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Learning Ruby; How This Book Works; About the Examples; How This Book Is Organized; Conventions Used in This Book; Comments and Questions; Safari® Enabled; Acknowledgments; 1. Ruby Basics; Shebang!; Issue a System Command; Appending a String; Multiply; Inserting a Shell Command; Using a Variable; Expression Substitution; Formatting a String; The eval Method and -e Option; Getting Input from the Keyboard; Methods; The block; The each Method; The proc; XML; The Class; The Tk Toolkit; Editing and Running Ruby in TextMate; Interactive Ruby; Resources; Installing Ruby.;You don't have to know everything about a car to drive one, and you don't need to know everything about Ruby to start programming with it. Written for both experienced and new programmers alike, Learning Ruby is a just-get-in-and-drive book -- a hands-on tutorial that offers lots of Ruby programs and lets you know how and why they work, just enough to get you rolling down the road.