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How to access the ith column of a NumPy multidimensional array?
... reference is reflected in the original array.
– harmands
Oct 18 '16 at 14:21
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iphone Core Data Unresolved error while saving
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It means there's a mandatory property has been assigned nil. Either in your *.xcodatamodel check the "optional" box or when you are saving to the managedObjectContext make sure that your properties are filled in.
If you're getting further erro...
Removing item from vector, while in C++11 range 'for' loop?
I have a vector of IInventory*, and I am looping through the list using C++11 range for, to do stuff with each one.
12 Answ...
Getting the PublicKeyToken of .Net assemblies
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Open a command prompt and type one of the following lines according to your Visual Studio version and Operating System Architecture :
VS 2008 on 32bit Windows :
"%ProgramFiles%\Microsoft SDKs\Windows\v6.0A\bin\sn.exe" -T <assemblyn...
Path.Combine for URLs?
Path.Combine is handy, but is there a similar function in the .NET framework for URLs ?
40 Answers
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Is there a method that works like start fragment for result?
...app, each of the steps I want to show in the overlay are their own screens and activities. There are 3 parts of the sign-in process and each had their own activity that was called with startActivityForResult().
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Java 8 Distinct by property
... returns a predicate that maintains state about what it's seen previously, and that returns whether the given element was seen for the first time:
public static <T> Predicate<T> distinctByKey(Function<? super T, ?> keyExtractor) {
Set<Object> seen = ConcurrentHashMap.new...
How do I make a request using HTTP basic authentication with PHP curl?
I'm building a REST web service client in PHP and at the moment I'm using curl to make requests to the service.
11 Answers
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Why does Path.Combine not properly concatenate filenames that start with Path.DirectorySeparatorChar
... see that it calls CombineNoChecks, which then calls IsPathRooted on path2 and returns that path if so:
public static String Combine(String path1, String path2) {
if (path1==null || path2==null)
throw new ArgumentNullException((path1==null) ? "path1" : "path2");
Contract.EndContract...
Postgres: INSERT if does not exist already
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Postgres 9.5 (released since 2016-01-07) offers an "upsert" command, also known as an ON CONFLICT clause to INSERT:
INSERT ... ON CONFLICT DO NOTHING/UPDATE
It solves many of the subtle problems you can run into when using concurrent operation, which some other answers propose.
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