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Why doesn't a python dict.update() return the object?
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Python's mostly implementing a pragmatically tinged flavor of command-query separation: mutators return None (with pragmatically induced exceptions such as pop;-) so they can't possibly be confused with accessors (and in the same vein, assignment is not an expression, the statement-expressi...
How do I close all open tabs at once?
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Shortest/simplest/fastest way would be:
:qa
To save work in all tabs and quit:
:wqa
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How to listen for a WebView finishing loading a URL?
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Extend WebViewClient and call onPageFinished() as follows:
mWebView.setWebViewClient(new WebViewClient() {
public void onPageFinished(WebView view, String url) {
// do your stuff here
}
});
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Check if directory mounted with bash
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Running the mount command without arguments will tell you the current mounts. From a shell script, you can check for the mount point with grep and an if-statement:
if mount | grep /mnt/md0 > /dev/null; then
echo "yay"
else
echo "nay"
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The $.param( ) inverse function in JavaScript / jQuery
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You should use jQuery BBQ's deparam function. It's well-tested and documented.
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How to make an immutable object in Python?
...butes can be accessed via [0] etc., but at least it's considerably shorter and provides the additional advantage of being compatible with pickle and copy.
namedtuple creates a type similar to what I described in this answer, i.e. derived from tuple and using __slots__. It is available in Python 2....
Run javascript function when user finishes typing instead of on key up?
...ds. So with that in mind, lets start a timer when the user releases a key and clear it when they press one. I decided the input in question will be #myInput.
Making a few assumptions...
//setup before functions
var typingTimer; //timer identifier
var doneTypingInterval = 5000; //...
Drop rows with all zeros in pandas data frame
I can use pandas dropna() functionality to remove rows with some or all columns set as NA 's. Is there an equivalent function for dropping rows with all columns having value 0?
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Changing .gitconfig location on Windows
By default on Windows Git places global .gitconfig in c:\documents and settings\user\
13 Answers
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How to capture no file for fs.readFileSync()?
...ver there is no comment for the readFileSync() function regarding error handling. As such, if I try to use readFileSync() when there is no file, I get the error Error: ENOENT, no such file or directory .
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