By Matt Clements
ISBN-10: 143026568X
ISBN-13: 9781430265689
Ruby quickly Syntax Reference is a condensed code and syntax connection with the Ruby scripting language. It offers the fundamental Ruby syntax in a well-organized layout that may be used as a convenient reference. you will not locate any technical jargon, bloated samples, drawn out historical past classes, or witty tales during this e-book. What you'll find is a language reference that's concise, to the purpose and hugely obtainable. The ebook is choked with beneficial details and is a must have for any Ruby programmer. This e-book is a short, convenient pocket syntax reference for knowledgeable Ruby programmers, and a concise, easily-digested creation for different programmers new to Ruby.
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Additional resources for Ruby Quick Syntax Reference
Sample text
We want to prevent further modification to the object. frozen? info Chapter 8 ■ Objects Object Metadata As with other data types within Ruby, we can easily determine some metadata regarding an object, such as the Class that it is part of, details about the object, or the methods available. instance_of? is_a? Car #=> true We can determine the available methods within a class. methods #=> startEngine nil? ~ eql? private_methods puts "=======================" puts "" #=> Public Methods startEngine nil?
Instead we can use the map method to output the changed elements, or the map! method to change the original array. map! info Chapter 4 ■ Arrays While these methods are extremely useful for looping through an array, these simply loop through the elements within the array. each_with_index { |item,index| puts "#{index} = #{item}" } 0 = Hello 1 = World 2 = Welcome => ["Hello", "World", "Welcome"] Selecting Elements from an Array Using Ruby we have a number of methods to select elements from an array.
Reverse_each { |item| print item, " " } 1 2 1 1 6 1 => [1, 6, 1, 1, 2, 1] With the each method, even if we update the elements value, this does not change the initial array. Instead we can use the map method to output the changed elements, or the map! method to change the original array. map! info Chapter 4 ■ Arrays While these methods are extremely useful for looping through an array, these simply loop through the elements within the array. each_with_index { |item,index| puts "#{index} = #{item}" } 0 = Hello 1 = World 2 = Welcome => ["Hello", "World", "Welcome"] Selecting Elements from an Array Using Ruby we have a number of methods to select elements from an array.
Ruby Quick Syntax Reference by Matt Clements
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