Page 24 - Dart Language

}

For Loop

Two types of for loops are allowed:

for (int month = 1; month <= 12; month++) {
print(month);
}

and:

for (var object in flybyObjects) {
print(object);
}

The for-in loop is convenient when simply iterating over an Iterable collection. There is also a
forEach method that you can call on Iterable objects that behaves like for-in:

flybyObjects.forEach((object) => print(object));

or, more concisely:

flybyObjects.forEach(print);

Switch Case

Dart has a switch case which can be used instead of long if-else statements:

var command = 'OPEN';

switch (command) {
case 'CLOSED':
executeClosed();
break;
case 'OPEN':
executeOpen();
break;
case 'APPROVED':
executeApproved();
break;
case 'UNSURE':
// missing break statement means this case will fall through
// to the next statement, in this case the default case
default:
executeUnknown();
}

You can only compare integer, string, or compile-time constants. The compared objects must be
instances of the same class (and not of any of its subtypes), and the class must not override ==.

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