Is there a C#-like lambda syntax in JavaScript?

Question

Is there a framework or post processor for JavaScript that supports lambda syntax like in C#?

Function definitions in CoffeeScript seem to look like lambdas but I have not looked into them thoroughly.

Can anyone tell me, can I use lambda syntax in JavaScript?

Answer 1

Lambda functions with similar syntax are included in ECMAscript 6, they're known as "arrow functions". An example:

["duck", "cat", "goat"].filter(el => el.length > 3); returns ["duck", "goat"]

There's currently support in recent versions of Firefox and Chrome.

To use this syntax in JavaScript that's targeting older browsers there are tools that can compile ES 6 to a more widely supported version - for example the tools Babel or Traceur.

Answer 2

You could use typescript (www.typescriptlang.org/):

function (d, i) {     return "translate(" + d.x + "," + d.y + ")"; } 

would become

(d, i) =>  "translate(" + d.x + "," + d.y + ")"   

and much more cool stuff, like typing: ... that's if you are into that