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Links to the original text: https://my.oschina.net/mohaiyong/blog/221240 ECC ECC-Elliptic Curves Cryptography (ECC-Elliptic Curves Cryptography) is one of the most intensive public ke ...

Links to the original text: https://my.oschina.net/mohaiyong/blog/221266 DH Diffie-Hellman algorithm (D-H algorithm), key agreement protocol. It is an idea put forward by Diffie and H ...

(Horsehoneycomb technology original content, public ID: mfwtech) A study from Akamai found that after interviewing 1,048 online shoppers: About 47% of users expect their pages to load in two seconds. If the page load time exceeds 3 seconds, about 40% of users will choose to leave or close the page.   For a long time, in order to i ...

pthread Thread Knowledge Points The two fundamental issues of communication between threads are mutual exclusion and synchronization.` #include<pthread.h> 1. pthread_create1. Function Prototypeint pthread_create(pthread_t tidp,const pthread_attr_t attr,(void)(start_rtn)(void),void arg); 2. Functional functions:pthread_create is a functio ...

Manual Memory Management in MRC Era In iOS, the memory of OC objects is managed by reference counting. A newly created OC object reference count defaults to 1. When the reference count is reduced to 0, the OC object will be destroyed and its occup ...

brief introduction Elasticsearch Elastic search is a real-time distributed search and analysis engine that allows you to explore your data at a speed and scale you've never had before. It is used as a combination of full-text retrieval, structured search, analysis and the three functions. Support cluster configuration. Logstash/Filebea ...

Definition of Design Patterns: Simple and Elegant Solutions for Specific Problems in Object-Oriented Software Design Design patterns are some of the solutions that predecessors summed up to solve a specific scenario. Maybe it's normal to feel that the design pattern is not so well understood when you first get into contact with programming with ...

Catalog Modular What is a module? Four Forms of Modules Why use modules How to use modules import from...import... similarities and differences Cyclic Import Problem Solution 1. 2. Module Search Path random module ...

SQL Prompt It is a practical SQL grammar prompt tool. SQL Prompt automatically retrieves the database object name, grammar and code fragments to provide users with appropriate code selection. Automatic script settings make code easy to read -- especially when developers are not familiar with scripts. SQL Prompt can be installed and used, which ...

If the crawler does not have exception handling, the program will crash and stop working once an error occurs in the crawl, and exception handling can continue even if an error occurs. 1. Common status codes 301: redirect to a new URL, permanent 302: Redirected to temporary URL, non-permanent 304: Reque ...