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Applicatives compose, monads don't
...s -> let nmnt = ns >>= (return . f) in ???
we get this far, but now our layers are all jumbled up. We have an n (m (n t)), so we need to get rid of the outer n. As Alexandre C says, we can do that if we have a suitable
swap :: n (m t) -> m (n t)
to permute the n inwards and join it ...
Cosmic Rays: what is the probability they will affect a program?
... the chip feature size for CPUs in 1995 was around 0.35 µm or 350nm. It's now 1/10th that size at 35nm.
– Joe Koberg
Apr 5 '10 at 21:02
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How to pull remote branch from somebody else's repo
...tHub for checking out the PR branch from another user's fork. You need to know the pull request ID (which GitHub displays along with the PR title).
Example:
Fixing your insecure code #8
alice wants to merge 1 commit into your_repo:master from her_repo:branch
git checkout -b <branch>
git pul...
Why does Java's Arrays.sort method use two different sorting algorithms for different types?
...g to Java 7 API docs cited in this answer, Arrays#Sort() for object arrays now uses TimSort, which is a hybrid of MergeSort and InsertionSort. On the other hand, Arrays#sort() for primitive arrays now uses Dual-Pivot QuickSort. These changes were implemented starting in Java SE 7.
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How can I set the max-width of a table cell using percentages?
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Actually max-width works in Safari and Chrome now. I am not sure how long it has been supported for.
– Jay
Aug 30 '19 at 6:36
add a comment
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What does glLoadIdentity() do in OpenGL?
... with all of the random functions that I have in my code. They work and I know when to use them, but I don't know why I need them or what they actually do.
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What does multicore assembly language look like?
...ling the gap in Nicholas' answer. Have marked yours as the accepted answer now.... gives the specific details I was interested in... although it would be better if there was a single answer that had your information and Nicholas' all combined.
– Paul Hollingsworth
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Django: How to completely uninstall a Django app?
...py makemigrations -n drop_all_tables my_app_to_remove
The directory looks now like this:
my_app_to_remove/
my_app_to_remove/__init__.py
my_app_to_remove/migrations
my_app_to_remove/migrations/0001_initial.py
my_app_to_remove/migrations/....
my_app_to_remove/migrations/0030_drop_all_tables.py
my_ap...
Pandas percentage of total with groupby
...r
19 s ± 77.1 ms per loop
(mean ± std. dev. of 7 runs, 1 loop each)
So now we see x10 speed up on large, high cardinality datasets.
Be sure to UV these three answers if you UV this one!!
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What's the difference between URI.escape and CGI.escape?
...es how data should be encoded/decode between web server and application.
Now, let's say that you need to escape a URI in your app. It is a more specific use case.
For that, the Ruby community used URI.escape for years. The problem with URI.escape was that it could not handle the RFC-3896 spec.
UR...