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What should every developer know about databases? [closed]
... forget it.
Disclaimer
The arguments are borrowed from the preface of my free eBook "Use The Index, Luke". I am spending quite a lot of my time explaining how indexes work and how to use them properly.
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Creating a daemon in Linux
... daemon cannot be started more than once. This must be implemented in race-free fashion so that the PID file is only updated when it is verified at the same time that the PID previously stored in the PID file no longer exists or belongs to a foreign process.
In the daemon process, drop privileges,...
Change one value based on another value in pandas
...t interested in your up-votes if you are going to take this position. Feel free to signal your point with a downvote, but I have already reflected on your point and disagree with it.
– ely
Oct 7 '13 at 16:02
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What is the __del__ method, How to call it?
...-destructors-in-python/ for a pro __del__ viewpoint. This is usually about freeing ctypes or some other special resource.
And my pesonal reason for not liking the __del__ function.
Everytime someone brings up __del__ it devolves into thirty messages of confusion.
It breaks these items in the Zen...
How to parse an RSS feed using JavaScript?
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If you are looking for a simple and free alternative to Google Feed API for your rss widget then rss2json.com could be a suitable solution for that.
You may try to see how it works on a sample code from the api documentation below:
google.load("feeds", "1"...
Convert JavaScript string in dot notation into an object reference
...ry metaprogramming specifically, and kind of violates function side-effect-free coding style, and will have performance hits). Novices who find themselves in this case, should instead consider working with array representations, e.g. ['x','a','b','c'], or even something more direct/simple/straightfo...
How do arrays in C# partially implement IList?
...ct. You cannot make it jive with what you read in the specs. Please feel free to see it your way, but you'll never come up with a good explanation why GetInterfaceMap() fails. "Something funky" is not much of an insight. I'm wearing implementation glasses: of course it fails, it is quack-like-a-...
Best approach for designing F# libraries for use from both F# and C#
...verly-complicated. You can write your entire library in F# and use it pain-free from F# and C# (I do it all the time).
Also, F# is more flexible than C# in terms of interoperability so it's generally best to follow traditional .NET style when this is a concern.
EDIT
The work required to make two ...
Using async/await for multiple tasks
... above code with WaitAll also blocks the threads and your threads won't be free to process any other work till the operation ends.
Recommended Approach
I would prefer WhenAll which will perform your operations asynchronously in Parallel.
public async Task DoWork() {
int[] ids = new[] { 1, 2...
How do I use reflection to call a generic method?
...nvoked delegates, but by using the dynamic type you get this behaviour for free.
If the generic method you want to call don't have an argument of a parametrized type (so its type parameter can't be inferred) then you can wrap the invocation of the generic method in a helper method like in the follo...