Function Currying
What's the difference between the 'bind' method and currying in JavaScript?
The main difference is that bind allows partial application with a fixed 'this' context but doesn't transform the function's structure, while currying transforms a function's structure regardless of context. Function.prototype.bind() creates a new function with its 'this' keyword set to a specific value and can optionally pre-fill arguments, but it always returns a function with the same arity as the original minus the bound arguments. Currying, on the other hand, completely restructures a function to take one argument at a time, returning nested functions regardless of the original arity. While both enable partial application, they serve different primary purposes: bind for controlling execution context, currying for functional composition and flexible argument application.