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Fixed size queue which automatically dequeues old values upon new enques

...T> : IReadOnlyCollection<T> { private readonly Queue<T> _queue = new Queue<T>(); private readonly object _lock = new object(); public int Count { get { lock (_lock) { return _queue.Count; } } } public int Limit { get; } public FixedSizedQueue(int limit) ...
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Multiple linear regression in Python

... sklearn.linear_model.LinearRegression will do it: from sklearn import linear_model clf = linear_model.LinearRegression() clf.fit([[getattr(t, 'x%d' % i) for i in range(1, 8)] for t in texts], [t.y for t in texts]) Then clf.coef_...
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Get current domain

... Try using this: $_SERVER['SERVER_NAME'] Or parse $_SERVER['REQUEST_URI'] apache_request_headers() share | improve this answer ...
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Unix's 'ls' sort by name

...in some cases (for instance, %foo will sort between bar and quux in LANG=en_US). If you want an ASCIIbetical sort, use LANG=C ls share | improve this answer | follow ...
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What's the deal with a leading underscore in PHP class methods?

...private with an underscore. In some older classes you'll see /**private*/ __foo() { to give it some extra weight. I've never heard of developers prefacing all their methods with underscores, so I can't begin to explain what causes that. ...
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Name node is in safe mode. Not able to leave

...o in the start-up phase. Read more here; hadoop.apache.org/docs/stable/hdfs_user_guide.html#Safemode – Amar Apr 4 '13 at 11:30 2 ...
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Using AES encryption in C#

...g System.IO; using System.Security.Cryptography; namespace RijndaelManaged_Example { class RijndaelExample { public static void Main() { try { string original = "Here is some data to encrypt!"; // Create a new instanc...
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How do I mock a service that returns promise in AngularJS Jasmine unit test?

...ce; beforeEach(module('app.myService')); beforeEach(inject( function(_myService_, myOtherService, $q){ myService = _myService_; spyOn(myOtherService, "makeRemoteCallReturningPromise").and.callFake(function() { var deferred = $q.defer(); deferred.resolve('Remote call res...
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How do I get an animated gif to work in WPF?

...e gif has 10 frames per second. class GifImage : Image { private bool _isInitialized; private GifBitmapDecoder _gifDecoder; private Int32Animation _animation; public int FrameIndex { get { return (int)GetValue(FrameIndexProperty); } set { SetValue(FrameIndexProp...
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Which is better in python, del or delattr?

.... del foo.bar compiles to two bytecode instructions: 2 0 LOAD_FAST 0 (foo) 3 DELETE_ATTR 0 (bar) whereas delattr(foo, "bar") takes five: 2 0 LOAD_GLOBAL 0 (delattr) 3 LOAD_FAST 0 (foo) ...