File.truncate : truncate « File Directory « Ruby

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Ruby » File Directory » truncate   File.truncate filename = 'truncate.txt' f = open(filename, 'w') do |f|   f << 'this is a test.' end File.size(filename)                File.truncate(filename, 30) File.size(filename)                open(filename) { |f| f.read }        Related examples in the same category 1.  Erase all existing content

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