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Line 22: Line 22:  
function p.hashString(string)
 
function p.hashString(string)
 
local hash = 0
 
local hash = 0
 +
if string == nil or string == "" then
 +
return 0
 +
end
 
for i = 1, #string do
 
for i = 1, #string do
 
local letter = string:sub(i,i)
 
local letter = string:sub(i,i)
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