How+ To+ Map+ Json+ Data+ With+ Array+ In+ React+ Native

This is not a big issue — JavaScript provides a global JSON object that has methods available for converting between the two. Then you try to map each key to the type you want it to be on the Reason side. js, and then hit Cmd+R and see your changes instantly update. Import GitHub Project Import your Blog quick answers Q&A. Component · render() · componentDidMount() · props/state · dangerouslySetInnerHTML · React is a JavaScript library for building user interfaces. If you’re using Expo, this tutorial also includes a few tips that are specific to Expo users. Most React apps I build are self-contained - the entirety of the app lives within a root component, and is responsible for rendering the full web page/app. In this tutorial, I'll show you how to create a simple. Including wrapping rows with additional div tags, styling, etc. NI's virtual instrument collection/infrastructure is extensive to say the least, and all. Where Can I See WordPress’s JSON. map is another array. React Native FBSDK is a wrapper around the iOS and Android Facebook SDK which allows for Facebook integration in React Native apps. APPLIES TO: SQL Server Azure SQL Database Azure SQL Data Warehouse Parallel Data Warehouse JSON is a popular textual data format that's used for exchanging data in modern web and mobile applications. Fixed a bug in Firebase's environment check that can cause errors when Firebase is bundled into user code (using tools such as Rollup). This is how many components like FlatList in React Native, and react-virtualized work. Get JSON data from HTTP in React Native. Again, the callback is invoked with three arguments: the value of the element, the index of the element, and the Array object being traversed. Margins and the hacks we do to clear them in various contexts have long been one of my primary annoyances with CSS. [email protected] You are creating an Android app and want to read data from a MySQL database and send data. Install react-native-maps-directions as a dependency using either. But this tutorial on the other hand, not for starters at all You don’t explain much about what you did and why you did what you did, making this tutorial not very educating, more like copy-pasting for people who are new to React Native. React Router Location Object Key. Learn how to make a button in React Native by using the TouchableHighlight component. Array: 是: 要获取的字段名数组 AsyncStorage. Simpel to use JSON based survey component for React Native. It can be an array of numbers, strings, objects, array of array etc. For a more detailed info about JavaScript JSON Array have a look at the official docs. Afterward, we can create and run a simple project with just three commands: create-react-native-app yourprojectname cd yourprojectname npm start How it works… When you run your app, it starts a server at your machine, at port 19000 or 19001, to which you will connect using the Expo application. Asking for help, clarification, or responding to other answers. In fact, as far as React is concerned, it doesn’t even know there’s a “server” in the picture at all. Fetching data revamped Mapbox Maps SDK for React Native if you have. Native Instruments has updated its lineup of MIDI keyboards for Mac this year including several of its most affordable yet. Learn JSON array example with object, array, schema, encode, decode, file, date etc. In this situation, map through the array stored in the state players and show each player name inside the map function. Introduces UI-schema concept to customize widget selection, CSS classes. That one breaks with the latest React Native. Very similar to how HTML5 local storage functions with key-value pairs. JSONDeserializer takes as input a json string and produces a static typed object graph from that json representation. org Let's start. Easy to understand and informative one, good job man! Recently I studied the question of generating JSON data. React Native Express. ReactJS - Components - In this chapter, we will learn how to combine components to make the app easier to maintain. In this post I show how JSON date serialization works, a few approaches how you can manage dates and how to automate the process of converting JSON dates to 'real' dates more easily. Transfer a call immediately, or consult with the recipient over chat first. Image source. [email protected] Now you can link it and then later remove it from the root package. A Github Stars History for Angular, React & Vue (Source) The Technology Radar from ThoughtWorks gives a good impression of how technologies evolve ChartModel○ Pie○ Doughnut○ Bar○ Line○ PolarArea○ Radar○ Combo PrimeReact is a collection of. React-Native Module, ReadableMap/Array to Java JSON objects - ReactNativeJson. Firebase & React Native. Can anyone just give me a definition of what the key is within the location object from react router? All I see is that sometimes it has a string as its valueI have looked around the source code and the internet and I still don't have a solid understanding. You will learn about React Native and explore some of the features of React Native to implement a mobile app based on the React