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Android NDK C++ JNI (no implementation found for native…)

... There are a couple of things that can lead to "no implementation found". One is getting the function prototype name wrong, another is failing to load the .so at all. Are you sure that System.loadLibrary() is being called before the method is used? If you don't have a JNI_OnLoad function defined,...
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When is -XAllowAmbiguousTypes appropriate?

... So, why does GHC complain about the fi in your type signature but not the one for sugarSym? The documentation you have linked to explains that a type is ambiguous if it doesn't appear to the right of the constraint, unless the constraint is using functional dependencies to infer the otherwise-ambig...
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What is java interface equivalent in Ruby?

...o members at all: just take a look at java.io.Serializable and java.lang.Cloneable; those two interfaces mean very different things, yet they have the exact same signature. So, if two interfaces that mean different things, have the same signature, what exactly is the interface even guaranteeing you?...
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Evenly space multiple views within a container view

...e extra top/bottom space constraints on your labels to superview; just the ones to the 'space views'. This will be satisfiable since the top and bottom constraints are on 'Space View 1' and 'Spacer View 4' respectively. Duh 1: I duplicated my view and merely put it in landscape mode so you could se...
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Create code first, many to many, with additional fields in association table

...join table with additional properties you will have to create actually two one-to-many relationships. It could look like this: public class Member { public int MemberID { get; set; } public string FirstName { get; set; } public string LastName { get; set; } public virtual ICollect...
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Combining multiple git repositories

...figures | |_(your figures...) |_thesis |_(your thesis...) One nice side to this procedure is that it will leave non-versioned files and directories in place. Hope this helps. Just one word of warning though: if your code directory already has a code subdirectory or file, things ...
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Just what is an IntPtr exactly?

...epresents a physical location in memory. A null pointer is (almost always) one that points to 0, and is widely recognized as "not pointing to anything". Since systems have different amounts of supported memory, it doesn't always take the same number of bytes to hold that number, so we call a "native...
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How to make MySQL handle UTF-8 properly

One of the responses to a question I asked yesterday suggested that I should make sure my database can handle UTF-8 characters correctly. How I can do this with MySQL? ...
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GitHub: How to make a fork of public repository private?

...e between the public repo and the fork. Here is the full workflow (we've done this before open sourcing React Native): First, duplicate the repo as others said (details here): Create a new repo (let's call it private-repo) via the Github UI. Then: git clone --bare https://github.com/exampleuse...
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python dataframe pandas drop column using int

...s given here so far will remove all of the columns, which may not be what one is looking for. This may be the case if one is trying to remove duplicate columns except one instance. The example below clarifies this situation: # make a df with duplicate columns 'x' df = pd.DataFrame({'x': range(5) ,...