
]
預期輸出：
[
[ {coachId: 2}],
[ {coachId: 2}]
]
var arr =
[
{
name: "boo",
schedule: {
\t classes: [ {coachId: 1}, {coachId: 2}, {coachId: 3}]
}
},
{
name: "foo",
schedule: {
\t classes : [ {coachId: 1}, {coachId: 2}, {coachId: 4}]
}
}
];
var employeeId = 2;
var finalArr = arr.map(item => {
\t item.schedule.classes = item.schedule.classes.map(cls => {
cls.coachId = employeeId;
return cls;
});
return item;
});
console.log(finalArr);編輯：
var employeeId = 2;
var finalArr = [];
arr.forEach(item => {
var classes = item.schedule.classes.map(cls => {
cls.coachId = employeeId;
return cls;
});
finalArr = finalArr.concat(classes);
});
console.log(finalArr);
這是你在找什麼？
const arr =
[
{
name: "boo",
schedule: {
classes: [ {coachId: 1}, {coachId: 2}, {coachId: 3}]
}
},
{
name: "bar",
schedule: {
classes : [ {coachId: 1}, {coachId: 4}]
}
},
{
name: "foo",
schedule: {
classes : [ {coachId: 1}, {coachId: 2}, {coachId: 4}]
}
}
]
console.log(arr.reduce((result, item) => {
result = [...result, ...item.schedule.classes.filter(classItem => classItem.coachId === 2)];
return result;
}, []));我只想要匹配的對象具有coachId是2從類數組中。你的代碼是錯誤的。 – srinivas
他的代碼是錯誤的，因爲沒有辦法告訴使用_exactly_所需的輸出結構。我們所有的是'我想要一些類'。 –
現在看到OP的上面的評論：我想輸出像'[[{coachId：2}]，[{coachId：2}]]' –
好吧，我們現在有一些代碼。但預期的產出是多少？ 「我想要所有課程」是什麼意思？你想要一個類的數組嗎？所有類連接？ –
我想要一些班級@Jeremy Thille – srinivas
所以你想要'[[{coachId：1}，{coachId：2}，{coachId：3}]，[{coachId：1}，{coachId：2}，{coachId ：3}]]？一組數組？這是所需的輸出？ '我想要一些類'仍然不清楚。 _Explicitely_寫出所需的輸出結構。 –