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Center a position:fixed element

...up box centered to the screen with a dynamic width and height. I used margin: 5% auto; for this. Without position: fixed; it centers fine horizontally, but not vertically. After adding position: fixed; , it's even not centering horizontally. ...
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Why are C++ inline functions in the header?

NB This is not a question about how to use inline functions or how they work, more why they are done the way they are. 8 An...
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Error while installing json gem 'mkmf.rb can't find header files for ruby'

For context, it on a remote server which has a firewall. I'm setting up my environment through a proxy. I have ruby 1.8.7 . When I try to gem install.. ...
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“Cross origin requests are only supported for HTTP.” error when loading a local file

I'm trying to load a 3D model into Three.js with JSONLoader , and that 3D model is in the same directory as the entire website. ...
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Numpy matrix to array

I am using numpy. I have a matrix with 1 column and N rows and I want to get an array from with N elements. 9 Answers ...
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Jinja2 template variable if None Object set a default value

How to make a variable in jijna2 default to "" if object is None instead of doing something like this? 9 Answers ...
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What is the purpose of a stack? Why do we need it?

So I am learning MSIL right now to learn to debug my C# .NET applications. 7 Answers 7...
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How do I monitor the computer's CPU, memory, and disk usage in Java?

I would like to monitor the following system information in Java: 11 Answers 11 ...
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Convert UTC Epoch to local date

I have been fighting with this for a bit now. I’m trying to convert epoch to a date object. The epoch is sent to me in UTC. Whenever you pass new Date() an epoch, it assumes it’s local epoch. I tried creating a UTC object, then using setTime() to adjust it to the proper epoch, but the only m...
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Is there any way to git checkout previous branch?

I sort of want the equivalent of cd - for git. If I am in branch master and I checkout foo , I would love to be able to type something like git checkout - to go back to master , and be able to type it again to return to foo . ...