Question

Is there an equivalent construct in Javascript. If not, how would you create one?

Here’s a straightforward explanation of what the infix operator does in Haskell:

What does the : infix operator do in Haskell?

Answer 1

JavaScript doesn’t have a list type, but it has Arrays.

You can use…

var newArr = [val].concat(arr);

Alternatively, you could use unshift() to prepend to an array, but it mutates the original.

JavaScript doesn’t have a : operator, operator overloading or methods that look like operators, so you can’t get a similar syntax as Haskell.