Ruby Interactive Tutorial

We would recommend you to go through the following topics first and then proceed further − Interactive Ruby. org free interactive C tutorial. I am sure you have a different opinion about the complexity of each tutorial however advanced hacker is going to be calling this a job of script kiddie (beginner hacker). There are a number of clients for RabbitMQ in many different languages. In this course, you learn all about Ethical hacking with loads of live hacking examples to make the subject matter clear. Hello! I am starting a new series with special guests. This text only deals with dynamic web page creation with PHP, though PHP is not only capable of creating web pages. The official Oracle Java Tutorials; University of Helsinki MOOC Object Oriented. If the test expression evaluates to the constant false or nil, the test is false; otherwise, it is true. Good luck!. Interactive Ruby or irb is an interactive programming environment that comes with Ruby. The tutorial needs to run at least for a full day(*): typically half day for TXM tools fundamentals and half day for main corpus formats fundamentals (TXT and XML) and input procedures into the platform. There is no need to download anything - Just click on the chapter you wish to begin from, and follow the instructions. Well, that was easy. Video tutorials: N/A; Books and tutorials (online): Why's (Poignant) Guide to Ruby. rb", although interactive Ruby files do not have an extension of ". We’ll check your code, give you hints along the way, and support you as you learn. Click here to read about the trends shaping this year’s Top Programming Languages. What Is the AWS Command Line Interface? The AWS Command Line Interface (AWS CLI) is an open source tool that enables you to interact with AWS services using commands in your command-line shell. Design simple views for each state in your application, and React will efficiently update and render just the right components when your data changes. Please subscribe to the RSS feed to keep up-to-date with all Selenium development and community activity! Don't forget to follow us on Twitter too! Selenium IDE Is Dead, Long Live Selenium IDE! - Mon, 06 Aug 2018; Firefox 55 and Selenium IDE - Wed, 09 Aug 2017. 3rd edition. Note: This is a different repository to the one used in the Build a Node. Well, that was easy. We found that English is the preferred language on Ruby Monk pages. Mastering Redmine is a comprehensive guide with tips, tricks and best practices for using Redmine. This brings up the "interactive Ruby shell", which gives you a back-and-forth session with Ruby inside your Terminal. io/c/1291657/431340/7490 Installation of software - Ruby and Aptana studio. Whether you are an experienced programmer or not, this website is intended for everyone who wishes to learn the C# programming language. We’ve started this series of tutorials to help QA and Test Automation Engineers. Ruby Falls Timed Ticket - Select the date/time of your visit from the ticketing calendar; Incline Railway - Valid for admission on any day to Incline Railway; Adults: $56. This tutorial explains how to use FileZilla to upload your website. With more and more software being required to support multiple languages, or even just any language, Unicode has been strongly gaining popularity in recent years. After learning the basics of programming and web development, you're ready to learn Ruby on Rails itself. rb file from interactive ruby : Ruby code can be placed in a file with “. No Ruby? No Problem. Linear regression probably is the most familiar technique in data analysis, but its application is often hamstrung by model assumptions. Whether you are an experienced programmer or not, this website is intended for everyone who wishes to learn the Scala programming language. if var == 10 print “Variable is 10” end. In this tutorial, you'll use string methods to determine the length of a string, index and split strings to extract substrings, add and remove whitespace and other characters, change the case of characters in strings, and find and replace text. The purpose of this series of tutorials is to give the people who read them a head start in making their own game with RPG Maker. The official Ruby site, which has tons of useful online manuals and tutorials. In Ruby, methods look like this: def methodname # method code here end The def keyword is the header of the method. I want make interactive application where user launches it and can do various task by typing commands (some kind of shell) example:. Ruby Tutorial By Satish Talim. The ruby class optparse. io tells you which is the best one. Go check that out instead!. Gnuplot is a portable command-line driven graphing utility for Linux, OS/2, MS Windows, OSX, VMS, and many other platforms. Although these repositories. FREE Online Selenium Tutorial for beginners in Java - Learn Selenium WebDriver automation step by step hands-on practical examples. As leaders in online education and learning to code, we've taught over 45 million people using a tested curriculum and an interactive learning environment. This reference guide is marked up using AsciiDoc from which the finished guide is generated as part of the 'site' build target. if var == 10 print “Variable is 10” end. I am back with