Programmer Think

Welcome to WeChat official account: FSA full stack operation 👋 1, Dart asynchronous Like JavaScript, Dart is a single thread model based on event loop mechanism, so there is no multithreading in Dart, so there is no distinction between main thread and sub thread 1. Synchronous and asynchronous Synchronization: in the same thread, execute ...

The article covers the following knowledge points: How and when to use async and await keywords.How to use async and await to affect the execution order.How to use try catch to handle asynchronous call exceptions. 1, Why is asynchronous code important Asynchronous operations allow programs to complete work while waiting for another opera ...

Date and time stamp You can use datetime to get the current date from the fluent Now(). now.millisecondsSinceEpoch can get the timestamp What is a timestamp "Timestamp" refers to the total number of seconds from 00:00:00 GMT on January 1, 1970 (08:00:00 GMT on January 1, 1970) to now. Generally speaking, timestamp is a comple ...

preface Q: What's the most smelly thing you've ever smelled in your life? A: My rotten dream. Brother Meng!!! I'm here again! This time, I can confidently say to you: I finally brought you a pub package that can really help you solve many pit ratio scenes! Put the previous shuttle_ smart_ Dialog, on the basis of maintaining the stabi ...

brief introduction Many asynchronous programming skills in dart were introduced before. I wonder if you have found a problem. If it is asynchronous programming in java, locking and concurrency mechanisms will certainly be mentioned, but for dart, it seems that you have never heard of multithreading and concurrency. Why? Today, let's explain th ...

1, Functions 1. Custom method //main entry method void main() { //Call method printInfo(); //Custom methods can also be defined inside the main method int getNum() { return 1; } print(getNum()); } //The custom method void has no return value void printInfo() { print("Custom method"); } 2. Location optional parameter m ...

brief introduction File operation is a very common operation in IO. Is it easy to operate files in dart language? In fact, dart provides two ways to read files, one is to read all files at once, and the other is to read files as streams. The disadvantage of one-time reading is that you need to load all the file contents into memory at one tim ...

brief introduction Although dart can be used as both client and server, dart is basically used as the basic language for fluent development. In addition to Android and ios, the web is the most common and common platform. Dart also provides native support for HTML, which is dart:html package. dart:html provides various useful operations on DOM ...

In actual apps, pull-down refresh and slide up loading are more common forms of interaction. In the Flutter, there is a Flutter_ The easyrefresh open source plug-in is used to implement pull-down refresh and slide up load. This article introduces stateful components and fluent_ The basic application of easyrefresh completes asynchronous data lo ...

List is the most common form in App. ListView is provided in fluent to implement the list. This article will implement a list with pictures and texts through ListView. Interface layout analysis The list to be implemented in this chapter is shown in the figure above. After we get the interface design draft, the first thing we do in UI devel ...