Tutorial by Examples: s

Deploying on windows

Qt provides a deployment tool for Windows: windeployqt. The tool inspects a Qt application executable for its dependecies to Qt modules and creates a deployment directory with the necessary Qt files to run the inspected executable. A possible script may look like: set PATH=%PATH%;<qt_install_pre...

Installing Joomla with SSH - full cycle

Setup variables JUSERID=$[ ( $RANDOM % 100 ) + 1 ] JUSERNAME="admin" JUSEREMAIL="[email protected]" JUSERPASS="qweasd" DB="joomla_3" DBUSER="jdbuser" DBPASS="dbupass" DBPREFIX="prfx_" JOOMLAVERSION="3.6.2" ...

basic transaction skeleton with error handling

BEGIN TRY -- start error handling BEGIN TRANSACTION; -- from here on transactions (modifictions) are not final -- start your statement(s) select 42/0 as ANSWER -- simple SQL Query with an error -- end your statement(s) COMMIT TRANSACTION; -- finalize all transa...

Create a Basic Post

$basic_post_args = array( 'post_title' => 'My Basic Post', 'post_content' => 'This is a basic content', 'post_status' => 'publish', 'post_author' => 1, 'post_category' => array(8, 59) ); wp_insert_post( $basic_post_args );

Create a Basic Page

$basic_page_args = array( 'post_title' => 'My Basic Page', 'post_content' => 'This is a basic content', 'post_type' => 'page', 'post_status' => 'publish', 'post_author' => 1 ); wp_insert_post( $basic_page_args );

Setting up testing with Gulp, Webpack, Karma and Jasmine

The first thing we need is to tell karma to use Webpack to read our tests, under a configuration we set for the webpack engine. Here, I am using babel because I write my code in ES6, you can change that for other flavors, such as Typescript. Or I use Pug (formerly Jade) templates, you don't have to....

getActive() - Get active spreadsheet

This returns the currently active spreadsheet, or null if there is none. var currentSheet = SpreadsheetApp.getActive(); var url = currentSheet.getUrl(); Logger.log( url );

Docker stats all running containers

sudo docker stats $(sudo docker inspect -f "{{ .Name }}" $(sudo docker ps -q)) Shows live CPU usage of all running containers.

Disabling HTML Import caching

HTML Import caching will sometimes mean that changes made to HTML files that get imported do not get reflected upon browser refresh. Take the following import as an example: <link rel="import" href="./my-element.html"> If a change is done to my-element.html after previo...

Iterating over nodes

The NodeIterator interface provides methods for iterating over nodes in a DOM tree. Given a document like this one: <html> <body> <section class="main"> <ul> <li>List Item</li> <li>List Item</li> <li>Li...

Removing a class

Modern browsers provide a classList object to ease manipulation of the element's class attribute. Older browsers require direct manipulation of the element's className property. * Note class names are not stored in the element's property in any particular order W3C DOM4 Removing one class from an...

Testing for a class

Modern browsers provide a classList object to ease manipulation of the element's class attribute. Older browsers require direct manipulation of the element's className property. * Note class names are not stored in the element's property in any particular order W3C DOM4 Testing if an element cont...

Ellipse

To plot an ellipse you can use its equation. An ellipse has a major and a minor axis. Also we want to be able to plot the ellipse on different center points. Therefore we write a function whose inputs and outputs are: Inputs: r1,r2: major and minor axis respectively C: center of the ellip...

Working with columns containg NULL values

In MySQL and other SQL dialects, NULL values have special properties. Consider the following table containing job applicants, the companies they worked for, and the date they left the company. NULL indicates that an applicant still works at the company: CREATE TABLE example (`applicant_id` INT, `...

Optimizing Storage Layout for InnoDB Tables

In InnoDB, having a long PRIMARY KEY (either a single column with a lengthy value, or several columns that form a long composite value) wastes a lot of disk space. The primary key value for a row is duplicated in all the secondary index records that point to the same row. Create an AUTO_INCREME...

Safe reseeding

You may want to re-seed your database without affecting your previously created seeds. For this purpose, you can use firstOrCreate in your seeder: EmployeeType::firstOrCreate([ 'type' => 'manager', ]); Then you can seed the database: php artisan db:seed Later, if you want to add a...

Automatically reload vimrc upon save

To automatically reload vimrc upon save, add the following to your vimrc: if has('autocmd') " ignore this section if your vim does not support autocommands augroup reload_vimrc autocmd! autocmd! BufWritePost $MYVIMRC,$MYGVIMRC nested source % augroup END endif a...

Installing Ruby with RVM

The Ruby Version Manager is a command line tool to simply install and manage different versions of Ruby. rvm istall 2.3.1 for example installs Ruby version 2.3.1 on your machine. With rvm list you can see which versions are installed and which is actually set for use. user@dev:~$ rvm li...

Adding Siri Extension to App

To integrate Siri capabilities in your app, you should add an extensions as you would do while creating an iOS 10 Widget (old Today View Extension) or a custom keyboard. Adding capability 1- In the project settings, select your iOS app target and go to Capabilities tab 2- Enable the Siri capabili...
iOS • SiriKit

Create an empty dataset based on an existing dataset

Method 1: proc sql; create table foo like sashelp.class; quit; Method 2: proc sql; create table bar as select * from sashelp.class (obs=0); quit; Method 1 should be the preferred option

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