Scala Gems #4: Generating Data Matrices

Generating matrix-shaped test data is easy in any spreadsheet application: Enter a few cell values and use the fill handle to complete all others. But firing up a spreadsheet somehow feels lame. This Scala three-liner can do the same:

println(Array.fill(7, 3)("X").map(
  _.mkString("\t")).mkString("\n")
)

Is it readable? No. Is it handy? Yes!