Anonymous user
Add precision calculation
en>Banaticus (created random module) |
en>Dragons flight (Add precision calculation) |
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Line 1:
local
function
first = tonumber(frame.args[1]) -- if it doesn't exist it's NaN, if not a number it's nil
second = tonumber(frame.args[2])
Line 13:
return math.random()
end
function z.precision( frame )
return z._precision( frame.args[1] or frame.args.x or '0' )
end
-- Determines precision of a number using the string representation
function z._precision( x )
x = string.upper( x )
local decimal = string.find( x, '.', 1, true )
local exponent = string.find( x, 'E', 1, true )
local result = 0;
if exponent ~= nil then
exponent = string.sub( x, exponent + 1 )
x = string.sub( x, 0, exponent )
result = result - tonumber( exponent )
end
if decimal ~= nil then
result = result + string.len( x ) - decimal
return result
end
local pos = string.len( x );
while x:byte(pos) == string.byte('0') do
pos = pos - 1
result = result - 1
if pos <= 0 then
return 0
end
if x:byte(pos) == string.byte('.') then
pos = pos - 1
end
end
return result
end
return z
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