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How to sort a dataFrame in python pandas by two or more columns?
... a , b and c , I want to sort the dataframe by column b in ascending order, and by column c in descending order, how do I do this?
...
Mapping a function on the values of a map in Clojure
...
I like it, but is there any reason for the arguments order (besides the question) ? I was expecting [f m] as in map for some reason.
– nha
Aug 21 '16 at 22:48
...
How to assign multiple classes to an HTML container? [closed]
...e classes that set different values for the same attributes. Is there some order of precedence for that?
– EternallyCurious
Jan 1 '14 at 15:22
6
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What is the difference between ndarray and array in numpy?
...an array using __new__:
If buffer is None, then only shape, dtype, and order are used.
If buffer is an object exposing the buffer interface, then all keywords are interpreted.
The example below gives a random array because we didn't assign buffer value:
np.ndarray(shape=(2,2), dtype=float...
What are the best practices for using a GUID as a primary key, specifically regarding performance?
... separate key - the primary (logical) key on the GUID, and the clustering (ordering) key on a separate INT IDENTITY(1,1) column.
As Kimberly Tripp - the Queen of Indexing - and others have stated a great many times - a GUID as the clustering key isn't optimal, since due to its randomness, it will ...
Populate a Razor Section From a Partial
...Builder sb = new StringBuilder();
foreach (var item in requiredScripts.OrderByDescending(i => i.Priority))
{
sb.AppendFormat("<script src=\"{0}\" type=\"text/javascript\"></script>\n", item.Path);
}
return new HtmlString(sb.ToString());
}
public class ResourceI...
Object comparison in JavaScript [duplicate]
...d DOM nodes inside:
JSON.stringify(obj1) === JSON.stringify(obj2)
The ORDER of the properties IS IMPORTANT, so this method will return false for following objects:
x = {a: 1, b: 2};
y = {b: 2, a: 1};
2) Slow and more generic.
Compares objects without digging into prototypes, then compar...
What is the difference between LL and LR parsing?
...ponds to Reverse Polish Notation. The difference between PN and RPN is the order of traversing the binary tree of the equation:
+ 1 * 2 3 // Polish (prefix) expression; pre-order traversal.
1 2 3 * + // Reverse Polish (postfix) expression; post-order traversal.
According to Haberman, this ill...
What is the difference between exit() and abort()?
...or atexit says: "Functions [registered using atexit] are called in reverse order; no arguments are passed."
– strager
Dec 29 '08 at 3:55
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Exposing database IDs - security risk?
... They are everywhere. Many shoppingsites use a sequential number for the order id. Place one order at one date, and one at another date and you know how many orders they got during that period. Even if you don't know how much money the orders are worth, you still get an indication of how the well ...