lots of news and articles! I've been quite busy but I returned. Ruby strings have many built-in methods that make it easy to modify and manipulate text, a common task in many programs. Individual applications are expected to implement their own parameter binding. Whether you’ve had any prior programming experience or not, the tutorials on this site will walk you through all the steps to write, compile, and debug your C++ programs, all with plenty of examples. ~ Gilbert Grosvenor, Founding Editor of National Geographic. This page contains a handy XPath test-bed ideal for experimenting with XPath without having to write lots of code. The Java Tutorials have been written for JDK 8. One of the easiest ways to do this is to use something called IRB, which stands for Interactive Ruby. Finishing the exercise correctly must be accomplished using the new feature that you are explaining. The purpose of this guide is to teach the bare essentials — just enough to get started. The Ruby project type supports Ruby files, RSpec specification files, and YAML files. Please keep submissions on topic and of high quality. Ruby regular expressions (ruby regex for short) help you find specific patterns inside strings, with the intent of extracting data for further processing. Install CocoaPods. js community's reviews & comments. puts "Hello, World!" To run Ruby scripts on the web, you need to use a special server, run through (F)CGI, or do some other stuff; there are several ways to get different languages HTTP-accessible. SSH (or "Secure Shell") is a network protocol that allows you to exchange data with a remote host over an encrypted channel. Detailed tutorial on Minimum Spanning Tree to improve your understanding of Algorithms. Check out MacBook Pro, iMac Pro, MacBook Air, iMac, and more. Concise and readable, it is easy to pick up but also plenty powerful. Free, interactive tutorials to help you. Ruby on Rails has been popularizing both concepts along with a variety of other controversial points since the beginning. Ruby Tutorial: SQL Query to Console i. The website takes the same approach used on the popular Try Ruby website. It doesn't take much code to handle message menus in Python and Flask. MySQL Tutorial for Database Administrators. It’s a tutorial that…yes, that teaches you how to procedurally generate caves. Basic PostgreSQL Tutorial. Also, don't tell anyone, but sometimes I use it as a calculator. This page contains a handy XPath test-bed ideal for experimenting with XPath without having to write lots of code. Here is an example of how to build a list. Ruby has dynamically typed language, it does not have hard rules and it is a high-level language that resembles the English language to a great extent. 10 Google Chrome Keyboard Shortcuts. Azure Storage includes Azure Blobs (objects), Azure Data Lake Storage Gen2, Azure Files, Azure Queues, and Azure Tables. The shebang line is ignored by Ruby – since the line begins with a hash, Ruby treats the line as a comment. Learn HTML provides an interactive tutorial that explains how to build HTML & CSS websites step by step. A newsfeed shows the activities from the people you follow. I'm new to Ruby development. The Ruby Programming Language by David Flanagan, Yukihiro Matsumoto aka “Matz,” the creator of. Fullstack GraphQL Tutorial to go from zero to production covering all basics and advanced concepts. Ruby can control the execution of code using Conditional branches. Such techniques include string substitution, multiplication and insertion. org free interactive Ruby tutorial. Please try to use a mirror that is near you. IRB, short for Interactive Ruby, is a REPL (read-eval-print loop) which serves as a quick way to explore the Ruby programming language and try out code without creating a file. Learn Ruby on Rails with our Wikitechy. Note: If you are new to Google Cloud Platform or Cloud Pub/Sub, you may wish to begin with the Quickstarts. The element must always be contained within a element. This article will walk you through using a Python language library to develop a simple chatbot that determines the value and responds to user input. The Go programming language is an open source project to make programmers more productive. Ruby Tutorial for Beginners : IRB What is a variable ? A variable is a piece of data that point to a specific name. Start Learning at Treehouse also has extensive interactive tutorials for Javascript. We would recommend you to go through the following topics first and then proceed further − Interactive Ruby. What Is the AWS Command Line Interface? The AWS Command Line Interface (AWS CLI) is an open source tool that enables you to interact with AWS services using commands in your command-line shell. cmd /K ruby "$(FULL_CURRENT_PATH)" Click on the Save… button to save this as a custom command. Rubygame is a cross-platform multimedia library for the most wonderful programming language in the world: Ruby. By covering the design aspects of a Rails web application, it makes it easier to understand the concepts behind Rails and how they fit together. In Ruby everything is an object. It is a very simple, friendly and easy to use programming language. It's suitable for small scripts as well as large applications. In the next chapter we will look at Looping with for and the Ruby Looping Methods. The source for this guide can be found in the _src/main/asciidoc directory of the HBase source. Don’t miss it! New Ruby Programming Tutorial section. Some of these programs may not be new in that they weren’t As 2016 comes to a close, it is time to bring you the best 10 Free and Open Source Software (FOSS) programs I have come across during. This page contains a handy XPath test-bed ideal for experimenting with XPath without having to write lots of code. All of them are interactive, and many are pannable and zoomable. As you can see in the above screen, we can write ruby expressions and statements. 