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In Ruby on Rails, what's the difference between DateTime, Timestamp, Time and Date?
..., getting dates/times right when programming is always fraught with danger and difficulity.
3 Answers
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Async/Await vs Threads
...b done. Ideally it doesn't use a thread at all, it posts a driver request and once the driver completes the data transfer it generates a completion notification callback. Networking is by far the most common usage, latencies of hundreds of milliseconds are common and an inevitable side-effect of s...
What to add for the update portion in ConcurrentDictionary AddOrUpdate
...f an update. I guess in your case (since you don't distinguish between add and update) this would be:
var sessionId = a.Session.SessionID.ToString();
userDic.AddOrUpdate(
authUser.UserId,
sessionId,
(key, oldValue) => sessionId);
I.e. the Func always returns the sessionId, so that both A...
Example for sync.WaitGroup correct?
...rrect? It gives the expected result, but I am unsure about the wg.Add(4) and the position of wg.Done() . Does it make sense to add the four goroutines at once with wg.Add() ?
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How do I get AWS_ACCESS_KEY_ID for Amazon?
...ited Dec 17 '15 at 0:20
New Alexandria
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answered Jan 29 '14 at 21:46
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Why is \r a newline for Vim?
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For me the point of confusion is that \r and \n mean different things when used is the search pattern and the replacement pattern.
– dlamblin
Dec 4 '12 at 17:09
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Using CMake with GNU Make: How can I see the exact commands?
I use CMake with GNU Make and would like to see all commands exactly (for example how the compiler is executed, all the flags etc.).
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Expand Python Search Path to Other Source
...ined a project with a rather large existing code base. We develop in linux and do not use and IDE. We run through the command line. I'm trying to figure out how to get python to search for the right path when I run project modules. For instance, when I run something like:
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Selectively revert or checkout changes to a file in Git?
Is there a command that allows you to partially undo the changes to a file (or files) in the working directory?
4 Answers
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How to loop through a HashMap in JSP?
...ctice. I recommend to install JSTL (just drop the JAR file in /WEB-INF/lib and declare the needed taglibs in top of JSP). It has a <c:forEach> tag which can iterate over among others Maps. Every iteration will give you a Map.Entry back which in turn has getKey() and getValue() methods.
Here's ...