Generate all permutations of a list
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First post here. Tried to get the most minimalistic way to calculate the amount of permutations. The typical formula is:
n! = 1 * 2 * 3 ... * r * r + 1 * ... n
r! = 1 * 2 * 3 ... * r
But since every number between 1 and r is simplified, it's just a multiplication of the (x)range between r+1 and n.
Also as an example of lambda functions on python, and the reduce function, which takes every pair inside a list-type object and runs the function over them.
n! = 1 * 2 * 3 ... * r * r + 1 * ... n
r! = 1 * 2 * 3 ... * r
But since every number between 1 and r is simplified, it's just a multiplication of the (x)range between r+1 and n.
Also as an example of lambda functions on python, and the reduce function, which takes every pair inside a list-type object and runs the function over them.
2
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This module is a Python Library to support all IP2Location™ database products. It has been optimized for speed and memory utilization. Developers can use the API to qeury all IP2Location™ binary databases for applications written in Python.
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Sat. Apr. 22nd, 2006 11:17 AM 
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Utsawin
"ASP.NET 2.0" | combinations | factorials | math | permutations 
3 comments
Go easy on me, my first snippet - plus I am new to VB.NET 2.0... with only basic knowledge of classic VB... Just want to mention that the Permutations function is not actually mine - found it online... (credit where credit's due)
Fairly simple stuff, but had me pulling my hair out - Even Excel has a COMBI function out of the box!
Fairly simple stuff, but had me pulling my hair out - Even Excel has a COMBI function out of the box!
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