On: This will make some people mad (JS/Dart)

[_greim_]

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.