MatchReader

abstract class CsvFileReader<T> {
  data: T[] = []

  constructor(public file: string) {}

  abstract mapRow(row: string[]): T

  read() {
    this.data = this.file
      .split('\n')
      .map((row: string): string[] => {
        return row.split(',')
      })
      .map(this.mapRow)
  }
}

type matchData = [string, string, string, number, number, string]

class MatchReader extends CsvFileReader<matchData> {
  mapRow(row: string[]): matchData {
    return [
      row[0],
      row[1],
      row[2],
      +row[3],
      +row[4],
      row[6],
    ]
  }
}

const reader = new MatchReader("a,b,c,15,7,-,X");
reader.read();
console.log(reader);