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How to convert a JSON string to a Map with Jackson JSON
..., from many years ago, seems to be helpful and is still getting upvotes, I now use the GSON library from Google, which I find to be more intuitive.
I've got the following code:
public void testJackson() throws IOException {
ObjectMapper mapper = new ObjectMapper();
File from = new File("a...
Why does C++ need a separate header file?
...against don't even need to have been written yet, never mind the compiler knowing what .cpp file they'll be in. Everything the calling code needs to know at compile time is expressed in the function declaration. At link time you will provide a list of .o files, or static or dynamic libraries, and th...
Using Phonegap for Native Application development [closed]
...rom Android to Iphone with some effort. Before I plunge into it I want to know what is forum's experience with Phonegap. What are the pain points and is it really scalable for enterprise level application development.
...
How does the new automatic reference counting mechanism work?
Can someone briefly explain to me how ARC works? I know it's different from Garbage Collection, but I was just wondering exactly how it worked.
...
What is the meaning of the term arena in relation to memory?
...e techniques is very specialized and generally only comes in handy if you know exactly what you're doing and why the normal library allocation is not good enough. Note that a good memory allocator will already do lots of magic itself, and you need a decent amount of evidence that that's not good eno...
What is the use of interface constants?
...he constant interface is not part of the exported API module or when it is nowhere implemented, I don't see the problem. Using const final classes is ugly: you need a private constructor which clutters the code as it has no use.
– Lawrence
Sep 28 '18 at 11:08
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Difference between attr_accessor and attr_accessible
...ode to (quickly) create setter and getter methods in a Class. That's all.
Now, what is missing as an explanation is that when you create somehow a link between a (Rails) model with a database table, you NEVER, NEVER, NEVER need attr_accessor in your model to create setters and getters in order to b...
What is java interface equivalent in Ruby?
...ple: where in java.util.Set<E> does it actually say that it is, you know, a set? Nowhere! Or more precisely, in the documentation. In English.
In pretty much all cases of interfaces, both from Java and .NET, all the relevant information is actually in the docs, not in the types. So, if the typ...
Applicatives compose, monads don't
...s -> let nmnt = ns >>= (return . f) in ???
we get this far, but now our layers are all jumbled up. We have an n (m (n t)), so we need to get rid of the outer n. As Alexandre C says, we can do that if we have a suitable
swap :: n (m t) -> m (n t)
to permute the n inwards and join it ...
How to make layout with rounded corners..?
...ith no padding)
The ImageView (including anything else in the layout) will now be clipped to the outer layout's rounded shape.
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