Using Blocks in Ruby

Download free course Using Blocks in Ruby, pdf file on 25 pages by Jay McGavren.

Unannounced and unmarked, blocks turn up all over Ruby programs. Their use ranges from some of Ruby's most basic structures, such as loops, to some of its most sophisticated tricks. Similar to closures or lambdas in other languages, blocks enable some of Ruby's vaunted efficiency. Blocks even allow other people to write some of the code you use.

With this excerpt from Head First Ruby, you'll learn about blocks by looking at each concept from different angles. Exercises throughout will help you understand and remember how these closure-like structures work. In fact, these exercises are key component to our unique, hands-on Head First approach.

Bend your mind around blocks and methods
Build blocks into larger structures
Do heavy lifting easily with blocks
Get more done with less code

Table of contents

Blocks are mind-bending stuff. But stick with it!
Defining a method that takes blocks
Your first block
Flow of control between a method and block
Calling the same method with different blocks
Calling a block multiple times
Block parameters
Using the "yield" keyword
Block formats
The "each" method, step-by-step
DRYing up our code with "each" and blocks
Blocks and variable scope
Using "each" with the "refund" method
Using "each" with our last method
Our complete invoicing methods
We've gotten rid of the repetitive loop code!
Utilities and appliances, blocks and methods

Pages :	25
Size :	2.0 MB
Downloads:	85
Created:	2022-02-03
License:	CC BY
Author(s):	Jay McGavren

Warning: Trying to access array offset on false in /home/tutovnfz/public_html/amp/article-amp.php on line 263

Download file

Others related eBooks about Using Blocks in Ruby

Ruby on Rails PDF Tutorial

Learn the basics of Ruby on rails programming language, free training document in 250 pages for all level users.

Learning Ruby on Rails

Download free course Learning Ruby on Rails, pdf file on 291 pages by Stack Overflow Community.

Essential Ruby

This book written to provide clear and concise explanation of topics for programmers both starting to learn the Ruby programming language as well as those diving in more complex topics. Most examples are linked to online playground that allows you to change the code and re-run it.

Learning Ruby on Rails

This course aims to give you the basics to start ruby coding on the ruby on rails framework. It will teach you the logic to follow when performing a Ruby project, as well as the use of external resources (libraries, gem ...)

Ruby Regexp

Download free course Ruby Regexp, pdf file on 72 pages by Sundeep Agarwal.