Module:Utils: Difference between revisions
m Forgot p |
+gcd function |
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| Line 1: | Line 1: | ||
local getArgs = require('Module:Arguments').getArgs | local getArgs = require('Module:Arguments').getArgs | ||
local p = {} | local p = {} | ||
-- check if a table contains x | -- check if a table contains x | ||
function p.table_contains(tbl, x) | function p.table_contains(tbl, x) | ||
| Line 54: | Line 54: | ||
b = p.eval_num_arg(b, 2) | b = p.eval_num_arg(b, 2) | ||
return math.log(x)/math.log(b) | return math.log(x)/math.log(b) | ||
end | |||
-- return greatest common divisor of a and b | |||
function p.gcd(frame) | |||
local args = getArgs(frame) | |||
return p._gcd(args[1], args[2]) | |||
end | |||
function _gcd(a, b) | |||
if b ~= 0 then | |||
return _gcd(b, a % b) | |||
else | |||
return math.abs (a) | |||
end | |||
end | end | ||