Programmer Group

What is modular development? In front-end development, it can achieve some basic interaction effect as long as several dozens or hundreds of lines of code are embedded in script tags at first. Then js is valued and widely used. The help of jQuery, Ajax, Node.Js, MVC, MVVM, etc. also makes front-end development important and makes front-end pro ...

brief introduction Gos built-in maps do not support concurrent write operations, because map write operations are not concurrently secure. When you try multiple Goroutine operations on the same map, an error occurs: fatal error: concurrent map writes. So sync.Map has been officially introduced to accommodate concurrent programming applications. ...

My LeetCode brush Title source [GitHub]: https://github.com/izhoujie/Algorithmcii LeetCode 945. Make the array the only minimum increment subject Given an array of integers A, any A[i] is selected and incremented by 1 for each move operation. Returns the minimum number of operations that make each value in A unique. Example 1: Input: [1,2,2] ...

Foreword: Today I will tell you: MySQL database table fuzzy/multiline/grouping/sorting/paging query and MySQL data type explanation, of course, if you are interested in the basic operation of the database--database creation/table addition/deletion check, you can see my article-- Basic operations for MySQL database tables (add, delete, change ch ...

Preface Remember the fear of being dominated by bat.It's really hard to write bat scripts than shell scripts. Now that you understand these advanced languages, such as java js, it's easy to understand shell s.Learn simple grammar, look at scripts in familiar applications like tomcat and nacos, and learn other people's skills. It's about getting ...

Preceding text Quick introduction to golang [1] - Introduction to go golang quick start [2.1]-go language development environment configuration windows golang quick start [2.2]-go language development environment configuration - macOS golang quick start [2.3]-go language development environment configuration linux Get started with golang [3]- ...

Catalog Quick sorting and merging of JS sorting algorithm Quick sort Merge sort Quick sorting and merging of JS sorting algorithm Quick sort Principle: select a key (generally the first element) and divide the array into two regions. All the regions on the left are less than or equal to the key, ...

Today, let's talk about the addition, deletion, modification and query of ES, which is helpful to understand the code of spring boot integration es next week. First of all, we create an index of EST first, and then if all the screenshots are taken, the reading fluency is too low, so we will use the shorthand form [request type URL] next. The f ...

Catalog Simple sorting of JS sorting Bubble sort Direct insert sort Direct selection sorting Simple sorting of JS sorting Bubble sort Time complexity: O(n^2) Stable sorting algorithm Features: looking from the back to the front, all the numbers in the ordered area must be less than (or g ...

In software engineering, Creative mode is a design mode that deals with object creation, trying to create objects in an appropriate way according to the actual situation.Basic object creation can lead to design problems or increase design complexity.Creative mode solves problems by controlling the creation of objects in some way. Common creati ...