Learning Ruby: The Language that Powers RailsYou 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.
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From inside the book
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... XHTML, 165 constants, 30, 220 global constants, 201 reflection on, 153 constants method, 88, 153 Coordinated Universal Time (UTC), 148 cos and cos! methods, 89 cosh and cosh! methods, 89 CR+LF, 12 CSS (Cascading Style Sheet), 169 ctime ...