Popular recipes tagged "reduce", "greatest" and "common"http://code.activestate.com/recipes/tags/reduce+greatest+common/popular/2010-07-06T18:52:55-07:00ActiveState Code RecipesFinding the GCD of a list of numbers (a.k.a. Reducing numbers in a list) (Python)
2010-07-06T18:52:55-07:00Stephen Akikihttp://code.activestate.com/recipes/users/4172143/http://code.activestate.com/recipes/577282-finding-the-gcd-of-a-list-of-numbers-aka-reducing-/
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Python
recipe 577282
by <a href="/recipes/users/4172143/">Stephen Akiki</a>
(<a href="/recipes/tags/common/">common</a>, <a href="/recipes/tags/denominator/">denominator</a>, <a href="/recipes/tags/gcd/">gcd</a>, <a href="/recipes/tags/greatest/">greatest</a>, <a href="/recipes/tags/lisst/">lisst</a>, <a href="/recipes/tags/reduce/">reduce</a>).
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<p><a href="http://akiscode.com/articles/gcd_of_a_list.shtml" rel="nofollow">http://akiscode.com/articles/gcd_of_a_list.shtml</a></p>
<p>This python code snippet allows you to find the GCD of a list of numbers, after this it is a simple matter of diving all the numbers in the list by the GCD to reduce it.</p>
<p>Why this works...</p>
<p>The GCD of a list of numbers [a, b, c] is GCD(GCD(a, b), c). The reduce function does exactly this and thus gives you the GCD of all the numbers in the list.</p>