fine tuning previous notes

Author: rohan-paul

Javascript/call-apply-bind/bind-why-its-needed.md

@@ -35,3 +35,5 @@ console.log(retrieveX()) // => 9 Because here the function gets invoked at the g
 const boundX = retrieveX.bind(obj)
 console.log(boundX()) // => 70
 ```
+### Further Reading
+[https://stackoverflow.com/questions/41391288/why-is-javascript-bind-necessary](https://stackoverflow.com/questions/41391288/why-is-javascript-bind-necessary)

Javascript/call-apply-bind/call-function-basics-1.md

@@ -2,7 +2,7 @@
 
 In JavaScript all functions are object methods.
 
-If a function is not a method of a JavaScript object, it is a function of the global object (see previous chapter).
+If a function is not a method of a JavaScript object, it is a function of the global object.
 
 ```js
 var person = {

Javascript/call-apply-bind/call-function-basics-2.md

@@ -48,7 +48,7 @@ obj.func.call(obj) // => undefined
 obj.func2.call(obj) // => 15, accessing the
 ```
 
-The first invocation of f() will display the value of 10, because this references the global object. The second invocation (via the call method) however, will display the value 15. 15 is the value of the x property inside object o.
+The first invocation of f() will display the value of 10, because this references the global object. The second invocation (via the call method) however, will display the value 15. 15 is the value of the x property inside object obj.
 
 ### The call() method invokes the function and uses its first parameter as the this pointer inside the body of the function. In other words - we've told the runtime what object to reference as 'this' while executing inside of function f().
 

Javascript/this-keyword/this-example-custom-Array-Prototype-method.md

@@ -16,7 +16,19 @@ console.log(a); // [1, 2, 3, 4, 5, 1, 4, 9, 16, 25]
     result.push(this[i] ** 2)
   }
   return [...this, ...result]
-} */
+} 
+*/
+
+/*
+[
+  1, 2, 3,  4,  5,
+  1, 4, 9, 16, 25
+]
+
+ */
+
+
+// Below will produce slightly different result, the last element will be NaN
 
 Array.prototype.multiply = function() {
   let result = []
@@ -29,4 +41,14 @@ Array.prototype.multiply = function() {
 let myArr = [1, 2, 3, 4, 5]
 
 console.log(myArr.multiply())
+/*
+[
+  1, 2,  3,  4,   5,
+  4, 9, 16, 25, NaN
+]
+
+ */
+
+
+
 ```