getColumnIndex static method

int getColumnIndex(
  1. String label
)

Converts A1 notation letter label into column index A -> 1 B -> 2 AA -> 27

Implementation

static int getColumnIndex(String label) {
  final chars = label.split('');
  var res = 0;
  for (final char in chars) {
    res *= 26;
    res += 1 + char.codeUnitAt(0) - _charCodeUnitA;
  }
  return res;
}