By Huw Collingbourne
Ruby is known for being effortless to profit, yet so much clients in basic terms scratch the skin of what it will possibly do. whereas different books specialise in Ruby's trendier positive aspects, The booklet of Ruby unearths the key internal workings of 1 of the world's most well liked programming languages, educating you to jot down transparent, maintainable code.
You'll commence with the basics—types, information constructions, and keep an eye on flows—and development to complicated positive aspects like blocks, mixins, metaclasses, and past. instead of bathroom you down with loads of thought, The e-book of Ruby takes a hands-on process and makes a speciality of making you effective from day one. As you stick to alongside, you'll study to:
* Leverage Ruby's succinct and versatile syntax to maximise your productivity
* stability Ruby's sensible, vital, and object-oriented features
* Write self-modifying courses utilizing dynamic programming techniques
* Create new fibers and threads to regulate self sustaining procedures concurrently
* seize and get over execution error with powerful exception handling
* enhance robust net functions with the Ruby on Rails framework
Each bankruptcy encompasses a "Digging Deeper" part that indicates you ways Ruby works lower than the hood, so you'll by no means be stuck off protect by means of its deceptively easy scoping, multithreading beneficial properties, or priority rules.
Whether you're new to programming or simply new Ruby, The ebook of Ruby is your consultant to swift, real-world software program improvement with this precise and chic language.
Read Online or Download The Book of Ruby: A Hands-On Guide for the Adventurous PDF
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Additional resources for The Book of Ruby: A Hands-On Guide for the Adventurous
Sample text
Most of these methods create new string objects. " 38 Chapter 3 A few string methods actually alter the string itself without creating a new object. These methods generally end with an exclamation mark (for example, the capitalize! method changes the original string, whereas the capitalize method does not). In addition, the string itself is also modified—and no new string is created—when you assign a character at an index of the string. For example, s[1] = 'A' would place the character A at index 1 (the second character) of the string s.
The to_s method is obligatory when concatenating Fixnums using the + method or a space; attempting to concatenate a number without using to_s is an error. to_s puts("(s1):" << s1) puts("(s2):" << s2) puts("(s3):" << s3) The previous program produces this output: (s1):This is a string $ (s2):This is a string 36 (s3):This is a string 36 S t ri n gs a n d Ra n g e s 37 What About Commas? You may sometimes see Ruby code that uses commas to separate strings and other data types. In some circumstances, these commas appear to have the effect of concatenating strings.
You will see that I have created two readable attributes in the Thing class: name and description. rb attr_reader( :name, :description ) attr_writer( :description ) I have created a method called to_s, which returns a string describing the Treasure object. Recall that all Ruby classes have a to_s method as standard. to_s method overrides (and replaces) the default one. to_s):: The #{@name} Thing is #{@description}" end You can override existing methods when you want to implement new behavior appropriate to the specific class type.