[Solid Ruby Basics] Ruby Quick Start, solid ruby Quick Start

[Solid Ruby Basics] Ruby Quick Start, solid ruby Quick Start

Address: http://www.cnblogs.com/aiweixiao/p/6664301.html

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1. Ruby Installation

1.1) [install Ruby]

Ruby installation on Linux/Unix

Ruby installation on Windows

$ Sudo yum install ruby # CentOS, Fedora, or RHEL system or sudo apt-get install ruby-full # Debian or Ubuntu System

$ Brew install ruby # Apple System

 

1.2) [interactive Ruby (IRb )]

TypeIrb, An interactive Ruby Session will start

2. Ruby syntax

2.1) [String]

-- [Output]

1 puts "Hello, world!"

-- [Chinese encoding]

Garbled characters are displayed in Chinese. The solution is to add the content at the beginning of the file.#-*-Coding: UTF-8 -*-(EMAC) or# Coding = UTF-8That's all.

#! /Usr/bin/ruby-w #-*-coding: UTF-8-*-puts "Hello, world! ";

2.2) [Class]

class Customerend

-- A ruby class must be defined before it can be used.

-- Sample Code

#!/usr/bin/ruby class Customer   @@no_of_customers=0   def initialize(id, name, addr)      @cust_id=id      @cust_name=name      @cust_addr=addr   end   def display_details()      puts "Customer id #@cust_id"      puts "Customer name #@cust_name"      puts "Customer address #@cust_addr"    end    def total_no_of_customers()       @@no_of_customers += 1       puts "Total number of customers: #@@no_of_customers"    endend