Example

index.js

var func = function(a, b) {
   console.log(“funcLength is”, this.length);
   var totalArgs = Array.prototype.slice.call(arguments, 0);
   console.log(“, totalArgs is”, totalArgs.length);
}

func.call(func, [1]); // Output: funcLength is 2, totalArgs is 1
func.call(func, [1, 2, 3]); // Output: funcLength is 2, totalArgs is 3