I'm trying match the lines that starting with someone variable in 's' These sentences: if max(map(ln.startswith,s)): reduce(lambda m,n:m or n, map(ln.startswith, s)):
were said me in #python for this proposal. Alan G wrote: > Sorry Jonas, > > I don't understand what you are trying to do at all. > The subject line and your code snippets don't seem to match up. > >> Subject: [Tutor] iterating in the same line > > >> I would check 3 words at the starting of a line >> >> s=['foo','bar','qwe'] >> >> if ln.startswith(s): (this is bad) > > > Why is it bad -- other than it doesn't work! > I think you mean something like > > for st in s: > if line.startswith(st): do something > >> if max(map(ln.startswith,s)): > > > But this does something completely different! > > This selects the 'biggest' line that starts with anything in s. > then if the biggest line is not null does something? > >> reduce(lambda m,n:m or n, map(ln.startswith, s)) > > > And this does something different again. > It uses map to create a list containg ln if ln startswith one of the > strings in s, then tries to reduce that list to one element(which it > already is!) by 'or'ing the elements. > > I can't even begin to guess from that what it is you are actually > trying to do. > > Can you give us more explanation and maybe some sample data? > > Alan G. > > _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
