doukaku209.groovy

String fun(String fpath, List mods, Closure sorter){
  def r = new File(fpath).text.trim().split(/\r?\n/)*.tokenize('\t')
  mods.each{ r.(it.maximumNumberOfParameters==2?'eachWithIndex':'each') it }
  [r.head(), *r.tail().sort(sorter)]*.join('\t').join('\n')
}
print fun('data.csv', [
  { it[0..3] = it[0, 2, 1, 3] },
  { a, i -> if(i){ [0, 3].each{ a[it] = a[it].toInteger() }; ++a[3] } },
]){ it[0] }