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Is gcc std::unordered_map implementation slow? If so - why?
We are developing a highly performance critical software in C++. There we need a concurrent hash map and implemented one. So we wrote a benchmark to figure out, how much slower our concurrent hash map is compared with std::unordered_map .
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Proper way to use **kwargs in Python
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You can pass a default value to get() for keys that are not in the dictionary:
self.val2 = kwargs.get('val2',"default value")
However, if you plan on using a particular argument with a particular default value, why not use named arguments in the first place?
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How do I read from parameters.yml in a controller in symfony2?
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The URL for documentation is now symfony.com/doc/2.7/components/dependency_injection/…
– SilvioQ
Jun 9 '15 at 18:45
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VIM Replace word with contents of paste buffer?
...ap to yank into register a, then put the contents of register a. Same goes for a change command. In this case, if you don't want the text you remove with the change command to go anywhere, you can use the black hole register "_: "_cw. Then once in insert mode, you can hit ctrl-R followed by the reg...
What does the exclamation mark mean in a Haskell declaration?
...lly, it means that it must be evaluated to what's called "weak head normal form" when the data structure value is created. Let's look at an example, so that we can see just what this means:
data Foo = Foo Int Int !Int !(Maybe Int)
f = Foo (2+2) (3+3) (4+4) (Just (5+5))
The function f above, when...
Can I extend a class using more than 1 class in PHP?
...ve several classes with functions that I need but want to store separately for organisation, can I extend a class to have both?
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Using Excel OleDb to get sheet names IN SHEET ORDER
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Can't find this in actual MSDN documentation, but a moderator in the forums said
I am afraid that OLEDB does not preserve the sheet order as they were in Excel
Excel Sheet Names in Sheet Order
Seems like this would be a common enough requirement that there would be a decent workaround....
RE error: illegal byte sequence on Mac OS X
I'm trying to replace a string in a Makefile on Mac OS X for cross-compiling to iOS. The string has embedded double quotes. The command is:
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How to copy from current position to the end of line in vi
...e it in another file opened in vi. I googled it but cant find any solution for this. Appreciate any help on this. Thank you.
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python design patterns [closed]
I am looking for any resources that gives examples of Best Practices, Design patterns and the SOLID principles using Python.
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