toNum function

num? toNum(
  1. Object value
)

Converts value into a num.

If value is a String, it is parsed. If value is a num or Int64, it is converted to a double.

Otherwise, null is returned.

Implementation

num? toNum(Object value) {
  if (value is num) {
    return value;
  } else if (value is Int64) {
    return value.toDouble();
  } else if (value is String) {
    return double.tryParse(value);
  } else {
    return null;
  }
}