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How can I remove all objects but one from the workspace in R?
I have a workspace with lots of objects and I would like to remove all but one. Ideally I would like to avoid having to type rm(obj.1, obj.2... obj.n) . Is it possible to indicate remove all objects but these ones ?
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Trigger a button click with JavaScript on the Enter key in a text box
...one text input and one button (see below). How can I use JavaScript to trigger the button's click event when the Enter key is pressed inside the text box?
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Determine the path of the executing BASH script [duplicate]
...of Windows' %~dp0):
MY_PATH="`dirname \"$0\"`"
echo "$MY_PATH"
For the absolute, normalized path:
MY_PATH="`dirname \"$0\"`" # relative
MY_PATH="`( cd \"$MY_PATH\" && pwd )`" # absolutized and normalized
if [ -z "$MY_PATH" ] ; then
# error; for some reason, the path is no...
How to construct a relative path in Java from two absolute paths (or URLs)?
Given two absolute paths, e.g.
22 Answers
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Close file without quitting VIM application?
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This deletes the buffer (which translates to close the file)
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What are metaclasses in Python?
...e class of a class. A class defines how an instance of the class (i.e. an object) behaves while a metaclass defines how a class behaves. A class is an instance of a metaclass.
While in Python you can use arbitrary callables for metaclasses (like Jerub shows), the better approach is to make it an ac...
Converting Epoch time into the datetime
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Generate random numbers following a normal distribution in C/C++
How can I easily generate random numbers following a normal distribution in C or C++?
18 Answers
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How to print out the contents of a vector?
...har> path;
// ...
for (std::vector<char>::const_iterator i = path.begin(); i != path.end(); ++i)
std::cout << *i << ' ';
If you want to modify the vector's contents in the for loop, then use iterator rather than const_iterator.
But there's lots more that can be said about t...
Detect blocked popup in Chrome
I am aware of javascript techniques to detect whether a popup is blocked in other browsers (as described in the answer to this question ). Here's the basic test:
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