Thank you, Jacob
On Wednesday, May 18, 2016 at 12:47:37 PM UTC-5, Jacob Quinn wrote: > > `countlines(file)` in Base should actually be just as fast as `wc`. > > But otherwise, you can do > > readall(`wc -l ratings.dat`) to capture all the output of a command (note > that this is `readstring(`wc -l ratings.dat`)` on 0.5) > > -Jacob > > > On Wed, May 18, 2016 at 11:43 AM, Douglas Bates <dmb...@gmail.com > <javascript:>> wrote: > >> I have forgotten how to capture the output from a shell command. The >> background is that the `wc` program on Linux (and, I assume, OS X) is an >> incredibly fast way to count the number of lines in a data file, as in >> >> julia> run(`wc -l ratings.dat`) >> 1000209 ratings.dat >> >> I want to capture that string and parse the number. >> > >
