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Upgrade python in a virtualenv

...you will need to see your virtualenv version). If your virtualenv is installed with the same python version of the old one and upgrading your virtualenv package is not an option, you may want to read this in order to install a virtualenv with the python version you want. EDIT I've tested this ap...
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Can you call Directory.GetFiles() with multiple filters?

...er, var files = Directory.EnumerateFiles("C:\\path", "*.*", SearchOption.AllDirectories) .Where(s => s.EndsWith(".mp3") || s.EndsWith(".jpg")); For earlier versions of .NET, var files = Directory.GetFiles("C:\\path", "*.*", SearchOption.AllDirectories) .Where(s => ...
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Static Indexers?

...follows: public class Utilities { private static ConfigurationManager _configurationManager = new ConfigurationManager(); public static ConfigurationManager ConfigurationManager => _configurationManager; } public class ConfigurationManager { public object this[string value] { ...
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How to merge two arrays in JavaScript and de-duplicate items

... With Underscore.js or Lo-Dash you can do: console.log(_.union([1, 2, 3], [101, 2, 1, 10], [2, 1])); <script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.min.js"></script> http://underscorejs.org/#union http://lodash.com/docs#union ...
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Turning off some legends in a ggplot

... You can use guide=FALSE in scale_..._...() to suppress legend. For your example you should use scale_colour_continuous() because length is continuous variable (not discrete). (p3 <- ggplot(mov, aes(year, rating, colour = length, shape = mpaa)) + sca...
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ipython: print complete history (not just current session)

... First use %hist -o -g -f ipython_history.md to output the history (input and output) to a text file. (http://ipython.readthedocs.io/en/stable/interactive/magics.html#magic-history) Then you can use the the get_session_info function to retreive the date and...
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How to Generate unique file names in C#

...e: public string GenerateFileName(string context) { return context + "_" + DateTime.Now.ToString("yyyyMMddHHmmssfff") + "_" + Guid.NewGuid().ToString("N"); } filename1 = GenerateFileName("MeasurementData"); filename2 = GenerateFileName("Image"); This way, when I sort by filename, it will aut...
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How to check for a valid Base64 encoded string

... calling base64String.Contains multiple times may result in poor performance incase of base64String being a large string. – NucS Jul 23 '15 at 11:46 ...
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How to get memory available or used in C#

... It should probably be noted that a call to GetCurrentProcess will itself allocate quite a lot of resources. Call Dispose on the returned process when done, or wrap the whole code in a "using" scope. – Mathias Lykkegaard Lorenzen ...
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When should I choose Vector in Scala?

It seems that Vector was late to the Scala collections party, and all the influential blog posts had already left. 6 Answ...