how do we encode each byte as two hexadecimal characters in ruby?

I have a hexadecimal number as

hexMidAppId = '0001000000000002'

In node.js, we have a library new Buffer(hexMidAppId, 'hex') which gives me the output as

<Buffer 00 01 00 00 00 00 00 02>

now the same output i want to get it in ruby but i couldn't find any equivalent method in ruby for the Buffer method. Can anyone help me this?

via Chebli Mohamed