2 ) Tutorial Bower bower install angular-ui-grid. Ruby is a general-purpose language that is still popular and in high demand in the marketplace, as it’s more commonly used in Rails applications. Methods are reuseable sections of code that perform specific tasks in our program. However, majority of Ruby IDEs are actually not strictly limited to just Ruby. Guidelines. Exercise ----- Here you will need to write the purpose of the exercise. Methods form the object's interface with the outside world; the buttons on the front of your television set, for example, are the interface between you and the electrical wiring on the other side of its plastic casing. Let start with following courses to learn Elixir. It provides course content in the form of chapters. Whether you are an experienced programmer or not, this website is intended for everyone who wishes to learn the Ruby programming language. 3 (as of January 2017), but any Python 2. Keep up to date with Rails on Twitter and This Week in Rails. Free, interactive tutorials to help you discover Ruby idioms, in your browser!. QUILTsocial is a daily quilting blog, monthly newsletter, FREE quarterly magazine, and FREE App focused on the love and art of making quilts. Tutorial 1: Learn Selenium Webdriver Basics. The Ruby Programming Language by David Flanagan, Yukihiro Matsumoto aka “Matz,” the creator of. Teach courses by Code. SSH (or "Secure Shell") is a network protocol that allows you to exchange data with a remote host over an encrypted channel. Graphinity: Graphing in Depth A Ruby graphing and analysis program, recently rewritten. Free, interactive tutorials to help you discover Ruby idioms, in your browser!. rb where foo. Document your code. Online Ruby Compiler, Online Ruby Editor, Online Ruby IDE, Ruby Coding Online, Practice Ruby Online, Execute Ruby Online, Compile Ruby Online, Run Ruby Online, Online Ruby Interpreter, Execute Ruby Online (Ruby v2. Over five million people in more than 180 countries have used Python Tutor to visualize over 100 million pieces of code, often as a supplement to textbooks, lectures, and online tutorials. Unite Learn about Shopify’s partner and developer conference. Interactive whiteboards use different types of positional systems to determine the position of the characters written on the board and to store them. The Ruby on Rails Tutorial is designed to give you a thorough introduction to web application development, including a basic grounding in Ruby, Rails, HTML & CSS, databases, version control, testing, and deployment—sufficient to launch you on a career as a web developer or technology entrepreneur. Right now Im doing some Tutorials and books. This tool comes along with Ruby installation so you have nothing to do extra to have IRb working. Welcome to the Visual Basic tutorial. rb" extension using interactive ruby editor as shown below : Executing the. 1 on page 518. Leverage your new skills to become a future Ruby on Rails Developer!. Python Programming tutorials from beginner to advanced on a massive variety of topics. This Linux tutorial is divided into 13 sections. For reference material, please look at the perl documentation, either online or using the perldoc command (try perldoc perlintro). Here is an example of how to build a list. CALCIATORI EDIS 1971-72 SCHEDA CATANZARO Q. Unicode Regular Expressions. Learn HTML provides an interactive tutorial that explains how to build HTML & CSS websites step by step. With Amazon Web Services, you can get your website up and running quickly. rb file from command prompt : 1. Refer topic Object Serialization later on. Ruby - Interactive Ruby. 0-ce of Docker. 5*PP= B F+ K '7 3q& 9 ;G È. Now we actually want to make a query and use it. Access 2000 free online courses from 140 leading institutions worldwide. This tutorial has been deprecated in favor of the Book, which is available free online and in dead tree form. Programming Ruby 1. When someone says. Ruby Koans is a great interactive tutorial for learning Ruby, which you can download at rubykoans. MakeUseOf is your guide in modern tech. FileZilla is a powerful and free software for transferring files over the Internet. js community's reviews & comments. Skip to content. If that module is in a separate file, you must use require to drag that file in before using include. org interactive JavaScript tutorial. The Vigenère Cipher Encryption and Decryption. In this tutorial, you'll use string methods to determine the length of a string, index and split strings to extract substrings, add and remove whitespace and other characters, change the case of characters in strings, and find and replace text. You can buy it