Tutorial by Examples: l

Valo

@theme("valo")

vaadin • Themes

Cut a image into a circle - Objective C

import #include <math.h> The code in the viewDidLoad or loadView should look something look something like this - (void)loadView { [super loadView]; UIImageView *imageView=[[UIImageView alloc]initWithFrame:CGRectMake(0, 50, 320, 320)]; [self.view addSubview:imageView]; UIImage *image=[U...

iOS • Cut a UIImage into a circle

First program - "Hello World"

Copy paste this code and launch your program : @Theme(ValoTheme.THEME_NAME) //[optional] adds Vaadin built in theming public class SampleUI extends UI { @Override protected void init(VaadinRequest request) { final VerticalLayout rootLayout = new VerticalLayout(); Label...

vaadin • Getting started with vaadin

Objective C code to make selected corner of a UiView rounded

First import #import <QuartzCore/QuartzCore.h> into your ViewController class. Here is how I set my view in code UIView *view1=[[UIView alloc]init]; view1.backgroundColor=[UIColor colorWithRed:255/255.0 green:193/255.0 blue:72/255.0 alpha:1.0]; CGRect view1Frame = view1.frame; view1Frame....

iOS • Make selective UIView corners rounded

Objective C code to convert HTML string to NSAttributedString and Vice Versa

HTML to NSAttributedString conversion Code :- //HTML String NSString *htmlString=[[NSString alloc]initWithFormat:@"<!DOCTYPE html><html><body><h1>My First Heading</h1><p>My first paragraph.</p></body></html>"]; //Converting HTML s...

iOS • Convert HTML to NSAttributed string and vice verse

Simple usage for anything that has a Length member

let inline getLength s = (^a: (member Length: _) s) //usage: getLength "Hello World" // or "Hello World" |> getLength // returns 11

F# • Statically Resolved Type Parameters

Class, Interface, Record usage

// Record type Ribbon = {Length:int} // Class type Line(len:int) = member x.Length = len type IHaveALength = abstract Length:int let inline getLength s = (^a: (member Length: _) s) let ribbon = {Length=1} let line = Line(3) let someLengthImplementer = { new IHaveALength wit...

F# • Statically Resolved Type Parameters

Merge Sort Implementation in C & C#

C Merge Sort int merge(int arr[],int l,int m,int h) { int arr1[10],arr2[10]; // Two temporary arrays to hold the two arrays to be merged int n1,n2,i,j,k; n1=m-l+1; n2=h-m; for(i=0; i<n1; i++) arr1[i]=arr[l+i]; for(j=0; j<n2; j++) arr2[j]=arr[m+j+1]; arr...

algorithm • Merge Sort

Simple Drop Implementation

use std::ops::Drop; struct Foo(usize); impl Drop for Foo { fn drop(&mut self) { println!("I had a {}", self.0); } }

Rust • The Drop Trait - Destructors in Rust

Drop for Cleanup

use std::ops::Drop; #[derive(Debug)] struct Bar(i32); impl Bar { fn get<'a>(&'a mut self) -> Foo<'a> { let temp = self.0; // Since we will also capture `self` we.. // ..will have to copy the value out first Foo(self, temp) ...

Rust • The Drop Trait - Destructors in Rust

Setting place type filters for PlaceAutocomplete

In some scenarios, we might want to narrow down the results being shown by PlaceAutocomplete to a specific country or maybe to show only Regions. This can be achieved by setting an AutocompleteFilter on the intent. For example, if I want to look only for places of type REGION and only belonging to I...

Android • Android Places API

Creating a shared link for a file using curl in PHP

<?php $parameters = array('path' => '/test.txt'); $headers = array('Authorization: Bearer <ACCESS_TOKEN>', 'Content-Type: application/json'); $curlOptions = array( CURLOPT_HTTPHEADER => $headers, CURLOPT_POST => true, CURLOPT_PO...

Dropbox API • Getting a shared link for a file or folder

Logging

Puppet agnet logs messages. You can view this logs here: Linux - /var/log/puppet/puppet.log Windows - view the Event Viewer (Control Panel → System and Security → Administrative Tools → Event Viewer)

puppet • Agent

Pitfall: thinking of variables as objects

No Java variable represents an object. String foo; // NOT AN OBJECT Neither does any Java array contain objects. String bar[] = new String[100]; // No member is an object. If you mistakenly think of variables as objects, the actual behavior of the Java language will surprise you. For...

Java Language • Common Java Pitfalls

FromAssembly Class

Another way to .Install installers is by using Castle's FromAssembly class. It gives an array of functions to locate installers in the loaded assemblies. For example: //Will locate IInstallers in the current assembly that is calling the method container.Install(FromAssembly.This()); For more d...

castle-windsor • Installers

Installing from Configuration

Castle enables to register components also via XML Registration. //To install from the app/web.config container.Install(Configuration.FromAppConfig()); //To install from an xml file Configuration.FromXmlFile("relative_path_to_file.xml"); Read Castle's documentation for "What ...

castle-windsor • Installers

A real-world example from a Household controller

Background: The Household entity includes a set of options, each of which is an entity that is managed in an admin backend. Each option has a boolean enabled flag. If a previously enabled option is set to disabled it will need to be persisted in later Household edits, but cannot be edited away. T...

symfony2 • Sending options to a form class

How the custom options are used in the form class

->add('housing', EntityType::class, array( 'class' => 'AppBundle:Housing', 'choice_label' => 'housing', 'placeholder' => '', 'attr' => (in_array('Housing', $options['disabledOptions']) ? ['disabled' => 'disabl...

symfony2 • Sending options to a form class

Simple CASE statement

In a simple case statement, one value or variable is checked against multiple possible answers. The code below is an example of a simple case statement: SELECT CASE DATEPART(WEEKDAY, GETDATE()) WHEN 1 THEN 'Sunday' WHEN 2 THEN 'Monday' WHEN 3 THEN 'Tuesday' WHEN 4 THEN 'Wednes...

Microsoft SQL Server • CASE Statement

Lazily-Evaluated Lists

It's possible to make a simple lazily-evaluated list using mutable types and closures. A lazily-evaluated list is a list whose elements are not evaluated when it's constructed, but rather when it is accessed. Benefits of lazily evaluated lists include the possibility of being infinite. import Base:...

Julia Language • Iterables