application that was implemented in the previous course on React. As a pragmatic iOS developer, you’ll come across JSON sooner rather than later. Published Dec 08, 2018. Those React-Native components map the actual real native iOS or Android UI components that get rendered on the app. Also read : Working with JSON data in ASP. Changing a React Component’s State with setState() State and the Single Source of Truth; Rendering an Array of Data with map() and JSX; Cleaning up and Preparing for a Real Project; Fetching Ajax Data from GitHub using SuperAgent; Converting GitHub’s JSON into Meaningful JSX; Time for a Task: Reading from Three Feeds. js below render the following chapter structure in a react native ListView. JSONDeserializer takes as input a json string and produces a static typed object graph from that json representation. Parsing Coinmarketcap JSON array in nodeJS Displaying user information on Google Map on click of the location using node js, express and mongodb React-native. 問題是,JSON數據包含字典。. In order to use react-table you need to install it using Node Package Manager(npm). Production grade React applications that scale. Statically typed, based on the latest React Native components, and with no native dependencies, this. Then you try to map each key to the type you want it to be on the Reason side. While developing a JavaScript application, you will sometimes want to serialize your data into a plain string. We'll use props, a plain old JavaScript Array. One is using native Hive JSON function such as get_json_object and the other is to use a JSON Serde to parse JSON objects containing nested elements with lesser code. Working with Images in React Native is quite common, but what can we do when those images have different dimensions and have to fit into a box? How to scale images in React Native keeping the proportions and not affecting UX. capture') React-Native - undefined is not an object (“evaluating _react3. You can use Codable in Swift to encode and decode custom data formats, such as JSON, to native Swift objects. In real apps, however, forms are often a bit more lively and dynamic. but at line 21 it doesn't assign to the airportStatus state. Native instruments. Adding Authentication to Your React Native App Using JSON Web Tokens We're going to look at getting started with a very simple React Native app and the use of JSON Web Tokens to provide. Where to fetch in React's component tree? How to fetch data in React?. I am using react-native-maps to render a Google map on my phone. Awesome React Native: Building Android App with JavaScript Building mobile applications using JavaScript is in trend these days. JSON (Java Script Object Notation) is a light weight data interchange format that is now being used as a profound and efficient way of gathering, collecting or share data among applications and interfaces. Stack Overflow is amazing for Q&A: it has a reputation system, voting, the ability to mark a question as answered. It allows to access to native components, from login to sharing, entirely through documented JavaScript modules so you don't have to call a single native. It is easy for humans to read and write. With the help of map, we pick only the relevant data and put it into a new array of objects that only contain id and name of the returned contacts. Ext JS to React: Load, Sort and Filter Data with React. It allows storing simple sets of data as text or serialized JSON objects. This creates a new React Native project for us, which, at the time of writing, is at version 0. Let's say you have the following array called movies:. native related issues & queries in. Welcome to the bleeding edge. stringify(). These React Native starter kits are designed for both iOS and Android. Explore JSON and how JavaScript Objects can be used to access data within JSON data format and output to your web page Guide to learning how to use JavaScript Objects and JSON data. Basic Radar Chart Contribute to iktw/react-native-hud-view development by creating an account on GitHub. In cases like this, a combination of command line tools and Python can make for an efficient way to explore and analyze the data. I would like to use reactJS to do something like this. parse () throws if the string passed to it has trailing commas. When you load JSON data from Cloud Storage into BigQuery, note the following: JSON data must be newline delimited. The Example1 component display the SocialMedias array data, the second component Example2 displays the Experiences array data and finally the third component Example3 displays the Skills data. You’ll need to use the underlying VirtualizedList component for this. Then you try to map each key to the type you want it to be on the Reason side. While developing a JavaScript application, you will sometimes want to serialize your data into a plain string. React Native, which enables native Android, iOS, and UWP development with React, was On April 18, 2017, Facebook announced React Fiber, a new core algorithm of React framework library for building user interfaces. render React components to Sketch; tailor-made for design systems. JSON can represent two structured Provide File Format to read JSON and XML data from Storage Able to read the JSON and XML file as part of external system OR provide functionality like Extractor in Data Lake analytics so we can write. i didn't find any reference for this kind of problems [{"id": 824233, "project_id": 1457,. But this is the predefined ABAP to JSON mapping! What you want to achieve is a selfdefined ABAP to JSON mapping including a derserialization and for this, you must either evaluate the asXML in your transformation yourself or deserialize the ABAP data before transforming them. Here is a basic example of what might be in a string. