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Good scalaz introduction [closed]
...introduction to the library. Seems that scalaz incorporates a lot of ideas from haskell and mathematics. Most articles that I found assume that you already feel comfortable with these concepts.
...
Escape angle brackets in a Windows command prompt
...sion
set "line=<html>"
echo !line!
Or you could use a FOR /F loop. From the command line:
for /f "delims=" %A in ("<html>") do @echo %~A
Or from a batch script:
@echo off
for /f "delims=" %%A in ("<html>") do echo %%~A
The reason these methods work is because both delayed e...
(-2147483648> 0) returns true in C++?
...t can: 2147483648 has unsigned int ???? type.
In the second you force int from the unsigned.
const bool i= (-2147483648 > 0) ; // --> true
warning C4146: unary minus operator applied to unsigned type, result still unsigned
Here are related "curiosities":
const bool b= (-21474836...
Are there any SHA-256 javascript implementations that are generally considered trustworthy?
...gBuffer);
// convert ArrayBuffer to Array
const hashArray = Array.from(new Uint8Array(hashBuffer));
// convert bytes to hex string
const hashHex = hashArray.map(b => ('00' + b.toString(16)).slice(-2)).join('');
return hashHex;
}
Note that crypto.subtle in...
How to version REST URIs
...
Ah, I'm putting my old grumpy hat on again.
From a ReST perspective, it doesn't matter at all. Not a sausage.
The client receives a URI it wants to follow, and treats it as an opaque string. Put whatever you want in it, the client has no knowledge of such a thing as a...
How to compare two dates?
...
Use the datetime method and the operator < and its kin.
>>> from datetime import datetime, timedelta
>>> past = datetime.now() - timedelta(days=1)
>>> present = datetime.now()
>>> past < present
True
>>> datetime(3000, 1, 1) < present
False
&g...
DESTDIR and PREFIX of make
...alling to a temporary directory which is not where the package will be run from. For example this is used when building deb packages. The person building the package doesn't actually install everything into its final place on his own system. He may have a different version installed already and not ...
Can you have multiple $(document).ready(function(){ … }); sections?
...hat a function defined within one $(document).ready block cannot be called from another $(document).ready block, I just ran this test:
$(document).ready(function() {
alert('hello1');
function saySomething() {
alert('something');
}
saySomething();
});
$(document).ready(funct...
How to do case insensitive string comparison?
..., then it's a little more complicated 'cause you need to generate a RegExp from the string but passing the string to RegExp constructor can result in incorrect matches or failed matches if the string has special regex characters in it.
If you care about internationalization don't use toLowerCase() ...
Easy way to test a URL for 404 in PHP?
...ser has contributed the following:
/**
This is a modified version of code from "stuart at sixletterwords dot com", at 14-Sep-2005 04:52. This version tries to emulate get_headers() function at PHP4. I think it works fairly well, and is simple. It is not the best emulation available, but it works.
...