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A monad is just a monoid in the category of endofunctors, what's the problem?
...)) = T = μ(T(η))
How do we translate this to Haskell code? Well, let's start with the notion of a natural transformation:
-- | A natural transformations between two 'Functor' instances. Law:
--
-- > fmap f . eta g == eta g . fmap f
--
-- Neat fact: the type system actually guarantees this la...
Convert an image to grayscale in HTML/CSS
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@SeanJA Thanks for the update, WebKit started implementing this stuff in December
– robertc
Mar 27 '12 at 0:16
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Bootstrap throws Uncaught Error: Bootstrap's JavaScript requires jQuery [closed]
...
Worked for me for a Django-Oscar project. This error starting showing up out-of-the-blue. I suppose messing with a completely unrelated code can change the rendering sequence and trigger this error.
– MadPhysicist
Jul 30 '17 at 19:03
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How to cat a file containing code?
...example. Also, tangentially, here-strings <<< are only available starting from Bash 3, and not portable to other shells.
– tripleee
Jun 26 '15 at 3:23
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ASP.NET MVC Relative Paths
...efix, I wonder why something like this wasn't built in to ASP.NET from the start.
– Chris
Sep 17 '12 at 15:24
4
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Is there a foreach in MATLAB? If so, how does it behave if the underlying data changes?
...lity, including the foreach functionality. Here some examples:
1) Define start, increment and end index
for test = 1:3:9
test
end
2) Loop over vector
for test = [1, 3, 4]
test
end
3) Loop over string
for test = 'hello'
test
end
4) Loop over a one-dimensional cell array
for test ...
Is it valid to replace http:// with // in a ?
...ng relative URIs (Section 5.2), you can omit any of those sections, always starting from the left. In pseudo-code, it looks like this:
result = ""
if defined(scheme) then
append scheme to result;
append ":" to result;
endif;
if defined(authority) then
append "//" to result;
...
How can I remove a character from a string using Javascript?
...:
/[aA]{4,8}(Eat at Joes|Joes all you can eat)[0-5]+/
As wacky as regEx starts to look, it all breaks down to series of things (potentially multi-character things) following each other sequentially. Kind of a basic point but one that took me a while to get past so I've gone overboard explaining i...
Parse RSS with jQuery
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For those of us coming to the discussion late, starting with 1.5 jQuery has built-in xml parsing capabilities, which makes it pretty easy to do this without plugins or 3rd party services. It has a parseXml function, and will also auto-parse xml when using the $.get funct...
Useful GCC flags for C
...a575503c1]
./a.out(main+0x90) [0x400a54]
/lib/libc.so.6(__libc_start_main+0xfd) [0x7f3a571e2c4d]
Nearby object 1: checked region begins 0B into and ends 4B after
mudflap object 0xf9c560: name=`mf.c:3:6 (main) a'
bounds=[0x7fff96eb3d00,0x7fff96eb3d27] size=40 area=stack check=0r/3w livene...