toDouble static method

double? toDouble(
  1. dynamic v, {
  2. double? defaultValue,
})

Implementation

static double? toDouble(v, {double? defaultValue}) {
  if (v == null) return defaultValue;
  if (v is double) return v;
  if (v is num) return v.toDouble();
  if (v is String) return double.tryParse(v) ?? defaultValue;
  if (defaultValue != null) return defaultValue;
  throw Exception('Trying to convert a non-double to double!');
}