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How are 3D games so efficient? [closed]

There is something I have never understood. How can a great big PC game like GTA IV use 50% of my CPU and run at 60fps while a DX demo of a rotating Teapot @ 60fps uses a whopping 30% ? ...
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What's the meaning of “=>” (an arrow formed from equals & greater than) in JavaScript?

I know that the >= operator means more than or equal to, but I've seen => in some source code. What's the meaning of that operator? ...
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Difference between \w and \b regular expression meta characters

Can anyone explain the difference between \b and \w regular expression metacharacters? It is my understanding that both these metacharacters are used for word boundaries. Apart from this, which meta character is efficient for multilingual content? ...
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Why compile Python code?

Why would you compile a Python script? You can run them directly from the .py file and it works fine, so is there a performance advantage or something? ...
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What is an Endpoint?

I have been reading about OAuth and it keeps talking about endpoints. What is exactly an endpoint? 11 Answers ...
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Sass calculate percent minus px

I want to be able to do the following: 6 Answers 6 ...
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Add a reference column migration in Rails 4

A user has many uploads. I want to add a column to the uploads table that references the user . What should the migration look like? ...
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Inject errors into already validated form?

After my form.Form validates the user input values I pass them to a separate (external) process for further processing. This external process can potentially find further errors in the values. ...
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Can two different strings generate the same MD5 hash code?

For each of our binary assets we generate a MD5 hash. This is used to check whether a certain binary asset is already in our application. But is it possible that two different binary assets generate the same MD5 hash. So is it possible that two different strings generate the same MD5 hash? ...
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Converting String To Float in C#

I am converting a string like "41.00027357629127", and I am using; 7 Answers 7 ...