online. Postgresql Dba Tutorial. We’ve started this series of tutorials to help QA and Test Automation Engineers. Ruby examples (example source code) Organized by topic. Enroll in free interactive courses to develop your Shopify expertise. In Ruby, just like in real life, our world is filled with objects. Before deploying your site to Heroku you will need to store your code in the Git version control system which was installed for you as part of the Heroku CLI. The HTML Ruby Text () element specifies the ruby text component of a ruby annotation, which is used to provide pronunciation, translation, or transliteration information for East Asian typography. COMPLETA ORIG. It makes the assumption that you already have Ruby installed. js to handle message menu interactions. For information on running previous versions of Rails on Heroku, see the tutorial for Rails 4. Being able to type pure Ruby into the console is invaluable. SAP SuccessFactors Integration Guides and Tutorials A list of guides and tutorials for connecting to and working with live SAP SuccessFactors data. Whether you are an experienced programmer or not, this website is intended for everyone who wishes to learn the JavaScript programming language. Companies like Twitter, Soundcloud, Goodreads, and Kickstarter got their products off the ground with Ruby. Interactive Shell; Syntax Checker; Perl Dev Kit;. Variables and Types. Unite Learn about Shopify’s partner and developer conference. By laying out a simple website structure, you can change any element easily in no time. Also, Ruby is an object-oriented language so you'll see how the language uses objects and classes to organize information. This is a small Ruby tutorial that should take no more than 20 minutes to complete. This brings up the "interactive Ruby shell", which gives you a back-and-forth session with Ruby inside your Terminal. Go by Example. It got great feedback so Tiffany dec…. All video and text tutorials are free. If the test expression evaluates to the constant false or nil, the test is false; otherwise, it is true. A tutorial on Perl character sequences, including newline, tab, carriage return, and other character sequences (escape sequences). Learn by Doing: The 8 Best Interactive Coding Websites. org free interactive Perl tutorial. And Ruby is a great language for beginners as well as professionals. Update your system. $ git commit -m "Initial static site template app". Interactagram. The Complete C# Tutorial. This single sign-on (SSO) login standard has significant advantages over logging in using a username/password:. INTERACTIVE BROKERS CANADA INC. Take advantage of SwiftUI, an all-new user interface framework with a declarative Swift syntax. Design simple views for each state in your application, and React will efficiently update and render just the right components when your data changes. Specializing in RECON/OSINT, Application and IoT Security, and Security Program Design, he has 20 years of experience helping companies from early-stage startups to the Global 100. Interactive Shell; Syntax Checker; Perl Dev Kit;. Ruby Programming Guide. org is a free interactive Python tutorial for people who want to learn Python, fast. Get coding in Python with a tutorial on building a modern web app. Find the best online courses & tutorials recommended by the Programming community. it gives you an instant IDE to learn, build, collaborate, and host all in one place. Today, we'll look at why you might want to use Ruby, as well as. com, the home of Blaze, PAW Patrol, Shimmer & Shine, and more of your preschooler's favorite shows! Kids can watch videos, play games, and interact with their Nick Jr. Visual Studio Code is free and available on your favorite platform - Linux, macOS, and Windows. For instance x=a+b where a and b can take many different values. In this guide we’ll dive in and use STOMP messaging with Spring to create an interactive web application. There are two major Python versions, Python 2 and. This tutorial is suitable for both beginners and experienced programmers. Your daily source for all things TV, movies, and games, including Star Wars, Fallout, Marvel, DC and more. Please try to use a mirror that is near you. Also, don't tell anyone, but sometimes I use it as a calculator. Try it with Chewbacca! LEARN AND TEACH REACT NATIVE. Whether you are an experienced programmer or not, this website is intended for everyone who wishes to learn the JavaScript programming language. He loves architecting and writing top-notch code. Ruby Bridges: A Simple Act of Courage. Type the command as ruby [file path] to get the output as shown below. Is there any similar tutorial for learning Python?. 0, which is the Python client recommended by. It is also called irb. Hey Guys, Im very new to ruby and programming in general. 