将分组的 strftime 时间转换为整数

Convert grouped strftime time to integer

我有这段代码(我将把它作为 JSON 数据传递给 highchart JS)

<%= ItemSale.pluck(:item_id).uniq.map{|item_id| {
name: Item.find(item_id).name, 
data: @item_sales.where(item_id: item_id).group_by_day(:date_sold,
format: "%s").count.to_a}}.to_json %>

那个returns:

[{"name":"Computer","data":[["1456790400",2],["1456876800",0],["1456963200",1]]},{"name":"Android Phones","data":[["1456876800",3],["1456963200",0],["1457049600",1],["1457136000",0],["1457222400",0],["1457308800",2]]}]

但是,我需要这个:

["1457049600",1]

成为一个整数并像这样乘以 1000:

[1457049600000,1]

我试着做样本数据以确保它是正确的并且可以正常工作:

@item_sales_series = [{"name":"Computer","data":[[1456790400000,2],[1456876800000,0],[1456963200000,1]]},{"name":"Android Phones","data":[[1456876800000,3],[1456963200000,0],[1457049600000,1],[1457136000000,0],[1457222400000,0],[1457308800000,2]]}].to_json

有没有可能或者有办法

group_by_day(:date_sold, format: "%s").count.to_a

要输出整数而不是字符串并将其乘以 1000?

我使用分组日期 gem 按日期对我的数据进行分组。此外,我没有为这个项目使用 Highchart gems,我正在尝试将数据插入图表的不同方法。

>> array = [{"name":"Computer","data":[["1456790400",2],["1456876800",0],["1456963200",1]]},{"name":"Android Phones","data":[["1456876800",3],["1456963200",0],["1457049600",1],["1457136000",0],["1457222400",0],["1457308800",2]]}]

>> array.map{|hash| hash.merge(data: hash[:data].map{|str, int| [str.to_i*1000, int]})}
=> [{:name=>"Computer", :data=>[[1456790400000, 2], [1456876800000, 0], [1456963200000, 1]]}, {:name=>"Android Phones", :data=>[[1456876800000, 3], [1456963200000, 0], [1457049600000, 1], [1457136000000, 0], [1457222400000, 0], [1457308800000, 2]]}]

其工作原理如下:

#        ,-- Loop over every element of the top-level array and change it's value
#        |                 ,-- For each hash, change only the element called "data"
#        |                 |                      ,-- In the "data" array, change every element
#        |                 |                      |                   ,-- Change the string to an integer and multiply by 1000
#        |                 |                      |                   |
#        v                 v                      v                   v
>> array.map{|hash| hash.merge(data: hash[:data].map{|str, int| [str.to_i*1000, int]})}