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How do I convert a hex strign to its 32 bit signed int equivalent in ruby? for example
a = "fb6d8cf1" #hex string
[a].pack('H*').unpack('l') #from the documentation it unpacks to its 32 bit signed int
It converts to
-242455045
But the actual answer is
-76706575
Could you point me to what I am doing wrong?
818
To convert an string to a integer, we can use the built-in to_i method in Ruby. The to_i method takes the string as a argument and converts it to number, if a given string is not valid number then it returns 0.
Converting Strings to Numbers Ruby provides the to_i and to_f methods to convert strings to numbers. to_i converts a string to an integer, and to_f converts a string to a float.
Seems like you had an endian problem. This gives the desired result:
[a].pack("H*").unpack("l>")
# => [-76706575]
["038a67f90"].pack("H*").unpack("l>")
#=> [59402233]
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