Download PDF by Alejandro Serrano Mena: Beginning Haskell: A Project-Based Approach

By Alejandro Serrano Mena

ISBN-10: 1430262516

ISBN-13: 9781430262510

Starting Haskell offers a broad-based advent to the Haskell language, its libraries and atmosphere, and to the sensible programming paradigm that's speedy turning out to be in significance within the software program undefined. The e-book takes a project-based method of studying the language that's unified round the construction of an internet storefront. first-class assurance is given to the Haskell environment and aiding instruments. those contain the Cabal construct instrument for dealing with initiatives and modules, the HUnit and QuickCheck instruments for software program checking out, the Scotty framework for constructing net purposes, chronic and Esqueleto for database entry, and likewise parallel and disbursed programming libraries.

Functional programming is accumulating momentum, permitting programmers to specific themselves in a extra concise manner, decreasing boilerplate and lengthening the protection of code. certainly, mainstream languages corresponding to C# and Java are adopting gains from practical programming, and from languages enforcing that paradigm. Haskell is a chic and noise-free natural useful language with a protracted historical past, having an important variety of library members and an energetic group. This makes Haskell the easiest software for either studying and utilising sensible programming, and starting Haskell the best publication to teach off the language and what it might probably do.

* Takes you thru a sequence of tasks displaying the various components of the language.
* offers an summary of an important libraries and instruments within the Haskell ecosystem.
* Teaches you ways to use practical styles in real-world situations.

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Additional info for Beginning Haskell: A Project-Based Approach

Sample text

The default is 1. com/papers/responsetime. html. 38 | Chapter 5: Rule 5: Put Stylesheets at the Top last A value of –1 returns a Last-Modified header with a date equal to the file’s timestamp. A value of 0 results in no Last-Modified header being returned. The default is –1. redir A value of 1 causes a 302 response that redirects back to the exact same URL with redir=1 removed. The first example requires some slow images and a slow stylesheet. type=css&sleep=1&expires=-1&last=0"> Both the image and stylesheet use the expires=-1 option to get a response that has an Expires header in the past.

It’s true that the end user’s bandwidth speed, Internet service provider, proximity to peering exchange points, and other factors are beyond the control of the development team. However, there are more variables that affect response times. Rules 1 and 3 address response times by eliminating unnecessary HTTP requests. If there is no HTTP request then there is no network activity—the ideal situation. Rule 2 improves response times by bringing the HTTP response closer to the user. Rule 4, examined in this chapter, reduces response times by reducing the size of the HTTP response.

However, the relative savings remain about the same. A simple change in your web server configuration, compressing as many components as possible, dramatically improves the speed of your web pages. Gzip your scripts and stylesheets. 36 | Chapter 4: Rule 4: Gzip Components Chapter 5 CHAPTER 5 Rule 5: Put Stylesheets at the Top 5 A team running a major portal at Yahoo! added several DHTML features to their page while trying to ensure there was no adverse effect on response times. One of the more complex DHTML features, a pop-up DIV for sending email messages, was not part of the actual rendering of the page—it was accessible only after the page had loaded and the user clicked on the button to send the email message.

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Beginning Haskell: A Project-Based Approach by Alejandro Serrano Mena


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