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Is there a DesignMode property in WPF?
... some cases I need to know, whether a call to my non-UI class is initiated by the designer (like if I create a DataContext class from XAML). Then the approach from this MSDN article is helpful:
// Check for design mode.
if ((bool)(DesignerProperties.IsInDesignModeProperty.GetMetadata(typeof(Depend...
Opening port 80 EC2 Amazon web services [closed]
... Also, check your firewall (as nsof stated). RHEL has iptables started by default. Windows has windows FW. Turn them off and see if that was the problem. If it was, then edit the firewall to allow 80/443 and restart
– Andrew Backer
Feb 28 '14 at 8:36
...
Latex Remove Spaces Between Items in List
...he highest voted answer also mentioned the enumitem package (here answered by Stefan), but I also like this one, which involves creating your own itemizing environment instead of loading a new package:
\newenvironment{myitemize}
{ \begin{itemize}
\setlength{\itemsep}{0pt}
\setlength{\parski...
R apply function with multiple parameters
...ctor variables and must compute itself on each value of them (as mentioned by @Ari B. Friedman) you can use mapply as follows:
vars1<-c(1,2,3)
vars2<-c(10,20,30)
mult_one<-function(var1,var2)
{
var1*var2
}
mapply(mult_one,vars1,vars2)
which gives you:
> mapply(mult_one,vars1,vars2...
In Postgresql, force unique on combination of two columns
...is case. From the PostgeSQL docs: "Note that a unique constraint does not, by itself, provide a unique identifier because it does not exclude null values.)" postgresql.org/docs/8.1/static/ddl-constraints.html#AEN2038
– ndequeker
Feb 3 '17 at 13:53
...
What is the difference between cout, cerr, clog of iostream header in c++? When to use which one?
...tderr are different streams, even though they both refer to console output by default. Redirecting (piping) one of them (e.g. program.exe >out.txt) would not affect the other.
Generally, stdout should be used for actual program output, while all information and error messages should be printed t...
How do you change Background for a Button MouseOver in WPF?
...in That seems so backwards! Why should a user-defined trigger be overriden by default ones? I understand the hierarchy, ControlTemplate is above Style, but I don't understand why it has to be so difficult to override basic settings like these.
– Fuselight
Nov 4...
How to extract a string using JavaScript Regex?
...multiple lines (i.e., match the beginning or end of each line
(delimited by \n or \r), not only the very beginning or end of the
whole input string)
Also put the * in the right place:
"DATE:20091201T220000\r\nSUMMARY:Dad's birthday".match(/^SUMMARY\:(.*)$/gm);
//------------------------------...
Private and protected constructor in Scala
...
You can declare the default constructor as private/protected by inserting the appropriate keyword between the class name and the parameter list, like this:
class Foo private () {
/* class body goes here... */
}
...
Const before or const after?
... to an asterisk does not matter is that the C grammar was defined that way by Kernighan and Ritchie.
The reason they defined the grammar in this way was likely that their C compiler parsed input from left-to-right and finished processing each token as it consumed that. Consuming the * token change...