Typescript Json To Map

Therefore, I created a page showing a Google Maps map. js debugging guide, Node. This article covers using the Node Inspector to debug both JavaScript and TypeScript Node. Own libraries / fixed forks: domain-wait - domain-task replacement with async/await support and new features. TypeScript has brought a lot of improvement into how JavaScript developers structure and write code for apps, especially web applications. Simple TypeScript XMLHttpRequest. The following file tells TypeScript to put the compiled JavaScript in the. TS simply requires a tsconfig. NET MVC playing nice. TypeScript compiles to clean, readable, standards-based JavaScript. typescript-map. Client-Side Mapping and Processing Fast Interaction with Large Datasets TypeScript –tsconfig. JSON objects are surrounded by curly braces {}. This example aliases react to preact and some local custom module that is not in node_modules. A pretty simple way. json file is shown below. Json Map Convert In Typescript applications, We used to get the use cases where data in map object cast to JSON object or JSON to Map conversions. The ‘tsconfig. Creating a new Javascript module and distributing it is as simple as creating a package. By default, the type checker considers null and undefined assignable to anything. json is tsconfig. TypeScript's carefully considered language features and functionality, and its consistently improving tools, result in a terrifically productive development experience. json file is what tells Wayward that your mod folder is a mod, and provides information such as the version it can run on, the version it is, its name, and more. The value returned by reduce() would be that of the last callback invocation (10). Essentially this means that VSCode is not able to map the source files listed in Chrome to actual source files on the disk. 今回の検討の前提として、TypeScript の コードはサーバーサイドで使うことを想定しています. In TypeScript, You can iterate over iterable objects (including array, map, set, string, arguments object and so on) using forof loop. The filesThere are three files needed for this demo: tsconfig. Having this JavaScript code also means that, when looking at our application code in the browser, we won't be able to see the TypeScript source code. To fix this issue we'll create a file by the name of json-typings. TypeScript Question map json response into nested typescript object with rxjs In my Angular2-App I´m receiving a JSON-Response via http-Request that kind of looks like that:. Why does it do that, if it's not the intention of angular to provide mapping from json to typescript? It certainly lead me into believing that it fully supported mapping json to typescript objects, but clearly doesn't. json definitely some of the "impetus" behind my resolve to look at Typescript and React. json file is a JSON file that tells the TypeScript compiler how to compile TypeScript to JavaScript. One of the latest data sources now available in Power BI is JSON. Tweet This. vscode/launch. To support debugging TypeScript in combination with the executing JavaScript code, VS Code relies on source maps for the debugger to map between the original TypeScript source code and the running JavaScript. Use Map type and new keyword to create a Map in TypeScript. And, for months now, I've tried my hardest to write all of my Angular 2 demos using a single ES5. generate TypeScript interfaces from json json2ts. Nothing is more fundamental in JavaScript than object literals. TypeScript? I'm assuming that you're familiar with TypeScript, but in short: TypeScript is a superset of JavaScript that adds more strongly typed behavior to JavaScript and is compiled to JavaScript. If a TypeScripts ^1. Arbitrary Maps as JSON via Arrays of pairs # If a Map contains arbitrary (JSON-compatible) data, we can convert it to JSON by encoding it as an Array of key-value pairs (2-element Arrays). json Output files as AMD modules Bare minimum configuration. So I switched to a mode where I compile TypeScript first, then run debugging on the generated JavaScript files with source maps. json and add npm script to run automatically after the package installation completes. If we had a numeric enum, for example, something like ports where we map the SSL port to 443, we can see that we get a generated output with two mappings. Use toJSON method as suggested by Schipperz. Before you start using TypeScript, make sure you have. Knockout, Mapping plug-in, Typescript and ASP. So, there is a TypeScript preferences dialog with a “use tsconfig. Keys and values are separated by a colon. This will be executed because in the package. fromJS(jsData, {}, new. This would typically be the responsibility of the user of jsheatmap module, but I did build a general-purpose React application that demonstrates how HTML table cells can be used as a heat map representation. 