github.com/benhoyt/goawk@v1.8.1/testdata/gawk/setrec1.awk (about)

     1  function reassign(x, y) {
     2     $0 = x
     3     print y
     4  }
     5  
     6  BEGIN {
     7     $0 = substr("geronimo", 5, 3)
     8     reassign(" 52", $1)
     9  }