You don't need all that fancy, modern stuff. A keyboard, a terminal window and the scala command are all you need:
$ scala -e 'println(io.Source.fromFile("freq_list.txt").getLines().map(_.split("\t")(0).toInt).sum)' 71213401(Prints the result of summing the frequency numbers found in the first tab separated field of file
freq_list.txt. The result turned out to be 71213401.)
When the programs get longer, you better stay focused.