0, typescript is listed as a peer dependency of react-scripts-ts. json” checkbox, but nowhere to actually supply the path to that file. SPFx development involves dealing with JSON response, which needs to be mapped to the equivalent interface in TypeScript to deal with the returned JSON response. json file, tsconfig file contains code that is used to convert typescript files into javascript. json file, but i can’t do that because the Electron runtime won’t find the main file and will give a runtime exception as such. In the example, I switch on source maps, so the TypeScript compiler will generate a. TypeScript interfaces allow optional properties to help you use these sorts of objects correctly. stringify() JSON. The tslint. That's fine if it doesn't, but it wasn't clear. To actually make it work, we have to compile our TypeScript code to JavaScript. JSON objects are surrounded by curly braces {}. When it finds the config, it uses those settings to build the project. We demonstrated using TypeScript with an end-to-end object-relational-mapping application that runs on Node. I'd like to develop Azure Functions with typescript with local debugging. This code is using an arrow function (in ES6) or fat arrow (aka lambda syntax in TypeScript). length Unfortunately an object's property can be accessed using its key in dot notation provided that the key is a valid identifier in js, and keys starting with number isn't valid identifer in js. It is a convenient way to put all your typescript related settings in one file so all scripts, editors and IDEs can recognize and adjust your project settings accordingly. Add a tsconfig. Source Maps. I also added in lib support for some core ES2016 features. JavaScript allows fields to be defined on objects without any predefined typing, but TypeScript requires that we define the type at the point of assignment to the mapping variable. If you are using VSCode to edit TypeScript code used with ts-node, you can set break points and quickly debug the program's execution. TypeScriptをコンパイルするコマンド tscがあつかう設定ファイル。 tsconfig. Source maps. In addition to the files we create, TypeScript will compile app. Angular has some third-party dependencies, one of which is RxJS, a library which makes reactive programming very easy to use. You can utilize this code to start automating your data uploads to IBM Food Trust™. json’ file has two main parts: the options passed to the compiler and the list of files. May 18, 2015 Decorators & metadata reflection in TypeScript: From Novice to Expert (Part I) An in-depth look to the TypeScript implementation of decorators and how they make possible new exciting JavaScript features like reflection or dependency injection. I make game in VisualStudio(TypeScript), and create levels in Tiled Map Editor. Daniel Van Den Eijkel created something that kept the principles of the Elm decoding library while being idiomatic in TypeScript terms. To learn more about source maps, see the development guide. ts ├── file. Initializing a new Cloud Functions project with TypeScript. GitHub Gist: instantly share code, notes, and snippets. We can see that CRA with TypeScript support (with an extra bit of project configuration) gives use a pretty solid build solution. typescriptで開発をしていると必要になってくるのが、tsconfig. All you have to do to start a new project is to run this command in a new folder:. parse() throws if the string passed to it has trailing commas. Each reference is currently just an object with a path field, and lets TypeScript know that building the current project requires building that referenced project first. Describes your existing data format(s). If you want to use an actual User object you have defined somewhere then you just need to make a new one and return it instead of the json. 0","info":{"description":"This is an online swagger codegen server. This will be executed because in the package. Introduction. In my previous article, Learned how to declared and implement typescript interfaces. It compiles the TypeScript code according to the options in "tsconfig. To learn more about source maps, see the development guide. Configuring TypeScript. mapファイル。TypeScriptコードとそこから生成されたJavaScriptコードとの対応関係を記述した. This would typically be the responsibility of the user of jsheatmap module, but I did build a general-purpose React application that demonstrates how HTML table cells can be used as a heat map representation. Thetsconfig. Essentially this means that VSCode is not able to map the source files listed in Chrome to actual source files on the disk. Configure VSCode debugging. ts Static File Drops Simulator Theming Editor Mapping from C++ to TypeScript. json file configures TypeScript for your project. For an up-to-date tutorial, please see the article Angular 2 Tutorial: Create a CRUD App with Angular CLI. A TypeScript configuration file, tsconfig. Let’s see how we use it. State-of-the-art JSON decoder libraries There are a few JSON decoding libraries out there, but there's one that stood out from the rest when I made the research a while ago. An optional reviver function can be provided to perform a transformation on the resulting object before it is returned. response=>new User(response. In this demo, “We will learn to set up tsconfig. NET MVC in visual studio environment, Its quite easy to integrate angular2 in asp. map((v,i) =>({before and it is working, and it was also for spHttpClient Call. map file Typescript. Nevertheless, this change does not bring much change. If you can update to TypeScript 2. Our TypeScript Application. Visual Studio Code is a great source code editor. stringify() JSON. TypeScript is a language for application-scale JavaScript. json to the root folder and "Enabling TypeScript Compiler" with "Use tsconfig. JSON, short for JavaScript Object Notation, is usually pronounced like the name "Jason. It is now possible to assign a string value to an enum member: enum MediaTypes { JSON = "application/json", XML = "application/xml" } The string enum can be used like any other enum in TypeScript:. ES JSON tipinde verileri muhafaza ettiğinden dolayı, JSON verisinin içinde veri tipini bu verinin nasıl indekslenmesi gerektiğini "mapping" ile belirtiriz ki mapping ES dünyasında şema demektir. If you are working with the angular-cli, you need to add two properties to the main tsconfig. This