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Why is there “data” and “newtype” in Haskell? [duplicate]
... Bool
inside the CoolBool was True or False:
helloMe :: CoolBool -> String
helloMe (CoolBool _) = "hello"
Instead of applying this function to a normal CoolBool, let's throw it a curveball and apply it to undefined!
ghci> helloMe undefined
"*** Exception: Prelude.undefined
...
How to HTML encode/escape a string? Is there a built-in?
I have an untrusted string that I want to show as text in an HTML page. I need to escape the chars ' < ' and ' & ' as HTML entities. The less fuss the better.
...
Import CSV file to strongly typed data structure in .Net [closed]
...
Use an OleDB connection.
String sConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\\InputDirectory\\;Extended Properties='text;HDR=Yes;FMT=Delimited'";
OleDbConnection objConn = new OleDbConnection(sConnectionString);
objConn.Open()...
Floating point vs integer calculations on modern hardware
...application. If you are developing for the x86 architecture, and you need extra performance, you might want to look into using the SSE extensions. This can greatly speed up single-precision floating point arithmetic, as the same operation can be performed on multiple data at once, plus there is a ...
Linux Glibc幽灵漏洞允许黑客远程获取系统权 - 操作系统(内核) - 清泛网 - ...
...<< EOF #include <netdb.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <errno.h> #define CANARY"in_the_coal_mine" struct { char buffer[1024]; char canary[sizeof(CANARY)]; } temp = { "buffer", CANARY }; int main(void) { struct hostent resbuf; struct hostent *result; int herrno;...
How to remove line breaks from a file in Java?
How can I replace all line breaks from a string in Java in such a way that will work on Windows and Linux (ie no OS specific problems of carriage return/line feed/new line etc.)?
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Can a C++ enum class have methods?
...r.
You could easily add methods such that:
Fruit f("Apple");
and
f.ToString();
can be supported.
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\d is less efficient than [0-9]
...rate a list of all such characters using the following code:
var sb = new StringBuilder();
for(UInt16 i = 0; i < UInt16.MaxValue; i++)
{
string str = Convert.ToChar(i).ToString();
if (Regex.IsMatch(str, @"\d"))
sb.Append(str);
}
Console.WriteLine(sb.ToString());
Which generates...
What's a good hex editor/viewer for the Mac? [closed]
... Mac - Synalyze It!. It costs 7 € / 40 € (Pro version) and offers some extra features like histogram, incremental search, support of many text encodings and interactive definition of a "grammar" for your file format.
The grammar helps to interpret the files and colors the hex view for easier an...
Regex Named Groups in Java
...p "name"
${name} to reference to captured group in Matcher's replacement string
Matcher.group(String name) to return the captured input subsequence by the given "named group".
Other alternatives for pre-Java 7 were:
Google named-regex (see John Hardy's answer)
Gábor Lipták mentions (N...