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C++ performance challenge: integer to std::string conversion
...
#include <string>
const char digit_pairs[201] = {
"00010203040506070809"
"10111213141516171819"
"20212223242526272829"
"30313233343536373839"
"40414243444546474849"
"50515253545556575859"
"60616263646566676869"
"70717273747576777879"
"808182...
How to get the type of T from a member of a generic class or method?
...ut reflection:
public static Type GetListType<T>(this List<T> _)
{
return typeof(T);
}
Or more general:
public static Type GetEnumeratedType<T>(this IEnumerable<T> _)
{
return typeof(T);
}
Usage:
List<string> list = new List<string> { "a",...
Download File to server from URL
...
Since PHP 5.1.0, file_put_contents() supports writing piece-by-piece by passing a stream-handle as the $data parameter:
file_put_contents("Tmpfile.zip", fopen("http://someurl/file.zip", 'r'));
From the manual:
If data [that is the second a...
map vs. hash_map in C++
I have a question with hash_map and map in C++. I understand that map is in STL, but hash_map is not a standard. What's the difference between the two?
...
Parse email content from quoted reply
... matched, I try to use the next one.
new Regex("From:\\s*" + Regex.Escape(_mail), RegexOptions.IgnoreCase);
new Regex("<" + Regex.Escape(_mail) + ">", RegexOptions.IgnoreCase);
new Regex(Regex.Escape(_mail) + "\\s+wrote:", RegexOptions.IgnoreCase);
new Regex("\\n.*On.*(\\r\\n)?wrote:\\r\\n", ...
How do you find the current user in a Windows environment?
...answered Oct 22 '09 at 13:41
the_mandrillthe_mandrill
26.4k44 gold badges5555 silver badges8989 bronze badges
...
Django template how to look up a dictionary value with a variable
...om django.template.defaulttags import register
...
@register.filter
def get_item(dictionary, key):
return dictionary.get(key)
(I use .get so that if the key is absent, it returns none. If you do dictionary[key] it will raise a KeyError then.)
usage:
{{ mydict|get_item:item.NAME }}
...
Is there a portable way to print a message from the C preprocessor?
...pragma message" and "warning" somehow? For example, something like: #ifdef _LINUX #define #preprocmsg "#warning" else #define #preprocmsg "#pragma message"... I'll have to try that but instinct tells me the answer is no.
– Bryan
Sep 30 '10 at 0:41
...
Remove all special characters, punctuation and spaces from string
... place" -> "greatplace". How to avoid it?
– Reihan_amn
Jul 19 '17 at 19:19
6
@Reihan_amn Simpl...
How to get all groups that a user is a member of?
...pal.WindowsIdentity]::GetCurrent()
$groups = $id.Groups | foreach-object {$_.Translate([Security.Principal.NTAccount])}
$groups | select *
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