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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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Jackson enum Serializing and DeSerializer

... I really dislike this solution for the simple fact that you introduce two sources of truth. The developer will always have to remember to add the name in two places. I much prefer a solution that just does the right thing without...
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How do I find and view a TFS changeset by comment text?

... With the Power Tools installed: tf history $/ -r | ? { $_.comment -like '*findme*' } share | improve this answer | follow ...
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Get the IP address of the machine

...hould be the same below. I've done a quick example below which will print all of the machine's IPv4 address, (you should also check the getifaddrs was successful ie returns 0). I've updated it show IPv6 addresses too. #include <stdio.h> #include <sys/types.h> #include <ifaddr...
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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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How to find a Java Memory Leak

... supposed to be able to find the root reference ( ref ) or whatever it is called. Basically, I can tell that there are several hundred megabytes of hash table entries ([java.util.HashMap$Entry or something like that), but maps are used all over the place... Is there some way to search for large maps...
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Java String - See if a string contains only numbers and not letters

...ic class StringIsNumberBenchmark { private static final long CYCLES = 1_000_000L; private static final String[] STRINGS = {"12345678901","98765432177","58745896328","35741596328", "123456789a1", "1a345678901", "1234567890 "}; private static final Pattern PATTERN = Pattern.compile("\\d+")...
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How do I programmatically click a link with javascript?

... Actually, so far it worked in all browsers I tried, including IE, Safari, Chrome, Firefox and Opera. – arik Jan 29 '12 at 17:17 ...
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What are all the common undefined behaviours that a C++ programmer should know about? [closed]

What are all the common undefined behaviours that a C++ programmer should know about? 11 Answers ...
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Does the 'mutable' keyword have any purpose other than allowing the variable to be modified by a con

...able of a class with the mutable keyword. As far as I can see it simply allows you to modify a variable in a const method: ...