Tutorial by Examples: l

First, install ipset if needed. Please refer to your distribution to know how to do it. As an example, here is the command for Debian-like distributions. $ apt-get update $ apt-get install ipset Then create a configuration file to define an ipset containing the IPs for which you want to open ac...

Work in progress

Let's say we want to eliminate duplicated subsequence element from a string (it can be more than one). For example: 2,14,14,14,19 and convert it into: 2,14,19 Using gsub, we can achieve it: gsub("(\\d+)(,\\1)+","\\1", "2,14,14,14,19") [1] "2,14,19" ...

Gradle tasks can be written using Groovy code from inside a projects build.gradle file. These tasks can then be executed using > gradle [taskname] at the terminal or by executing the task from within an IDE such as Eclipse. To create the Hello World example in gradle we must define a task that w...

It is a common practice to name files using the date as prefix in the following format: YYYYMMDD, for example: 20170101_results.csv. A date in such string format can be verified using the following regular expression: \\d{4}(0[1-9]|1[012])(0[1-9]|[12][0-9]|3[01]) The above expression considers d...

iex(1)> [x, y] = ["String1", "String2"] iex(2)> "#{x} #{y}" # "String1 String2"

["String1", " ", "String2"] |> IO.iodata_to_binary # "String1 String2" This will gives some performances boosts as strings not duplicated in memory. Alternative method: iex(1)> IO.puts(["String1", " ", "String2"]) # ...

In android, every developer uses Anonymous Class (Runnable) at least once in a project. Any Anonymous Class has a reference to its parent (activity). If we perform a long-running task, the parent activity will not be destroyed until the task is ended. Example uses handler and Anonymous Runnable cla...

Abstract Class : package base; /* Abstract classes cannot be instantiated, but they can be subclassed */ public abstract class ClsVirusScanner { //With One Abstract method public abstract void fnStartScan(); protected void fnCheckForUpdateVersion(){ System....

Navigate to project's app module and create libs directory. Place your .aar file there. For example myLib.aar. Add the code below to android block of app level's build.gradle file. repositories { flatDir { dirs 'libs' } } This way you defined a new ext...

Sometimes you would want to start or remove an action on a specific node at a certain time. For example, you might want to stop a moving object when the user taps the screen. This becomes very helpful when a node has multiple actions and you only wants to access one of them. let move = SKAction.mov...

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/rest" ) func main() { config, err = rest.InClusterConfig() if err != nil { return nil, err } ...

Objectives: Using the Spring CLI, we will create a new Spring Boot application to be deployed to Elastic Beanstalk. We will edit the generated Spring Boot application so that it will: Create a jar named aws-eb-demo.jar. Listen on port 5000. Include a single web page named index.html. ...

Code echo get_permalink(); Output The link of the current page, for example: http://website.com/category/name-of-post/

Code echo get_permalink( 44 ); Output The link of the post id:44, for example: http://website.com/category/name-of-post/

Code echo get_permalink( 44 , false ); Output The link of the post id:44 without the name of the post, for example: http://website.com/category/%postname%/

To get OAuth2 access token simply do curl https://login.salesforce.com/services/oauth2/token -d "grant_type=password" -d "client_id=myclientid" -d "client_secret=myclientsecret" -d "[email protected]" -d "password=mypassword123456" Y...

Code $categories = get_the_category(); foreach( $categories as $category ) { echo $category->name . '<br />'; } Output All names of categories of the current page, one on each line.

Code $categories = get_the_category(); foreach( $categories as $category ) { echo $category->term_id . '<br />'; } Output All ids of categories of the current page, one on each line.

Before you can build anything, you are required to make your machine ready for building. For this you need to install a lot of libraries and modules. The most recommended Linux distribution is Ubuntu, so this example will focus on installing everything that is needed on Ubuntu. Installing Java Fir...