Why do this? With the popularization of localization and the support of national policies for the information and innovation industry, some financial and securities industries, government units, etc., have gradually begun to take the route of localization of information and innovation, and more and more people have come into contact with domestic CPUs (arm platform, […]
Tag: containers
Python containers and iterable objects
When you first started learning Python, did you often hear the big guys talking about containers, iterable objects, iterators, generators, list/set/dictionary comprehensions and many other concepts? In fact, this is not what the big guys are doing. Just put aside the professional terminology to pretend to be B, but you need to understand these things. […]
9. Container group control containers
9. Container group control containers 9.1 Combo box QGroupBox A group box provides a frame, a title at the top, keyboard shortcuts, and displays various other widgets within itself. The keyboard shortcut moves the keyboard focus to one of the group box’s child widgets. QGroupBox also allows you to set the title (usually set in […]
Containers (collections) in java, underlying principles of HashMap, differences between ArrayList, LinkedList, and Vector, reasons for hashMap loading factor 0.75
1. Containers in java Collections are mainly divided into two major interfaces: Collection and Map; the sub-interfaces of Collection include List and Set; the implementation classes of List collection include ArrayList, whose bottom layer is an array, and the bottom layer of LinkedList, which is a bidirectional acyclic list and Vector; the implementation classes of […]
[C++] Hash – unordered series containers | Hash conflict | Closed hashing | Open hashing
Article directory 1. Unordered series of associative containers 2. Hash concept 3. Hash collision 4. Hash function 5. Resolve hash conflicts 1. Closed hashing – open addressing method 2. Code implementation 3. Open hashing – open chain method 4. Code implementation 6. Conclusion 1. Unordered series of associative containers In C++98, STL provides a series […]
Using Docker containers on Linux
“Container” is a very popular concept in recent years. It implements a lightweight virtualization environment through the isolation technology provided by the operating system kernel. At present, it has a very wide range of applications in software development and deployment. Docker is a representative software in Linux container technology. It provides users with a convenient […]
Python containers–strings, lists, tuples, dictionaries
String Function: Used to store descriptive data String – Definition # 1. Single quote ‘abc’ # 2. Double quotes ‘abc’ # 3. Triple quotes ‘abc’ str1 = ‘string1’ str2 = “string2” str3 = “””First line second line The third row “”” print(str1) print(str2) print(str3) String – subscript (index) Strings in python can correspond to character […]
32｜Memory management in containers: allocator
In the previous lecture, we discussed the basic tools of memory management in C++, allocation and release functions. Today, let’s discuss the mechanism for managing memory in containers-the allocator. A little history It can be seen from the SGI STL documentation that can be found online that before C++ was standardized, STL had introduced the […]
Containers go into battle easily and go offline gracefully, which is the key to victory or defeat.
Overview Graceful shutdown: Before shutdown, perform a normal shutdown process and release connections and resources, such as our operating system executing shutdown. There are currently many business system components, and the calling relationships between them are relatively complex. The offline or shutdown of one component will involve multiple components. For any online application, how to […]
Docker containers and deployment
Let’s talk briefly about deployment In normal deployment, we need to upload the Tomcat server in the Linux system and execute some decompression commands (such as tar-zxvf), but when deploying docker containers, we only need to pull Tomcat from the central server (center) In a Linux system, the downloaded Tomcat server is equivalent to a […]