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How could I use requests in asyncio?
I want to do parallel http request tasks in asyncio , but I find that python-requests would block the event loop of asyncio . I've found aiohttp but it couldn't provide the service of http request using a http proxy.
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What does Serializable mean?
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Serialization is persisting an object from memory to a sequence of bits, for instance for saving onto the disk. Deserialization is the opposite - reading data from the disk to hydrate/create an object.
In the context of your question,...
How to safely open/close files in python 2.4
... f.close()
This ensures that even if # do stuff with f raises an exception, f will still be closed properly.
Note that open should appear outside of the try. If open itself raises an exception, the file wasn't opened and does not need to be closed. Also, if open raises an exception its result i...
Turning Sonar off for certain code
... mechanism though, which consists in adding the @SuppressFBWarnings annotation:
@edu.umd.cs.findbugs.annotations.SuppressFBWarnings(
value = "NAME_OF_THE_FINDBUGS_RULE_TO_IGNORE",
justification = "Why you choose to ignore it")
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Convert JsonNode into POJO
...lass);
where jsonObjectMapper is a Jackson ObjectMapper.
In older versions of Jackson, it would be
MyClass newJsonNode = jsonObjectMapper.readValue(someJsonNode, MyClass.class);
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How to evaluate a math expression given in string form?
I'm trying to write a Java routine to evaluate math expressions from String values like:
25 Answers
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Correct use of flush() in JPA/Hibernate
I was gathering information about the flush() method, but I'm not quite clear when to use it and how to use it correctly. From what I read, my understanding is that the contents of the persistence context will be synchronized with the database, i. e. issuing outstanding statements or refreshing enti...
How to drive C#, C++ or Java compiler to compute 1+2+3+…+1000 at compile time?
In a recent interview, I was asked a really strange question. The interviewer asked me how can I compute 1+2+3+...+1000 just using compiler features. This means that I am not allowed to write a program and execute it, but I should just write a program that could drive the compiler to compute this su...
Is there a command for formatting HTML in the Atom editor?
I would like to format my HTML with a command, as I do in Visual Studio, using Ctrl + K + D . Is this possible in Atom ? If not, are there other options?
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How can I make setInterval also work when a tab is inactive in Chrome?
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On most browsers inactive tabs have low priority execution and this can affect JavaScript timers.
If the values of your transition were calculated using real time elapsed between frames instead fixed increments on each interval, you not only workaround this issue bu...