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Python “raise from” usage
...and the message states that the exception was directly caused by. If you omit the from then no __cause__ is set, but the __context__ attribute may be set as well, and the traceback then shows the context as during handling something else happened.
Setting the __context__ happens if you used raise i...
std::vector performance regression when enabling C++11
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I can reproduce your results on my machine with those options you write in your post.
However, if I also enable link time optimization (I also pass the -flto flag to gcc 4.7.2), the results are identical:
(I am compiling your original code, with container.push_back(...
String concatenation vs. string substitution in Python
...ython, the where and when of using string concatenation versus string substitution eludes me. As the string concatenation has seen large boosts in performance, is this (becoming more) a stylistic decision rather than a practical one?
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How do you write tests for the argparse portion of a python module? [closed]
I have a Python module that uses the argparse library. How do I write tests for that section of the code base?
9 Answers
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Programmatically open new pages on Tabs
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You can't directly control this, because it's an option controlled by Internet Explorer users.
Opening pages using Window.open with a different window name will open in a new browser window like a popup, OR open in a new tab, if the user configured the browser to d...
How to assert output with nosetest/unittest in python?
I'm writing tests for a function like next one:
11 Answers
11
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How to get method parameter names?
...follow
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edited Sep 13 '19 at 15:08
Boris
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How do I convert between big-endian and little-endian values in C++?
How do I convert between big-endian and little-endian values in C++?
31 Answers
31
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Why does ReSharper tell me “implicitly captured closure”?
...s) => this.label1.Text = (g.Next() + i).ToString();
}
I get an "Implicitly captured closure: g" warning at the first lambda. It is telling me that g cannot be garbage collected as long as the first lambda is in use.
The compiler generates a class for both lambda expressions and puts all variab...
How to use filter, map, and reduce in Python 3
...ou can read about the changes in What's New In Python 3.0. You should read it thoroughly when you move from 2.x to 3.x since a lot has been changed.
The whole answer here are quotes from the documentation.
Views And Iterators Instead Of Lists
Some well-known APIs no longer return lists:
[...]
map(...