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How do I convert Long to byte[] and back in java
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public byte[] longToBytes(long x) {
ByteBuffer buffer = ByteBuffer.allocate(Long.BYTES);
buffer.putLong(x);
return buffer.array();
}
public long bytesToLong(byte[] bytes) {
ByteBuffer buffer = ByteBuffer.allocate(Long.BYTES);
buffer.put(bytes);
buffer.flip();//need flip ...
Are inline virtual functions really a non-sense?
... excerpt from the excellent C++ faq:
"The only time an inline virtual call
can be inlined is when the compiler
knows the "exact class" of the object
which is the target of the virtual
function call. This can happen only
when the compiler has an actual object
rather than a pointer or ...
Unable to Cast from Parent Class to Child Class
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Well, I would hesitate to call this a "downcast".
– Kirk Woll
Dec 24 '12 at 4:43
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How do you tell the Visual Studio project type from an existing Visual Studio project
...o find if you clicked on the folder or the project) -> Properties.
Then all information is available for the project.
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How can I test https connections with Django as easily as I can non-https connections using 'runserv
...ifying middleman between your browser and the development server. Stunnel allows you to set up a lightweight server on your machine that accepts connections on a configured port, wraps them with SSL, and passes them along to some other server. We'll use this to open a stunnel port (8443) and pass ...
400 BAD request HTTP error code meaning?
... the rules.
In the case of a REST API with a JSON payload, 400's are typically, and correctly I would say, used to indicate that the JSON is invalid in some way according to the API specification for the service.
By that logic, both the scenarios you provided should be 400's.
Imagine instead this...
await vs Task.Wait - Deadlock?
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Wait and await - while similar conceptually - are actually completely different.
Wait will synchronously block until the task completes. So the current thread is literally blocked waiting for the task to complete. As a general rule, you should use "async all the ...
Difference between a Seq and a List in Scala
...tional programming. However, it has limitations and it's inadequate for parallel programming. These days, Vector is a better choice than List, but habit is hard to break.
Seq is a good generalization for sequences, so if you program to interfaces, you should use that. Note that there are actually t...
INNER JOIN ON vs WHERE clause
For simplicity, assume all relevant fields are NOT NULL .
11 Answers
11
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C# How can I check if a URL exists/is valid?
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FWIW - Not sure if that really solves the problem (other than perhaps different behavior client side) since you are simply changing the HTTP method. The response from the server will depend heavily on how the logic is coded and may not work well for a...