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Flattening a shallow list in Python [duplicate]
...n a list of iterables with a list comprehension, or failing that, what would you all consider to be the best way to flatten a shallow list like this, balancing performance and readability?
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How best to determine if an argument is not sent to the JavaScript function
I have now seen 2 methods for determining if an argument has been passed to a JavaScript function. I'm wondering if one method is better than the other or if one is just bad to use?
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Assignment in an if statement
I have a class Animal , and its subclass Dog .
I often find myself coding the following lines:
17 Answers
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Current time in microseconds in java
On a Unix system, is there a way to get a timestamp with microsecond level accuracy in Java? Something like C's gettimeofday function.
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sed command with -i option (in-place editing) works fine on Ubuntu but not Mac [duplicate]
I know nothing about Sed but need this command (which works fine on Ubuntu) to work on a Mac OSX:
4 Answers
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ALTER TABLE without locking the table?
When doing an ALTER TABLE statement in MySQL, the whole table is read-locked (allowing concurrent reads, but prohibiting concurrent writes) for the duration of the statement. If it's a big table, INSERT or UPDATE statements could be blocked for a looooong time. Is there a way to do a "hot alter", li...
Render HTML to PDF in Django site
For my django powered site, I am looking for an easy solution to convert dynamic html pages to pdf.
8 Answers
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When to use thread pool in C#? [closed]
I have been trying to learn multi-threaded programming in C# and I am confused about when it is best to use a thread pool vs. create my own threads. One book recommends using a thread pool for small tasks only (whatever that means), but I can't seem to find any real guidelines. What are some consid...
Fork and synchronize Google Code Subversion repository into GitHub
How can I fork and keep in sync with an Google Code Subversion repository that I don't have write access to, into a GitHub repository?
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How much faster is Redis than mongoDB?
It's widely mentioned that Redis is "Blazing Fast" and mongoDB is fast too. But, I'm having trouble finding actual numbers comparing the results of the two. Given similar configurations, features and operations (and maybe showing how the factor changes with different configurations and operations), ...