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Relationship between SciPy and NumPy
SciPy appears to provide most (but not all [1]) of NumPy's functions in its own namespace. In other words, if there's a function named numpy.foo , there's almost certainly a scipy.foo . Most of the time, the two appear to be exactly the same, oftentimes even pointing to the same function object.
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Difference between `data` and `newtype` in Haskell
...al constructor at runtime with newtype, this property doesn't hold.
That extra pointer in the Book to (,) constructor allows us to put a bottom value in.
As a result, newtype and data have slightly different strictness properties, as explained in the Haskell wiki article.
Unboxing
It doesn't ma...
Telling gcc directly to link a library statically
...itten, variant 2 -Wl,-Bstatic -llib2 -Wl,-Bdynamic is just long and adds 2 extra options and assumes default mode as Bdynamic, and accepted variant 3 -l:libXYZ.a is short and just works. All three will work for many cases, and variant 2 may not work when linking static programs. Actual linking step ...
Access denied for user 'root'@'localhost' while attempting to grant privileges. How do I grant privi
...gin: <------------------------------- new column in 5.5
authentication_string: <------------------------------- new column in 5.5
1 row in set (0.00 sec)
There are also new tables in 5.5, such as mysql.proxies_user: make sure you have them.
When installing a brand new mysql server instance...
Find and Replace text in the entire table using a MySQL query
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Does this replace an entire field, or with it do a substring match within a field?
– Randy Greencorn
Nov 14 '13 at 21:09
3
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How can I check if a directory exists in a Bash shell script?
...e variable, like if [ -d "${THING:+$THING/}" ]. A directory won't mind the extra slash. A file will evaluate to false. Empty will remain empty, so false. And a symlink will be resolved to its destination. Of course, it depends on your goal. If you want to go there, this is fine. If you want to delet...
How do I insert a linebreak where the cursor is without entering into insert mode in Vim?
...ink) the author requested. When I tested it, vi automatically removed the extra spaces for me; use 'x' to delete them if yours doesn't. And why do vi commands look like modem line noise? :-)
– Adam Liss
Oct 26 '08 at 3:51
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How to combine two or more querysets in a Django view?
...sets into a list is the simplest approach. If the database will be hit for all querysets anyway (e.g. because the result needs to be sorted), this won't add further cost.
from itertools import chain
result_list = list(chain(page_list, article_list, post_list))
Using itertools.chain is faster than...
Is there a simple, elegant way to define singletons? [duplicate]
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I don't really see the need, as a module with functions (and not a class) would serve well as a singleton. All its variables would be bound to the module, which could not be instantiated repeatedly anyway.
If you do wish to use a cla...
Trees in Twitter Bootstrap [closed]
...icons and badging into my take on a Bootstrap tree widget.
Example:
For extra credit, I've created a GitHub project to host the jQuery and LESS code that goes into adding this tree component to Bootstrap. Please see the project documentation at http://jhfrench.github.io/bootstrap-tree/docs/exampl...