Created
August 2, 2010 13:14
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# The Ruby version | |
VBUCKET_COUNT = 4096 | |
def keyToVBucket(key) | |
b = 27183 | |
a = 31415 | |
vbucket = 0 | |
(0...key.length).each do |i| | |
vbucket = (a * vbucket + key[i]) % VBUCKET_COUNT | |
a = ((a % VBUCKET_COUNT) * (b % VBUCKET_COUNT)) % VBUCKET_COUNT | |
end | |
vbucket | |
end | |
# The CoffeeScript version | |
VBUCKET_COUNT: 4096 | |
keyToVBucket: (key) -> | |
b: 27183 | |
a: 31415 | |
vbucket: 0 | |
for i in [0...key.length] | |
vbucket: (a * vbucket + key[i].charCodeAt()) % VBUCKET_COUNT | |
a: ((a % VBUCKET_COUNT) * (b % VBUCKET_COUNT)) % VBUCKET_COUNT | |
vbucket | |
# some sample data (each line is a key, and should hash to the same vbucket in both implementations) | |
hnda884rmgff8w8m4 | |
62dldpvrp0lf7ox2b | |
y6fj1g2kusa1gwnqp | |
0s1787s216oqqc9oi | |
fuqv9nlays7a827tw | |
lu9j9b8t54rcif2lo | |
xsq22bcoxu89xvnss | |
3jxojo76vamt5g6ob | |
cklrclbwqwv6lpis2 | |
qk6slltxbcrfw9efi | |
xushlx4sqkyt19hfo | |
6xgjqm56fi2q9y827 | |
bxn5edn3gbdc5r5fx | |
i8w1vftjnk2sxis4j | |
brh2hxjm9q7hxydhs | |
al3h3f9ix05xgoqia | |
xdbfmg9fdeors6oej | |
2pgscyx349ei1pspv | |
ip38uef9x17wk51s5 | |
2vnx6oxi1t09k4ffn | |
k3xa5yq7mw66qoj5o | |
h8pu5q6dsiq2xg7xa | |
3bajwfuvdw76klkaj | |
5dobp9mhd46bqmixt | |
b8c1eq42dealehwo5 | |
7xqsretixsogdv6qy | |
bhc96bs72iqdr074i |
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