01e5a4e45f
git-subtree-dir: lrthw-remnants git-subtree-mainline:f2380eef05git-subtree-split:2b0a814a17
36 lines
585 B
Ruby
36 lines
585 B
Ruby
input_file = ARGV.first
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def print_all(f)
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puts f.read
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end
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def rewind(f)
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f.seek(0, IO::SEEK_SET)
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end
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def print_a_line(line_count, f)
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puts "#{line_count} #{f.readline}"
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end
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current_file = File.open(input_file)
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puts "First let's print the whole file:"
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puts # a blank line
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print_all(current_file)
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puts "Now let's rewind, kind of like a tape."
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rewind(current_file)
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puts "Let's print three lines:"
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current_line = 1
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print_a_line(current_line, current_file)
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current_line += 1
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print_a_line(current_line, current_file)
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current_line += 1
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print_a_line(current_line, current_file)
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