Programmer Think

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Sketch Recently, due to project requirements, many articles about scss public have been reviewed. Here is a brief summary of those articles Solution a. When we want to use the sharing of scss files, first we need to think about how we should edit scss files, such as reducing the coupling between variables and mixing in scss files. We can sepa ...

I. TCP based half shutdown 1. Problems caused by unilateral disconnection The close function of Linux and the closesocket function of Windows mean complete disconnection. Complete disconnection means that the input and output streams are disconnected at the same time. If host A no longer needs to transmit data to host B, and ...

1. Goroutine synchronization [data synchronization] Why goroutine synchronization is needed The concept of gorotine synchronization and several ways of synchronization 1.1 why goroutine synchronization is needed package main import ( "fmt" "sync" ) var A = 10 var wg = sync.WaitGroup{} func Add(){ defer wg.Don ...

The source code of this article is based on jdk8 version. Let's talk about the core basic and key and difficult knowledge of hashMap Summary 1. Constructor II. put operation 1. hash function 2. Array subscript calculation 3. Operation steps summary III. resize Expansion of jdk1.8 How to avoid the concurrent problem that leads to the chai ...

In the previous article, the default cell selected for UICollectionView is that each cell has a corresponding identity, which means that the reuse mechanism of UICollectionView is abolished. For less data, it is OK, but for larger data, it will cause performance problems. So I think that under the reuse mechanism of UICollectionView, the gener ...

Title: it is known that the mobile phone number is an 11 digit string composed of 0-9 and so on. Now, it is judged whether it is the correct mobile phone number according to the entered characters Requirements: 1. If the input string starts with any group of 151, 153, 173, 180, 193 and consists of just 11 digits, then the output is:% s is ok ...

I. transfer value from parent component to child component 1. Create a child.vue under the src/components / folder 2. Create props in child.vue and add a new title attribute <template> <div> <h1>child Sub components</h1> <div>{{title}}</div> </div> </template> <script> export default { ...

There's no load, just a way to tell if the scroll bar has reached the bottom of the browser If it arrives, the event will be triggered. If it arrives, it will not be handled. The calculation formula is simple: the bottom is equal to (0) = the height of the scroll bar - the distance between the top of the scroll bar and the visible height. The ...

exception handling Exception classification and architecture: Error-related types of exceptions are exceptions that programs cannot handle (most of which are unresolved by modifying code), and these exceptions often require us to adjust the JVM's operating environment Exception-related types of exceptions are exceptions that programs can handl ...