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*.h or *.hpp for your class definitions

I've always used a *.h file for my class definitions, but after reading some boost library code, I realised they all use *.hpp . I've always had an aversion to that file extension, I think mainly because I'm not used to it. ...
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How do I choose between Tesseract and OpenCV? [closed]

I recently came across Tesseract and OpenCV . It looks like Tesseract is a full-fledged OCR engine and OpenCV can be used as a framework to create an OCR application/service. ...
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What Computer Science concepts should I know? [closed]

What concepts in Computer Science do you think have made you a better programmer? 33 Answers ...
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Lost connection to MySQL server at 'reading initial communication packet', system error: 0

I am getting error: 31 Answers 31 ...
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input type=file show only button

Is there a way to style (or script) <input type=file /> element to have visible only "Browse" button without text field? ...
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How do I set the UI language in vim?

I saw this on reddit, and it reminded me of one of my vim gripes: It shows the UI in German . Damn you, vim! I want English , but since my OS is set up in German (the standard at our office), I guess vim is actually trying to be helpfull. ...
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Why is creating a Thread said to be expensive?

The Java tutorials say that creating a Thread is expensive. But why exactly is it expensive? What exactly is happening when a Java Thread is created that makes its creation expensive? I'm taking the statement as true, but I'm just interested in mechanics of Thread creation in JVM. ...
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Calculating sum of repeated elements in AngularJS ng-repeat

The script below displays a shop cart using ng-repeat . For each element in the array, it shows the item name, its amount and the subtotal ( product.price * product.quantity ). ...
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How to extract numbers from a string in Python?

I would extract all the numbers contained in a string. Which is the better suited for the purpose, regular expressions or the isdigit() method? ...
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Do you use NULL or 0 (zero) for pointers in C++?

In the early days of C++ when it was bolted on top of C, you could not use NULL as it was defined as (void*)0 . You could not assign NULL to any pointer other than void* , which made it kind of useless. Back in those days, it was accepted that you used 0 (zero) for null pointers. ...