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Pandas aggregate count distinct
... @guy Try df.groupby('date').agg({'user_id': lambda s: s.unique().reset_index(drop=True)})
– BallpointBen
Aug 14 '18 at 19:01
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How to add item to the beginning of List?
...ert Method (Int32, T): Inserts an element into the List at the specified index.
var names = new List<string> { "John", "Anna", "Monica" };
names.Insert(0, "Micheal"); // Insert to the first element
share
...
Hidden features of HTML
...RL paths. So the reference #top would be resolved to “top” in the root index document and to “top” in the same document.
– Gumbo
Jun 6 '09 at 17:25
17
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How do I show the value of a #define at compile-time?
...? it seems has no "Stringification" feature as GCC infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0491c/…
– xdan
May 28 '13 at 7:07
2
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Python OpenCV2 (cv2) wrapper to get image size?
... There's no reason you have to be in love with colons in your index brackets. return (image.shape[1], image.shape[0]) is both succinct and readable.
– mcduffee
Mar 26 '17 at 14:14
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How to join components of a path when you are constructing a URL in Python
..._fields', '_make', '_replace', 'count', 'fragment', 'geturl', 'hostname', 'index', 'netloc', 'password', 'path', 'port', 'query', 'scheme', 'username']
>>> split[0]
'https'
>>> split = (split[:])
>>> type(split)
<type 'tuple'>
So in addition to the path joining whi...
LINQ equivalent of foreach for IEnumerable
... doesn't - the anonymous function taken by Linq functions can also take an index as a parameter, whereas with foreach you must rebuild the classic for (int i..) construct. And functional languages have to allow iteration that has side effects - otherwise you could never do one iota of work with t...
Hide options in a select list using jQuery
....getElementById('edit-field-service-sub-cat-value').options).each(function(index, option) {
if( option.value == title ) {
option.hidden = true; // not fully compatible. option.style.display = 'none'; would be an alternative or $(option).hide();
}
});
});
...
Date.getDay() javascript returns wrong day
...
I had a similar problem. date.getMonth() returns an index ranging from 0 to 11. January is 0. If you create a new date()-object and you want to get information about a costum date not the current one you have to decrease only the month by 1.
Like this:
function getDayName ()...
How to assign from a function which returns more than one value?
...s to the original vector if you would rather reference the letter than the index:
> names(r) <- c("a","b")
> names(r)
[1] "a" "b"
> r["a"]
a
1
[Edit] Given that you will be applying min and max to each vector separately, I would suggest either using a matrix (if a and b will be the ...