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Sort objects in ArrayList by date?
...our object comparable:
public static class MyObject implements Comparable<MyObject> {
private Date dateTime;
public Date getDateTime() {
return dateTime;
}
public void setDateTime(Date datetime) {
this.dateTime = datetime;
}
@Override
public int compareTo(MyObject o)...
Installing multiple instances of the same windows service on a server
...page to be useful: http://journalofasoftwaredev.wordpress.com/2008/07/16/multiple-instances-of-same-windows-service/. You can insert code into the installer to get the service name that you want when you run installutil.
– Vivian River
Feb 2 '10 at 21:58
...
Filter Java Stream to 1 and only 1 element
... want to guarantee, however, that there is one and only one match to the filter criteria.
20 Answers
...
What's the difference between HEAD^ and HEAD~ in Git?
...ing Revisions” section of the git rev-parse documentation defines ~ as
<rev>~<n>, e.g. master~3
A suffix ~<n> to a revision parameter means the commit object that is the nth generation ancestor of the named commit object, following only the first parents. For example, <rev>...
“where 1=1” statement [duplicate]
... Code:
commandText = "select * from car_table where 1=1";
if (modelYear <> 0) commandText += " and year="+modelYear
if (manufacturer <> "") commandText += " and value="+QuotedStr(manufacturer)
if (color <> "") commandText += " and color="+QuotedStr(color)
if (californi...
How to define “type disjunction” (union types)?
...ucts
type ¬¬[A] = ¬[¬[A]]
type |∨|[T, U] = { type λ[X] = ¬¬[X] <:< (T ∨ U) }
you can write union types as follows:
def size[T : (Int |∨| String)#λ](t : T) = t match {
case i : Int => i
case s : String => s.length
}
...
Reorder levels of a factor without changing order of values
...
Use the levels argument of factor:
df <- data.frame(f = 1:4, g = letters[1:4])
df
# f g
# 1 1 a
# 2 2 b
# 3 3 c
# 4 4 d
levels(df$g)
# [1] "a" "b" "c" "d"
df$g <- factor(df$g, levels = letters[4:1])
# levels(df$g)
# [1] "d" "c" "b" "a"
df
# f g
# 1 1 ...
What does “Could not find or load main class” mean?
...
The java <class-name> command syntax
First of all, you need to understand the correct way to launch a program using the java (or javaw) command.
The normal syntax1 is this:
java [ <options> ] <class-name> [<...
Copy constructor for a class with unique_ptr
...t or convert the unique_ptr to a shared_ptr.
class A
{
std::unique_ptr< int > up_;
public:
A( int i ) : up_( new int( i ) ) {}
A( const A& a ) : up_( new int( *a.up_ ) ) {}
};
int main()
{
A a( 42 );
A b = a;
}
You can, as NPE mentioned, use a move-ctor instead of a cop...
Passing an enum value as command parameter from XAML
...
Try this
<Button CommandParameter="{x:Static local:SearchPageType.First}" .../>
local - is your namespace reference in the XAML
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