A few years ago, screen adaptation has been a major problem that troubled Android development engineers. However, with the birth of various screen adaptation solutions in recent years and the launch of various Google adaptation controls, screen adaptation has become increasingly easier. Below, we will summarize the skills about screen adaptation. ConstraintLayout Many Android engineers […]
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Vue skills revealed: The difference and performance comparison between v-show and v-if are clear at a glance
Jiangcheng Cheerful Pea: Personal homepage Personal column :《VUE》《javaScript》 Personal website : “Jiangcheng Cheerful Pea” The ideal of life is for an ideal life! Table of Contents ? Column introduction Article introduction 1. Common points between v-show and v-if 2. The difference between v-show and v-if 3. Analysis of v-show and v-if principles v-show principle v-if […]
Data analysis tool: Application skills of Python counter Counter
More learning content Counter is a powerful tool provided in the collections module of the Python standard library, which is used to count the occurrences of hashable objects. The use of counters is very flexible and can solve various counting and statistical problems. This article introduces counters in Python, including their basic usage, advanced features, […]
Noip simulation competition multi-school eighth game T3 remote control robot (shortest path + skill points)
Question Brief question meaning: Give you one n n n points m m A graph with m edges. side i i i has color c i c_i ci?. You can select some edges and change their color to become intervals [ 1 , m ] [1,m] Any color in [1,m], change an edge i i […]
Python acceleration running skills
Python is a scripting language that has some shortcomings in efficiency and performance compared to compiled languages such as C/C++. However, there are many times when Python’s efficiency is not as exaggerated as imagined. This article summarizes some tips for speeding up the running of Python code. 0. Code optimization principles This article will introduce […]
DDL (data definition) language in SQL: Key skills to master data definition language!
“Here is Cloud Source IT, helping you learn IT easily” Hi~ How are you doing today? The process of getting better is not very comfortable. Try harder – 2023.11.03 – DDL (Data Definition Language) is a language used to describe real-world entities to be stored in a database. Previously, we introduced the related concepts and […]
Quickly learn data structures | Are you stumped by using queues to implement stacks? That’s because you haven’t mastered the skills well
Ge Zhigu: Personal homepage Personal column: “Linux Advanced Learning Diary” “C++ Dry Information Base” The ideal of life is for an ideal life! Preface hello! Hello everyone, we have learned about stacks and queues, so do you know how to use queues to implement stacks? . This article will show you how to use queues […]
Python’s 5 super practical skills, there are definitely things you can’t think of!
Article directory Preface 1. Dictionary comprehensions and Set comprehensions 2. Use Counter counting object when counting 3. Beautifully print out JSON 4. Create small, one-off, fast web services 5. Python’s amazing open source community About Python technical reserves 1. Learning routes in all directions of Python 2. Python basic learning video 3. Excellent Python learning […]
Linux signal (signal kill alarm raise abort settimer sigaction SIGCHLD recycles child process)
1. Basic concepts of signals: 1. Signal mechanism When process A sends a signal to process B, once process B receives the signal, it will stop the executing process and process the signal. After processing the signal, it will continue to return to execute the previous process. It can be seen that the priority of […]
4 Python deductive development skills you must know!
For data science, Python is usually widely used for data processing and transformation. It provides powerful data structure processing functions to make data processing more flexible. What does “flexibility” mean here?< /strong> This means that there are always multiple ways to achieve the same result in Python, we always have different methods and need to […]