0 (4th edition) The Pragmatic Programmers' Guide by Dave Thomas, with Chad Fowler and Andy Hunt. For this guide you will need: Basic familiarity with Ruby/Rails and Git. If you already know web development, this. UI Grid v4. In preious post, we saw various steps involved. Welcome to Ruby on Rails Essential Training. Wondering why you should use RVM? For a start, not only does RVM make installing multiple ruby interpreters / runtimes easy and consistent, it provides features such as gemsets that aren't typically supported out of the box on most ruby installs. Beautiful! The String#chomp method gives you back the string, but without the terminating newline. ("inf-ruby. This tutorial teaches you how to deploy node. I want make interactive application where user launches it and can do various task by typing commands (some kind of shell) example:. If you run the wrong input, you will get a scolding from the Master. Fullstack GraphQL Tutorial to go from zero to production covering all basics and advanced concepts. Make prepared statement status thread and instance-specific. A walkthrough guide of building an onboarding bot with Python SDK. Whether you are an experienced programmer or not, this website is intended for everyone who wishes to learn programming with Unix/Linux shell interpreters. CloudFront. This tutorial uses AMQP 0-9-1, which is an open, general-purpose protocol for messaging. 4) The RubyInstaller Development Kit is a toolkit that makes it easy to build and use native C/C++ extensions such as RDiscount and Nokogiri for Ruby on Windows. Well, that was easy. The Veteran Noob. Some of these programs may not be new in that they weren’t As 2016 comes to a close, it is time to bring you the best 10 Free and Open Source Software (FOSS) programs I have come across during. Stop wasting time setting up a development environment. 301 Moved Permanently. BG Admin Portal Tutorial. Ruby on Rails Tutorial Learn Web Development with Rails Michael Hartl. Help to translate the content of this tutorial to your language!. Ruby Tutorial By Satish Talim. From quick design models to fully detailed and photorealistic scenes, V-Ray 3 is designed to be SketchUp’s most powerful rendering solution. The AdWords API relies on SOAP and WSDL technologies to offer its services. Teach courses by Code. 3+ OpenGL tutorials with clear examples. Tabulator is a jQuery plugin used to dynamically generate interactive, extensible tables from either HTML, a JavaScript array, an Ajax data source, or JSON data. A newsfeed shows the activities from the people you follow. After completing this curriculum you'll be able to read, understand, and write basic Ruby code yourself:. Variables tell the computer program where the data is located in memory. The abbreviation irb comes from the filename exte. Python Programming tutorials from beginner to advanced on a massive variety of topics. There is no need to download anything, just click on the chapter you wish to begin from, and follow the instructions. This tutorial is primarily for new users of this great technology, and we recommend you to go through all the chapters, to get the most out of it as possible. Advent of Code (log in) My programs (log in) Public links. Learning is very easy with the interactive tutorials and live previews. This guide was written by Aidan Feldman. for beginners and professionals. org is a free interactive PHP tutorial for people who want to learn PHP, fast. chmod to denote the class method chmod of class File, and File#chmod to denote the instance method that has the same name. Your valuable input will help us improve this site please give your comments. org free interactive SQL tutorial. There is no need to download anything - just click on the chapter you wish to begin from, and follow the instructions. For information about the Ruby Subversion and Git repositories, see our Ruby Core page. Interactive Ruby Shell (IRB or irb) is a REPL for programming in the object-oriented scripting language Ruby. org is a free interactive Python tutorial for people who want to learn Python, fast. Say hello to Rubygame. and many other interesting stuff. Learn interactive Ruby, shell scripting, and beginning web development—useful standalone skills that are also the perfect preparation for the Ruby on Rails Tutorial. Your daily source for all things TV, movies, and games, including Star Wars, Fallout, Marvel, DC and more. To run the examples you'll need an API key. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. This tutorial is primarily for new users of this great technology, and we recommend you to go through all the chapters, to get the most out of it as possible. Ruby is a great place to start learning programming or web development. All MySQL administration tutorials presented in this section are practical and widely used in enterprise environments. Ruby Projects. PHP Tutorials for Beginners - Learn how to create a dynamic and interactive website using the PHP 7 programming language in simple and easy steps. A fun, interactive comparison of programming language verbosity Thomas Roca Azure , Blog Posts , Flask , Highcharts , Python , Tutorials 1 comments If you want to start a flame war among developers, all you need to do is start a discussion about what programming language is “best”. Git is easy to learn and has a tiny footprint with lightning fast performance. Setting up your working environment and using it effectively is the first step toward becoming a productive Ruby programmer. Register to continue. Hello, World! Introduction. Perl escape sequences: Newline, tab, and other special characters | alvinalexander. How to Install. I will assume that you will already have Ruby or JRuby installed. Typically a tutorial has several sections, each of which has a