Module:Math: Difference between revisions
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en>Dragons flight No edit summary |
en>Dragons flight (add max and min) |
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local z = {} |
local z = {} |
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-- Generate random number |
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function z.random( frame ) |
function z.random( frame ) |
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first = tonumber(frame.args[1]) -- if it doesn't exist it's NaN, if not a number it's nil |
first = tonumber(frame.args[1]) -- if it doesn't exist it's NaN, if not a number it's nil |
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end |
end |
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-- Finds maximum argument |
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function z.max( frame ) |
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if frame.args[1] == nil then |
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return '' |
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end |
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local max_value = tonumber( frame.args[1] ) |
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local i = 2; |
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while frame.args[i] ~= nil do |
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local val = tonumber( frame.args[i] ); |
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if val ~= nil then |
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if val > max_value then |
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max_value = val; |
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end |
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end |
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i = i + 1; |
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end |
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return max_value |
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end |
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-- Finds minimum argument |
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function z.min( frame ) |
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if frame.args[1] == nil then |
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return '' |
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end |
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local min_value = tonumber( frame.args[1] ) |
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local i = 2; |
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while frame.args[i] ~= nil do |
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local val = tonumber( frame.args[i] ); |
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if val ~= nil then |
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if val < min_value then |
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min_value = val; |
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end |
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end |
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i = i + 1; |
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end |
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return min_value |
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end |
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return z |
return z |
Revision as of 17:06, 21 February 2013
Documentation for this module may be created at Module:Math/doc
local z = {}
-- Generate random number
function z.random( frame )
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])
if first then -- if NaN or nil, will skip down to final return
if first <= second then -- could match if both nil, but already checked that first is a number in last line
return math.random(first, second)
end
return math.random(first)
end
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 )
-- Remove leading / trailing whitespace
x = x:match "^%s*(.-)%s*$";
local decimal = string.find( x, '.', 1, true )
local exponent_pos = string.find( x, 'E', 1, true )
local result = 0;
if exponent_pos ~= nil then
local exponent = string.sub( x, exponent_pos + 1 )
x = string.sub( x, 1, exponent_pos - 1 )
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
end
return result
end
-- Finds maximum argument
function z.max( frame )
if frame.args[1] == nil then
return ''
end
local max_value = tonumber( frame.args[1] )
local i = 2;
while frame.args[i] ~= nil do
local val = tonumber( frame.args[i] );
if val ~= nil then
if val > max_value then
max_value = val;
end
end
i = i + 1;
end
return max_value
end
-- Finds minimum argument
function z.min( frame )
if frame.args[1] == nil then
return ''
end
local min_value = tonumber( frame.args[1] )
local i = 2;
while frame.args[i] ~= nil do
local val = tonumber( frame.args[i] );
if val ~= nil then
if val < min_value then
min_value = val;
end
end
i = i + 1;
end
return min_value
end
return z