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Module:Number: Difference between revisions
Add magical autoround function
m (Fix parameter naming) |
(Add magical autoround function) |
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| Line 16: | Line 16: | ||
d = 1e30 | d = 1e30 | ||
} | } | ||
local function sigfig(x, p) | |||
local x_sign = x < 0 and -1 or 1 | |||
local x = math.abs(x) | |||
local n = math.floor(math.log10(x)) + 1 - p | |||
return x_sign * math.pow(10, n) * p.round2(x / math.pow(10, n), 0) | |||
end | |||
-- Automatically rounds to 2 places from the significant figure. | |||
-- Taken from RSWiki. | |||
function p.autoround(x) | |||
x = tonumber(x) or 0 | |||
local _x | |||
if x == 0 then | |||
_x = 0 | |||
elseif math.abs(x) < 0.1 then | |||
_x = sigfig(x, 2) | |||
elseif math.abs(x) > 999 then | |||
_x = p.round2(x, 0) | |||
else | |||
_x = p.round2(x, 2) | |||
end | |||
return _x | |||
end | |||
--- Formats a number by inserting commas as thousand separators. | --- Formats a number by inserting commas as thousand separators. | ||
-- @param number (number or string) The number to format. | -- @param number (number or string) The number to format. | ||