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Pretty insane difference, great work @kzzzf To this end, developers used Flutter not as a replacement for Native but as pits the Flutter-based solution against React Native in a competitive. Wordpress API Json Data in React Native. One of the best ways to exchange information between applications written in different languages is to use the JSON (JavaScript Object Notation) format. ̸̸̸̨̨̨̨Love ų̸̸̨. stringify is used with the first argument only. In React Native, this is done with something called. 8, MySQL supports a native JSON data type defined by RFC 7159 that enables efficient access to data in JSON (JavaScript Object Notation) documents. This maps over to the native iOS and we can then put our JSON data into it. value A value to encode. In this article, let me show you how to loop through an array of data using React best. Summary: in this tutorial, we will show you how to work with PostgreSQL JSON data type. Internal state is not preserved when content scrolls out of the render window. Android Development Environment. ̸Ҳ̸ҳ[̲̅B̲̅][̲̅7̲̅][̲̅B̲̅ - de-de. React is great at abstracting away the DOM from you when building apps. fetch data from json local file react native Linux way Kung Fu. The Google Maps Data layer provides a container for arbitrary geospatial data. Fixed a bug in Firebase's environment check that can cause errors when Firebase is bundled into user code (using tools such as Rollup). Let's look into example of getting JSON data with fetch() function. In the examples above we always used bytes and strings as intermediates between the data and JSON representation on standard out. React native filter. Build a List of Pets for Adoption App with React Native – Part 1 return an array of data objects is sending the expected JSON with structure matching data. Let's create a new component for our row Pass the row as a prop Render the text inside a View Apply some styles (borderBottom, padding) var MapPoints = React. React Native. In this page, we'll see how to install FusionCharts and render a map using the react-native-fusioncharts component. The default sort order is built upon converting the elements into strings, then comparing their sequences of UTF-16 code units values. Array: 是: 要获取的字段名数组 AsyncStorage. It is easy for humans to read and write. I need to build out table rows of parents and then children rows of each parent. React is great at abstracting away the DOM from you when building apps. Osram opto semiconductors gmbh regensburg germany, Cobija san marcos meme. The JSON data type provides these advantages over storing JSON-format strings in a string column:. Swipe, React Native, Intro Markdown editor (input) based on React. Generate native forms and validation from domain models. Using React without JSX is cumbersome and frustrating, while using JSX is such an easier way to express your code. React Native creates a basic LaunchScreen. org: “JSON (JavaScript Object Notation) is a lightweight data-interchange format. There were a couple of options that I could use. MongoDB supports draft 4 of JSON Schema, including core specification and validation specification, with some differences. npm i -g react-native-cli Next I created my project by the following command: react-native init MapExample (At the time of my build my react-native-maps was v0. With react-native-maps , getting the location is an async task, so you will need a solution like Credits to the github issue's answer by the way. Those React-Native components map the actual real native iOS or Android UI components that get rendered on the app. Is React Native all too different? You've heard about this thing called React Native and want to play with it… or even build a client project with it. By using Jackson-core API we easily parse JSON from a file or object to java object. While Europeans did indeed do horrible things, the natives weren't exactly innocent. The React Native tutorial is largely similar to the one for React. Can also handle json schema. This is an important part of the JSON Data Interchange Format (RFC 4627). This maps over to the native iOS and we can then put our JSON data into it. When makingnetwork-connected apps, the chances are that it needs to consume some good oldJSON, sooner or later. But this tutorial on the other hand, not for starters at all You don’t explain much about what you did and why you did what you did, making this tutorial not very educating, more like copy-pasting for people who are new to React Native. This guide provides examples for using the Facebook