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1-hoisting/README.md

@@ -18,6 +18,26 @@ function sayHello(name) {
 let message = sayHello(username);
 var nextMessage = sayHello('Test');
 ```
+//- re-write 
+```js
+// Declaration Phase 
+username = undefined;
+brother;
+
+function sayHello(name){
+  return `Hello ${name}`
+}
+message;
+nextMessage = undefined;
+
+ // Execution Phase 
+ username = 'Arya';
+ brothers =  ['John', 'Ryan', 'Bran'];
+ console.log(username, brothers[0]); // 'Arya', 'John';
+
+message = sayHello(username);
+nextMessage = sayHello('Test');
+```
 
 2.
 
@@ -35,6 +55,22 @@ let message = sayHello(username);
 var nextMessage = sayHello('Test');
 ```
 
+```js
+// Declaration Phase
+
+username = undefined;
+number; 
+function sayHello(name){
+  return `Hello ${name}`;
+}
+message;
+nextMessage = undefined;
+
+Execution Phase 
+console.log(username, number); // ReferenceError: Can not access 'number before initialization
+
+```
+
 3.
 
 ```js
@@ -51,6 +87,19 @@ let message = sayHello(username);
 var nextMessage = sayHello('Test');
 ```
 
+```js 
+// Declaration Phase
+username;
+number;
+sayHello;
+message;
+nextMessage = undefined;
+
+//Execution Phase
+
+console.log(username, number) // ReferenceError: Cannot access 'username' before initialization
+```
+
 4.
 
 ```js
@@ -67,6 +116,19 @@ let sayHello = function (name) {
 var nextMessage = sayHello('Test');
 ```
 
+```js
+// Declaration Phase
+username = 'Arya';
+number = 21;
+message;
+sayHello;
+nextMessage = undefined;
+
+//Execution Phase
+username = 'Arya';
+console.log(username,number) // ReferenceError: Cannot access 'number' before initialization
+```
+
 5.
 
 ```js
@@ -75,7 +137,13 @@ console.log(age);
 var name = 'Lydia';
 let age = 21;
 ```
-
+```js 
+name = undefined;
+age;
+// Execution Phase 
+console.log(name) // undefined
+console.log(age) // ReferenceError: Cannot access 'age' before initialization
+```
 6.
 
 ```js
@@ -87,6 +155,28 @@ function sayHi(name) {
 }
 
 sayHi();
+```
+```js
+// Declaration Phase
+function sayHi(name){
+ console.log(name);
+ console.log(age);
+ var name = 'Lydia';
+ let age = 21
+}
+
+//Execution Phase
+
+//F.E.C
+
+//D
+name = undefined;
+age;
+
+//Execution Phase
+console.log(name) // undefined
+console.log(age) // ReferenceError: Cannot access 'age' before initialization
+
 ```
 
 6.
@@ -101,6 +191,24 @@ function sayHi(name) {
 }
 ```
 
+```js 
+// Declaration Phase
+function sayHi(name) {
+  console.log(name);
+  console.log(age);
+  var name = 'Lydia';
+  let age = 21;
+}
+//Execution Phase
+//F.E.C
+//Declaration Phase
+name = undefined;
+age;
+
+//Execution Phase
+ console.log(name) // undefined;
+ console.log(age) // ReferenceError: Cannot access 'age' before initialization
+```
 7.
 
 ```js
@@ -112,14 +220,43 @@ let sayHi = function sayHi(name) {
   let age = 21;
 };
 ```
-
+```js 
+// Declaration Phase
+function sayHi(name) {
+  console.log(name);
+  console.log(age);
+  var name = 'Lydia';
+  let age = 21;
+}
+//Execution Phase
+//F.E.C
+//Declaration Phase
+name = undefined;
+age;
+
+//Execution Phase
+ console.log(name) // undefined;
+ console.log(age) // ReferenceError: Cannot access 'age' before initialization
+```
 8.
 
 ```js
 let num1 = 21;
 console.log(sum);
 var sum = num1 + num2;
 let num2 = 30;
+```
+```js
+//Declaration Phase
+
+num1;
+sum = undefined;
+num2;
+
+//Execution Phase
+num1 = 21;
+// ReferenceError: num2 is not defined
+
 ```
 
 9.
@@ -132,14 +269,54 @@ let sum2 = addAgain(num1, num2, 4, 5, 6);
 let add = (a, b, c, d, e) => {
   return a + b + c + d + e;
 };
-function addAgian(a, b) {
+function addAgain(a, b) {
   return a + b;
 }
 let num2 = 200;
 
 let sum = add(num1, num2, 4, 5, 6);
 ```
 
+```js 
+
+num1 = undefined;
+sum2;
+add;
+function addAgain(){
+  return a + b;
+}
+num2;
+sum;
+//Execution Phase
+num1 = 21;
+sum2 = // function call
+ // F.E.C sum2
+ //F.E.C D
+  a = undefined;
+  b = undefined;
+  //
+ //F.E.C E
+ a = 21;
+ b = num2;
+ // num2 is not defined
+
+add = // function call
+//F.E.C
+//Declaration Phase
+    a = undefined;
+    b = undefined;
+    c = undefined;
+    d = undefined;
+    e = undefined;
+  // Execution Phase
+  a = 21;
+  b=200;
+  c=4;
+  d=5;
+  e=6;
+  return a+b+c+d+e // 236
+sum = 236;
+```
 10.
 
 ```js
@@ -155,6 +332,27 @@ let add = (a, b) => {
 };
 ```
 
+```js
+// Declaration Phase
+function test(a) {
+  let num1 = 21;
+  return add(a, num1);
+}
+sum;
+add;
+// Execution Phase
+sum = //function call
+  // F.E.C
+  // F.E.C D
+  a = undefined;
+  b = undefined;
+   // F.E.C E
+  a = 100;
+  b = 21; 
+  return // 121
+
+
+ ```
 11.
 
 ```js
@@ -169,3 +367,27 @@ function add(a, b) {
   return a + b;
 }
 ```
+```js
+// Declaration Phase
+function test(a) {
+  let num1 = 21;
+  return add(a, num1);
+}
+sum;
+function add(a, b) {
+  return a + b;
+}
+// Execution Phase
+sum = //function call
+  //F.E.C
+  //F.E.C D
+  a = undefined;
+  num1;
+
+  // F.E.C E
+  a = 100;
+  num1 = 21;
+  return 121
+
+sum = 121
+```

2-higher-order-functions/eloquent/exercise.js

@@ -2,20 +2,38 @@
 let arrays = [[1, 2, 3], [4, 5], [6]];
 
 // Your code here.
+arrays.reduce((a, c) => a.concat(c), []);
 // → [1, 2, 3, 4, 5, 6]
 
 // Challenge 2. Your own loop
-// Your code here.
 
 loop(3, n => n > 0, n => n - 1, console.log);
+// Your code here.
+
+function loop(num, test, test2, op){
+  for(let i = 0; i <= num; i++){
+    if(test(i)){
+      op(i);
+      num = test2(num)
+
+    }
+  }
+}
+
 // → 3
 // → 2
 // → 1
 
 // Challenge 3. Everything
 function every(array, test) {
   // Your code here.
-}
+  let result = true
+  for(let item of array){
+     result = result && test(item)
+  }
+  return result;
+ }
+
 
 console.log(every([1, 3, 5], n => n < 10));
 // → true