package. Coloquent Javascript/Typescript library mapping objects and their interrelations to JSON:API, with a clean, fluent ActiveRecord-like (e. In the first part we'll setup Visual Studio code for TypeScript + NodeJs debugging. js/V8/TypeScript compiler - all these are different things. Welcome! Log into your account. json with. I like to further break out the internal modules into Implicit and Named. json to get configuration options for generating JavaScript code from TypeScript sourcecode. js and TypeScript Published on December 22, 2015 September 24, 2018 by Yakov Fain Currently I’m working on the book chapter explaining how Angular 2 communicates with the servers. Our TypeScript application is going to simply expose a simple REST API that will allow us to perform basic CRUD on our MongoDB table. And when you are ready to deploy your JavaScript application run npm run build. json file might look like this:. Peter starts integrating a TypeScript client-side object with a server-side Web API service. TypeScript configuration. I make game in VisualStudio(TypeScript), and create levels in Tiled Map Editor. json to change main to point to the new dist folder created by the TypeScript compiler. var qry = ko. js callback after a Database fetch is done. However, most of the apps rely on create-react-app CLI and use ES6. To be an iterable, an object must implement the @@iterator method. Using a less strict tsconfig. json file configures TypeScript for your project. Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. json tells TypeScript to check whether the current version of TypeScript is running. That would probably require decorating each attribute to allow proper mapping back. tsx into app. Posts about TypeScript written by Andy Knight. With other enum types in TypeScript that would be the case. NET Web API to write a simple web application that implements a CRUD scenario. TypeScript debugging supports JavaScript source maps. Combined with VS Code's Intellisense forTypescript, it makes it fairly easy to start writing new functionality anddiscovering new APIs while being reasonably certain of its correctness. resolve: Webpack looks here to decide whether to consider this file for bundling or leave it, so in our app it considers files with extensions ‘js’, ‘jsx’, ‘json’, ‘ts’, ‘tsx’ for bundling. If you can update to TypeScript 2. start debug main process. Note: It’s important to have the same version of TypeScript used by WebStorm and used during build process (for example, used by Webpack loaders). json, add property "preLaunchTask": "tsc" to force Typescript compilation before app start. json 时从命令行手动运行 TypeScript 编译器,你可以通过以下方式: 运行 tsc,它会在当前目录或者是父级目录寻找 tsconfig. A TypeScript configuration file, tsconfig. json tells TypeScript to check whether the current version of TypeScript is running. The numbers in the table below specifies the first browser version that fully supports the JSON. This guide provides an overview and introduction to building React apps with TypeScript using various approaches. Hello! Is there a Map class (with key-value pairs) for TypeScript? Because I cannot figure out one. Second limitation, just like the original solution, is that it isn't very suited for javascript-to-json mapping yet. json里的target改成es6或者es2015,自动生成的js代码还是es5的,而且使用for of遍历Map的代码明显不对,是取了Map的length来遍历。我之前用js开发的项目里遍历Map的代码可以被转成正确的es5代码。 这是creator对ts的支持问题吗?有没有大神碰到过这种. Here source-map is added so that the code is source-mapped in the browser so that debugging can be made easy in development time. $ npm install --save-dev ts-jest To configure jest, let’s add a new "jest" configuration into the project’s package. In JavaScript, serialization and deserialization of objects can be achieved by using JSON. json" { const value: any; export default value; } Now your Angular 7 app is ready to serve the data from the local JSON file. The TypeScript compiler can resolve these paths from tsconfig so it will compile OK. Problem is addressed in upcoming 2017. The upside of this is greater control over our project and we also get all of the. Side quest: Making recursive objects printable. json file in a directory indicates that the directory is the root of a TypeScript project. Modify the tsconfig. This post is the second in a series of three posts to understand how the MVC architecture works to create frontend applications. vscode/launch. Array of properties to encode or a mapping function function(key, value). Since this extension uses the TypeScript compiler under the hood, all options set in the tsconfig. TypeScript will treat it as this object and everything is. Unverified breakpoint, Breakpoint ignored because generated code not found (source map problem?). " To learn more about JSON in general terms, read the "An Introduction to JSON. This is part of the Domain-Driven Design w/ TypeScript & Node. So I've put together just that. TypeScript em aplicações modernas. In TypeScript, You can iterate over iterable objects (including array, map, set, string, arguments object and so on) using forof loop. June 13, 2013 April 29, 2016 David Rousset 3D Software Engine,. tsc - This command will look at your tsconfig. CC BY-SA 2. For more please see System Research Report For TypeScript. I'd like to develop Azure Functions with typescript with local debugging. Peter starts integrating a TypeScript client-side object with a server-side Web API service. json file you can define compiler options, such as the version of JavaScript you’d like the transpiler to use. js/V8/TypeScript compiler - all these are different things. To learn more about source maps, see the development guide. TypeScript 3. 