IO: sketch that tests different methods for reading data from files one byte at a time.

gistfile1.rb

# filename: files_bytes.rb
# sketch that tests different methods for reading data from files one byte at a time.

# open file to read
puts
puts "Creating a reference to file input stream"
f = File.new("../chapter_11/regex_scan.rb")

# find out what approach to use to read the file
puts "Select a byte-based approach to read the file:"
puts "	1) getc method"
puts "	2) getbyte method"
puts "	3) readchar method"
puts "	4) readbyte method"
input = STDIN.gets.to_i
puts

# if input was 1 then getc read method
if input == 1
	puts "** GETC method: \"print char while (char = f.getc)\"\n"
	char = ""
	print char while (char = f.getc)

# if input was 2 then getbyte each method
elsif input == 2
	puts "** GETBYTE method: \"print char while (char = f.getbyte)\" \n"
	char = ""
	print char while (char = f.getbyte)

# if input was 3 then readchar get method
elsif input == 3
	puts "** READCHAR method: \"print char while (char = f.readchar)\"\n"
	line = ""
	char = ""
	print char while (char = f.readchar)

# if input was 4 then use readbyte method
elsif input == 4
	puts "** READBYTE method: \"print char while (char = f.readbyte)\"\n"
	line = ""
	char = ""
	print char while (char = f.readbyte)

# if input did not match then display error message
else 
	puts "** ERROR: your input didn't make sense"
end

puts

# close the file
f.close