ChuckLu - 博客园

2020年6月5日

Why Would I Ever Need to Use C# Nested Classes

摘要： Why Would I Ever Need to Use C# Nested Classes [duplicate] A pattern that I particularly like is to combine nested classes with the factory pattern: p 阅读全文

posted @ 2020-06-05 10:49 ChuckLu 阅读(178) 评论(0) 推荐(0)

RabbitMQ compare with redis and MSMQ

摘要： Redis Vs RabbitMQ as a data broker/messaging system in between Logstash and elasticsearch 回答1 After evaluating both Redis and RabbitMQ I chose RabbitM 阅读全文

posted @ 2020-06-05 10:29 ChuckLu 阅读(293) 评论(0) 推荐(0)

2020年6月2日

Utility classes should not have public constructors

摘要： Utility classes should not have public constructors Utility classes, which are collections of static members, are not meant to be instantiated. C# add 阅读全文

posted @ 2020-06-02 18:50 ChuckLu 阅读(2508) 评论(0) 推荐(0)

Why are C# 4 optional parameters defined on interface not enforced on implementing class?

摘要： Why are C# 4 optional parameters defined on interface not enforced on implementing class? UPDATE: This question was the subject of my blog on May 12th 阅读全文

posted @ 2020-06-02 16:40 ChuckLu 阅读(137) 评论(0) 推荐(0)

Method overrides should not change parameter defaults

摘要： Method overrides should not change parameter defaults using System; namespace ConsoleApp1 { public class Base { public virtual void Write(int i = 42) 阅读全文

posted @ 2020-06-02 16:10 ChuckLu 阅读(217) 评论(0) 推荐(0)

Why use a public method in an internal class?

摘要： Why use a public method in an internal class? UPDATE: This question was the subject of my blog in September 2014. Thanks for the great question! There 阅读全文

posted @ 2020-06-02 15:40 ChuckLu 阅读(223) 评论(0) 推荐(0)

Git Submodules vs Git Subtrees

摘要： Git Submodules vs Git Subtrees Subtrees vs Submodules The simplest way to think of subtrees and submodules is that a subtree is a copy of a repository 阅读全文

posted @ 2020-06-02 13:53 ChuckLu 阅读(452) 评论(0) 推荐(0)

2020年5月28日

To Allow App through Windows Defender Firewall in Command Prompt

摘要： Add or Remove Allowed Apps through Windows Firewall in Windows 10 Starting with Windows 10 build 16193, Windows Firewall has been renamed to Windows D 阅读全文

posted @ 2020-05-28 13:23 ChuckLu 阅读(479) 评论(0) 推荐(0)

2020年5月27日

Subquery using Exists 1 or Exists *

摘要： Subquery using Exists 1 or Exists * 回答1 No, SQL Server is smart and knows it is being used for an EXISTS, and returns NO DATA to the system. Quoth Mic 阅读全文

posted @ 2020-05-27 14:50 ChuckLu 阅读(243) 评论(0) 推荐(0)

NOT IN vs. NOT EXISTS vs. LEFT JOIN / IS NULL: SQL Server

摘要： NOT IN vs. NOT EXISTS vs. LEFT JOIN / IS NULL: SQL Server NOT IN ? 1 2 3 4 5 6 7 SELECT l.id, l.value FROM [20090915_anti].t_left l WHERE l.value NOT 阅读全文

posted @ 2020-05-27 14:35 ChuckLu 阅读(413) 评论(0) 推荐(0)

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