Anonymous user
Add support for rounding to specified precsion
en>Dragons flight (add max and min) |
en>Dragons flight (Add support for rounding to specified precsion) |
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end
-- Determine order of magnitude
function z.precision( frame )▼
function z.order(frame)
return z._precision( frame.args[1] or frame.args.x or '0' )▼
return p._order(tonumber(frame.args[1] or frame.args.x or 0))
end
function z._order(x)
if x == 0 then return 0 end
return math.floor(math.log10(math.abs(x)))
end
-- Determines precision of a number using the string representation
▲function z.precision( frame )
▲ return z._precision( frame.args[1] or frame.args.x or '0' )
end
function z._precision( x )
x = string.upper( x )
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return min_value
end
-- Rounds a number to the specified precision and formats according to rules
-- originally used for {{template:Rnd}}
function z.round( frame )
-- For access to Mediawiki built-in formatter.
local lang = mw.getContentLanguage();
local value = tonumber( frame.args[1] or 0 );
local precision = tonumber( frame.args[2] or 0 );
local current_precision = p._precision( value );
-- If rounding off, truncate extra digits
if precision < current_precision then
local rescale = math.pow( 10, precision );
value = math.floor( value * rescale + 0.5 ) / rescale;
end
local formatted_num = lang:formatNum( value );
local order;
-- Handle cases requiring scientific notation
order = p._order( value );
if string.find( formatted_num, 'E', 1, true ) ~= nil or math.abs(order) >= 9 then
value = value * math.pow( 10, -order );
current_precision = current_precision + order;
precision = precision + order;
formatted_num = lang:formatNum( value );
else
order = 0;
end
-- Pad with zeros, if needed
if current_precision < precision then
if current_precision <= 0 then
local zero_sep = lang:formatNum( 1.1 );
formatted_num = formatted_num .. zero_sep:sub(2,2);
formatted_num = formatted_num .. string.rep( '0', precision );
else
formatted_num = formatted_num .. string.rep( '0', precision - current_precision );
end
end
-- Add exponential notation, if necessary.
if order ~= 0 then
formatted_num = formatted_num .. '<span style="margin:0 .15em 0 .25em">×</span>10<sup>' .. lang:formatNum(order) .. '</sup>'
end
return formatted_num;
end
return z
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