Tutorial by Examples: l

The normal Java classloaders look for classes first in the bootstrap classpath, before checking for extensions and the application classpath. By default, the bootstrap classpath consists of the "rt.jar" file and some other important JAR files that are supplied by the JRE installation. Th...

Unity networking provides the High Level API (HLA) to handle network communications abstracting from low level implementations. In this example we will see how to create a Server that can communicate with one or multiple clients. The HLA allows us to easily serialize a class and send objects of ...

Pre-requisites: cx_Oracle package - See here for all versions Oracle instant client - For Windows x64, Linux x64 Setup: Install the cx_Oracle package as: sudo rpm -i <YOUR_PACKAGE_FILENAME> Extract the Oracle instant client and set environment variables as: ORACLE_HOME=&...

Adding tags to "describe" or "it" blocks allows you to run only those examples with a given tag. Use the --tag (or -t) option to run examples that match a specified tag. The tag can be a simple name or a name:value pair. If a simple name is supplied, only examples with :name...

If you are adding new rows and updating existing data. You need two additional parameters: --check-column : A column name that should be checked for newly appended and updated data. date, time, datetime and timestamp are suitable data types for this column. --last-value : The last value that su...

Local variables - Those declared within a procedure (subroutine or function) of a class (or other structure). In this example, exampleLocalVariable is a local variable declared within ExampleFunction(): Public Class ExampleClass1 Public Function ExampleFunction() As Integer Dim exa...

SELECT IDENT_CURRENT('dbo.person'); This will select the most recently-added identity value on the selected table, regardless of connection or scope.

$ npm install -g parse-server mongodb-runner $ mongodb-runner start $ parse-server --appId APPLICATION_ID --masterKey MASTER_KEY --databaseURI mongodb://localhost/test You can use any arbitrary string as your application id and master key. These will be used by your clients to authenticate with...

'use strict'; const http = require('http'); const PORT = 8080; const server = http.createServer((request, response) => { let buffer = ''; request.on('data', chunk => { buffer += chunk; }); request.on('end', () => { const responseString = `Received string ${buffe...

file:write_file("myfile.txt", ["Hi " [<<"there">>], $\n]).

["Guten Tag " | [<<"Hello">>]]. [<<"Guten Tag ">> | [<<"Hello">>]]. [$G, $u, $t, $e, $n , $T, $a, $g | [<<"Hello">>]]. [71,117,116,101,110,84,97,103,<<"Hello">>].

Data_1 = [<<"Hello">>]. Data_2 = [Data_1,<<" Guten Tag ">>].

["Guten tag " | <<"Hello">>]. In the shell this will be printed as ["Guten tag "|<<"Hello">>] instead of ["Guten tag ",<<"Hello">>]. The pipe operator will create an improper list if the last element o...

Data = ["Guten tag ",<<"Hello">>], Len = iolist_size(Data), [<<Len:32>> | Data]. The size of an iolist can be calculated using the iolist_size/1. This snippet calculates the size of a message and creates and appends it to the front as a four byte bina...

<<"Guten tag, Hello">> = iolist_to_binary(["Guten tag, ",<<"Hello">>]). An IO list can be converted to a binary using the iolist_to_binary/1 function. If the data is going to be stored for a long period or sent as a message to other processes ...

The following example uses allow and receive to stub a Cart's call to a CreditCardService so that the example doesn't have to wait for a network call or use a credit card number that the processor knows about. class Cart def check_out begin transaction_id = CreditCardService.instance...

In greeter.rb (wherever that goes in your project): class Greeter def greet "Hello, world!" end end In spec/greeter_spec.rb: require_relative '../greeter.rb' RSpec.describe Greeter do describe '#greet' do it "says hello" do expect(Greeter.new.gr...

Clear the canvas using compositing operation. This will clear the canvas independent of transforms but is not as fast as clearRect(). ctx.globalCompositeOperation = 'copy'; anything drawn next will clear previous content.

Lazy, or irrefutable, patterns (denoted with the syntax ~pat) are patterns that always match, without even looking at the matched value. This means lazy patterns will match even bottom values. However, subsequent uses of variables bound in sub-patterns of an irrefutable pattern will force the patter...

CLISP has an integration with GNU Readline. For improvements for other implementations see: How to customize the SBCL REPL.