Dart's operator overloading alone makes it easier to write clear and concise code than in JS, e.g. for map and list types. // dart var listA = listB +

Dart's operator overloading alone makes it easier to write clear and concise code than in JS, e.g. for map and list types. // dart var listA = listB + listC; // js var listA = listB.concat(listC); That's just the tip of the iceburg. Overriding the [] accessor for custom list types opens up whole worlds of possibilities.