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Why is string concatenation faster than array join?

Today, I read this thread about the speed of string concatenation. 9 Answers 9 ...
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Separation of business logic and data access in django

I am writing a project in Django and I see that 80% of the code is in the file models.py . This code is confusing and, after a certain time, I cease to understand what is really happening. ...
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Difference between binary semaphore and mutex

Is there any difference between a binary semaphore and mutex or are they essentially the same? 34 Answers ...
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Should I use Vagrant or Docker for creating an isolated environment? [closed]

... use Ubuntu for development and deployment and have a need for creating an isolated environment. 10 Answers ...
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Why don't self-closing script elements work?

What is the reason browsers do not correctly recognize: 12 Answers 12 ...
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vs

... In HTML5, they are equivalent. Use the shorter one, it is easier to remember and type. Browser support is fine since it was designed for backwards compatibility. share | improve ...
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Why does Git say my master branch is “already up to date” even though it is not?

... I think your basic issue here is that you're misinterpreting and/or misunderstanding what git does and why it does it. When you clone some other repository, git makes a copy of whatever is "over there". It also takes "their" branch labels, su...
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How are the points in CSS specificity calculated

Researching specificity I stumbled upon this blog - http://www.htmldog.com/guides/cssadvanced/specificity/ 7 Answers ...
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What's the difference between Task.Start/Wait and Async/Await?

I may be missing something but what is the difference between doing: 6 Answers 6 ...
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Are memory leaks ever ok? [closed]

Is it ever acceptable to have a memory leak in your C or C++ application? 50 Answers ...