Functions

ΠšΠΎΡ€ΠΎΡ‡ всС, ΠΊΠ°ΠΊ ΠΈ Π² Π΄Ρ€ΡƒΠ³ΠΈΡ… языках. ΠšΡ€Π°Ρ‚ΠΊΠΈΠ΅ ΠΏΡ€ΠΈΠΌΠ΅Ρ€Ρ‹:

isNoble(atomicNumber) {
  return _nobleGases[atomicNumber] != null;
}

bool isNoble(int atomicNumber) => _nobleGases[atomicNumber] != null;

Π˜ΠΌΠ΅Π½ΠΎΠ²Π°Π½Π½Ρ‹Π΅ ΠΏΠ°Ρ€Π°ΠΌΠ΅Ρ‚Ρ€Ρ‹

// ΠŸΡ€ΠΈ Π²Ρ‹Π·ΠΎΠ²Π΅ Ρ„ΡƒΠ½ΠΊΡ†ΠΈΠΉ, ΠΌΠΎΠΆΠ½ΠΎ ΠΈΡΠΏΠΎΠ»ΡŒΠ·ΠΎΠ²Π°Ρ‚ΡŒ ΠΈΠΌΠ΅Π½ΠΎΠ²Π°Π½Π½Ρ‹Π΅ Π°Ρ€Π³ΡƒΠΌΠ΅Π½Ρ‚Ρ‹
enableFlags(bold: true, hidden: false);
/// Sets the [bold] and [hidden] flags ...
void enableFlags({bool? bold, bool? hidden}) {...}
const Scrollbar({Key? key, required Widget child})

ΠΠ΅ΠΎΠ±ΡΠ·Π°Ρ‚Π΅Π»ΡŒΠ½Ρ‹Π΅ ΠΏΠ°Ρ€Π°ΠΌΠ΅Ρ‚Ρ€Ρ‹

String say(String from, String msg, [String? device]) {
  var result = '$from says $msg';
  if (device != null) {
    result = '$result with a $device';
  }
  return result;
}

ЗначСния ΠΏΠΎ ΡƒΠΌΠΎΠ»Ρ‡Π°Π½ΠΈΡŽ

/// Sets the [bold] and [hidden] flags ...
void enableFlags({bool bold = false, bool hidden = false}) {...}

// bold will be true; hidden will be false.
enableFlags(bold: true);

АнонимныС Ρ„ΡƒΠ½ΠΊΡ†ΠΈΠΈ

const list = ['apples', 'bananas', 'oranges'];
list.forEach((item) {
  print('${list.indexOf(item)}: $item');
});

list.forEach(
    (item) => print('${list.indexOf(item)}: $item'));

Замыкания

Function makeAdder(int addBy) {
  return (int i) => addBy + i;
}

var add2 = makeAdder(2);
var add4 = makeAdder(4);

assert(add2(3) == 5);
assert(add4(3) == 7);

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