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Open document with default OS application in Python, both in Windows and Mac OS
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except OSError, e:
print >>sys.stderr, "Execution failed:", e
Now, what are the advantages of using subprocess?
Security: In theory, this is more secure, but in fact we're needing to execute a command line one way or the other; in either environment, we need the environment and servic...
What's valid and what's not in a URI query?
...where spaces will get url-form-encoded to +. Works great, as longs as you know the values in the list contain no spaces (something numbers tend not to).
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switch / pattern matching idea
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I know it's an old topic, but in c# 7 you can do :
switch(shape)
{
case Circle c:
WriteLine($"circle with radius {c.Radius}");
break;
case Rectangle s when (s.Length == s.Height):
WriteLine($"{s...
What does the “at” (@) symbol do in Python?
...which used the @ symbol, but I have no idea what it does. I also do not know what to search for as searching Python docs or Google does not return relevant results when the @ symbol is included.
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How do I modify fields inside the new PostgreSQL JSON datatype?
...LANGUAGE sql IMMUTABLE STRICT
COST 100;
Update: functions are compacted now.
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Use of 'const' for function parameters
...mation. You provide the parameter by value so the caller does not need to know anything on what you do (internally) with it. So write class Foo { int multiply(int a, int b) const; } in your header. In your implementation you do care that you can promise not to alter a and b so int Foo::multiply(cons...
When do Java generics require
... a match that the compiler works out to Matcher<ArrayList<T>>. Now if it wasn't a type parameter, things would be fine, because List and ArrayList are covariant, but since Generics, as far as the compiler is concerned require ArrayList, it can't tolerate a List for reasons that I hope ar...
What's the cleanest way of applying map() to a dictionary in Swift?
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No need for temp var and reduce is now a method in Swift 2.0: let newDict = oldDict.reduce([String:Int]()) { (var dict, pair) in dict["new\(pair.1)"] = pair.1; return dict }
– Zmey
Jul 23 '15 at 15:48
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XPath contains(text(),'some string') doesn't work when used with node with more than one Text subnod
... I've edited my answer to provide a long explanation. I don't really know that much about XPath myself -- I just experimented a bit until I stumbled on that combination. Once I had a working combination, I made a guess what was going on and looked in the XPath standard to confirm what I thought...
How to view the contents of an Android APK file?
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It's shipped with Android Studio now.
Just go to Build/Analyze APK... then select your APK :)
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