Cast string as array

Question

How, in Javascript, can I cast a string as an array in the same way that PHP (array) does.

//PHP
$array = (array)"string"

Basically I have a variable that can be an array or a string and, if a string, I want to make it an array using an inline command.

Answer 1

Hacky, but works:

[].concat(arrayOrString);

//Usage:
[].concat("a");
//["a"]
[].concat(["a"]);
//["a"]