認識基礎 LINQ
LINQ,全名 Language Integrated Query,表示和語言整合,具有查詢能力的技術。
LINQ,全名 Language Integrated Query,表示和語言整合,具有查詢能力的技術。
在學 LINQ 之前,我想先認識一下 ADO.NET
,這兩個同樣都是 .NET Framework 很重要的技術。
本身英文基礎:2018 年 6 月,雅思平均 6.5 (L6/R8/W6/S6)。
時隔三年,因為希望可以拿到四個 8,獲得澳洲移民分數 20 分的加分,再加上英文能力不是頂尖,總覺得口說、聽力雅思無法拿到 8 (實力很重要外,也太看考官),於是在聽到好多人拼 PTE 拿到想要的分數後,決定轉戰 PTE。(如果還不清楚 PTE 是什麼英文考試,請看PTE新手入门课系列)
SQL stands for Structured Query Language, as it is the special purpose domain-specific language for querying data in Relational Database Management System (RDBMS).
Microsoft SQL Server, MySQL, Oracle, etc. use SQL for querying with slight syntax differences.
To understand OUTER APPLY in MS SQL Server with extensive list of examples, I create two simple tables with sample data as the followings. The script of creating the tables is here.
To understand CROSS APPLY in MS SQL Server with extensive list of examples, I create two simple tables with sample data as the followings. The script of creating the tables is here.
Create demo tables.
The following notes are pain points that I encountered when I was doing my job. Listed all of them to remember them and also hope I can help someone who also comes across this issue.
本篇是參考 ReactJS Tutorial 的重點摘錄學習筆記。內容著重於 React 16.8 以前沒有 Hooks 時,以 Class Component 為主的教學。
閱讀前具備知識:
JavaScript 的兩大型別:原始型別 (Primitive type) 及參考型別 (Reference type) 中,參考型別就是 Object 型別。Object {}
、Array []
、Function ()
都是物件型別。
先來認識我們一般認知上由 {}
組成的物件。