CODEWITHSUNDEEP
ruby
Eugene
Eugene

Reputation: 4879

String of hex characters to actual hex characters

I might be going about this the wrong way, and this might end up being a duplicate of something else.

I have a string that I need to convert into binary/hex.

This is what I am trying to do:

2.0.0p247 :050 > "test".unpack("H*").first
"74657374"

the 74657374 is the string of hex characters that I need, but I need them in actual hex, not a string.

How do I get this into \x74\x65\x73\x74?

I've tried packing the pairs of hex character, but they end up back in string form. My goal is to parse a bunch of strings into hex and then write them out to a file.

Upvotes: 0

Views: 137

Answers (1)

Patrick Oscity
Patrick Oscity

Reputation: 54674

You need to do nothing at all. "\x74\x65\x73\x74" is just another representation of "test". Try in IRB:

"\x74\x65\x73\x74" == "test"
#=> true

Also consider:

$ ruby -e "File.open('test.txt', 'w'){|f| f.write 'test'}"
$ hexdump test.txt
0000000 74 65 73 74
0000004

Upvotes: 3

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