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How can building a heap be O(n) time complexity?
...t of the nodes we are calling siftDown from the bottom of the tree, we are now calling siftDown from the top of the tree on each iteration! Although the tree is shrinking, it doesn't shrink fast enough: The height of the tree stays constant until you have removed the first half of the nodes (when yo...
What are the differences between numpy arrays and matrices? Which one should I use?
...the calls to the dot function. But this argument will disappear in future, now that the @-operator is accepted for use with matrix multiplication, see PEP 465. This will need Python 3.5 and the latest version of Numpy. The matrix class might be deprecated in the far future, so better to use ndarray ...
C++ map access discards qualifiers (const)
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I would add that now in C11 you can use: std::map::at(key) and avoid the iterator.
– Juan Besa
Dec 19 '13 at 19:17
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Fastest sort of fixed length 6 int array
...ing, I'd put my money on insertion sort based on past experience.
Do you know anything about the input data? Some algorithms will perform better with certain kinds of data. For example, insertion sort performs better on sorted or almost-sorted dat, so it will be the better choice if there's an ab...
Docker - how can I copy a file from an image to a host?
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I don't know why this is not selected as the correct answer.
– CentAu
Apr 2 '19 at 16:14
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_csv.Error: field larger than field limit (131072)
...Try checking the limit again
csv.field_size_limit()
Out[22]: 100000000
Now you won't get the error "_csv.Error: field larger than field limit (131072)"
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How to change collation of database, table, column?
The database is latin1_general_ci now and I want to change collation to utf8mb4_general_ci .
19 Answers
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How to use pull to refresh in Swift?
... a PRETTY COOL feature that has been included since iOS 10, which is:
For now, UIRefreshControl is directly supported in each of UICollectionView, UITableView and UIScrollView!
Each one of these views have refreshControl instance property, which means that there is no longer a need to add it as a ...
Read environment variables in Node.js
...he top of your application entry file:
require('dotenv').config();
Done. Now you can access your environment variables with process.env.ENV_NAME.
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href image link download on click
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Thanks for your comment, it's a good thing to know. Although you need modernizr, I now use it in all my projects so... I'll accept your answer as the new answer
– Pierre
May 1 '13 at 12:05
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