我有一个JSON格式数据集
[
{"period":"daily", "date":"2015-04-01", "Sales_Total_Activity":0, "Sales_Emails":0},
{"period":"daily", "date":"2015-04-02", "Sales_Total_Activity":5, "Sales_Emails":4},
{"period":"weekly", "date":"2015-04-03", "Sales_Total_Activity":8, "Sales_Emails":9},
{"period":"weekly", "date":"2015-04-04", "Sales_Total_Activity":2, "Sales_Emails":6}
]
并且希望能够对其进行过滤,以便我只提取与"每周"相关联的数据。条目。做这个的最好方式是什么。我试过看过d3.nest的实施,但没有取得多大进展。我必须写一个特殊的功能吗?
由于
答案 0 :(得分:4)
只需应用一些Array.prototype.filter
:
filter()
方法创建一个新数组,其中包含通过所提供函数实现的测试的所有元素。
var array = [
{ "period": "daily", "date": "2015-04-01", "Sales_Total_Activity": 0, "Sales_Emails": 0 },
{ "period": "daily", "date": "2015-04-02", "Sales_Total_Activity": 5, "Sales_Emails": 4 },
{ "period": "weekly", "date": "2015-04-03", "Sales_Total_Activity": 8, "Sales_Emails": 9 },
{ "period": "weekly", "date": "2015-04-04", "Sales_Total_Activity": 2, "Sales_Emails": 6 }
],
filtered = array.filter(function (a) { return a.period === 'weekly'; });
document.write('<pre>' + JSON.stringify(filtered, 0, 4) + '</pre>');