Cause I have to write bytes string using Ruby.
I collation some rules of chr() to clarify my mind.
At first. create new file.
file = File.new("helloRuby", "w+")
There are three way to get the same result :
file.write(65.chr)
file.write(Integer(0x41).chr)
file.write("A")
upon three all get the hexdump result like :
00000000 41 |A|
And if using String.hex , ruby will write the string of hex number to file
file.write("A".hex)
00000000 31 30 |10|
Then, if I want to write the real hex byte to file.
I can using
file.write("A".hex.chr)
file.write(Integer(10).chr)
00000000 0a 0a |..|
Important note :
chr() of Number form and chr() of String form will get the different result !
