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How to run code when a class is subclassed? [duplicate]
...bases, clsdict)
where in this case, name equals the string 'Superclass', and bases is the tuple (object, ). The clsdict is a dictionary of the class attributes defined in the body of the class definition.
Note the similarity to myclass = type(name, bases, clsdict).
So, just as you would use a cl...
SELECT DISTINCT on one column
....WHERE SKU LIKE 'FOO%') a WHERE a.RowNumber = 1
– Andre Nel
Jun 21 '17 at 11:46
This works although it's not a CTE ...
Two way/reverse map [duplicate]
...
You can create your own dictionary type by subclassing dict and adding the logic that you want. Here's a basic example:
class TwoWayDict(dict):
def __setitem__(self, key, value):
# Remove any previous connections with these values
if key in self:
del s...
What is the use of the square brackets [] in sql statements?
...s around column names in sql. Do the brackets offer any advantage? When I hand code T-SQL I've never bothered with them.
9 ...
How can a Javascript object refer to values in itself? [duplicate]
... In ES6 you can replace key2 : function() {...} with get key2() {...} and then you don't need to use brackets when calling it: alert(obj.key2);
– user993683
Dec 6 '16 at 5:54
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How do you append to a file in Python?
...ight think to forget it when the code has multiple exit points, exceptions and so on.
– Petter
Jun 13 '13 at 17:37
59
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Django Server Error: port is already in use
... error, but I have killed everything on the port.
– wanderer0810
Sep 8 '17 at 23:52
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Fixed size queue which automatically dequeues old values upon new enques
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I would write a wrapper class that on Enqueue would check the Count and then Dequeue when the count exceeds the limit.
public class FixedSizedQueue<T>
{
ConcurrentQueue<T> q = new ConcurrentQueue<T>();
private object lockObject = new object();
public int ...
Cartesian product of x and y array points into single array of 2D points
I have two numpy arrays that define the x and y axes of a grid. For example:
13 Answers
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A good book for learning D3.js [closed]
I saw D3.js and I was interested so I bought this book ! I may be wrong, however I found it un-fulfilling.
3 Answers
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