Canvas Getting Started 6 requestAnimationFrame for Animation

The learning resources for this article come from "Graphics, Animation and Game Development of HTML5 Canvas Core Technologies" Try not to use setInterval and setTimeout to animate, but rather use the requestAnimationFrame() method to let the browser decide the frame rate on its own. Because browsers differ in the implementation of ...

Added by dawho9 on Tue, 07 Jul 2020 17:40:43 +0300

UILabel for Masonry Learning

First see the effect: Code: - (id)init { self = [super init]; if (!self) return nil; // text courtesy of http://baconipsum.com/ self.shortLabel = UILabel.new; self.shortLabel.numberOfLines = 1; self.shortLabel.textColor = [UIColor purpleColor]; self.shortLabel.lineBreakMode = NSLineBre ...

Added by vijdev on Mon, 06 Jul 2020 18:35:20 +0300

1050. Spiral Matrix (25) PAT Class B True Theme

1050. Spiral Matrix (25) This question requires that the given N positive integers be filled in a "spiral matrix" in a non-increasing order.The so-called "spiral matrix" refers to filling in a clockwise spiral direction starting from the first grid in the upper left corner.The size of the matrix is required to be ...

Added by nuttynibbles on Mon, 06 Jul 2020 18:12:00 +0300

WeChat Public Number Development (2) Acquire AccessToken, jsapi_ticket

Access Token Access Token plays an important role in the development of WeChat public platform interface, which is equivalent to the key to access various interfaces. Only by getting this key can we call other special interfaces. access_token is the globally unique ticket for the public number, which calls each interf ...

Added by bschwarz on Sat, 04 Jul 2020 19:15:58 +0300

iOS Development Notes | custom label with inner margin

iu preface UIScrollView has contentInset, but UILabel doesn't; Android does, iOS doesn't. Recently, I need to use a label with inner margin, so I encapsulated it with the code of my predecessors on the Internet. Originally, I wanted to create a category, but it failed. The code is as follows, inherited from UILabel: . h file: #impo ...

Added by Goofan on Sat, 04 Jul 2020 19:08:54 +0300

Spring Boot Tutorial 4: Using Druid and Monitoring Configuration

Druid is the best database connection pool in the Java language and provides powerful monitoring and extension capabilities. After comparing Druid with HikariCP, although HikariCP has a higher performance than Druid, Druid includes many dimensions of statistical and analytical functions, which is why everyone chooses t ...

Added by cwarn23 on Sat, 04 Jul 2020 18:32:49 +0300

21. Use of AlertDialog Common Dialog

Target Effect In this interface, there is a text input box and a button, enter content in the text input box, then click the button to bring up a customized normal dialog box, in which the prompt information is the information entered in the text box. The target effect map is as follows: Page Layout <LinearLa ...

Added by daniel_lee_hill on Sat, 04 Jul 2020 18:22:34 +0300

CentOS 7.0 Firewall On/Off

CentOS 7.0 uses firewall as a firewall by default and uses systemctl to manage services and programs, including service and chkconfig 1. View the default firewall status (not running when turned off, running when turned on) [root@localhost ~]# firewall-cmd --state not running 2. Check the status of the firewall [ro ...

Added by kabucek on Fri, 03 Jul 2020 19:18:49 +0300

100% Perfect Friend Sharing

Step 1: go Federation Official Website Register an account to create an application (the application name matches the project name), a detailed step you can refer to Friends QQ Login Skipping this time, text Import jar package add permission <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-p ...

Added by parag on Fri, 03 Jul 2020 18:09:04 +0300

Python uNew_u uInit_u uCall_uDetailed

new __new__(cls, *args, **kwargs) Create an instance (usually cls or other types of instances) init __init__(self, *args, **Kwargs) After the instance is created by new, it is executed before being returned to the caller If new returns an instance of cls, the init method is automatically executed, self is the instance created, and the in ...

Added by tysoncane on Fri, 03 Jul 2020 17:41:10 +0300