Convert string with hex ASCII codes to characters

ruby ascii

You can use Array#pack:

["666f6f626172"].pack('H*')#=> "foobar"

H is the directive for a hex string (high nibble first).

ruby ascii

Stefan has nailed it, but here's an alternative you may want to tuck away for another time and place:

"666f6f626172".gsub(/../) { |pair| pair.hex.chr } # => "foobar"

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