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. , via tsconfig. TS simply requires a tsconfig. json documentation. This one relies on the contents of the Map object being serialisable. 4 implemented one of the most requested features: string enums, or, to be more precise, enums with string-valued members. json file will contain all of our TypeScript project’s dependencies. Example to read JSON file to Dataset. Normally, you just give a single tsconfig. So please begin by creating an app folder and putting your app. Keys and values are separated by a colon. This will work in many situations, but there are problems with using object literals as maps. In webpack integration, we use awesome-typescript-loader (a TypeScript loader) combined with source-map-loader for easier debugging of source code. js file to include these two loaders:. TypeScript categorizes modules into internal and external modules. It’s fairly simple config “All TS files present in tsScripts folder will be transpiled using commonjs module to outDir (Output Directory) by keeping comments, sourceMap intact” One of the important step is to create typings. A TypeScript configuration file, tsconfig. //create a new directory mkdir typescript-react //change directory to the new folder cd typescript-react //run npm init npm init Configuring TypeScript. I read a JSON object from a remote REST server. By default, the type checker considers null and undefined assignable to anything. We can import or read local JSON files in Angular,several different ways depending upon the Angular version we are using. Calling Web Services with TypeScript. Also from the Domain-Driven Design with TypeScript series. TypeScript Functions - REST, Optional and Default Parameters; TypeScript Template Strings; Set in TypeScript; Map in TypeScript; TypeScript 'for…of' Loop; tsconfig. json" the compiler sees this file as a TS file and I'm getting errors. on my server side I have a Java object that contains a HashMap. This tutorial shows how to build a TypeScript project with the help of tsconfig. Open tsconfig. js └── file. JSON or Java Script Object Notation is a pretty cool way of transferring data and basically gives you the opportunity to move data from one place to another in a similar fashion to XML. json configuration files may have JavaScript-style // single-line and /* multi-line */ comments in them (even though this is technically invalid JSON). js and TypeScript concepts on this blog, particularly focused around Domain-Driven Design and large-scale enterprise application patterns. json file is shown below. stringify() This entire blog post talks about how I ended up mapping JSON from our REST API into our project’s TypeScript classes. io I read that typescript is not supporting Map Email codedump link for typescript parse json. The code below will produce the same output as the code in the block above:. If you are using VSCode to edit TypeScript code used with ts-node, you can set break points and quickly debug the program's execution. TypeScript の tsconfig. Serializing? Serialization is the process of converting complex objects into a data format that can be easily stored or sent across a network connection. The first step in any new TypeScript project is to add a tsconfig. Just to be sure here's my question: What is actually the most robust and elegant automated solution for deserializing JSON to TypeScript runtime class instances?. json value with startup. With an inline source map the source map data is presented as a comment at the tail end of the file. 2) Run the TypeScript compiler on the folder for the project. For more information on how to structure your project, read our Node. To get around this I configured sourceMapPathOverrides in launch. 1’s properties quite well but it seems it doesn’t play well with JSON. That's fine if it doesn't, but it wasn't clear. Inside lunch. IDE: Visual Studio Code. SPFx development involves dealing with JSON response, which needs to be mapped to the equivalent interface in TypeScript to deal with the returned JSON response. In-lined source maps (a source map where the content is stored as a data URL instead of a. js platform, and install just like any other Node. 1 or later, it figures out the path you’ve imported relative to the package, and reads from the package’s ts3. json file specifies the root files and the compiler options required to compile the project. JSON Editor Online is a web-based tool to view, edit, and format JSON. How to Import json into TypeScript. csp and Generate Outputs should (re)generate JsonInterfaces. Map and Set are great additions to JavaScript in ES6. TypeScript の tsconfig. json file? Ans. For more please see System Research Report For TypeScript. Next, update your package. To fix this issue we'll create a file by the name of json-typings. This code is using an arrow function (in ES6) or fat arrow (aka lambda syntax in TypeScript). Creating a new Javascript module and distributing it is as simple as creating a package. Net, Javascript, Java and PHP classes from JSON. json file, but i can’t do that because the Electron runtime won’t find the main file and will give a runtime exception as such. Provides TypeScript methods to map a JSON object to a JavaScript object on runtime Latest release 1. Arbitrary Maps as JSON via Arrays of pairs # If a Map contains arbitrary (JSON-compatible) data, we can convert it to JSON by encoding it as an Array of key-value pairs (2-element Arrays). I just needed a way to declare maps in my ts