Wednesday, 28 September 2011

Programming Scala without... anything

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)'
(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.