Flowdock
truncate(p1, p2) public

Truncates the file file_name to be at most integer bytes long. Not available on all platforms.

   f = File.new("out", "w")
   f.write("1234567890")     #=> 10
   f.close                   #=> nil
   File.truncate("out", 5)   #=> 0
   File.size("out")          #=> 5
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