Graph API in your React Native applications. parse() method parses a JSON string, constructing the JavaScript value or object described by the string. In programming, data types is an important concept. x) released. JSON has become a widely accepted and popular format for data due to it’s platform neutral nature, lightweight format, and it’s ability to convert directly to native JavaScript Objects. By using Jackson-core API we easily parse JSON from a file or object to java object. jpg [email protected] (Optional) Add a branch. Async storage react native. The following code shows how map works when a function requiring one argument is used with it. JSON is the most popular format for data exchange between applications. flight-list. React Native Tips and Tricks 2. React Native CLI. Inline Edit Todo Items in a React Native ListView. In this tutorial, we will see how to use JSON. React Native offers a way to optimize images for different devices using @2x, @3x suffix. shape”) Undefined is not an object (evaluating 'RCTAsyncStorage. It needs to be converted to a native JavaScript object when you want to access the data. Get Array From Json React Native. In fact, as far as React is concerned, it doesn’t even know there’s a “server” in the picture at all. Navigators (Stack Before diving into this example, you need to first go through React Native Navigation. We may earn a commission for purchases using our links. For example, you can use D3 to generate an HTML table from an array of numbers. React Native Full Width Horizontal JSON ScrollView showing Page Numbers Android iOS Tutorial August 25, 2017 August 25, 2017 React Native In this tutorial, I am going to show how we can create full width horizontal JSON ScrollView showing Page Numbers and how we can update the current page during scrolling. Within a less span of time, we can also process large amounts of data and get the desired results. JSON stands for JavaScript Object Notation. Since data structure supported by JSON is also supported by most of the modern programming languages, it makes JSON a very useful data-interchange. simple to read JSON file. Embedding Fonts in Your Qt Application. Welcome! Log into your account. If you need to parse through some JSON data at the command line, jq is here for you. Tutorial - Internationalization of React Native apps¶. In this tutorial, we will learn how to parse JSON Objects and JSON Arrays in Android using Kotlin. React Native has a native API for writing bridge modules that export functions to JavaScript. A React Native bridge method works only with standard JSON types. js Recently we have experienced rapid growth of. In various programming languages, it is called as array, vector, list, or sequence. JSON is built on two structures: A collection of name/value pairs. React Native Adding Icons at the Bottom of Tab Navigation. React native filter. With the growing popularity of React and the rise of native mobile app development (and PWA), it's not surprising that React-Native is getting more adoption in the community every day. I'm new to JSON and filtering. It picks the right approach of saving data depending on the platform used by an application. React Native. Now you can link it and then later remove it from the root package. Styling the data. React Router Location Object Key. Pass in an array of Strings to set the categories. When creating a recyclerview with a gridlayout layout manager you have to specify the span count in the constructor. We will parse JSON response and map it to Kotlin data class. Stack Overflow is amazing for Q&A: it has a reputation system, voting, the ability to mark a question as answered. An array is an ordered sequence of zero or more values. Install FusionCharts and the react-native-fusioncharts component using any of the following. JSON is one of the widely used data-interchange format as it is a lightweight data-interchange format and language independent and it started to slowly replace the XML format. stringify(). Compare the technical and performance differences between Formik and React Hook Form, a relatively new Hooks-based React form builder. Step 2: Process the JSON Data. This guide looks into ways of using JSON with. Simple JSON DB. Scrolling screenshots weren't a part of Android devices until a user asked Google to implement it. A step-by-step guide on updating/removing array state elements in React/ReactJS. You can change the appearance of your data by adding GeoJSON data to a Map object. Internal state is not preserved when content scrolls out of the render window. Folding ranges are available for all object and array elements. Browse other questions tagged javascript react-native ecmascript-6 react-jsx or ask your own question. Use the portal. Awesome React Native: Building Android App with JavaScript Building mobile applications using JavaScript is in trend these days. length property and a value on the. One of the first questions new React developers have is, "How do I do AJAX requests in React?" a. Learn how to manipulate arrays in React state by using JavaScript array methods such as concat, map and filter. ̸Ҳ̸ҳ[̲̅B̲̅][̲̅7̲̅][̲̅B̲̅ - de-de. This being said, if you have no