Ternary

Dart uses the exact ternary syntax as javascript. Very useful when in modern, component-based apps that conditionally render elements. I get a ton of use out of this in Flutter.

bool bullseye = true
var gameOver = bullseye ? 'Game over, you win!' : 'throw again'
var formInput = form.isEditable 
  ? return (/* DOM Input Element */)
  : return (/* Disabled Input Element*/)