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How does C compute sin() and other math functions?
...at book, you can decide if you have a hardware adder, multiplier, divider, etc, and decide which operations are fastest. e.g. If you had a really fast divider, the fastest way to calculate sine might be P1(x)/P2(x) where P1, P2 are Chebyshev polynomials. Without the fast divider, it might be just P(...
Why does the order in which libraries are linked sometimes cause errors in GCC?
... libraries
$ export LD_LIBRARY_PATH=. # not needed if libs go to /usr/lib etc
$ g++ -fpic -shared d.cpp -o libd.so
$ g++ -fpic -shared b.cpp -L. -ld -o libb.so # specifies its dependency!
$ g++ -L. -lb a.cpp # wrong order (works on some distributions)
$ g++ -Wl,--as-needed -L. -lb a.cpp # wrong or...
Genymotion, “Unable to load VirtualBox engine.” on Mavericks. VBox is setup correctly
...
On Ubuntu GNU/Linux:
sudo /etc/init.d/vboxdrv setup
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How to use java.net.URLConnection to fire and handle HTTP requests?
...ie attributes which are irrelevant for the server side like expires, path, etc. Alternatively, you could also use cookie.substring(0, cookie.indexOf(';')) instead of split().
Streaming mode
The HttpURLConnection will by default buffer the entire request body before actually sending it, regardless o...
Case insensitive searching in Oracle
The default behaviour of LIKE and the other comparison operators, = etc is case-sensitive.
6 Answers
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Converting between datetime, Timestamp and datetime64
...4.
Think of np.datetime64 the same way you would about np.int8, np.int16, etc and apply the same methods to convert beetween Python objects such as int, datetime and corresponding numpy objects.
Your "nasty example" works correctly:
>>> from datetime import datetime
>>> import n...
Using PUT method in HTML form
... @DaBlick: But not for XMLHttpRequests? If so then relying on the fetch API should be more standardized.
– hakre
Jan 10 '19 at 14:37
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Why aren't python nested functions called closures?
...ariables to the inner function, modifying an object on the inner function, etc.
In Python 3, support is more explicit - and succinct:
def closure():
count = 0
def inner():
nonlocal count
count += 1
print(count)
return inner
Usage:
start = closure()
start() # ...
Rake just one migration
...r_migrations.rb'
=> ["YourMigrations"]
>> YourMigrations.up
=> etc... as the migration runs
>> YourMigration.down
More usefully this could be put into a rake task etc.
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CodeIgniter removing index.php from url
...:
Allow overriding htaccess in Apache Configuration (Command)
sudo nano /etc/apache2/apache2.conf
and edit the file & change to
AllowOverride All
for www folder
Step 4 :
Enabled apache mod rewrite (Command)
sudo a2enmod rewrite
Step 5 :
Restart Apache (Command)
sudo /etc/init.d/apa...