whats reflection

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KVO and KVC are short for Key-Value Observing and Key-Value Coding respectively. I think of this topic because the update of the tableView I wrote is polling every few seconds. I was wondering if I needed a mechanism similar to triggering the update.

78 golden rules for java programming and 78 golden rules for java   Create and destroy objects1. Consider replacing the constructor with the static factory method (the static method of the returned class instance ).2. When encountering

Creating and destroying objects1. Consider replacing the constructor with a static factory method (static method that returns an instance of the class)2. When encountering multiple constructor parameters, consider using the constructor3. Hardening

Java has been born since 1995, has been more than 20 years of history.Java is the source of the name: Java is the English name of the Indonesian island of Java, known for its rich coffee. Many of the library class names in the Java language are

SOURCE Reference: Https://docs.microsoft.com/zh-cn/dotnet/csharp/whats-new/csharp-7"VS2017 Support"1.out variable (out variables)Before the out parameter needs to be declared in advance outside the calling method, c#7.0 allows the out parameter to