Function forEach

src/CSV.ts:178–211

(
  input: string,
  sep: Comma | ForEachCallback,
  quo?: Quote | ForEachCallback,
  callback?: ForEachCallback
)

  callback: ForEachCallback
): void;
function forEach(
  input: string,
  sep: Comma | ForEachCallback,
  quo?: Quote | ForEachCallback,
  callback?: ForEachCallback
): void {
  if (callback === undefined) {
    if (quo === undefined) {
      // arguments.length < 3) {
      if (typeof sep !== 'function') {
        throw Error('Last/second argument is not a callback');
      }
      callback = sep;
      sep = ',';
    } else {
      // arguments.length < 4) {
      if (typeof quo !== 'function') {
        throw Error('Last/third argument is not a callback');
      }
      callback = quo;
      quo = '"';
    }
  }
  let i = 0;
  let s = 0;
  let r: number;
  while (
    (r = read(input.slice(s), sep as Comma, quo as Quote, (fields) =>
      (callback as ForEachCallback)(fields, i++)
    ))
  ) {
    s += r;
  }
}

function readAll(input: string, callback: ReadAllCallback): number;
function readAll(input: string, sep: Comma, callback: ReadAllCallback): number;