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create web page create web page IO#each_line calls the block with the next line from the file. In the next example, we'll make the original newlines visible using String#dump , so you can see that we're not cheating. aFile.each_line {|line| puts "Got #{line.dump}" } produces: Got "This is line one\n" Got "This is line two\n" Got "This is line three\n" Got "And so on.

create web page ..\n" You can pass each_line any sequence of characters as a line separator, and it will break up the input accordingly, returning the line ending at the end of each line of data. That's why you see the ``\n'' characters in the output of the previous example. In the next example, we'll use ``e'' as the line separator.

create web page aFile.each_line("e") do |line| puts "Got #{ line.dump }" end produces: Got "This is line" Got " one" Got "\nThis is line" Got " two\nThis is line" Got " thre" Got "e" Got "\nAnd so on...

create web page \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.foreach("testfile") { |line| puts line } produces: This is line one This is line two This is line three And so on.

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