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Re-raise exception with a different type and message, preserving existing information
I'm writing a module and want to have a unified exception hierarchy for the exceptions that it can raise (e.g. inheriting from a FooError abstract class for all the foo module's specific exceptions). This allows users of the module to catch those particular exceptions and handle them distinctly,...
Go to back directory browsing after opening file in vim
...an go back to the last buffer using :b#.
If you just opened a file, then it will bring you just back to the directory browsing.
Update:
Since this answer happened to be accept as the correct answer and is thus on the top, I'd like to summarize a bit the answers, including the one by @romainl that...
If i synchronized two methods on the same class, can they run simultaneously?
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Both methods lock the same monitor. Therefore, you can't simultaneously execute them on the same object from different threads (one of the two methods will block until the other is finished).
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Truly understanding the difference between procedural and functional
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Functional Programming
Functional programming refers to the ability to treat functions as values.
Let's consider an analogy with "regular" values. We can take two integer values and combine them using the + operator to obtain a new integer. Or we can multiply an integer by a floating p...
Statistics: combinations in Python
...al.comb (scipy.misc.comb in older versions of scipy). When exact is False, it uses the gammaln function to obtain good precision without taking much time. In the exact case it returns an arbitrary-precision integer, which might take a long time to compute.
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Non-static variable cannot be referenced from a static context
I've written this test code:
12 Answers
12
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How does the NSAutoreleasePool autorelease pool work?
As I understand it, anything created with an alloc , new , or copy needs to be manually released. For example:
7 Answer...
How to check if a number is between two values?
...the browser to do something if the window size is greater than 500px. I do it like so:
7 Answers
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Delete last commit in bitbucket
I made a mistake and I don't know how to delete my latest push in the repository. I pull the latest updates of the app but it has conflicts and I push it to repository.
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The tilde operator in C
I've seen the tilde operator used in the ELF hashing algorithm, and I'm curious what it does. (The code is from Eternally Confused .)
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