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Creating an abstract class in Objective-C
I'm originally a Java programmer who now works with Objective-C. I'd like to create an abstract class, but that doesn't appear to be possible in Objective-C. Is this possible?
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Why are Python's 'private' methods not actually private?
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When I first came from Java to Python I hated this. It scared me to death.
Today it might just be the one thing I love most about Python.
I love being on a platform, where people trust each other and don't feel like they need to build impenetrabl...
How can I check if a view is visible or not in Android? [duplicate]
...ng method getVisibility(). Method names prefixed with 'get' and 'set' are Java's convention for representing properties. Some language have actual language constructs for properties but Java isn't one of them. So when you see something labeled 'setX', you can be 99% certain there's a correspondin...
How to test if a double is an integer
...gative zero, then the result is the same as the argument." docs.oracle.com/javase/6/docs/api/java/lang/…
– Tim Schmelter
Mar 27 '12 at 22:27
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What's the difference between Jetty and Netty?
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Jetty is a lightweight servlet container, easy to embed within a java application, there is an easy to use jetty client also.
Netty is an asynchronous event-driven network application framework.
You can write your own servlet container or http client app with help of the Netty framework f...
How to convert a List into a comma separated string without iterating List explicitly [dupli
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With Java 8:
String csv = String.join(",", ids);
With Java 7-, there is a dirty way (note: it works only if you don't insert strings which contain ", " in your list) - obviously, List#toString will perform a loop to create idLi...
Python != operation vs “is not”
... My favorite way to comprehend this is: Python's is is like Java's ==. Python's == is like Java's .equals(). Of course this only helps if you know Java.
– MatrixFrog
Feb 5 '10 at 20:54
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使用App Inventor 2 控制物联网设备/低功耗蓝牙设备(BLE) · App Inventor 2 中文网
...动应用程序。 与传统的Android应用程序开发通常需要使用Java编程不同，App Inventor封装了Android开发模型，并通过图形块隐藏了实现细节，使得Java编程代码对用户来说是不可见的。
因此，在 App Inventor 中构建应用程序只需要通过将...
Getting “Skipping JaCoCo execution due to missing execution data file” upon executing JaCoCo
...t was because my surefire plugin was only looking for files named **/*Test.java when my test classes were named *Tests.java
– Roger Worrell
Apr 30 '19 at 18:54
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What is difference between Errors and Exceptions? [duplicate]
How can I differentiate between Errors and Exceptions in Java?
4 Answers
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