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The first approach involves augmenting the Function prototype to add our custom callPolyfill method. This method should simulate the behavior of the native Function.prototype.call method. We'll save the original context of this, invoke our function with the given context, and apply the additional arguments.
Time Complexity: O(1) — The time to set a property and invoke a function is constant.
Space Complexity: O(1) — Space used is constant because no structures grow with input size.
1Function.prototype.callPolyfill = functionIn this solution, we temporarily assign the function to be called as a property of the context object using a symbol to avoid potential property name clashes. We then call the function using this set context and pass the function arguments using the spread operator. After calling the function, we delete the temporary property to clean up.
This approach leverages closures to encapsulate the function call logic. By using an immediately invoked function expression (IIFE), we can create a local scope that captures the context and arguments for the function call.
Time Complexity: O(1) — Function invocation is a constant time operation.
Space Complexity: O(1) — No additional space is required.
1Function.prototype.callPolyfill = function(obj, ...args) {
2 return (() => this.apply(obj, args))();
3};This solution wraps the call to this.apply within an arrow function, effectively using a closure to capture the current function, context, and arguments. The function is immediately invoked to simulate a direct call.