getAsDouble method
Retrieves the element of key
of type double from Map.
If Map does not have an element of key
or the type does not match double, orElse
is returned.
Implementation
double getAsDouble(K key, [double orElse = 0.0]) {
assert(key != null, "The key is empty.");
if (!containsKey(key) || this[key] is! num?) {
return orElse;
}
return (this[key] as num?)?.toDouble() ?? orElse;
}