Question

从中提取数据并重新格式化。

Promise = require "bluebird"
request = Promise.promisify require "request"
moment = require "moment"
cdn = require('config').server.cloudFrontDomain
toTitleCase = require "titlecase"

exports.getStocks = (path) ->
  return new Promise (resolve, reject) ->
    request path
      .then (body) ->
        germanStock = []
        germanStocks = JSON.parse body.body
        germanStocks.forEach (stock) ->
          obj = {}
          this.parsePart = (remaining) ->
            value = remaining.value
            dashIndex = value.lastIndexOf '-'
            if dashIndex != -1
              remaining.value = value.substring 0, dashIndex - 1
              return value.substring(dashIndex + 1).trim()
            else 
              return ''

          remaining = 
            value: stock.name
          size = parsePart remaining
          colour = parsePart remaining
          name = remaining.value
          sku = stock.sku
          styleId = sku.split(/-/)[0]
          colorcode = /^(.*)-(.*)([0-9])$/.exec(sku)?[2]
          bgStyle = "url(//#{cdn}/assets/product_shots/thumbs/#{styleId}-#{colorcode}.jpg)"

          obj.id = sku
          obj.name = name
          obj.colorUrl = bgStyle
          obj.colour = toTitleCase(colour.toLowerCase())
          obj.size = size
          obj.stock = stock.stock
          obj.inProduction = ''
          obj.office = 'DE'

          stock.preorders.forEach (i, idx) ->
            date = moment(i.date).format('DD-MM-YYYY')
            if idx != stock.preorders.length - 1
              obj.inProduction = obj.inProduction.concat i.amount + ' due on ' + date + ', '
            else
              obj.inProduction = obj.inProduction.concat i.amount + ' due on ' + date
          germanStock.push obj
        resolve germanStock

      .catch (err) -> 
        reject err

我的数据如下：

{  
   "id":1,
   "stamp":"2014-09-25T12:55:30Z",
   "name":" MENS T-SHIRT - BRIGHT BLUE - XS",
   "sku":"SS01-BB0",
   "stock":81,
   "active":true,
   "preorders":[  
      {  
         "id":92549,
         "amount":160,
         "date":"2016-06-19T22:00:00Z"
      },
      {  
         "id":92549,
         "amount":200,
         "date":"2016-06-19T22:00:00Z"
      },
      {  
         "id":92549,
         "amount":1000,
         "date":"2016-06-21T22:00:00Z"
      }
   ],
   "discountMatrix":0.0,
   "stockNormalized":81,
   "preOrdersSum":1360
},
{  
   "id":2,
   "stamp":"2014-09-25T12:55:30Z",
   "name":" MENS T-SHIRT - BRIGHT BLUE - S",
   "sku":"SS01-BB1",
   "stock":339,
   "active":true,
   "preorders":[  
      {  
         "id":92551,
         "amount":240,
         "date":"2016-06-19T22:00:00Z"
      },
      {  
         "id":92438,
         "amount":160,
         "date":"22016-06-19T22:00:00Z"
      }
   ],
   "discountMatrix":0.0,
   "stockNormalized":339,
   "preOrdersSum":400
},

对同一日期的每个preorders数量进行分组的正确方法是什么，这样才能获得：

160 due on 19-06-2016, 200 due on 19-06-2016, 1000 due on 21-06-2016

我得到360 due on 19-06-2016, 1000 due on 21-06-2016

任何建议都非常感激。

Answer 1

您可以使用以日期为键的对象和日期的总金额作为值。

对于每个预订单，在此对象的日期索引处添加金额。在迭代结束时打印对象的内容：

moment = require "moment"

data = [
  {
    id:1
    stamp: "2014-09-25T12:55:30Z"
    name: " MENS T-SHIRT - BRIGHT BLUE - XS"
    sku: "SS01-BB0"
    stock:81
    active:true
    preorders:[
      {
         id:92549
         amount:160
         date: "2016-06-19T22:00:00Z"
      }
      {
         id:92549
         amount:200
         date: "2016-06-19T22:00:00Z"
      }
      {
         id:92549
         amount:1000
         date: "2016-06-21T22:00:00Z"
      }
    ]
    discountMatrix:0.0
    stockNormalized:81
    preOrdersSum:1360
  }
]

obj = {}
obj.inProduction = ""
amountByDate = {}

# for each document in your data
for doc in data
  # for each preorder in your document
  for preorder in doc.preorders
    # add it's amount in the index equals to it's date
    if amountByDate[preorder.date]
      amountByDate[preorder.date] += preorder.amount
    else
      # or create the index with the value if it doesn't exist
      amountByDate[preorder.date] = preorder.amount

for date, amount of amountByDate
  if obj.inProduction != ""
    obj.inProduction = obj.inProduction.concat ", #{amount} due on #{moment(date).format('DD-MM-YYYY')}"
  else
    obj.inProduction = obj.inProduction.concat "#{amount} due on #{moment(date).format('DD-MM-YYYY')}"

console.log obj.inProduction

结果：

360 2016年6月20日到期，1000年到期于2016年6月22日

按日期在coffeescript中的每个组

1 个答案: