小编use*_*120的帖子

我的初始状态如下所示，如果添加了新书或更改了价格，则新的更新数组来自服务，我的结果需要在初始状态下合并。

const initialState = {
  booksData: [
    {"Code":"BK01","price":"5"},
    {"code":"BK02","price":"30"},
    {"code":"BK03","price":"332"},
    {"code":"BK04","price":"123"}
  ] 
};

来自服务器的更新的阵列，几乎没有记录更新/新

data: [
  {"Code":"BK01","price":"10"},
  {"code":"BK02","price":"25"},       
  {"code":"BK05","price":"100"}
] 

将更新后的数组与旧数组合并后，更新后的状态应变为。

booksData: [
  {"Code":"BK01","price":"10"},
  {"code":"BK02","price":"25"},
  {"code":"BK03","price":"332"},
  {"code":"BK04","price":"123"},
  {"code":"BK05","price":"100"}
] 

我有两个csv文件old.csv和new.csv。我只需要new.csv文件中的新记录或更新记录。如果old.csv中存在记录，则从new.csv中删除记录。

old.csv

"R","abc","london","1234567"
"S","def","london","1234567"
"T","kevin","boston","9876"
"U","krish","canada","1234567"

new.csv

"R","abc","london","5678"
"S","def","london","1234567"
"T","kevin","boston","9876"
"V","Bell","tokyo","2222"

在new.csv中输出

"R","abc","london","5678"     
"V","Bell","tokyo","2222"

注意：如果new.csv中的所有记录都相同，则new.csv应该为空