Tutorial by Examples: le

Including LaTeX Preample Commands

There are two possible ways of including LaTeX preamble commands (e.g. \usepackage) in a RMarkdown document. 1. Using the YAML option header-includes: --- title: "Including LaTeX Preample Commands in RMarkdown" header-includes: - \renewcommand{\familydefault}{cmss} - \usepacka...

R Language • Creating reports with RMarkdown

A simple authentication POST request with Jsoup

A simple POST request with authentication data is demonstrated below, note that the username and password field will vary depending on the website: final String USER_AGENT = "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36"; ...

Jsoup • Logging into websites with Jsoup

Structure of a Simple ASP Page

<%@ Language="VBScript" CodePage = 65001 %> <% Option Explicit Response.Charset = "UTF-8" Response.CodePage = 65001 %> <!doctype html> <html> <head> <title>My First Classic ASP Page</title> </head> <body&gt...

asp-classic • Getting started with asp-classic

@CompileStatic

Enables a code to be statically compiled. Its bytecode will be closer to Java's, thus having better performance, though some dynamic features won't be available. @groovy.transform.CompileStatic class ListMath { def countSize(List<String> strings) { strings.collect { it.size() }...

groovy • AST Transformations

Enable streaming from flask

Flask has that feature which lets you stream data from a view by using generators. Let's change the app.py file add from flask import Response add from datetime import datetime add from time import sleep create a new view: @app.route("/time/") def time(): def streamer(): ...

Flask • Deploying Flask application using uWSGI web server with Nginx

Simple self type example

Self types can be used in traits and classes to define constraints on the concrete classes it is mixed to. It is also possible to use a different identifier for the this using this syntax (useful when outer object has to be referenced from an inner object). Assume you want to store some objects. Fo...

Scala Language • Self types

Reads file (/etc/passwd) line by line and field by field

#!/bin/bash FILENAME="/etc/passwd" while IFS=: read -r username password userid groupid comment homedir cmdshell do echo "$username, $userid, $comment $homedir" done < $FILENAME In unix password file, user information is stored line by line, each line consisting of i...

Bash • Read a file (data stream, variable) line-by-line (and/or field-by-field)?

Adding a UIRefreshControl to a TableView

Assumptions: TableView - reference to the TableView DataSource - is a class which inherits UITableViewSource DataSource.Objects - is a public List< object >(), accessible to the UIViewController private UIRefreshControl refreshControl; public override void ViewDidLoad() { base.V...

Xamarin.iOS • Adding UIRefreshControl to a table view

Collection Initializer

Arrays Dim names = {"Foo", "Bar"} ' Inferred as String() Dim numbers = {1, 5, 42} ' Inferred as Integer() Containers (List(Of T), Dictionary(Of TKey, TValue), etc.) Dim names As New List(Of String) From { "Foo", "Bar" '... ...

Visual Basic .NET Language • Introduction to Syntax

Simple for loop

A for loop iterates from the starting value to the ending value inclusive. program SimpleForLoop; {$APPTYPE CONSOLE} var i : Integer; begin for i := 1 to 10 do WriteLn(i); end. Output: 1 2 3 4 5 6 7 8 9 10

Embarcadero Delphi • For Loops

Waiting For Ajax Requests to Complete

C# using OpenQA.Selenium using OpenQA.Selenium.Chrome; using System.Threading; namespace WebDriver Tests { class WebDriverWaits { static void Main() { IWebDriver driver = new ChromeDriver(@"C:\WebDriver"); driver.Na...

selenium-webdriver • Wait

Detecting when UIScrollView finished scrolling with delegate methods

scrollViewDidEndDecelerating: this tells the delegate that the scroll view has ended decelerating the scrolling movement. Objective C: - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView { [self stoppedScrolling]; } - (void)scrollViewDidEndDragging:(UIScrollView *)scrollView w...

iOS • UIScrollView

Multiple Routes

The main app file loads any routes files in which you would like to define routes. To do so we need the following directory structure: app.js routes/index.js routes/users.js app.js var express = require('express'); var app = express(); app.use('/', require('./routes/index')); app.use('/us...

express • Routing

Get time cycle type (12-hour or 24-hour)

Checking whether the current date contains the symbol for AM or PM Objective-C NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; [formatter setLocale:[NSLocale currentLocale]]; [formatter setDateStyle:NSDateFormatterNoStyle]; [formatter setTimeStyle:NSDateFormatterShortStyle]; NSStr...

iOS • NSDate

Universal Module Definition (UMD)

The UMD (Universal Module Definition) pattern is used when our module needs to be imported by a number of different module loaders (e.g. AMD, CommonJS). The pattern itself consists of two parts: An IIFE (Immediately-Invoked Function Expression) that checks for the module loader that is being i...

JavaScript • Modularization Techniques

Asynchronous Module Definition (AMD)

AMD is a module definition system that attempts to address some of the common issues with other systems like CommonJS and anonymous closures. AMD addresses these issues by: Registering the factory function by calling define(), instead of immediately executing it Passing dependencies as an array...