2754. Bind Function to Context π
Description
Enhance all functions to have the bindPolyfill
method. When bindPolyfill
is called with a passed object obj
, that object becomes the this
context for the function.
For example, if you had the code:
function f() { console.log('My context is ' + this.ctx); } f();
The output would be "My context is undefined"
. However, if you bound the function:
function f() { console.log('My context is ' + this.ctx); } const boundFunc = f.boundPolyfill({ "ctx": "My Object" }) boundFunc();
The output should be "My context is My Object"
.
You may assume that a single non-null object will be passed to the bindPolyfill
method.
Please solve it without the built-in Function.bind
method.
Example 1:
Input: fn = function f(multiplier) { return this.x * multiplier; } obj = {"x": 10} inputs = [5] Output: 50 Explanation: const boundFunc = f.bindPolyfill({"x": 10}); boundFunc(5); // 50 A multiplier of 5 is passed as a parameter. The context is set to {"x": 10}. Multiplying those two numbers yields 50.
Example 2:
Input: fn = function speak() { return "My name is " + this.name; } obj = {"name": "Kathy"} inputs = [] Output: "My name is Kathy" Explanation: const boundFunc = f.bindPolyfill({"name": "Kathy"}); boundFunc(); // "My name is Kathy"
Constraints:
obj
is a non-null object0 <= inputs.length <= 100
Can you solve it without using any built-in methods?
Solutions
Solution 1
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