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start a web hosting business openAndProcess("testfile", "r") do |aFile| print while aFile.gets end produces: This is line one This is line two This is line three And so on... This small example illustrates a number of techniques.
start a web hosting business The openAndProcess method is a class method---it may be called independent of any particular File object. We want it to take the same arguments as the conventional File.open method, but we don't really care what those arguments are. Instead, we specified the arguments as *args, meaning ``collect the actual parameters passed to the method into an array.'' We then call File.
start a web hosting business open, passing it *args as a parameter. This expands the array back into individual parameters. The net result is that openAndProcess transparently passes whatever parameters it received to File.open . Once the file has been opened, openAndProcess calls yield, passing the open file object to the block.
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