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[英]How to set an object using amp-selector from top-level array to use in amp-bind
[英]Retrieve a flattened array of values taken from an object array that exists within a top-level object of which I am given an array
請隨時修改標題,這對我來說很難解釋和搜索。
var booking = [
{
x: "1",
y: "2",
days: [
{
hours: 8
},
]
},
{...}
]
var hoursBooked = [8, 2, 4, 8, 2, 8, 3, 4]; // this is what I want
因此,我有一個“預訂”對象數組。 每個“預訂”可以在“天”對象的數組中有很多天。 在“天”對象中包含“小時”屬性。
我要做的-遍歷bookings數組並輸出一個“ Hours”值的扁平數組(這樣我就可以在圖中可視化)。
我確信有一種不錯的功能或其他方法可以做到這一點,而不是使用一系列的“ for”循環。
任何人?
var booking = [
{
x: "1",
y: "2",
days: [
{
hours: 8
},
]
},
{
x: "1",
y: "2",
days: [
{
hours: 3
},
{
hours: 5
}
]
}
];
_(booking).map('days').flatten().map('hours').value();
將打印
[8, 3, 5]
您可以使用days
數組的值來減少booking
。
var booking = [{ x: "1", y: "2", days: [{ hours: 8 }, { hours: 4 }, ] }, { x: "3", y: "4", days: [{ hours: 1 }, { hours: 3 }, ] }, { x: "3", y: "4", days: [] }], hoursBooked = booking.reduce((r, a) => r.concat((a.days || []).map(d => d.hours)), []); console.log(hoursBooked);
var booking = [ { x: "1", y: "2", days: [ { hours: 8 }, { hours: 2 } ] }, { x: "1", y: "2", days: [ { hours: 4 }, ] } ] var hoursBooked = [] booking.forEach(b=>b.days.forEach(d=>hoursBooked.push(d.hours))) console.log(hoursBooked)
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