Use ‘tr -s’ to stripe out tabs? $ echo -e "a\t\t\tb" a b
$ echo -e "a\t\t\tb" | tr -s "\t" a b On Sep 10, 2014, at 11:28 AM, Dmitry Sivachenko <trtrmi...@gmail.com> wrote: > > On 10 сент. 2014 г., at 22:19, Rich Haase <rdha...@gmail.com> wrote: > >> You can write a custom output format > > > Any clues how can this can be done? > > > >> , or you can write your mapreduce job in Java and use a NullWritable as >> Susheel recommended. >> >> grep (and every other *nix text processing command) I can think of would not >> be limited by a trailing tab character. It's even quite easy to strip away >> that tab character if you don't want it during the post processing steps you >> want to perform with *nix commands. > > > Problem is that the line itself contains a TAB in the middle, there will not > be extra trailing TAB at the end. > So it is not that simple. > You never know if it is a TAB from the original line or it is extra TAB added > by TextOutputFormat. > > Thanks!
