If you provide skipFirstRow: true and columns, the first line will be skipped. If you provide skipFirstRow: true but not columns, the first line will be skipped and used as header definitions.

If you provide string[] or ColumnOptions[], those names will be used for header definition.

Parse function for rows. Example:

    import { parse } from "./csv.ts";
    const r = await parse('a,b,c\ne,f,g\n', {
     columns: ["this", "is", "sparta"],
      parse: (_e: unknown) => {
        const e = _e as { this: unknown, is: unknown, sparta: unknown };
        return { super: e.this, street: e.is, fighter: e.sparta };
      }
    });
// output
// [
//   { super: "a", street: "b", fighter: "c" },
//   { super: "e", street: "f", fighter: "g" }
// ]