Tutorial by Examples: et

Going to its roots, Logstash has the ability to parse and store syslog data. This example shows a basic configuration that gets you to that. input { file { path => [ "/var/log/syslog", "/var/log/auth.log" ] type => "syslog" } }...

Always use Named Arguments to optional parameters, to avoid potential bugs when the method is modified. class Employee { public string Name { get; private set; } public string Title { get; set; } public Employee(string name = "<No Name>", string title = "&lt...

Detailed instructions on getting c#-4.0 set up or installed.

As of the C 2011 Standard, listed in §5.1.1.2 Translation Phases, the translation of source code to program image (e.g., the executable) are listed to occur in 8 ordered steps. The source file input is mapped to the source character set (if necessary). Trigraphs are replaced in this step. Contin...

Get a list of themes. $ wp theme list Install the latest version from wordpress.org and activate $ wp theme install twentysixteen --activate Install from a local zip file $ wp theme install ../my-theme.zip Install from a remote zip file $ wp theme install http://s3.amazonaws.com/bucketn...

You can customize the appearance of the TextInputLayout and its embedded EditTextby defining custom styles in your styles.xml. The defined styles can either be added as styles or themes to your TextInputLayout. Example for customizing the hint appearance: styles.xml: <!--Floating label text st...

To create a ResultSet you should to create a Statement or PrepapredStatement : Create ResultSet with Statement try { Class.forName(driver); Connection connection = DriverManager.getConnection( "jdbc:somedb://localhost/databasename", "username", "pass...

Go to Hardware -> Touch Pressure: To simulate a normal press, use Shift-Command-1 and a deep one, Shift-Command-2. If your MacBook has a Force Touch trackpad, you could use your trackpad force to simulate 3D / Force Touch.

Background fetch is a new mode that lets your app appear always up-to-date with the latest information while minimizing the impact on battery. You could download feeds within fixed time intervals with this capability. To get started: 1- Check Background Fetch in capabilities screen in Xcode. 2- I...

1- Run the app on a real device and attach it to Xcode debugger. 2- From Debug menu, select Simulate Background Fetch: 3- Now Xcode will pause the app with SIGSTOP signal. Just tap the continue button to let the app do the background fetch. Now you will see that data is fetched and ready for ...

Gradle (All Versions) When adding multiple third party plugins you do not need to separate them into different instances of the buildscript(All) or plugin(2.1+) code, new plug ins can be added alongside pre-existing plugins. buildscript { repositories { maven { url "https://plu...

Operation : Average Case (assumes parameters generated randomly) : Worst case x in s : O(1) Difference s - t : O(len(s)) Intersection s&t : O(min(len(s), len(t))) : O(len(s) * len(t) Multiple intersection s1&s2&s3&...&sn : : (n-1) * O(l) where l is max(len(s1),...,len(sn)) s...

When using d3.request() or one of the convenience constructors (d3.json, d3.csv, d3.tsv, d3.html and d3.xml) there are many sources for error. There may be problems with the issued request or its response due to network errors, or the parsing might fail if the content is not well-formed. Within the...

We can use command uname with various options to get complete details of running kernel. uname -a Linux df1-ws-5084 4.4.0-64-generic #85-Ubuntu SMP Mon Feb 20 11:50:30 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux As per man page here few more options Usage: uname [OPTION]... Print certain system inf...

Code function add_the_theme_page(){ add_menu_page('Theme page title', 'Theme menu label', 'manage_options', 'theme-options', 'page_content', 'dashicons-book-alt'); } add_action('admin_menu', 'add_the_theme_page'); function page_content(){ echo '<div class="wrap"><h2&...

Code <p><?php echo esc_html( sprintf( __( 'Character set: %s', 'textdomain' ), get_option( 'blog_charset' ) ) ); ?></p> Output Character set: UTF-8

library(tidyr) ## example data df <- read.table(text =" numbers firstName secondName 1 1 1.5862639 0.4087477 2 2 0.1499581 0.9963923 3 3 0.4117353 0.3740009 4 4 -0.4926862 0.4437916", header = T) df # numbers firstName secondName # 1 ...

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...

The typeid keyword is a unary operator that yields run-time type information about its operand if the operand's type is a polymorphic class type. It returns an lvalue of type const std::type_info. Top-level cv-qualification are ignored. struct Base { virtual ~Base() = default; }; struct Deri...

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....