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Validating IPv4 addresses with regexp

...so it ends with a word boundary rather than with the end of line? Additionally here I've marked the non-capturing groups to avoid unwanted sub-matches. NB: This still doesn't take into account @dty's comment as I'm not familiar with that form of IP; though he's correct that it seems valid. ...
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How to create a density plot in matplotlib?

...with R. This is because gaussian_kde tries to infer the bandwidth automatically. You can play with the bandwidth in a way by changing the function covariance_factor of the gaussian_kde class. First, here is what you get without changing that function: However, if I use the following code: import...
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How can I get dictionary key as variable directly in Python (not by searching from value)?

...+ add () to print. – Honiix Dec 12 '16 at 9:03 add a comment  |  ...
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What is the difference between HTTP_HOST and SERVER_NAME in PHP?

...T is obtained from the HTTP request header and this is what the client actually used as "target host" of the request. The SERVER_NAME is defined in server config. Which one to use depends on what you need it for. You should now however realize that the one is a client-controlled value which may thus...
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Getting the name of a child class in the parent class (static context)

... answered Jul 22 '09 at 16:43 Jon47Jon47 ...
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How does collections.defaultdict work?

... Usually, a Python dictionary throws a KeyError if you try to get an item with a key that is not currently in the dictionary. The defaultdict in contrast will simply create any items that you try to access (provided of course th...
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Can someone explain the right way to use SBT?

...tarted, and why? I think the sane point is to build immunity to sbt gradually. Make sure you understand: scopes format {<build-uri>}<project-id>/config:key(for task-key) the 3 flavors of settings (SettingKey, TaskKey, InputKey) - read the section called "Task Keys" in http://www.sc...
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How to download a file from a URL in C#?

...", "Password");' – Developer Sep 7 '16 at 13:11 4 A welcome side effect: This method also support...
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NSAttributedString add text alignment

...paragraphRef}; NSAttributedString *attributedString = [[NSAttributedString alloc] initWithString:@"Hello World" attributes:attributes]; share | improve this answer | follow ...
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Select multiple records based on list of Id's with linq

I have a list containing Id's of my UserProfile table. How can i select all UserProfiles based on the list of Id's i got in a var using LINQ ? ...