need to run ajax to look-up new data, it would be best to move the algorithm for building the states array and map object to outside the typeahead source function. toJson() method. Supporting both iOS and Android, React Native has the potential to expand across all the future platforms. android ios javascript Mobile react-native reactjs Today's article and video tutorial explains how to parse and render the json data using some of the best React Native packages. Then you try to map each key to the type you want it to be on the Reason side. Dynamic JSON parsing makes it possible to map this data, without having to map the entire API to a C# data structure. Pingback: Build a List of Pets for Adoption App with React Native - Part 2 | Rational App Development() Doug Sheridan I'm getting 'undefined is not an object (evaluating 'data. xmltodict is a python package which is used to convert XML data into JSON and vice versa. We will use Retrofit library for making API call. Assuming that you have access to jQuery in your web page, fetching JSON data is very simple. React-Native Module, ReadableMap/Array to Java JSON objects - ReactNativeJson. React Native Transform Scale Animation Android iOS Example. JSON exists as a string — useful when you want to transmit data across a network. In this chapter, we will talk about state. With this, we can map through the array of posts in render(). Try this project on your phone! Use Expo's online editor to make changes and save your own copy. URL parameters are a fundamental aspect of React Router and a fundamental aspect of building web applications. It exposes react-native binary, so you can call yarn react-native or npx react-native directly from your project. Technical Overview. If you're new to React Native, Realm or CSS Flexbox, it'd be best to walk your way through: Getting Started React Native Getting Started Realm React Native Layout with. How to do this in Flutter? Cheat sheet for React Native developers trying Flutter. While not needed in this getting started flow, Amplify provides React Native bridges when using the Auth category in the aws-amplify-react-native package. Build a List of Pets for Adoption App with React Native – Part 1 return an array of data objects is sending the expected JSON with structure matching data. Again, with a this type of arrangement if there is additional logic needed to render rows that can be abstracted away. The top-level data property contains the main data for the response. [code]var obj = require("your json file location "); [/code]You can simply assign the json file to your data variable. fetch data from json local file react native Linux way Kung Fu. What's up, guys? I have a question, in my native language (portuguese) it's possible to ask a question of any one of these 4 ways below (by inverting the words order in the sentence). Here, we called the map method on json. With this, we can map through the array of posts in render(). Just $5/month. How Stack Overflow for Teams Brought This Company's Leadership and… Linked. React Native is a framework for building cross-platform apps. • string properties map to String • data properties. Basic Radar Chart Contribute to iktw/react-native-hud-view development by creating an account on GitHub. A new version of ReactXP will be released periodically following the same general update timeline of React Native. How to Send and Receive JSON Data to and from the Server. My JSON code:. There is no external state management solution, such as Redux or MobX, involved to store your fetched data. JSON is a lightweight data-interchange format. React Native Custom JSON ListView With Images and Text Example admin September 3, 2017 September 3, 2017 React Native Hello Guys 🙂 , Creating custom JSON ListView with Images and Text is most probably used in all type of android and iOS applications. fetch data from json local file react native Linux way Kung Fu. The value of any JSON key can be a string, Boolean, number, null, array, or object. React Native has a built-in persistent key-value storage called AsyncStorage. Pass PHP Arrays to JSON and JS with json_encode. The key to rendering MapBox markers in your React Native application is implementing the MapboxGL. 問題是,JSON數據包含字典。. It’s the new official way to build navigation in react native apps. 59 and lower) If you are using CocoaPods to manage your dependecies, uncomment the lines related to Google Maps from the Podfile and run pod install. when they are offline. The keys in Map are ordered while keys added to object are not. This is a fork of node-xml2js to support react-native. There exists an extensive React testing tutorial about this topic, but here it comes in a nutshell. We also had to create native objects from ones we passed from JavaScript. You will need to send dSYM files to our Upload API in order to symbolicate native iOS stack traces. As you’ll see in this post, Fetch is very easy to use and work with and greatly simplifies fetching resources from an API. With react-native-maps , getting the location is an async task, so you will need a solution like Credits to the github issue's answer by the way. capture') React-Native - undefined is not an