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UIPanGestureRecognizer - Only vertical or horizontal
...tyInView:someView];
return fabs(velocity.y) > fabs(velocity.x);
}
And for Swift:
func gestureRecognizerShouldBegin(_ gestureRecognizer: UIPanGestureRecognizer) -> Bool {
let velocity = gestureRecognizer.velocity(in: someView)
return abs(velocity.x) > abs(velocity.y)
}
...
Python pandas: fill a dataframe row by row
...sign a dictionary
to each element of the row y probably not what you want; converting to a Series tells pandas
that you want to align the input (for example you then don't have to to specify all of the elements)
In [7]: df = pandas.DataFrame(columns=['a','b','c','d'], index=['x','y','z'])
In [8]: ...
Query to list number of records in each table in a database
...
If you're using SQL Server 2005 and up, you can also use this:
SELECT
t.NAME AS TableName,
i.name as indexName,
p.[Rows],
sum(a.total_pages) as TotalPages,
sum(a.used_pages) as UsedPages,
sum(a.data_pages) as DataPages,
(sum(...
What is the difference between a weak reference and an unowned reference?
...
Both weak and unowned references do not create a strong hold on the referred object (a.k.a. they don't increase the retain count in order to prevent ARC from deallocating the referred object).
But why two keywords? This distinction has...
How to create our own Listener interface in android?
...od in MyButton class : void setMyListener(MyListner m1){ this.ml = m1;} and then use this method any time to set your listener object.
– Rakesh Soni
Dec 7 '15 at 10:22
...
Numpy matrix to array
...
This will convert the matrix into array
A = np.ravel(M).T
share
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Generating a SHA-256 hash from the Linux command line
...047dd39466b3c8974e592c2fa383d4a3960714caef0c4f2 using
http://hash.online-convert.com/sha256-generator
7 Answers
...
Is it intended by the C++ standards committee that in C++11 unordered_map destroys what it inserts?
...behaviour occurs in very recent compilers only: I found that clang 3.2-3.4 and GCC 4.8 are the only compilers to demonstrate this "feature".
...
Why is the order in dictionaries and sets arbitrary?
I don't understand how looping over a dictionary or set in python is done by 'arbitrary' order.
6 Answers
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Is there a Python function to determine which quarter of the year a date is in?
...ed to count from 1 instead;-).
Originally two answers, multiply upvoted and even originally accepted (both currently deleted), were buggy -- not doing the -1 before the division, and dividing by 4 instead of 3. Since .month goes 1 to 12, it's easy to check for yourself what formula is right:
fo...