Callbacks

Callbacks

Write a function, funcCaller, that takes a func (a function) and an arg (any data type). The function returns the func called with arg(as an argument).

var funcCaller = function(func, arg) {
	return func(arg);
}
Write a function, firstVal, that takes an array, arr, and a function, func, and calls func with the first index of the arr, the index # and the whole array.
var firstVal = function(arr, func){
	return func(arr[0], 0, arr);
}
Change firstVal to work not only with arrays but also objects. Since objects are not ordered, you can use any key-value pair on the object.
var firstVal = function(list, func) {

	if(Array.isArray(list)) {
		return func(arr[0], 0, arr);
	} else {
		for(var k in list){
			return func(list[k], k, list);
		}
	}
}