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What is a regular expression for a MAC Address?
... as 0102-0304-abcd
^([[:xdigit:]]{2}[:.-]?){5}[[:xdigit:]]{2}$
Example strings which it matches:
01:02:03:04:ab:cd
01-02-03-04-ab-cd
01.02.03.04.ab.cd
0102-0304-abcd
01020304abcd
Mixed format will be matched also!
sha...
Access-control-allow-origin with multiple domains
...e RESPONSE_Access_Control_Allow_Origin portion:
In Rewrite you can use any string after RESPONSE_ and it will create the Response Header using the rest of the word as the header name (in this case Access-Control-Allow-Origin). Rewrite uses underscores "_" instead of dashes "-" (rewrite converts them...
Difference between IsNullOrEmpty and IsNullOrWhiteSpace in C# [duplicate]
... the
following code, except that it offers superior performance:
return String.IsNullOrEmpty(value) || value.Trim().Length == 0;
White-space characters are defined by the Unicode standard. The
IsNullOrWhiteSpace method interprets any character that returns a
value of true when it is pas...
What are the most-used vim commands/keypresses?
...en posted to death already btw) draw's this much attention while going the extra mile other posters put in do not...
– Lieven Keersmaekers
Mar 23 '11 at 7:28
...
Effects of changing Django's SECRET_KEY
...the items listed here use SECRET_KEY through django.utils.crypt.get_random_string() which uses it to seed the random engine. This won't be impacted by a change in value of SECRET_KEY.
User experience directly impacted by a change of value are:
sessions, the data decode will break, that is valid f...
Deserialize JSON into C# dynamic object?
...avaScriptConverter
{
public override object Deserialize(IDictionary<string, object> dictionary, Type type, JavaScriptSerializer serializer)
{
if (dictionary == null)
throw new ArgumentNullException("dictionary");
return type == typeof(object) ? new DynamicJ...
How to get the type of a variable in MATLAB?
...
for conditionals: if ( string(class(b)) == 'double' ) fprintf(1, 'b is double'); end
– khaverim
Apr 16 at 18:09
add a comme...
Common MySQL fields and their appropriate data types
... |
| salt | CHAR(x) | randomly generated string, usually of
fixed length (x)
| digest (md5) | CHAR(32) | |
| phone number | VAR...
What should I do if two libraries provide a function with the same name generating a conflict?
...ding libraries in a hex editor and change all occurrences of the offending strings to something else. You should then be able to use the new names in all future calls.
UPDATE: I just did it on this end and it seems to work. Of course, I've not tested this thoroughly - it may be no more than a re...
Undefined, unspecified and implementation-defined behavior
...
p[5] = 'w';
std::cout << p;
}
The variable p points to the string literal "hello!\n", and the two assignments below try to modify that string literal. What does this program do? According to section 2.14.5 paragraph 11 of the C++ standard, it invokes undefined behavior:
The effect o...