sequence of steps. com, the home of Blaze, PAW Patrol, Shimmer & Shine, and more of your preschooler's favorite shows! Kids can watch videos, play games, and interact with their Nick Jr. Tutorial Code ----- Write a code block that will appear on the interpreter window. Search for the Best Programming and Testing Tutorials on various topics – Python, Selenium, Java, AngularJS Tutorials, Manual & Automation Testing, C/C++, J2EE/Spring MVC, ANT, Maven, JUnit, TestNG, terminal commands (Linux/OS X). I am sure you have a different opinion about the complexity of each tutorial however advanced hacker is going to be calling this a job of script kiddie (beginner hacker). It will help you learn Java more quickly because you will get a feel for how programs are written, and best of all, you will make mistakes!. By popular demand, Digital Media Minute has a brand new, maintained list of 11 12 more-recent tutorials on both Ruby the language and Rails the framework. Use the Ruby Platform manager to choose between executing projects using JRuby, or any other native Ruby interpreter on your system. Eloquent JavaScript. Even if you do not print it, some people use the pdf version online, preferring its formatting to the formatting in the html version. Also, I will also work to provide regular updates as to my recovery progress. Like Smalltalk, everything in Ruby is an object, and Ruby has blocks, iterators, meta-classes and other good stuff. Two common use cases for regular expressions include validation & parsing. Interactive Ruby Ruby comes with a program that will show the results of any Ruby statements you feed it. Ruby proc tutorial In this section, we are going to examine the Proc module in Ruby. Ruby interactive interpreter We can run Ruby statements in a script or in an interactive interpreter. Accessing a *. I have listed down all the important points you need to remember after you have completed the following topics: Arrays, Ranges, Symbols, Hashes, Random Numbers, Read/Write Text Files. The purpose of this guide is to teach the bare essentials — just enough to get started. After having spent the past twenty years programming solutions on the server side, I find this 3D book a welcome diversion that offers new concepts and ideas with instant visual feedback!. 0: Jupyter’s Next-Generation Notebook Interface JupyterLab is a web-based interactive development environment for Jupyter notebooks, code, and data. It is regarded as an intermediate-level language, as it comprises both high-level and low-level language features. Our gallery provides a variety of charts designed to address your data visualization needs. org free interactive Ruby tutorial. See the section titled What can PHP do for more information. All video and text tutorials are free. Operators: = Simple assignment - assigns values from right side operands and operators to left side operand. Visual Studio Code is a code editor redefined and optimized for building and debugging modern web and cloud applications. There is no need to download anything - Just click on the chapter you wish to begin from, and follow the instructions. Trying something yourself and seeing what it does can be a. Hey, Ruby on Rails Fans! UPDATE, JUNE 2009: Want more up-to-date tutorials on Ruby programming? OK, we heard you. Go is expressive, concise, clean, and efficient. With TrainingRite. It runs on a variety of platforms, such as Windows, Mac OS, and the various ver. Detailed tutorial on Minimum Spanning Tree to improve your understanding of Algorithms. PHP is very common because it has a relatively simple architecture compared to other MVC based web frameworks (Python, Ruby, node. js to handle message menu interactions. Ruby Exercises, Practice and Solution: Ruby is a simple and powerful object-oriented programming language, created by Yukihiro Matsumoto. For instance x=a+b where a and b can take many different values. A list of RubyInstallers appears. It is built upon MSYS1, which is no longer maintained, now. Rock City tickets are valid for 1 year from date of purchase. Full documentation for the Kaltura VPaaS API. In general I recommend you work through them in order but if you've come here just to learn about a specific topic then who am I to slow you down, just head straight on over. The fact-checkers, whose work is more and more important for those who prefer facts over lies, police the line between fact and falsehood on a day-to-day basis, and do a great job. Today, my small contribution is to pass along a very good overview that reflects on one of Trump’s favorite overarching falsehoods. Namely: Trump describes an America in which everything was going down the tubes under  Obama, which is why we needed Trump to make America great again. And he claims that this project has come to fruition, with America setting records for prosperity under his leadership and guidance. “Obama bad; Trump good” is pretty much his analysis in all areas and measurement of U.S. activity, especially economically. Even if this were true, it would reflect poorly on Trump’s character, but it has the added problem of being false, a big lie made up of many small ones. Personally, I don’t assume that all economic measurements directly reflect the leadership of whoever occupies the Oval Office, nor am I smart