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What is the difference between Collections.emptyList() and Collections.EMPTY_LIST
In Java, we have Collections.emptyList() and Collections.EMPTY_LIST . Both have the same property:
4 Answers
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How do I UPDATE from a SELECT in SQL Server?
...ue) then change the ON statement to something like ON Table.id = @IdToEdit AND other_table.id = @NewValue
– Trisped
Oct 24 '12 at 18:41
2
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How to sort an array by a date property
...plest Answer
array.sort(function(a,b){
// Turn your strings into dates, and then subtract them
// to get a value that is either negative, positive, or zero.
return new Date(b.date) - new Date(a.date);
});
More Generic Answer
array.sort(function(o1,o2){
if (sort_o1_before_o2) return -1...
How do you get the index of the current iteration of a foreach loop?
... collection, which will return an Enumerator.
This Enumerator has a method and a property:
MoveNext()
Current
Current returns the object that Enumerator is currently on, MoveNext updates Current to the next object.
The concept of an index is foreign to the concept of enumeration, and cannot be don...
Func delegate with no return type
... the Action delegates return void.
Func<TResult> takes no arguments and returns TResult:
public delegate TResult Func<TResult>()
Action<T> takes one argument and does not return a value:
public delegate void Action<T>(T obj)
Action is the simplest, 'bare' delegate:
pu...
How to send a simple string between two programs using pipes?
...r pipe can only connect two related processes. It is created by a process and will vanish when the last process closes it.
A named pipe, also called a FIFO for its behavior, can be used to connect two unrelated processes and exists independently of the processes; meaning it can exist even if no one...
Serialize an object to XML
...encapsulating the StringWriter, it is utilizing your passed-in StringWriterand has no expectation/responsibility to dispose of it. Further StringWriter is outside XmlWriter's scope, you may still want it when XmlWriter is disposed, it would be poor behavior for XmlWriter to dispose your StringWriter...
How to run Rake tasks from within Rake tasks?
...y_invoked state, allowing the task to
then be executed again, dependencies and all:
Rake::Task["build"].reenable
Rake::Task["build"].invoke
Note that dependencies already invoked are not automatically re-executed unless they are re-enabled. In Rake >= 10.3.2, you can use the following to re-ena...
Export a stash to another computer
... stash show "stash@{0}" -p > patch instead of the OP's second shell command.
– Tim Arnold
Mar 16 '16 at 15:03
1
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How to make a Java class that implements one interface with two generic types?
...ow that looks tome like code duplication... I encountered the same problem and found no other solution that looks clean.
– bln-tom
Jun 9 '11 at 19:42
110
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