a possibly foolish question about slices

David Eppstein eppstein at ics.uci.edu
Fri Jun 14 21:08:25 CEST 2002


In article <yu99sn3prbqm.fsf at europa.research.att.com>,
 Andrew Koenig <ark at research.att.com> wrote:

> Suppose x is a string or list, and I want to refer to
> a subsequence of x with length n starting at position p.
> under the assumption that this subsequence is entirely
> 
> To do so, I can use x[p:p+n] in all circumstances but one,
> namely when p < 0 and p == -n.  Is there a similarly concise
> expression that works even in this special case?

x[p:][:n]

-- 
David Eppstein       UC Irvine Dept. of Information & Computer Science
eppstein at ics.uci.edu http://www.ics.uci.edu/~eppstein/



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