Javascript 根据对象属性过滤数组
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Filter an array based on an object property
提问by Miguel Moura
I have an array of objects, something as follows:
我有一个对象数组，如下所示：
var events = [
{ date: "18-02-2016", name: "event A" },
{ date: "22-02-2016", name: "event B" },
{ date: "19-02-2016", name: "event C" },
{ date: "22-02-2016", name: "event D" }
];
And I have a date, for example "22-02-2016". How can I get an array with all object which date is the same as the given date? So in this example I would get events B and D.
我有一个日期，例如“22-02-2016”。如何获取包含所有对象的数组，其日期与给定日期相同？所以在这个例子中，我会得到事件 B 和 D。
回答by newfurniturey
You could use array's filter()function:
您可以使用数组的filter()功能：
function filter_dates(event) {
return event.date == "22-02-2016";
}
var filtered = events.filter(filter_dates);
The filter_dates()method can be standalone as in this example to be reused, or it could be inlined as an anonymous method - totally your choice =]
该filter_dates()方法可以像本示例中那样独立进行重用，也可以作为匿名方法内联 - 完全由您选择 =]
A quick / easy alternative is just a straightforward loop:
一个快速/简单的替代方案只是一个简单的循环：
var filtered = [];
for (var i = 0; i < events.length; i++) {
if (events[i].date == "22-02-2016") {
filtered.push(events[i]);
}
}
回答by leo.fcx
User Array.prototype.filter()as follows:.
var filteredEvents = events.filter(function(event){
return event.date == '22-02-2016';
});
