Talk:Largest int from concatenated ints

Negative integers

These programs look like they can't handle negative integers. I don't know how to concatenate two integers if the second one is negative; "4" "-5" => "4-5" is not an integer. Perhaps the task should specify positive integers? Or non-negative integers, if "0" is allowed? --Kernigh (talk) 00:38, 4 April 2013 (UTC)

Yep. I'm sloppy. I will fix this.Paddy3118 (talk) 05:51, 4 April 2013 (UTC)

Duplicates?

Paddy3118, please clarify whether the list may or may not include duplicates. --Nigel Galloway (talk) 11:02, 4 April 2013 (UTC) PS where have the edit buttons gone?

Hi Nigel. Duplicates are not excluded. P.S. I assumed that the edit buttons were a (short term) casualty of the MW upgrade. Paddy3118 (talk) 16:09, 4 April 2013 (UTC)

The Haskell entry that uses cycle goes in infinite loop if you feed it with numbers like 10 and 1010.-bearophile (talk)

On "Python: Compare repeated string method" Second entry for Python 2.6

Hi Spoon, Is it the case that the first entry does not work on Python 2.6:

<lang python>def maxnum(x):

   maxlen = len(str(max(x)))
   return .join(sorted((str(n) for n in x), reverse=True,
                         key=lambda i: i*(maxlen // len(i) + 1)))</lang>

The second version seems to be quite complex - using Fractions and logs, and although I do not have a version of Python 2.6 to hand, I cannot think of what of the above would break 2.6?

Here's your second version:

<lang python>from fractions import Fraction

from math import log10

def maxnum(x):

   return .join(str(n) for n in sorted(x, reverse=True,
                         key=lambda i: Fraction(i, 10**(int(log10(i))+1)-1)))</lang>

(P.S. thanks for catching my maxnumx errors)! --Paddy3118 (talk) 06:19, 6 April 2013 (UTC)