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What is the difference between an annotated and unannotated tag?

...release without making a release commit. Lightweight tags don't have that extra information, and don't need it, since you are only going to use it yourself to develop. git push --follow-tags will only push annotated tags git describe without command line options only sees annotated tags Internals...
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Usage of __slots__?

...Unifying types and classes in Python 2.2 If you subclass a built-in type, extra space is automatically added to the instances to accomodate __dict__ and __weakrefs__. (The __dict__ is not initialized until you use it though, so you shouldn't worry about the space occupied by an empty dictionary for...
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Pimpl idiom vs Pure virtual class interface

... important. It's appropriate for it to be a key in a std::map. Example, a "string" class, or a "date" class, or a "complex number" class. To "copy" instances of such a class makes sense. An Entity type Identity is important. Always passed by reference, never by "value". Often, doesn't make sense t...
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Getting distance between two points based on latitude/longitude

...nit.MILES) >> 243.71201856934454 # in miles # you can also use the string abbreviation for units: haversine(lyon, paris, unit='mi') >> 243.71201856934454 # in miles haversine(lyon, paris, unit=Unit.NAUTICAL_MILES) >> 211.78037755311516 # in nautical miles They claim to have ...
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Performance difference for control structures 'for' and 'foreach' in C#

...date. I did a small test, just to see. Here is the code: static void Main(string[] args) { List<int> intList = new List<int>(); for (int i = 0; i < 10000000; i++) { intList.Add(i); } DateTime timeStarted = DateTime.Now; for (int i = 0; i < intList...
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Android ViewPager with bottom dots

... app:imageResources="@array/img_id_arr"/> Create an integer array in strings.xml e.g. <integer-array name="img_id_arr"> <item>@drawable/img1</item> <item>@drawable/img2</item> <item>@drawable/img3</item> <item>@drawable/img4</item&...
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What makes a keychain item unique (in iOS)?

...ivate keys. That's a lot different to Apple's sample code that only stores string credentials (username/password). However, I have found out that when you set the kSecClass to kSecClassCertificate or kSecClassKey the Keychain checks also if the entry (the value) is already stored. This prevents from...
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WatiN or Selenium? [closed]

... { IE _ie = null; object _lock = new object(); IE GetInstance(string UrlFragment) { lock (_lock) { if (_ie == null) { var instances = new IECollection(true); //Find all existing IE instances var match = instanc...
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google oauth2 redirect_uri with several parameters

... state=THE_STATE_PARAMETERS So for your case,do this: /1. create a json string of your parameters -> { "a" : "b" , "c" : 1 } /2. do a base64UrlEncode , to make it URL safe -> stateString = base64UrlEncode('{ "a" : "b" , "c" : 1 }'); This is a PHP example of base64UrlEncoding & de...
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How should I read a file line-by-line in Python?

...ndle when it collects the file object, therefore as long as you don't have extra references to the file object and you don't disable GC and you're not opening many files in quick succession, you're unlikely to get "too many files open" due to not closing the file. – Lie Ryan ...