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count the frequency that a value occurs in a dataframe column
...columns you can use:
df.apply(pd.value_counts)
This will apply a column based aggregation function (in this case value_counts) to each of the columns.
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How to ignore xargs commands if stdin input is empty?
...SunOS sun4v
$ xargs -n1 echo blah < /dev/null
$ uname -is
Linux x86_64
$ xargs --version | head -1
xargs (GNU findutils) 4.7.0-git
$ xargs -n1 echo blah < /dev/null
blah
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Downcasting in Java
... this:
variable_of_type_B = (B)expression_of_type_A;
And as others have demonstrated, that sort of cast is perfectly legal. The expression on the right could very well evaluate to an object of type B. The compiler sees that A and B have a subtype relation, so with the "expression" view of the cod...
Conversion from Long to Double in Java
... Naman
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answered Sep 16 '10 at 8:23
YoKYoK
13.4k44 gold badges4444...
Jquery bind double click and single click separately
... $this.removeClass('clicked'); },500);
}//end of else
});
Demo goes here http://jsfiddle.net/cB484/
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Select text on input focus
...ike this:
<input type="text" value="test" select-on-click />
View demo
Update1: Removed jQuery dependency.
Update2: Restrict as attribute.
Update3: Works in mobile Safari. Allows selecting part of the text (requires IE>8).
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How does the Java 'for each' loop work?
...'re almost equivalent, but with collections, iterator wins.
*This post is based on two answers I wrote on Stack Overflow:
Uses and syntax for for-each loop in Java
Should I use an Iterator or a forloop to iterate?
Some more information: Which is more efficient, a for-each loop, or an iterator?
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How do you change the width and height of Twitter Bootstrap's tooltips?
...ia query to reset your tooltip to fit the smartphone view. Like this:
My demo HERE demonstrates the flexibility and responsiveness on the tooltips according to content size and device display size as well
@media (max-width: 320px) {
.tooltip-inner {
min-width: initial;
width...
Swift performSelector:withObject:afterDelay: is unavailable [duplicate]
...2
let dispatchTime: dispatch_time_t = dispatch_time(DISPATCH_TIME_NOW, Int64(0.1 * Double(NSEC_PER_SEC)))
dispatch_after(dispatchTime, dispatch_get_main_queue(), {
// your function here
})
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How do you manage your gists on GitHub? [closed]
...orts searching, editing and labels. Here's a screenshot:
There's also a demo video at: http://www.youtube.com/watch?v=VLgyY6lqpsQ
GistBox Clipper (a Chrome extension) also provides the ability to save <pre> tags and arbitrary text on any web page.
Edit:
Unfortunately, GistBox is bec...