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return {
split = require 'pl.utils'.split,
shuffle = function(t, seed)
if seed then math.randomseed(seed) end
local n = #t
while n >= 2 do
local k = math.random(n)
t[n], t[k] = t[k], t[n]
n = n - 1
end
return t
end,
urandom = function()
local f = io.open('/dev/urandom', 'rb')
if not f then return nil end
local s = f:read(4) f:close()
local bytes = {s:byte(1, 4)}
local value = 0
for _, v in ipairs(bytes) do
value = value * 256 + v
end
return value
end,
}
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