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How do I create an empty array/matrix in NumPy?

I can't figure out how to use an array or matrix in the way that I would normally use a list. I want to create an empty array (or matrix) and then add one column (or row) to it at a time. ...
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JavaScript: What are .extend and .prototype used for?

I am relatively new to JavaScript and keep seeing .extend and .prototype in third party libraries I am using. I thought it had to do with the Prototype javascript library, but I am beginning to think that is not the case. What are these used for? ...
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ExecuteReader requires an open and available Connection. The connection's current state is Connectin

When attempting to connect to MSSQL database via ASP.NET online, I will get the following when two or more people connect simultaneously: ...
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How to set a Timer in Java?

How to set a Timer, say for 2 minutes, to try to connect to a Database then throw exception if there is any issue in connection? ...
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Socket.io rooms difference between broadcast.to and sockets.in

Socket.io's readme contains the following example: 5 Answers 5 ...
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Git clone particular version of remote repository

I cloned a remote git repository about a month ago. The remote repository has undergone many changes and has now become unstable. Now I need another copy of the repository, version identical to the one I cloned a month ago. ...
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Requirejs why and when to use shim config

I read the requirejs document from here API 3 Answers 3 ...
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What is an 'endpoint' in Flask?

The Flask documentation shows : 2 Answers 2 ...
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Will Try / Finally (without the Catch) bubble the exception?

I am almost positive that the answer is YES. If I use a Try Finally block but do not use a Catch block then any exceptions WILL bubble. Correct? ...
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What is the benefit of using Fragments in Android, rather than Views?

When developing for Android , you can set your target (or minimum) sdk to 4 (API 1.6) and add the android compatibility package (v4) to add support for Fragments . Yesterday I did this and successfully implemented Fragments to visualize data from a custom class. ...