Question

我是新手，学习JS和JSON。好吧，我有JSON数据：

   {
      "month":"november",
      "category":"coffee",
      "price":50,
      "name":"Pike Place Roast Brewed Coffee Verismo Pods",
      "flavor":"flavored",
      "count":5,
      "roast":"medium",
      "type":"regular"
   },
   {
      "month":"august",
      "category":"coffee",
      "price":40,
      "name":"Starbucks VIA Ready Brew French Roast",
      "flavor":"flavored",
      "count":548,
      "roast":"blonde",
      "type":"decaffinated"
   },
   {
      "month":"november",
      "category":"coffee",
      "price":50,
      "name":"Starbucks Caffé Verona Blend, Whole Bean",
      "flavor":"flavored",
      "count":5,
      "roast":"medium",
      "type":"regular"
   },
   {
      "month":"asia-pacific",
      "category":"coffee",
      "price":20,
      "name":"Starbucks Caffè Verona K-Cup Pods",
      "flavor":"flavored",
      "count":3,
      "roast":"dark",
      "type":"regular"
   },
   {
      "month":"august",
      "category":"coffee",
      "price":40,
      "name":"Milk Verismo Pods",
      "flavor":"flavored",
      "count":233,
      "roast":"blonde",
      "type":"decaffinated"
   },
   {
      "month":"november",
      "category":"coffee",
      "price":50,
      "name":"Starbucks VIA Ready Brew Decaf Italian Roast",
      "flavor":"flavored",
      "count":5,
      "roast":"medium",
      "type":"regular"
   },
   {
      "month":"august",
      "category":"coffee",
      "price":40,
      "name":"Guatemala Antigua Espresso Verismo Pods",
      "flavor":"flavored",
      "count":587,
      "roast":"blonde",
      "type":"decaffinated"
   }

现在假设我想获得与月份相关的所有数据（例如11月），我怎样才能在Javascript中实现这一点？任何帮助将不胜感激。感谢。

Answer 1

那不是JSON，但我认为它是一个部分阵列。

select t.*
from t join
     (select category, min(t2.date) as mindate
      from t2
      where t2.status = 1
     ) t2
     on t2.category = t.category and t.date > t2.mindate;

它是如何运作的？

过滤数组中每个项目的循环（var result = theArray.filter(function(value){ return value.month === "November"; // or whatever you filter on }); // result is now a filter array containing only month === 'November'）。如果返回true，则将其添加到新数组中。 value忽略它（过滤掉）

如何通过特定字段过滤出JSON数据？

1 个答案: