Pastable version of Clumsy file I/O program

<pre class='prettyprint' language='ruby'>parameter, file, text = ARGV

if parameter == '-w' #=&gt; write mode
    File.open(file, 'w'){ text }
if parameter == '-r' #=&gt; read mode
    File.readlines(file).each{ text }
end</pre>
<pre class='prettyprint' language='ruby'>Example 1:
$ ./file.rb -w /home/usr/hello.rb &quot;puts 'hello, world'&quot;
$ ./file.rb -r /home/usr/hello.rb
puts 'hello, world'

Example 2:
$ ./file.rb -w /home/usr/hello.rb &quot;puts &quot;hello, world&quot;&quot;
$ ./file.rb -r /home/usr/hello.rb
puts hello

Example 3:
$ ./file.rb -w /home/usr/hello.rb &quot;puts 'hello, world!'&quot;
bash: !: event not found

Example 4:
$ ./file.rb -w /home/usr/hello.rb &quot;puts 'hello, world\!'&quot;
$ ./file.rb -r /home/usr/hello.rb 
puts 'hello, world\!'</pre>
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Pastable version of Clumsy file I/O program