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What does it mean for a data structure to be “intrusive”?
... used to describe data structures like lists and stacks, but what does it mean?
2 Answers
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Multiple aggregations of the same column using pandas GroupBy.agg()
...the functions as a list:
In [20]: df.groupby("dummy").agg({"returns": [np.mean, np.sum]})
Out[20]:
mean sum
dummy
1 0.036901 0.369012
or as a dictionary:
In [21]: df.groupby('dummy').agg({'returns':
{'Mean': np...
Programmatically Hide/Show Android Soft Keyboard [duplicate]
... The Scroll View however makes the keyboard appear only on first startup, meaning that if you lock the screen then come back, then it will no longer be triggered. As such, I used the following stackoverflow.com/a/29229865/2413303 in order to programmatically call the keyboard (with delay, because o...
Check if event is triggered by a human
...ry stores the original event object inside this property. Btw, what do you mean you don't know? You just provided the link to the documentation :)
– Šime Vidas
Jul 14 '11 at 11:41
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How to specify an area name in an action link?
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How does this look like translated into link? I mean - when form is rendered and returned to the client.
– FrenkyB
Jul 25 '17 at 6:28
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How to submit form on change of dropdown list?
...load of CSS to make it look like a true dropdown list. But then there's no means of a <select> anymore.
– BalusC
Oct 9 '13 at 18:51
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How do I find duplicates across multiple columns?
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Using count(*) over(partition by...) provides a simple and efficient means to locate unwanted repetition, whilst also list all affected rows and all wanted columns:
SELECT
t.*
FROM (
SELECT
s.*
, COUNT(*) OVER (PARTITION BY s.name, s.city) AS qty
FROM stuff s
) t
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Angular ng-repeat Error “Duplicates in a repeater are not allowed.”
...larjs/
AngularJS does not allow duplicates in a ng-repeat directive. This means if you are trying to do the following, you will get an error.
// This code throws the error "Duplicates in a repeater are not allowed.
// Repeater: row in [1,1,1] key: number:1"
<div ng-repeat="row in [1,1,1]">
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How do I create a URL shortener?
...d a inverse function g('abc') = 123 for your f(123) = 'abc' function. This means:
There must be no x1, x2 (with x1 ≠ x2) that will make f(x1) = f(x2),
and for every y you must be able to find an x so that f(x) = y.
How to convert the ID to a shortened URL
Think of an alphabet we want to use....
Generate GUID in MySQL for existing Data?
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Looks like a simple typo. Didn't you mean "...where columnId is null"?
UPDATE db.tablename
SET columnID = UUID()
where columnID is null
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