Tutorial by Examples: g

use strict; use warnings; use Gtk2 -init; my $window = Gtk2::Window->new(); $window->show(); Gtk2->main(); 0;

Perl has a number of sigils: $scalar = 1; # individual value @array = ( 1, 2, 3, 4, 5 ); # sequence of values %hash = ('it', 'ciao', 'en', 'hello', 'fr', 'salut'); # unordered key-value pairs &function('arguments'); # subroutine *typeglob; # symbol table entry These look like sigils, but...

Pig provides an engine for executing data flows in parallel on Hadoop. It includes a language, Pig Latin, for expressing these data flows. Pig Latin includes operators for many of the traditional data operations (join, sort, filter, etc.), as well as the ability for users to develop their own fun...

package main import ( "fmt" "k8s.io/client-go/1.5/kubernetes" "k8s.io/client-go/1.5/pkg/api/v1" "k8s.io/client-go/1.5/tools/clientcmd" ) func main() { config, err := clientcmd.BuildConfigFromFlags("", <kube-config-path&g...

A Bootstrap modal dialog is a Bootstrap component which creates a modal dialog window which floats over page-level content. Here is an example of the basic usage of a Bootstrap modal dialog in HTML: <div class="modal fade" tabindex="-1" role="dialog"> <div...

Modal dialog components can be instantiated via jQuery with the function $('#myModal').modal(options), where $('#myModal') is a top-level reference to the specific modal dialog and options is a Javascript object specifying the modal dialog's default attributes. The options object allows for multipl...

Depending on the version of Weka being used different methods for loading ARFF files should be utilised. Weka <3.5.5 The following sample code shows how to load an ARFF file: import weka.core.Instances; import java.io.BufferedReader; import java.io.FileReader; ... BufferedReader reader = n...

Many databases can be used in Weka. Firstly, the DatabaseUtils.props file must be edited to match your database; specifically you must provide your database's name, location, port and correct driver. jdbcDriver=org.gjt.mm.mysql.Driver jdbcURL=jdbc:mysql://localhost:3306/my_database Then the dat...

IronPython enables to use generic classes and methods from the .net framework. Generics can be used with the same syntax as accessing an index. For passing more than one type-parameter, they must be separated with a comma: l = Dictionary[int, str]() That way we create a dictionary where keys on...

url = 'http://httpbin.org/post' files = {'file': ('report.csv', 'some,data,to,send\nanother,row,to,send\n')} r = requests.post(url, files=files) r.text

A literal inside a enumeration is a discrete type so we can use attribute Image to find out which literal it is as text form. Notice that this prints out the same word as in the code (but in upper case). with Ada.Text_IO; use Ada.Text_IO; procedure Main is type Fruit is (Banana, Pear, Orang...

Instead of attribute Image and Ada.Text_IO.Put on enumeration literals we can only use the generic package Ada.Text_IO.Enumeration_IO to print out the literals. with Ada.Text_IO; use Ada.Text_IO; procedure Main is type Fruit is (Banana, Pear, Orange, Melon); package Fruit_IO is new Enume...

You can set the desired UI widget's stylesheet using any valid CSS. The example below will set a QLabel's text color a border around it. #include "mainwindow.h" #include "ui_mainwindow.h" MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::Mai...

Simply specifying a file destination, echo will create, write, or append to a file. <echo file=example.txt" append="false"> hello world </echo>

If your code is running behind a proxy and you know the end point, you can set this information in your code. requests accepts a proxies parameter. This should be a dictionary that maps protocol to the proxy URL. proxies = { 'http': 'http://proxy.example.com:8080', 'https': 'http://securepro...

requests uses specific environment variables automatically for proxy detection. HTTP_PROXY will define the proxy URL to use for HTTP connections HTTPS_PROXY will define the proxy URL to use for HTTPS connections Once these environment variables are set, the Python code does not need to pass a...

The whole ES6 spec is not yet implemented in its entirety so you will only be able to use some of the new features. You can see a list of the current supported ES6 features at http://node.green/ Since NodeJS v6 there has been pretty good support. So if you using NodeJS v6 or above you can enjoy usi...

Xcode by itself has quite a few good tools built in, but sometimes you just want to change a specific behavior or create a convenience shortcut. That's why there's Alcatraz. Installation curl -fsSL https://raw.githubusercontent.com/supermarin/Alcatraz/deploy/Scripts/install.sh | sh Throw this ...

Console Module Similar to the browser environment of JavaScript node.js provides a console module which provides simple logging and debugging possibilities. The most important methods provided by the console module are console.log, console.error and console.time. But there are several others like ...

Open phone's settings open battery open menu and select "battery optimization" from the dropdown menu select "all apps" select the app you want to whitelist select "don't optimize" Now this app will show under not optimized apps. An app can check whether it's...