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How do I execute a program from Python? os.system fails due to spaces in path
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subprocess.call will avoid problems with having to deal with quoting conventions of various shells. It accepts a list, rather than a string, so arguments are more easily delimited. i.e.
import subprocess
subprocess.call(['C:\\Temp\\a b c\\Notepad.exe', 'C:\\tes...
Grouping functions (tapply, by, aggregate) and the *apply family
...ing useRs may have difficulty deciding which one is appropriate for their situation or even remembering them all. They may have a general sense that "I should be using an *apply function here", but it can be tough to keep them all straight at first.
Despite the fact (noted in other answers) that mu...
Which, if any, C++ compilers do tail-recursion optimization?
It seems to me that it would work perfectly well to do tail-recursion optimization in both C and C++, yet while debugging I never seem to see a frame stack that indicates this optimization. That is kind of good, because the stack tells me how deep the recursion is. However, the optimization would be...
Is there common street addresses database design for all addresses of the world? [closed]
...which is the best and common database design for storing street addresses? It should be so simple to use, fast to query and dynamic to store all street addresses of the world which is identifying just by one id Thanks a lot
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getResourceAsStream() vs FileInputStream
...erent, but thus not C:\Tomcat\webapps\contextname or whatever you'd expect it to be. In a normal Eclipse project, that would be C:\Eclipse\workspace\projectname. You can learn about the current working directory the following way:
System.out.println(new File(".").getAbsolutePath());
However, the wo...
window.onload vs document.onload
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When do they fire?
window.onload
By default, it is fired when the entire page loads, including its content (images, CSS, scripts, etc.).
In some browsers it now takes over the role of document.onload and fires when the DOM is ready as well.
document.onload
It is ca...
Execution of Python code with -m option or not
...ommand-line flag, Python will import a module or package for you, then run it as a script. When you don't use the -m flag, the file you named is run as just a script.
The distinction is important when you try to run a package. There is a big difference between:
python foo/bar/baz.py
and
python -m f...
Calling the base constructor in C#
If I inherit from a base class and want to pass something from the constructor of the inherited class to the constructor of the base class, how do I do that?
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presentViewController and displaying navigation bar
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It is true that if you present a view controller modally on the iPhone, it will always be presented full screen no matter how you present it on the top view controller of a navigation controller or any other way around. But y...
Vim clear last search highlighting
...noh
Or turn off highlighting completely:
set nohlsearch
Or, to toggle it:
set hlsearch!
nnoremap <F3> :set hlsearch!<CR>
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