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Why is Java's SimpleDateFormat not thread-safe? [duplicate]
...ed by operations on DateFormat / SimpleDateFormat.
For example parse(..) calls calendar.clear() initially and then calendar.add(..). If another thread invokes parse(..) before the completion of the first invocation, it will clear the calendar, but the other invocation will expect it to be populated...
How do I call ::std::make_shared on a class with only protected or private constructors?
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Actually, I am a huge fan of those meaningless structures used only as keys. I prefer this to Luc's solution, but that might be my biais against inheritance.
– Matthieu M.
Nov 16 '11 at 7:43...
How safe is it to store sessions with Redis?
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Redis is perfect for storing sessions. All operations are performed in memory, and so reads and writes will be fast.
The second aspect is persistence of session state. Redis gives you a lot of flexibility in how you want to persist session state to your hard-dis...
The entity cannot be constructed in a LINQ to Entities query
There is an entity type called Product that is generated by entity framework.
I have written this query
14 Answers
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How do I get the MAX row with a GROUP BY in LINQ query?
... (s => s.uid, tv => tv.uid, asdf => asdf.uid). Linq will automatically recognize it as selecting over elements of type Serial.
– Michael
Mar 17 '11 at 17:03
add a com...
Undo a Git merge that hasn't been pushed yet
Within my master branch, I did a git merge some-other-branch locally, but never pushed the changes to origin master. I didn't mean to merge, so I'd like to undo it. When doing a git status after my merge, I was getting this message:
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What does “DAMP not DRY” mean when talking about unit tests?
...ues or setup code. However, unlike production code, this duplication is usually isolated only to the scenarios within a single test fixture/file. Because of this, the duplication is minimal and obvious, which means it poses less risk to the project than other types of duplication.
Furthermore, remo...
What is the “reactor” in Maven?
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The reactor is the part of Maven that allows it to execute a goal on a set of modules. As mentioned in the Maven 1.x documentation on multi-modules builds (the reactor concept was already there in Maven 1.x), while modules are discrete unit of work, they can be g...
Enforcing the type of the indexed members of a Typescript object?
...ore a mapping of string -> string in a Typescript object, and enforce that all of the keys map to strings. For example:
8 ...
Why is Cache-Control attribute sent in request header (client to server)?
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Cache-Control: no-cache is generally used in a request header (sent from web browser to server) to force validation of the resource in the intermediate proxies.
If the client doesn't send this request to the server, intermediate proxies will return a copy o...