Tutorial by Examples: bac

Using Shortcodes in WordPress Backend

[footag foo="value of 1" attribute-2="value of 2"] In wordpress admin we use pre defined shortcodes by writing the shortcode name inside square brackets and optionally adding attributes to it separating by space.

WordPress • Shortcode

ActionMailer Callbacks

ActionMailer supports three callbacks before_action after_action around_action Provide these in your Mailer class class UserMailer < ApplicationMailer after_action :set_delivery_options, :prevent_delivery_to_guests, :set_business_headers Then create these methods under the private ...

Ruby on Rails • ActionMailer

HTML Fallback

For browsers that do not support the progress element, you can use this as a workaround. <progress max="100" value="20"> <div class="progress-bar"> <span style="width: 20%;">Progress: 20%</span> </div> </pr...

HTML • Progress Element

Animation with callback

Sometimes we need to change words position from one place to another or reduce size of the words and change the color of words automatically to improve the attraction of our website or web apps. JQuery helps a lot with this concept using fadeIn(), hide(), slideDown() but its functionality are limite...

jQuery • jQuery .animate() Method

Example of BackAndroid along with Navigator

This is an example on how to use React Native's BackAndroid along with the Navigator. componentWillMount registers an event listener to handle the taps on the back button. It checks if there is another view in the history stack, and if there is one, it goes back -otherwise it keeps the default beha...

react-native • Android - Hardware Back Button

Set a darker or lighter shade of the background color for another property

Darken #demo { @refcolor: #f0b9b8; background: @refcolor; border: 1px solid darken(@refcolor, 25%); } The above code makes use of the darken() function to set the border color as a shade that is 25% darker than the reference color (which is also the background color). Less compiler ca...

less • Color Operation Functions

Enable backup compression default

Exec sp_configure 'backup compression default',1 GO RECONFIGURE;

Microsoft SQL Server • Advanced options

Run command in background

$ sleep 500 & [1] 7582 Puts the sleep command in background. 7582 is the process id of the background process.

Bash • Job Control

List background processes

$ jobs [1] Running sleep 500 & (wd: ~) [2]- Running sleep 600 & (wd: ~) [3]+ Running ./Fritzing & First field shows the job ids. The + and - sign that follows the job id for two jobs denote the default job and next candidate def...

Bash • Job Control

Bring a background process to the foreground

$ fg %2 sleep 600 %2 specifies job no. 2. If fg is used without any arguments if brings the last process put in background to the foreground. $ fg %?sle sleep 500 ?sle refers to the baground process command containing "sle". If multiple background commands contain the string, it w...

Bash • Job Control

Restart stopped background process

$ bg [8]+ sleep 600 &

Bash • Job Control

Backticks usage

There are many examples where backticks are used inside a query but for many it's still unclear when or where to use backticks ``. Backticks are mainly used to prevent an error called "MySQL reserved word". When making a table in PHPmyAdmin you are sometimes faced with a warning or alert ...

MySQL • Backticks

More complicated Gui example with multiple listviews using the same event callback function

This script demonstrates how to receive complicated GUI events from different controls in the same event callback function. We'll be using two ListView controls for that. Now every time an action is detected on one of those ListView controls, we want a precise description of what happened and have ...

AutoHotkey • Use functions instead of labels

Passing data back to the event source

Using parameters passed by reference An event may define a ByRef parameter meant to be returned to the caller: Public Event BeforeSomething(ByRef cancel As Boolean) Public Event AfterSomething() Public Sub DoSomething() Dim cancel As Boolean RaiseEvent BeforeSomething(cancel) If...

VBA • Events

Retrieve information on backup and restore operations

To get the list of all backup operations performed on the current database instance: SELECT sdb.Name AS DatabaseName, COALESCE(CONVERT(VARCHAR(50), bus.backup_finish_date, 120),'-') AS LastBackUpDateTime FROM sys.sysdatabases sdb LEFT OUTER JOIN msdb.dbo.backupset bus ON bus.database_nam...

Microsoft SQL Server • Retrieve information about the database

Background images

Full width table cell background images <html xmlns:v="urn:schemas-microsoft-com:vml"> <head> <style> v:* { behavior: url(#default#VML); display: inline-block; } </style> </head> <body> <center> <...

email • HTML email composition and Outlook intricacies

Execute code on the UI thread after performing background work

This example shows how to update a UI component from a background thread by using a SynchronizationContext void Button_Click(object sender, EventArgs args) { SynchronizationContext context = SynchronizationContext.Current; Task.Run(() => { for(int i = 0; i < 10; i++) ...

.NET Framework • Synchronization Contexts

Passing connection to subreport; return values back to the master report

This is a snippet of master report. Two parameters and the connection (for example, jdbc) are passing to the subreport. One value is returned from the subreport back to the master report, this value (variable) can be used in master report <subreport> <reportElement x="0" y=&...

jasper-reports • Using subreports

Disowning background job

$ gzip extremelylargefile.txt & $ bg $ disown %1 This allows a long running process to continue once your shell (terminal, ssh, etc) is closed.

Bash • Jobs and Processes

Using Segues to navigate backwards in the navigation stack

Unwind Segues Unwind Segues give you a way to “unwind” the navigation stack and specify a destination to go back to. The signature of this function is key to Interface Builder recognizing it. It must have a return value of IBAction and take one parameter of UIStoryboardSegue. The name of the ...

iOS • Segues