convertToBool static method

bool convertToBool(dynamic value)

Method to convert anything to a bool The following objects are considered as false:

• null
• 0 And 0.0
• double.nan "Not a Number" values
• "" Empty Strings
• [] Empty iterable objects
• <any>.isEmpty == true Whatever object with a isEmpty property that returns true (i.e, a Map or any custom class that implement isEmpty)

All other object values are considered as true

Implementation

static bool convertToBool(value) {
  if (value == null) {
    return false;
  }
  if (value is bool) {
    return value;
  }
  if ((value is String || value is Iterable || value is Map) &&
      value.isEmpty) {
    return false;
  }
  if (value is double && value.isNaN) {
    return false;
  }
  if (value is num && value.isFinite && value.toInt() == 0) {
    return false;
  }
  try {
    return !value.isEmpty;
  } catch (errorOnIsEmpty) {
    // Enpty on purpose
  }

  return true;
}