code in a safe, reusable way without taking dozens of kilobytes. Huge win for developer productivity and no more. Angular has some third-party dependencies, one of which is RxJS, a library which makes reactive programming very easy to use. Beginner's Guide To Setup TypeScript With Webpack. json file you can define compiler options, such as the version of JavaScript you’d like the transpiler to use. The service could be used alongside a form, any methods on a service or checking the result of one API before passing to another API. This was a very basic intro to TypeScript majorly focusing on how to setup TypeScript in various state of React projects which should enable to start with TypeScript. json file might look like this:. json uses the extends feature from TypeScript, then the Bazel implementation needs to know about that extended configuration file as well, to pass them both to the TypeScript compiler. “TypeScript is a smart choice when writing a modern web- or JavaScript-based application. #jsconfig vs tsconfig. json file specifies the root files and the options for the features provided by the JavaScript language service. We don't. Wouldn’t it be great if we could declaratively describe the mapping and have a mapper take care of the required mapping? Yes - I thought so too. Check if your JSON is correct, if not find out why with just one click. , via tsconfig. The tsconfig. If you can update to TypeScript 2. In TypeScript, You can iterate over iterable objects (including array, map, set, string, arguments object and so on) using forof loop. The following line must be added to our TypeScript configuration: tsconfig. json file and prints it to the console. js) include this? Why should it? default Node. The options we need to focus on are these:. A pretty simple way. I have a class in Typescript containing a map: public map:Map; constructor() { let jsonString = { "peureo" : "dsdlsdksd" }; this. js platform, and install just like any other Node. TypeScript debugging supports JavaScript source maps. TypeScript has two special types, null and undefined, that have the values null and undefined respectively. json Output files as AMD modules Bare minimum configuration. json - configures the typescript compiler index. 1’s properties quite well but it seems it doesn’t play well with JSON. In-lined source maps (a source map where the content is stored as a data URL instead of a separate file) are also supported, although in-lined source is not yet supported. This will work in many situations, but there are problems with using object literals as maps. The subscription is for when a new month and year is selected. 38K stars @angular/platform-browser. TypeScript? I'm assuming that you're familiar with TypeScript, but in short: TypeScript is a superset of JavaScript that adds more strongly typed behavior to JavaScript and is compiled to JavaScript. Check out complete Jackson tutorial at Java Jackson JSON Tutorial with Examples. I found a case where a user on StackOverflow had the same problem, even though he had the correct imports in the bootstrap file. json file and compile your TypeScript based on its configuration. as(beanEncoder); shall return a Dataset with records of Java bean type. State-of-the-art JSON decoder libraries There are a few JSON decoding libraries out there, but there's one that stood out from the rest when I made the research a while ago. Net Core In this article I am describing the date object's "toDateString" method in the TypeScript. The set() method adds or updates an element with a specified key and a value to a Map object. json file in the current working directory. The promise fate can be subscribed to using. 2) Run the TypeScript compiler on the folder for the project. Customize online with advanced options, or download a command-line tool. Refer to the references for more details. It allows us to store data in a key-value pair and remembers the original insertion order of the keys similar to other programming languages. json is tsconfig. I just needed a way to declare maps in my ts code in a safe, reusable way without taking dozens of kilobytes. After compiling to JavaScript, the result will still be an instance of this class. We talk about a lot of advanced Node. This JSON object has all the properties of a typescript class (by design). Here's how to integrate TypeScript with Knockout (and a warning about where test driven development seems to stop). 7 perl twitter. JSON allows integers, fractional numbers, strings, arrays and so on, but no way to natively specify a point in time. React is an open-source JavaScript library, which developers use to create high-end user interfaces for scalable. So, we need Typescript definitions for our code, in order to have Intellisense. If you are working with the Angular HttpClient long enough, you will realize the incoming JSON from the REST APIs you are calling is kinda strongly typed, but not really. There are two new fields to notice here: composite and references. We can install the typings tool with npm in package. json2typescript is a small package containing a helper class that maps JSON objects to an instance of a TypeScript class. add tsconfig. r/typescript: TypeScript is a language for application-scale JavaScript development. SPFx development involves dealing with JSON response, which needs to be mapped to the equivalent interface in TypeScript to deal with the returned JSON response. Binding a TypeScript ViewModel to HTML Using Knockout. json file and prints it to the console. 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: