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Regular cast vs. static_cast vs. dynamic_cast [duplicate]
I've been writing C and C++ code for almost twenty years, but there's one aspect of these languages that I've never really understood. I've obviously used regular casts i.e.
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Is an array name a pointer?
...onfusing is that you can also write this:
p = a;
This does not copy the contents of the array a into the pointer p (whatever that would mean). Instead, the array name a is converted to a pointer to its first element. So that assignment does the same as the previous one.
Now you can use p in a si...
How do I fix blurry tm>ex m>t in my HTML5 canvas?
...have a view adapter that creates a canvas dynamically, and fills it with content. This works really nicely, m>ex m>cept that my tm>ex m>t is rendered very fuzzy/blurry/stretched. I have seen a lot of other posts on why defining the width and height in CSS will cause this issue, but I define it all in ...
Batch script: how to check for admin rights
How do I check if the current batch script has admin rights?
27 Answers
27
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What are the differences between type() and isinstance()?
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To summarize the contents of other (already good!) answers, isinstance caters for inheritance (an instance of a derived class is an instance of a base class, too), while checking for equality of type does not (it demands identity of types and...
How do I add a library project to Android Studio?
... + lib1/
| build.gradle
+ lib2/
| build.gradle
The content of settings.gradle is very simple:
include ':app', ':libraries:lib1', ':libraries:lib2'
This defines which folder is actually a Gradle project.
The :app project is likely to depend on the libraries, and th...
Determine project root from a running node.js application
...sty3 the settings module is actually an empty module that is m>ex m>porting the content of a file in the project root :P
– Fareed Alnamrouti
May 5 '17 at 9:58
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What are the rules about using an underscore in a C++ identifier?
It's common in C++ to name member variables with some kind of prefix to denote the fact that they're member variables, rather than local variables or parameters. If you've come from an MFC background, you'll probably use m_foo . I've also seen myFoo occasionally.
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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
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使用 MIT App Inventor 控制低功耗蓝牙设备
本文介绍了用于低功耗蓝牙 (BLE) 设备的 App Inventor 组件的初始设计和测试。
从家用电器到可穿戴配件，物联网设备的兴起导致对能够控...
Why do we need tuples in Python (or any immutable data type)?
...eference, you can compare two variables by comparing location, rather than content
interning: you need to store at most one copy of any immutable value
there's no need to synchronize access to immutable objects in concurrent code
const correctness: some values shouldn't be allowed to change. This (t...