Tutorial by Examples: l

ActiveForm Validations

You can enable/disable ajax and client validations in active form. $form = ActiveForm::begin([ 'id' => 'signup-form', 'enableClientValidation' => true, 'enableAjaxValidation' => true, 'validationUrl' => Url::to('signup'), ]); enableClientValidation is by defaul...

yii2 • Yii2 ActiveForm

Accessing Barometer to get relative altitude

Swift Import the Core Motion library: import CoreMotion Next, we need to create a CMAltimeter object, but a common pitfall is to create it in the viewDidLoad(). If done that way, the altimeter won’t be accessible when we need to call a method on it. Nevertheless, go ahead and create your CMAlti...

iOS • Core Motion

Override default response messages

Springfox defines a set default response messages that are applied to all API controllers by default. This includes e.g. 201 - Created and 204 - No Content, as well as several 40x responses. There might be cases, in which the default response messages don't apply for your API. You have to build-in p...

swagger • springfox

Installation or Setup

v8 uses the Google depot_tools for getting the source and building the library. To install depot_tools, follow the instructions here: https://www.chromium.org/developers/how-tos/install-depot-tools Get the v8 source by running /path/to/depot_tools/fetch v8 After running this command, to pull ...

v8 • Getting started with v8

Installation or Setup

Detailed instructions on getting CentOS 7 installation and basic set up for starting on. Download latest CentOS .ISO - https://www.centos.org/download/ After downloading the last version of CentOS using above links or using official CentOS download page. Burn it to a DVD or create a bootable USB...

centos • Getting started with centos

Relational operators

Of all the operators, relational operators are the most complex ones, that is why we left them to the end. Relational operators are also known as Comparison operators, they are used to compare things. Comparison result is boolean false or true. Interestingly though, if you check it in V...

visual-foxpro • Operators

Installation or Setup

Detailed instructions on getting twitter set up or installed.

twitter • Getting started with twitter

Hide/Show HTML Elements

This example hide show html elements. <!DOCTYPE html> <html ng-app="myDemoApp"> <head> <script src="https://code.angularjs.org/1.5.8/angular.min.js"></script> <script> function HideShowController() { var vm = th...

AngularJS • Use of in-built directives

Keeping Compatability

Of course, just like most things in browser JavaScript, you just can't count on the fact that everything will be the same everywhere. In this case, requestAnimationFrame might have a prefix on some platforms and are named differently, such as webkitRequestAnimationFrame. Fortunately, there's a reall...

JavaScript • requestAnimationFrame

Building a composite index

In many situations, a composite index performs better than an index with a single column. To build an optimal composite index, populate it with columns in this order. = column(s) from the WHERE clause first. (eg, INDEX(a,b,...) for WHERE a=12 AND b='xyz' ...) IN column(s); the optimizer may be...

MySQL • Mysql Performance Tips

Simple Function

call :FunctionX rem More code... :FunctionX rem Some code here. goto :eof This is a very simple function. Functions are in-program commands that do multiple commands at a time. Functions are made by creating a label and putting code in it, and once it is done, you add a goto :eof or exit ...

batch-file • Functions

Function Utilizing setlocal and endlocal

set var1=123456789 set var2=abcdef call :specialvars echo %var1%, %var2% rem More code... :specialvars setlocal set var1=987654321 set var2=fedcba endlocal goto :eof When inside the section setlocal , endlocal section, variables are seperate from the caller's variables, hence why %var...

batch-file • Functions

Combining them all

set importantvar=importantstuff call :stuff 123 var1 rem More code... :stuff <arg1> <arg2> setlocal set importantvar=%~1 echo Writing some stuff into %~2! endlocal set %~2=some stuff setlocal set importantvar=junk endlocal goto :eof This utilizes the basic function, setl...

batch-file • Functions

Site Built With Apex

Site Built With Apex which shows list of application built with Oracle application express.

oracle-apex • Getting started with oracle-apex

Pre-Steps needed in order to use Entity Framework 6.1.3 with PostgresSql using Npgsqlddexprovider

1)Took backup of Machine.config from locations C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config and C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Config 2)Copy them to different location and edit them as a)locate and add under <system.data> <DbProviderFactories> ...

Entity Framework • Entity-Framework with Postgresql

Global Exception Resolver

@Component public class RestExceptionResolver extends ExceptionHandlerExceptionResolver { @Autowired //If you have multiple handlers make this a list of handlers private RestExceptionHandler restExceptionHandler; /** * This resolver needs to be injected because it is the...

spring-mvc • Global Exception Handling

Passing Props While Using Vue JSX

We have a parent component: Importing a child component in it we'll pass props via an attribute. Here the attribute is 'src' and we're passing the 'src' too. ParentComponent.js import ChildComponent from './ChildComponent'; export default { render(h, {props}) { const src = 'https://...

Vue.js • Props

Server Installation & Implementation

GraphQL.js GraphQL.js is a JavaScript reference implementation for GraphQL. You can install it via npm: Initialize npm in your project if you have not done so already: npm init Install GraphQL.js from npm: npm install --save graphql Example Server var { graphql, buildSchema } = require('gra...

graphql • Getting started with graphql

C/C++ version selection

Wanted version for C and C++ can be specified globally using respectively variables CMAKE_C_STANDARD (accepted values are 98, 99 and 11) and CMAKE_CXX_STANDARD (accepted values are 98, 11 and 14): set(CMAKE_C_STANDARD 99) set(CMAKE_CXX_STANDARD 11) These will add the needed compile options on t...

cmake • Compile features and C/C++ standard selection

2. Enable service broker on database

ALTER DATABASE [MyDatabase] SET ENABLE_BROKER WITH ROLLBACK IMMEDIATE;

Microsoft SQL Server • Service broker