Hi Uri, Jim, Thanks for the help, it is a very small file some 8kB in size.
Jim's supplied command worked perfectly, although I really do not understand it being a 1 day old perl "want-a-be" LOL I guess have allot of learning to do, can anyone suggest a good starting point books or online courses for true newbies. Thanks again for your help, Vaughan On Wed, 2010-07-21 at 15:06 -0400, Uri Guttman wrote: > >>>>> "VW" == Vaughan Williams <vaughan...@gmail.com> writes: > > VW> Hi all, > VW> I'm hope you all could help me with a very simple question. > > VW> I have a multi line text file laid out as below. > > VW> 10.10.10.45 bobs > VW> 10.10.10.34 jims > VW> 10.10.10.27 jacks > VW> ..... > VW> ..... > > VW> I would like to that the 10.10.10.??? and move it to the end of the same > VW> line so the output will look like. > > VW> bobs 10.10.10.45 > VW> jims 10.10.10.34 > VW> jacks 10.10.10.27 > > ok, that is a simple enough problem. what have you tried so far? i could > quickly write a one liner but that wouldn't teach you much. this list is > about learning perl, not getting programs (however simple) written for > you. so i will walk through the ideas needed and you should be able to > code them up. > > first off you need to read in the file. this can be done line by line or > as the whole file if it is small enough (and small is megabytes these > days). given this is some form of hosts file (a good guess) it will be > small enough. so write code to read it in and loop over each line. > > the next step is to flip the fields. this can be done many different > ways. you first need to get the 2 parts and then recombine them in the > other order. split or a regex will get the parts for you. either is easy > enough to code up even for a newbie but split would be simpler i > think. > > then combining those 2 parts back into a line is very easy and can be > done with a simple "" string. > > the final step is just printing out the lines. you can print them to > stdout (default for print) and save the output into a file with a shell > redirect (>). or you could open the file in perl (before the loop!) and > print each line to that. again, this is easy perl. > > so each step is very easy. do them all and you will have a working perl > program that does what you want. if you get stuck, write back to the > list and show the code and explain your problem. > > thanx, > > uri > -- To unsubscribe, e-mail: beginners-unsubscr...@perl.org For additional commands, e-mail: beginners-h...@perl.org http://learn.perl.org/
