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Created November 5, 2012 13:22
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a.rb
require 'digest/sha1'
filedata_hash = ["f5121cfb38da06e0c99dfe8fe2ed72655f5572a0"].pack('H*')
filename_hint = "test.java".ljust(256, "\x00")
# 283e4f1a02cb7e161acdc24196ac429f0687c4ef
puts Digest::SHA1.hexdigest(filedata_hash + filename_hint)
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