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Good examples of Not a Functor/Functor/Applicative/Monad?
...ature of <*> cannot be implemented: data F a = Either (Int -> a) (String -> a).
A functor that is not lawful applicative even though the type class methods can be implemented:
data P a = P ((a -> Int) -> Maybe a)
The type constructor P is a functor because it uses a only in cov...
RESTful Authentication
...as the signing token. Signing should occur before URL encoding the
query string.
This technique is perhaps the more compatible with a Stateless architecture, and can also be implemented with a light session management (using in-memory sessions instead of DB persistence).
For instance, here is a...
How does Bluebird's util.toFastProperties function make an object's properties “fast”?
...y well. The nice thing is that when eval is passed something that is not a string it doesn't do anything with it so it's rather harmless - kind of like if(false){ debugger; }
– Benjamin Gruenbaum
Jul 28 '14 at 15:27
...
PHP Function Comments
... * Potential values are 'good', 'fair', 'poor' and 'unknown'.
* @var string $foo
*/
public $foo = 'unknown';
/**
* The status of life
* Note that names of private properties or methods must be
* preceeded by an underscore.
* @var bool $_good
*/
privat...
Using multiple delimiters in awk
...ors, with | : ex: awk -F 'this|that|[=/]' '......' (usefull to have words/strings separating things) (note that this keeps the spaces in the fiels between 2 separators. Adding also |[ \t]+ can be useful, but can make things tricky ... as there are often spaces before and after 'this', this will ma...
File to byte[] in Java
...
Thanks :) I also needed this one: String text = new String(Files.readAllBytes(new File("/path/to/file").toPath())); which is originally from stackoverflow.com/a/26888713/1257959
– cgl
Jan 8 '16 at 20:25
...
How to import multiple .csv files at once?
...t;-
list.files(pattern = "*.csv") %>%
map_df(~fread(.))
The stringsAsFactors = FALSE argument keeps the dataframe factor free, (and as marbel points out, is the default setting for fread)
If the typecasting is being cheeky, you can force all the columns to be as characters with the c...
What do single quotes do in C++ when used on multiple characters?
...
It's a multi-character literal. 1952805748 is 0x74657374, which decomposes as
0x74 -> 't'
0x65 -> 'e'
0x73 -> 's'
0x74 -> 't'
Edit:
C++ standard, §2.14.3/1 - Character literals
(...) An ordinary character literal that conta...
Git Blame Commit Statistics
...
git summary provided by the git-extras package is exactly what you need. Checkout the documentation at git-extras - git-summary:
git summary --line
Gives output that looks like this:
project : TestProject
lines : 13397
authors :
8927 John Doe ...
How do I filter query objects by date range in Django?
...n think of is as suggested in my original response, which is to supply the extra 'padding' for comparison against a datetime model field when you're filtering against a date instance. This can be done via the datetime.combine method as above, but I've found that it can be a bit simpler to merely ac...