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cheap jsp web hosting .\n" If you combine the idea of an iterator with the auto-closing block feature, you get IO.foreach . This method takes the name of an I/O source, opens it for reading, calls the iterator once for every line in the file, and then closes the file automatically. IO.
cheap jsp web hosting foreach("testfile") { |line| puts line } produces: This is line one This is line two This is line three And so on... Or, if you prefer, you can retrieve an entire file into an array of lines: arr = IO.readlines("testfile") arr.
cheap jsp web hosting length » 4 arr[0] » "This is line one\n" Don't forget that I/O is never certain in an uncertain world---exceptions will be raised on most errors, and you should be ready to catch them and take appropriate action. Writing to Files So far, we've been merrily calling puts and print, passing in any old object and trusting that Ruby will do the right thing (which, of course, it does). But what exactly is it doing? The answer is pretty simple. With a couple of exceptions, every object you pass to puts and print is converted to a string by calling that object's to_s method. If for some reason the to_s method doesn't return a valid string, a string is created containing the object's class name and id, something like <ClassName:0x123456>.
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