Comparator cmp = [ compare:{ a, b -> a <=> b } ] as Comparator
def col = [ 'aa', 'aa', 'nn', '00' ]
SortedSet sorted = new TreeSet( cmp )
sorted.addAll col
assert '[00, aa, nn]' == sorted.toString()
Here is a very simple example of a function that "promises to proceed when a given time elapses". It does that by creating a new Deferred object, that is resolved later and returning the Deferred's promise:
function waitPromise(milliseconds){
// Create a new Deferred object using th...
my @letters = ( 'a' .. 'z' ); # English ascii-bet
print $letters[ rand @letters ] for 1 .. 5; # prints 5 letters at random
How it works
rand EXPR expects a scalar value, so @letters is evaluated in scalar context
An array in scalar context returns the number of elements it ...
The series of events here is supposed to work as follows:
Compile code with -pg option
Link code with -pg option
Run program
Program generates gmon.out file
Run gprof program
To add profiling flags, you must add to your CMakeLists.txt:
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pg"...
Inheritance among models can be done in two ways:
a common abstract class (see the "Model mixins" example)
a common model with multiple tables
The multi tables inheritance will create one table for the common fields and one per child model example:
from django.db import models
c...
// An 8-bit 'byte' value:
byte aByte = (byte)0b00100001;
// A 16-bit 'short' value:
short aShort = (short)0b1010000101000101;
// Some 32-bit 'int' values:
int anInt1 = 0b10100001010001011010000101000101;
int anInt2 = 0b101;
int anInt3 = 0B101; // The B can be upper or lower case.
// A ...
The example reads the first line from a file. It uses an instance of BufferedReader to read data from the file. BufferedReader is a resource that must be closed after the program is finished with it:
static String readFirstLineFromFile(String path) throws IOException {
try (BufferedReader br = n...
The following example shows other ways you can use the underscore in numeric literals:
long creditCardNumber = 1234_5678_9012_3456L;
long socialSecurityNumber = 999_99_9999L;
float pi = 3.14_15F;
long hexBytes = 0xFF_EC_DE_5E;
long hexWords = 0xCAFE_BABE;
long maxLong = 0x7fff_ffff_ffff_ffffL;...
You can use
Map<String, List<String>> myMap = new HashMap<>();
instead of
Map<String, List<String>> myMap = new HashMap<String, List<String>>();
However, you can't use
List<String> list = new ArrayList<>();
list.add("A");
...
public String getTypeOfDayWithSwitchStatement(String dayOfWeekArg) {
String typeOfDay;
switch (dayOfWeekArg) {
case "Monday":
typeOfDay = "Start of work week";
break;
case "Tuesday":
case "Wednes...
// Takes a callback and executes it with the read value
def readFile(path: String)(callback: Try[String] => Unit): Unit = ???
readFile(path) { _.flatMap { file1 =>
readFile(path2) { _.foreach { file2 =>
processFiles(file1, file2)
}}
}}
The function argument to readFile is...
If shift is called outside of a delimiting reset block, it can be used to create functions that themselves create continuations inside a reset block. It is important to note that shift's type is not just (((A => B) => C) => A), it is actually (((A => B) => C) => (A @cpsParam[B, C])...
We can have three cases to analyze an algorithm:
Worst Case
Average Case
Best Case
#include <stdio.h>
// Linearly search x in arr[]. If x is present then return the index,
// otherwise return -1
int search(int arr[], int n, int x)
{
int i;
for (i=0; i<n; i...
Not everything in a bindings library will have the same name in C# as it does in Java.
In C#, interface names start with "I", but Java has no such convention. When you import a Java library, an interface named SomeInterface will become ISomeInterface.
Similarly, Java doesn't have propert...
In order to create a workspace, one should run the following in the terminal:
$ mkdir -p ~/workspace_name/src
$ cd ~/workspace_name/src
$ catkin_init_workspace
$ cd ~/workspace_name/
$ catkin_make
The previous commands creates a workspace named workspace_name. Once a workspace has been creat...
Assuming a workspace named workspace_name has been previously created in the home directory, a package named package_name can be created by executing the following command lines.
$ cd ~/workspace_name/src/
$ catkin_create_pkg package_name rospy
The Null literal (written as null) represents the one and only value of the null type. Here are some examples
MyClass object = null;
MyClass[] objects = new MyClass[]{new MyClass(), null, new MyClass()};
myMethod(null);
if (objects != null) {
// Do something
}...
