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Why is it faster to check if dictionary contains the key, rather than catch the exception in case it
...y once instead of twice.
If you really want to just return null if the key doesn't exist, the above code can be simplified further:
obj item;
dict.TryGetValue(name, out item);
return item;
This works, because TryGetValue sets item to null if no key with name exists.
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A simple scenario using wait() and notify() in java
...ss.
By synchronizing on a shared object, you can ensure that this problem does not occur, as the second thread's take() call will not be able to make progress until the first thread has actually blocked.
Secondly, you need to put the condition you are checking in a while loop, rather than an if st...
What is the proper way to re-throw an exception in C#? [duplicate]
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Interesting, doesn't work for me. Stack trace is lost. No difference between throw ex or throw, same result.
– Craig
Jan 2 '14 at 18:59
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How can I parse a YAML file from a Linux shell script?
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Not sure what you're getting at, but if you mean this doesn't work for all YAML, you're right. That's why I opened with a few qualifications. I just shared what worked for my use case, since it answered the question better than any other at the time. This can definitely be expan...
Python - abs vs fabs
...f any benchmark, even if it internally tries to avoid the issues as timeit does.
– Peter Hansen
Jan 3 '13 at 2:11
1
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SQL how to increase or decrease one for a int column in one command
...bility to update the record rather than just replace it (as the second one does).
Keep in mind that for both to exist, there has to be a UNIQUE key defined...
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Detect if called through require or directly by command line
...way to get around this? I have code (which I don't have control over) that does this, but I need to require() it and have it act as though it was called directly. Basically, I need to fool something that uses that test into thinking it was called directly.
– Kevin
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delete_all vs destroy_all?
...t, just like dependent: :delete or dependent: :delete_all, this new option does not trigger the around/before/after_destroy callbacks of the dependent records.
However, it is possible to have dependent: :destroy associations anywhere within a chain of models that are otherwise associated with depend...
Callback of .animate() gets called twice jquery
...uing answer, but unfortunately it has unintended consequences. The promise doesn't just delay callback execution until the elements of the jQuery set have finished the current animation (which would be great). It is resolved only after all pending animations of the set are done. So if a second anima...
How to wait for several Futures?
...et"
// the 'actual' first to fail (usually...)
// and it returns early (it does not wait 1 sec)
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