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What is meant by Resource Acquisition is Initialization (RAII)?
...art means that the acquisition happens inside the constructor of a class.
https://www.tomdalling.com/blog/software-design/resource-acquisition-is-initialisation-raii-explained/
What are the differences between Abstract Factory and Factory design patterns?
I know there are many posts out there about the differences between these two patterns, but there are a few things that I cannot find.
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How to correctly implement custom iterators and const_iterators?
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Choose type of iterator which fits your container: input, output, forward etc.
Use base iterator classes from standard library. For example, std::iterator with random_access_iterator_tag.These base classes define all type definitions ...
Angular directives - when and how to use compile, controller, pre-link and post-link [closed]
...ng an Angular directive, one can use any of the following functions to manipulate the DOM behaviour, contents and look of the element on which the directive is declared:
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Why does the 260 character path length limit exist in Windows?
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Quoting this article https://docs.microsoft.com/en-us/windows/desktop/FileIO/naming-a-file#maximum-path-length-limitation
Maximum Path Length Limitation
In the Windows API (with some exceptions discussed in the following paragraphs), the...
Does ruby have real multithreading?
I know about the "cooperative" threading of ruby using green threads . How can I create real "OS-level" threads in my application in order to make use of multiple cpu cores for processing?
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Why does C++ need a separate header file?
I've never really understood why C++ needs a separate header file with the same functions as in the .cpp file. It makes creating classes and refactoring them very difficult, and it adds unnecessary files to the project. And then there is the problem with having to include header files, but having to...
Understanding implicit in Scala
I was making my way through the Scala playframework tutorial and I came across this snippet of code which had me puzzled:
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Simple Digit Recognition OCR in OpenCV-Python
I am trying to implement a "Digit Recognition OCR" in OpenCV-Python (cv2). It is just for learning purposes. I would like to learn both KNearest and SVM features in OpenCV.
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How to echo with different colors in the Windows command line
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You should see a green "HI" below it.
Code numbers can be found here:
https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
Notepad:
To save this into notepad, you can type ESC into it using: Alt+027 with the numpad, then the [32m part. Another trick when I was on a laptop, redirect the line ...