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Category: Design Pattern

Design pattern (Design pattern) is a set of code design experience that has been used repeatedly and is known to most people. The use of design patterns is to reusable code, make it easier for others to understand, and ensure code reliability. There is no doubt that design patterns are win-win for others and systems; design patterns make code preparation truly engineering; design patterns are the cornerstone of software engineering, just like the structure of a building.

War packaging has no terminal dependence and SBT

I want to build and package my SBT project as a .war file. I found the plugin xsbt-web-plugin, but it requires Jetty dependencies that I don’t need because I use Apache Tomcat for production and de

September 30, 2021By Simo Design Pattern dependence, no, Packaging, pier, SBT, WarLeave a Comment

Haskell – Unclear Type Variables of Dependent Constraints

I am writing a new authentication system for the Snap web framework, because the built-in authentication system is not modular enough, and it has some redundancy/”self-respect” features. However, t

September 30, 2021By Simo Design Pattern class, Constraint, depends, Haskell, type, unclear, variableLeave a Comment

How to use aggregates with list names

How do I summarize the aggregation in a function by passing a list of conditions and values?

# This works fine:
x <- data.frame(cond1 = sample(letters[1:3], 500, replace=TRUE) , cond2 = sam

September 30, 2021By Simo Design Pattern aggregate, column name, How to, List, TogetherLeave a Comment

What is the meaning of design specification in project documentation?

Can anyone help me understand the meaning of the design specifications in the project documentation? In a software environment, a design specification is usually a design document that describes

September 30, 2021By Simo Design Pattern Design specification, Document, meaning, middle, project, whatLeave a Comment

How to use Pandas aggregate DateTime objects to int

I have this DataFrame structure

id time number
0 1 1970-01-01 00: 00:00 1
1 2 1970-01-02 00:00:00 2
2 1 1970-01-03 00:00:00 2 I want groupby id And aggregate the time of pd.Datetime dtype int

September 30, 2021By Simo Design Pattern aggregate, DateTime, how to use, int, object, PandasLeave a Comment

CMAKE Custom Definition Dependent Diagram

Should CMake’s –graphviz option depend on a custom target?

Sample CMakeLists.txt file:

cmake_minimum_required(VERSION 2.8)
add_executable(target0 test.cpp)
add_dependencies(target0 tar

September 30, 2021By Simo Design Pattern CMake, customization, dependency, goal, Map, relationshipLeave a Comment

What is the best strategy for user input-dependent injection?

I have used quite a lot of dependency injection, but I want to get input on how to process information from the user at runtime.

I have A class that connects to the com port. I allow the user

September 30, 2021By Simo Design Pattern dependence, dependency, injection, input, optimal, Strategy, user, whatLeave a Comment

Azure – Improve CD Pipeline using Service Fabric

We have built a Web API on the service structure, and there are also some web projects in the web application in Azure. We hope to easily exchange back to the old version of the application and imp

September 30, 2021By Simo Design Pattern CD, PipelineLeave a Comment

DDD: Whether the service is injected into the entity

I have a Zone object tree:

class Zone {
protected $parent;

public function __construct(Zone $parent) {
$this->parent = $parent;
}
} There are no children or descendants in the zone Attr

September 30, 2021By Simo Design PatternLeave a Comment

SBT: Add the dependence on the ScaLatest library. Where is?

I created a scala project using SBT and wrote some unit test cases using scalatest. But somehow, sbt test cannot find the org.scalatest package.

This is my project definition file:

>The

September 30, 2021By Simo Design Pattern addition, dependence, Library, pair, SBT, scalest, WhereLeave a Comment

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