Tutorial by Examples: r

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A function can be forward declared, this is similar to specifications in a C header file. That way the compiler knows that a function will be made available later on. Without forward declarations the function MUST be declared before it's called in the code. The forward declaration consists of the...

/* This will popup a message-box saying "HELLO WORLD" */ FUNCTION cat RETURNS CHARACTER ( c AS CHARACTER, d AS CHARACTER): RETURN c + " " + d. END. MESSAGE cat("HELLO", "WORLD") VIEW-AS ALERT-BOX.

A function can have multiple return statements and they can be placed in different parts of the actual function. They all need to return the same data type though. FUNCTION returning DATE ( dat AS DATE): IF dat < TODAY THEN DO: DISPLAY "<". RETURN dat - 200. ...

A function can only return a single value but there's one way around that: the parameters are not limited to input parameters. You can declare INPUT, OUTPUT and INPUT-OUTPUT parameters. Unlike INPUT parameters you must specify OUTPUT or INPUT-OUTPUT before the parameters. Some coding conventions m...

For syncing all folders in both direction, insert this into your Vagrantfile config.vm.synced_folder "my-project1", "/home/vagrant/my-project1"

For syncing all folders in both direction, insert this into your Vagrantfile: config.vm.synced_folder "my-project1", "/home/vagrant/my-project1", type: "rsync", :rsync__exclude => ['my-project1/mini_project2/target,my-project1/mini_project2/target,my-project1/mini...

<%@ WebService Language="C#" Class="Util" %> using System; using System.Web.Services; public class Util: WebService { [WebMethod] public int CalculatorAdd(int operandA, int operandB) { return operandA + operandB; } [WebMethod] ...

const timeFormat = "15 Monday January 2006" func ParseDate(s string) (time.Time, error) { t, err := time.Parse(timeFormat, s) if err != nil { // time.Time{} returns January 1, year 1, 00:00:00.000000000 UTC // which according to the source code is the zero va...

TTL value can be used to decide for how long the document needs to be there in the bucket. By default TTL value is 0, which means it will be there for indefinite time period. String bucketName = "bucket"; List<String> nodes = Arrays.asList("node1","node2"); // I...

Below example shows ways to read and write csv file without any third party libraries. Write CSV public void writeToCsvFile(List<String[]> thingsToWrite, String separator, String fileName){ try (FileWriter writer = new FileWriter(fileName)){ for (String[] strings : thingsToWrit...

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function getCombinations(params, combinationsResults){ if(params.length == 0) return combinationsResults; var head = params[0]; var tail = params.slice(1); var combinationsResultsCurrent = []; if(Array.isArray(head)){ _.uniq(head).forEach(function(item){ ...

Firstly, you'll need to add the crate into your Cargo.toml file as a dependency. [dependencies] rand = "0.3" This will retrieve the rand crate from crates.io. Next, add this to your crate root. extern crate rand; As this example is going to provide a simple output through the term...

To generate characters, you can utilize the thread-local random number generator function, random. fn main() { let tuple = rand::random::<(f64, char)>(); println!("{:?}", tuple) } For occasional or singular requests, such as the one above, this is a reasonable efficien...

The procedures Create, Put_Line, Close from the package Ada.Text_IO is used to create and write to the file file.txt. with Ada.Text_IO; procedure Main is use Ada.Text_IO; F : File_Type; begin Create (F, Out_File, "file.txt"); Put_Line (F, "This string will be writ...

This example will provide basic web routing using Iron. To begin with, you will need to add the Iron dependency to your Cargo.toml file. [dependencies] iron = "0.4.*" We will use Iron's own Router library. For simplicity, the Iron project provides this library as part of the Iron cor...

To mock a protected member you must first include the following at the top of your test fixture: using Moq.Protected; You then call Protected() on your mock, after which you can use the generic Setup<> with the return type of your method. var mock = new Mock<MyClass>(); mock.Protec...

When using "controller as syntax" you would give your controller an alias in the html when using the ng-controller directive. <div ng-controller="MainCtrl as main"> </div> You can then access properties and methods from the main variable that represents our contr...

See recursion A function can call itself and thereby recurse. FUNCTION factorial INTEGER (num AS INTEGER). IF num = 1 THEN RETURN 1. ELSE RETURN num * factorial(num - 1). END FUNCTION. DISPLAY factorial(5). With standard settings (startup parameter) the Pro...