In Java, any object or primitive type can be an array. Array indicies are accessed via arrayName[index], e.g. myArray[0]. Values in an array are set via myArray[0] = value, e.g. if myArray is an array of type String[] myArray[0] = "test";
public class CreateBasicArray{
public static ...
public class CreateAnArray{
public static void main(String[] args){
// Creates a new array of Strings with a length of 3
// This length cannot be changed later
String[] myStringArray = new String[3];
myStringArray[0] = "Hello"; // Java array ind...
HTML DOM is Expensive
Each web page is represented internally as a tree of objects. This representation is called Document Object Model. Moreover, it is a language-neutral interface that allows programming languages (such as JavaScript) to access the HTML elements.
In other words
The HTML DOM...
Create a new JobService
This is done by extending the JobService class and implementing/overriding the required methods onStartJob() and onStopJob().
public class MyJobService extends JobService
{
final String TAG = getClass().getSimpleName();
@Override
public boolean onStart...
Define the variables within a formula field:
Shared NumberVar x := 1000;
Shared NumberVar y;
Assigning the values is optional. To display the variable in a second formula later on in the report, the call is nearly identical:
Shared NumberVar x;
x
This is a simple trigger function.
CREATE OR REPLACE FUNCTION my_simple_trigger_function()
RETURNS trigger AS
$BODY$
BEGIN
-- TG_TABLE_NAME :name of the table that caused the trigger invocation
IF (TG_TABLE_NAME = 'users') THEN
--TG_OP : operation the trigger was fired
IF (TG_O...
The matplotlib.animation package offer some classes for creating animations. FuncAnimation creates animations by repeatedly calling a function. Here we use a function animate() that changes the coordinates of a point on the graph of a sine function.
import numpy as np
import matplotlib.pyplot as p...
This example uses the map format introduced in Erlang/OTP 18.0.
%% A module implementing a supervisor usually has a name ending with `_sup`.
-module(my_sup).
-behaviour(supervisor).
%% API exports
-export([start_link/0]).
%% Behaviour exports
-export([init/1]).
start_link() ->
...
The export tool exports a set of files from HDFS back to an RDBMS. The target table must already exist in the database. The input files are read and parsed into a set of records according to the user-specified delimiters.
Example :
sqoop export \
--connect="jdbc:<databaseconnector>&quo...
Jersey (2) uses HK2 as its dependency injection (DI) system. We can use other injection systems, but its infrastructure is built with HK2, and allows us to also use it within our applications.
Setting up simple dependency injection with Jersey takes just a few lines of code. Let say for example we ...
The pandas.DataFrame.apply() method is used to apply a given function to an entire DataFrame --- for example, computing the square root of every entry of a given DataFrame or summing across each row of a DataFrame to return a Series.
The below is a basic example of usage of this function:
# create...
Framebuffer is a type of buffer which stores color values, depth and stencil information of pixels in memory. When you draw something in OpenGL the output is stored in the default framebuffer and then you actually see the color values of this buffer on screen. You can also make your own framebuffer ...
This Example assumes you setup as explained in Example: Setting Up Environment for aurelia-cli Explained of this document.
Creating a new project
In main host os, open terminal (Mac OS in my case)
$cd /path/to/project/vagrant
$vagrant up (Launches VM GUI)
Log into VM via UI
U...
Func<int, int> add1 = i => i + 1;
Func<int, int, int> add = (i, j) => i + j;
// Behaviourally equivalent to:
int Add1(int i)
{
return i + 1;
}
int Add(int i, int j)
{
return i + j;
}
...
Console.WriteLine(add1(42)); //43
Console.WriteLine(Add1(42));...
The basic method to escape reserved words for SQL Server is the use of the square brackets ([ and ]). For example, Description and Name are reserved words; however, if there is an object using both as names, the syntax used is:
SELECT [Description]
FROM dbo.TableName
WHERE [Name] = 'foo'
T...
Will talk about directory structure of CakePHP, what each folder means.
CakePHP has some main folders
app - It Contains our application source code, all our code lies under this directory.
lib - This is the cakephp core liberary, it contains all the base cakephp library code. Editing code insid...
Creating a new array is slightly confusing, as there is no real identifier for an array in awk. So, an array cannot really be initialised with our AWK code.
An array in awk is associative, meaning that any string or number can be a key. This means that the array is more like a key-value pair dictio...
The following example will contain a block of code that is meant to be split into several source files, as denoted by // filename comments.
Source Files
// my_function.h
/* Note how this header contains only a declaration of a function.
* Header functions usually do not define implementations...
