Henri Binsztok, Adam Koprowski, Ida Swarczewskaja's Opa: Up and Running PDF

By Henri Binsztok, Adam Koprowski, Ida Swarczewskaja

ISBN-10: 1449328857

ISBN-13: 9781449328856

Want to simplify net improvement? This hands-on booklet indicates you the way to put in writing frontend and backend code concurrently, utilizing the Opa framework. Opa presents a whole stack for internet program improvement, together with an online server, database engine, distribution libraries, and a programming language that compiles to JavaScript.

You’ll research step by step easy methods to use Opa by way of construction tasks during the process the e-book: a wiki software just like Wikipedia, and a Twitter-like micro-blogging platform. notice how effortless it truly is to take advantage of Opa to advance purposes with real-time updates, database interactions, and net provider design.
• research basic ideas, together with Opa’s useful programming style
• detect how Opa compiles to JavaScript, utilizing jQuery at the frontend and Node.js at the server
• build HTML assets dynamically and embed static assets on an Opa server
• Use Opa’s technique for appearing CRUD operations and storing key-value pairs in MongoDB
• construct an Opa person interface with the Bootstrap toolkit from Twitter
• research variation kinds, pattern-matching, polymorphic forms, recursive capabilities, and different complex features
• deal with person debts via construction login varieties, dealing with account activation, and monitoring logged users
• construct a reactive UI—a real-time interface that consistently updates consumer events

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Opa: Up and Running - download pdf or read online

Want to simplify internet improvement? This hands-on booklet exhibits you the way to jot down frontend and backend code at the same time, utilizing the Opa framework. Opa presents an entire stack for net software improvement, together with an internet server, database engine, distribution libraries, and a programming language that compiles to JavaScript.

You’ll study step by step how one can use Opa via construction tasks in the course of the process the publication: a wiki program just like Wikipedia, and a Twitter-like micro-blogging platform. observe how effortless it truly is to take advantage of Opa to improve functions with real-time updates, database interactions, and net provider design.
• research basic innovations, together with Opa’s useful programming type
• realize how Opa compiles to JavaScript, utilizing jQuery at the frontend and Node. js at the server
• build HTML assets dynamically and embed static assets on an Opa server
• Use Opa’s strategy for acting CRUD operations and storing key-value pairs in MongoDB
• construct an Opa person interface with the Bootstrap toolkit from Twitter
• study version kinds, pattern-matching, polymorphic forms, recursive features, and different complicated beneficial properties
• deal with consumer money owed via development login kinds, dealing with account activation, and monitoring logged clients
• construct a reactive UI—a real-time interface that regularly updates consumer occasions

Extra info for Opa: Up and Running

Example text

With what you’ve learned so far, it is very easy to build sites consisting of multiple pages. start function: {dispatch: dispatch_fun}, where dispatch_fun is a function that takes a structured URL as an argument and produces a resource to deliver to the user. This process is often referred to as URL dispatching. You learned about resources in “Web Resources” (page 27) and about how to create them dynamically in “Constructing (Dynamic) Resources” (page 31). But what is a structured URL? It is a structural representation of a URL with all its components sep‐ arated.

Opa also features web templates, known as markdown templates, in its standard library. Inserts We’ve discussed the basics of static HTML, but things get much more interesting when you have to generate the HTML programmatically. In Opa, this is mainly achieved using inserts, which we will explain now. If you happen to know JavaScript (do not worry if you don’t) you are used to writing code like this: x + " + " + y + " = " + (x+y); Opa’s equivalent is the following: "{x} + {y} = {x+y}"; This is both shorter and more readable.

Options options, string source) This takes Markdown source and rendering options and produces an XHTML repre‐ sentation of the source. default_options, markdown); } Dynamically Updating the Page Now let’s take a look at the edit and save functions. give_focus(#content_edit); In the first line of the preceding code, we set the content of the text editing box to the Markdown source for the current topic, which we fetch with load_data. Then we hide the presentation field, display the editing box, and finally, give it a focus.

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Opa: Up and Running by Henri Binsztok, Adam Koprowski, Ida Swarczewskaja


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