function-binding

We have this line in my code base: var uncurryThis = Function.bind.bind(Function.call); That I'm trying to work through. Presumably, it uncurries. How do I work this out? I guess it's a version of Function.bind whose own this is bound to Function.call . Doesn't help me enough. And I haven't found any uses, so I'm not even sure if you call it standalone or need to call it "as a method", only, you know, bind it first. It passes the call function to the bind function, with the bind function itself being the value of this . Thus you get in return a wrapper around the bind function that arranges

It seems to me that, in ES6, the following two functions are very nearly identical: function () { return this; }.bind(this); () => { return this; }; The end result seems the same: arrow functions produce a JavaScript function object with their this context bound to the same value as the this where they are created. Obviously, in the general sense, Function.prototype.bind is more flexible than arrow functions: it can bind to values other than the local this , and it can bind any function's this at any point in time, potentially long after it is initially created. However, I'm not asking how