object (“evaluating _react3. getAllKeys((err, keys) => { AsyncStorage. The Set Up. If a list needs 50+ of these items, with server-side templating we’d typically get the entire markup back from the Ajax call. 3 Libraries and 3 Ways to Handle AJAX in React Apps. Contents in this project Set onPress onClick to Image :-Start a fresh React Native project. The Google Maps API is really buggy running on iOS. Instead, if a template of the markup is available client-side, we can get just the data via Ajax (as a object or an array), then parse the data and generate the final HTML using the template. The container can also be configured to persist your navigation state. With the help of map, we pick only the relevant data and put it into a new array of objects that only contain id and name of the returned contacts. • React-Native doesn’t use HTML to render the app, but provides alternative components that work in a similar way. There are several ways to use this API, including a new one that my colleagues and I just released. js and Node. React Native Starter. Personally I like the VIRO more as their stack is their own 3D render engine combined with React Native so it's a familiar open-source framework from Facebook that lots of web and mobile developers are familiar with. This makes React Native even easier for web developers to pick up. value A value to encode. FileMaker 16 introduces native functions to create and extract data from JSON, making interactions with web services easier and more streamlined. I need to build out table rows of parents and then children rows of each parent. You may find that after the step above the react-native command fails with PCH issues. Once you receive the array, you can use Iterator to traverse through JSON array. It is widely used as a data storage and communication format on the Web, even in languages other than JavaScript. In computing, JavaScript Object Notation (JSON) (/ ˈ dʒ eɪ. Build native iOS and Android mobile apps with React Native. npm i -g react-native-cli Next I created my project by the following command: react-native init MapExample (At the time of my build my react-native-maps was v0. Use the flutter create command from the command line. The input blob can be as flat as an array of strings, or an object with rows nested inside section objects. JSON (JavaScript Object Notation) is a lightweight, text-based, language-independent data exchange format that is easy for humans and machines to read and write. In this lesson, we're going to talk about iterating over a data set in order to create our JSX. Atomic Object's blog on everything we find interesting. How to Create a News Reader With React Native: Web Page Component In this tutorial, we'll be creating a news reader app with React Native. This is an Example to Switch from One Screen to another using React Navigation 4. In programming, data types is an important concept. Getting started with React Native will help you to know more about the way you can make a React Native project. Similar to polylines, if you need to interoperate with a new (10. This JSON formatted file is responsible for describing aspects of your app. Comments are not allowed in JSON. Then, by using the key-value pair of each object inside the array, we created another object with name and id key-value pairs. It exposes react-native binary, so you can call yarn react-native or npx react-native directly from your project. Should I know JavaScript before learning React Native? Update Cancel. Can also handle json schema. That one breaks with the latest React Native. Run the following command to cross check React-native version. My view controller is written in Swift, and creates the RCTRootView in viewDidLoad. x) released. This makes React Native even easier for web developers to pick up. React Native is based on the same core concepts as ReactJS, giving you, the developer, the power to compose a cross-platform mobile UI by writing JavaScript components. It’s deeply nested and has multiple arrays — to build this data real. jsx and have the same lifecycle normal React components use. jQuery’s ajax method provides a way to make an HTTP request for JSON data and then handle the successful result. Indefinite-length arrays and maps are dealt with differently than indefinite-length byte strings and text strings. I am using React/Redux and am storing animation data in JSON and trying to get it to display on a React page. React Native Express. react-native link might not work well with monorepo projects without nohoist; to workaround this, use nohoist on **/react-native OR instead of installing the dependencies only using yarn workspace mobile add xxx, install them in the root directory as well: yarn add xxx -W. kr - 남노갈비 전주 남노물갈비. Contents in this project Set onPress onClick to Image :-Start a fresh React Native project. Aug 22, 2017 • Rohan Paul. Using The Native Screen Capture Feature. We've also utilised a number of new React Native components, such as Images and FlatLists, as well as an introduction to the React Native Elements library, and how to use Cards and Dividers. Array-like objects — those with a. 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: