protoParseInt method

int protoParseInt(
  1. dynamic a
)

Implementation

int protoParseInt(a) {
  if (a.length == 0) {
    return -1;
  }
  int n = 0;
  for (int i = 0; i < a.length; i++) {
    if (a[i] < 48 || a[i] > 57) {
      return -1;
    }
    int val = (a[i] - 48);
    n = n * 10 + val;
  }
  return n;
}