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affordable web hosting shopping cart sans { font-family: sans-serif } Web Hosting Tips for Webmasters - Ruby Basic Input and Output Ruby provides what at first sight looks like two separate sets of I/O routines. The first is the simple interface---we've been using it pretty much exclusively so far. print "Enter your name: " name = gets There are a whole set of I/O-related methods implemented in the Kernel module---gets, open, print,printf, putc, puts, readline, readlines, and test---that make it simple and convenient to write straightforward Ruby programs. These methods typically do I/O to standard input and standard output, which makes them useful for writing filters. You'll find them documented starting on page 411.
affordable web hosting shopping cart The second way, which gives you a lot more control, is to use IO objects.What Is an IO Object? Ruby defines a single base class, IO, to handle input and output. This base class is subclassed by classes File and BasicSocket to provide more specialized behavior, but the principles are the same throughout. An IO object is a bidirectional channel between a Ruby program and some external resource.[For those who just have to know the implementation details, this means that a single IO object can sometimes be managing more than one operating system file descriptor.
affordable web hosting shopping cart For example, if you open a pair of pipes, a single IO object contains both a read pipe and a write pipe.]There may be more to an IO object than meets the eye, but in the end you still simply write to it and read from it. In this chapter, we'll be concentrating on class IO and its most commonly used subclass, class File. For more details on using the socket classes for networking, see the section beginning on page 469. Opening and Closing Files As you might expect, you can create a new file object using File.
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