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What is the use of static constructors?

...ment; static string urlFragment = "foo/bar"; } Your fullUrl value is now just "http://www.example.com/" since urlFragment hadn't been initialized at the time fullUrl was being set. Not good. So, you add a static constructor to take care of the initialization: class ScopeMonitor { static...
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Require either of two arguments using argparse

... HEy @ijoseph, this answer is prett old by now. I'm not sure what the answer was any more. It probably has been removed by now. Sorry for that! – jlengrand Apr 13 '18 at 9:13 ...
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htaccess redirect to https://www

...ll catch it. RewriteRule .* https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301] # Now, rewrite any request to the wrong domain to use www. # [NC] is a case-insensitive match RewriteCond %{HTTP_HOST} !^www\. [NC] RewriteRule .* https://www.%{HTTP_HOST}%{REQUEST_URI} [L,R=301] About proxying When behind s...
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How can I represent an 'Enum' in Python?

... The original PEP354 is no longer merely rejected, but is now marked superseded. PEP435 adds a standard Enum for Python 3.4. See python.org/dev/peps/pep-0435 – Peter Hansen May 10 '13 at 19:05 ...
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iOS 5 Best Practice (Release/retain?)

...per-file basis. See pixelfreak's answer. So, my advice still stands, but now the 3rd-party libraries shouldn't need to be updated to work with ARC. Here's what Apple says about opting out of ARC for specific files: When you migrate a project to use ARC, the -fobjc-arc compiler flag is set a...
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What is stability in sorting algorithms and why is it important?

...vince yourself of that. (by the way, that algorithm is called radix sort) Now to answer your question, suppose we have a list of first and last names. We are asked to sort "by last name, then by first". We could first sort (stable or unstable) by the first name, then stable sort by the last name....
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How to refresh Android listview?

... was keeping the array in memory for certain feature reasons. To fix it I now call adapter.clear(), and adapter.addAll(Array<T>) before calling notifyDataSetChanged() – Michael DePhillips Feb 26 '14 at 23:09 ...
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C# operator overload for `+=`?

...ist, which are compiled in a special method calls, and CLR itself doesn't know anything about operators. So let's see what exactly stays behind the + and += operators. See this simple code: Decimal d = 10M; d = d + 10M; Console.WriteLine(d); Let view the IL-code for this instructions: IL_0000...
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Java maximum memory on Windows XP

...n't rebase those libraries, so they are still a problem for us. We know how to make chunked heaps, but there would be some overhead to using them. We have more requests for faster storage management than we do for larger heaps in the 32-bit JVM. If you really want large heaps, switc...
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How to 'insert if not exists' in MySQL?

...EY (`ensembl_transcript_id`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1; Now imagine that we have an automatic pipeline importing transcripts meta-data from Ensembl, and that due to various reasons the pipeline might be broken at any step of execution. Thus, we need to ensure two things: ...