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How to remove non-alphanumeric characters?
... like you almost knew what you wanted to do already, you basically defined it as a regex.
preg_replace("/[^A-Za-z0-9 ]/", '', $string);
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Python: List vs Dict for look up table
...d
Lookups in lists are O(n), lookups in dictionaries are amortized O(1), with regard to the number of items in the data structure. If you don't need to associate values, use sets.
Memory
Both dictionaries and sets use hashing and they use much more memory than only for object storage. According t...
Find merge commit which include a specific commit
...ranch feature is still available.
In that case h is the last result of:
git log master ^feature --ancestry-path
If the branch feature is not available anymore, you can show the merge commits in the history line between c and master:
git log <SHA-1_for_c>..master --ancestry-path --merges...
Vertically centering Bootstrap modal window
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This does the job : http://jsfiddle.net/sRmLV/1140/
It uses a helper-div and some custom css. No javascript or jQuery required.
HTML (based on Bootstrap's demo-code)
<button class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">Launch demo modal<...
How to get file creation & modification date/times in Python?
...cumented at https://msdn.microsoft.com/en-us/library/14h5k7ff.aspx) stores its creation date. You can access this in Python through os.path.getctime() or the .st_ctime attribute of the result of a call to os.stat(). This won't work on Unix, where the ctime is the last time that the file's attributes...
Convert String to Type in C# [duplicate]
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You can only use just the name of the type (with its namespace, of course) if the type is in mscorlib or the calling assembly. Otherwise, you've got to include the assembly name as well:
Type type = Type.GetType("Namespace.MyClass, MyAssembly");
If the assembly is st...
Subprocess changing directory
...call a command named cd.
But cd is a shell internal. So you can only call it as
subprocess.call('cd ..', shell=True) # pointless code! See text below.
But it is pointless to do so. As no process can change another process's working directory (again, at least on a UNIX-like OS, but as well on Win...
Height of status bar in Android [duplicate]
What's the height of the status bar in Android? Is it always the same?
23 Answers
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Detect if the app was launched/opened from a push notification
Is it possible to know if the app was launched/opened from a push notification?
26 Answers
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What does the explicit keyword mean?
What does the explicit keyword mean in C++?
11 Answers
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