enough to figure out what causes what in the economy. But the idea that presidents get the credit or the blame for the economy during their tenure is a political fact of life. Trump, in his adorable, immodest mendacity, not only claims credit for everything good that happens in the economy, but tells people, literally and specifically, that they have to vote for him even if they hate him, because without his guidance, their 401(k) accounts “will go down the tubes.” That would be offensive even if it were true, but it is utterly false. The stock market has been on a 10-year run of steady gains that began in 2009, the year Barack Obama was inaugurated. But why would anyone care about that? It’s only an unarguable, stubborn fact. Still, speaking of facts, there are so many measurements and indicators of how the economy is doing, that those not committed to an honest investigation can find evidence for whatever they want to believe. Trump and his most committed followers want to believe that everything was terrible under Barack Obama and great under Trump. That’s baloney. Anyone who believes that believes something false. And a series of charts and graphs published Monday in the Washington Post and explained by Economics Correspondent Heather Long provides the data that tells the tale. The details are complicated. Click through to the link above and you’ll learn much. But the overview is pretty simply this: The U.S. economy had a major meltdown in the last year of the George W. Bush presidency. Again, I’m not smart enough to know how much of this was Bush’s “fault.” But he had been in office for six years when the trouble started. So, if it’s ever reasonable to hold a president accountable for the performance of the economy, the timeline is bad for Bush. GDP growth went negative. Job growth fell sharply and then went negative. Median household income shrank. The Dow Jones Industrial Average dropped by more than 5,000 points! U.S. manufacturing output plunged, as did average home values, as did average hourly wages, as did measures of consumer confidence and most other indicators of economic health. (Backup for that is contained in the Post piece I linked to above.) Barack Obama inherited that mess of falling numbers, which continued during his first year in office, 2009, as he put in place policies designed to turn it around. By 2010, Obama’s second year, pretty much all of the negative numbers had turned positive. By the time Obama was up for reelection in 2012, all of them were headed in the right direction, which is certainly among the reasons voters gave him a second term by a solid (not landslide) margin. Basically, all of those good numbers continued throughout the second Obama term. The U.S. GDP, probably the single best measure of how the economy is doing, grew by 2.9 percent in 2015, which was Obama’s seventh year in office and was the best GDP growth number since before the crash of the late Bush years. GDP growth slowed to 1.6 percent in 2016, which may have been among the indicators that supported Trump’s campaign-year argument that everything was going to hell and only he could fix it. During the first year of Trump, GDP growth grew to 2.4 percent, which is decent but not great and anyway, a reasonable person would acknowledge that — to the degree that economic performance is to the credit or blame of the president — the performance in the first year of a new president is a mixture of the old and new policies. In Trump’s second year, 2018, the GDP grew 2.9 percent, equaling Obama’s best year, and so far in 2019, the growth rate has fallen to 2.1 percent, a mediocre number and a decline for which Trump presumably accepts no responsibility and blames either Nancy Pelosi, Ilhan Omar or, if he can swing it, Barack Obama. I suppose it’s natural for a president to want to take credit for everything good that happens on his (or someday her) watch, but not the blame for anything bad. Trump is more blatant about this than most. If we judge by his bad but remarkably steady approval ratings (today, according to the average maintained by 538.com, it’s 41.9 approval/ 53.7 disapproval) the pretty-good economy is not winning him new supporters, nor is his constant exaggeration of his accomplishments costing him many old ones). I already offered it above, but the full Washington Post workup of these numbers, and commentary/explanation by economics correspondent Heather Long, are here. On a related matter, if you care about what used to be called fiscal conservatism, which is the belief that federal debt and deficit matter, here’s a New York Times analysis, based on Congressional Budget Office data, suggesting that the annual budget deficit (that’s the amount the government borrows every year reflecting that amount by which federal spending exceeds revenues) which fell steadily during the Obama years, from a peak of $1.4 trillion at the beginning of the Obama administration, to $585 billion in 2016 (Obama’s last year in office), will be back up to $960 billion this fiscal year, and back over $1 trillion in 2020. (Here’s the New York Times piece detailing those numbers.) Trump is currently floating various tax cuts for the rich and the poor that will presumably worsen those projections, if passed. As the Times piece reported: