Module-2-1-exercises

lecture-2-types.md

@@ -159,14 +159,14 @@ Of course comparison operators and logical operators are usually combined in an
 ```js
 // Look at these expressions below and determine whether they evaluate to true or false
 
-1. true || false
-2. false && false
-3. 1 < 2 && 2 > 1
-4. 31 < 13 || 1 < 2 && 3 > 1
-5. 400 <= 400 && 399 < 400 && (30 > 31 || 400 > 31)
-6. true && false && false || false && true
-7. true && false || true || false
-8. true && false && false || false && true ? true && false && false || false && true : 1 < 2 && 2 > 1
+1. true || false TRUE
+2. false && false FALSE
+3. 1 < 2 && 2 > 1 TRUE
+4. 31 < 13 || 1 < 2 && 3 > 1 TRUE
+5. 400 <= 400 && 399 < 400 && (30 > 31 || 400 > 31) TRUE
+6. true && false && false || false && true  FALSE
+7. true && false || true || false TRUE
+8. true && false && false || false && true ? true && false && false || false && true : 1 < 2 && 2 > 1 TRUE
 ```
 
 ---
@@ -293,9 +293,9 @@ Given this data structure:
 let data = [0, [], [], [1,2,3, [4]]]
 ```
 
-1. How would you access the value `0`?
-2. How would you access the value `3`?
-3. How would you access the value `4`?
+1. How would you access the value `0`? data[0]
+2. How would you access the value `3`? data[3][2]
+3. How would you access the value `4`? data[3][3][0]
 
 ---
 
@@ -341,6 +341,8 @@ Group the following items together according to their type:
 - List the number of properties for each object.
 - For each property, indicate its name and its value.
 - For each property value, indicate the type.
+--
+- NOTE: **3 things: Property, key and value (Property is KEY AND VALUE COMBINED)**
 
 ```js
 { label: 'corn', price: 5.3 + '$' };
@@ -374,9 +376,9 @@ let person = {name: 'Bob', age: 23};
 let name = 'John';
 
 // What is the value of the following expressions?
-1. person.name
-2. person['name']
-3. person[name]
+1. person.name BOB
+2. person['name'] BOB
+3. person[name] UNDEFINED
 
 ```
 
@@ -391,9 +393,9 @@ let person = {name: 'bob', age: 23};
 let key = 'name';
 
 // What is the value of the following expressions:
-1. person.key
-2. person['key']
-3. person[key]
+1. person.key UNDEFINED
+2. person['key'] UNDEFINED
+3. person[key] BOB
 
 ```
 

lecture-5-control-flow.md

@@ -61,12 +61,24 @@ Turn the following sentences into valid JavaScript `if` statements. _Use console
 // 1. If it rains, I stay home.
 let currentWeather = 'rainy';
 
+if (currentWeather === "rainy) {
+    console.log("stay home");
+}
+
 // 2. If I am hungry, I eat.
 let hunger = true;
 
+if (hunger){
+    console.log("eat!");
+}
+
 // 3. If it's 10pm, I go to bed. If not, I write code.
 let currentHour = 22;
 
+if (currentHour >= 22) {
+    console.log("go to bed")
+} else console.log ("write code");
+
 ```
 
 ## Loops
@@ -181,6 +193,14 @@ Write a program that output all of the numbers from 0 to 25
 ```js
 // code here
 
+for(i=0; i<=25; i++) {
+    console.log(i);
+}
+
+
+
+
+
 ```
 
 ---
@@ -192,6 +212,18 @@ Write a program that output all of ODD the numbers from 0 to 25
 ```js
 // code here
 
+for(i=0; i<26; i++) {
+    if (i % 2 === 1) {
+        console.log(i);
+    }
+}
+OR 
+
+for(let i=0; i<26; 2++) {
+    console.log(i)
+    }
+
+
 ```
 
 ---
@@ -203,6 +235,14 @@ Write a program that output all of the numbers from 0 to 25, but replaces all mu
 ```js
 // code here
 
+for(let i=0; i<26; i++){
+    if (i % 5 === 0 && i !== 0) {
+        console.log("five alive!");
+    } else {
+        console.log(i);
+    }
+}
+
 ```
 
 ---

workshop/2-types/2-questions.md

@@ -4,77 +4,108 @@
 
 1. ( ) "I am a "Horse""
 2. ( ) "I 'prefer' ducks'
-3. ( ) 'Yes, duck is nice'
-4. ( ) "Ah, but I\'m vegan!"
+3. (X) 'Yes, duck is nice'
+4. (X) "Ah, but I\'m vegan!"
 5. ( ) 'You'll eat salad then'
-6. ( ) 'Yes I\'ll eat salad'
+6. (X) 'Yes I\'ll eat salad'
 7. ( ) "I'm happy to hear that!"
 8. ( ) "\"Happy to hear " + 'that" ' + "he says!"
-9. ( ) “Hello world!”
+9. (X) “Hello world!”
 
 
 ## Question 2: Rewrite below all of the strings that are not valid, and correct them to make them valid. 
 
+1. "I am a Horse"
+2. "I prefer ducks"
+5. 'You\'ll eat salad then'
+7. "I\'m happy to hear that!"
+8. "Happy to hear " + "that " +  "he says!"
 
 
 ## Question 3: Which of the following expressions are true? Add an 'x' between the ( ) to indicate that it's true.
 
 1. ( ) 7 == 2
-2. ( ) 7 == 7
-3. ( ) 7 == '7'
-4. ( ) 7 != 0
-5. ( ) 7 !== '7'
+2. (X) 7 == 7
+3. (X) 7 == '7'
+4. (X) 7 != 0
+5. (X) 7 !== '7'
 6. ( ) 7 != '7'
 7. ( ) 7 != 7
 
 
 ## Question 4: Which of the following expressions is/are truthy?
 
-1. ( ) !0
+1. (X) !0
 2. ( ) !1
 3. ( ) -1
 4. ( ) !"hello!"
 5. ( ) null
-6. ( ) !undefined
-7. ( ) !NaN
+6. (X) !undefined
+7. (X) !NaN
 
 
 ## Question 5: Which of the following are valid objects?
 
-1. ( ) {}
+1. (X) {}
 2. ( ) { 'hello' }
-3. ( ) { name: 'I am fruit' }
-4. ( ) {'brand-name': 'Dior' }
+3. (X) { name: 'I am fruit' }
+4. (X) {'brand-name': 'Dior' }
 5. ( ) { brand-name: 'Channel' }
-6. ( ) { cool_name: 'bob' + ' Dylan', age: 25 }
+6. (X) { cool_name: 'bob' + ' Dylan', age: 25 }
 
 
 ## Question 6: For each array, specify the number of elements and the type of each element.
 
 1. ['cat', 'dog', 'bird']
-    - number of elements: 
+    - number of elements: 3
     - type of _each_ element:
-        - 'cat': 
-        - 'dog': 
-        - 'bird': 
+        - 'cat': string 
+        - 'dog': string 
+        - 'bird': string 
+
 2. [[], 24, 'hello', true]
+ - number: 4
+ - type
+    []: array
+    24: number 
+    "hello": string
+    "bird": string;
 
 3. []
+    - empty array
 
 4. [['romeo', 'juliet'], false]
 
+- number of elements: 2
+    - type of _each_ element:
+        - '['romeo', 'juliet']': array with two strings 
+        - false: boolean
+
+
+
 5. [{name: 'bob', age: 23}, {name: 'paul', age: 33}]
+
+ - number: 2 objects 
+
 
 
 ## Question 7: What is the type and value for each of the following variables?
 
 1. let  name = 'bob';
-    - type: 
-    - value: 
+    - type: string
+    - value: 'bob'
+
 2. let age = 45;
+     - type: number
+     - value: 45
 
 3. let isMarried = false;
+     - type: boolean
+     - value: false
 
 4. let person = { name: name, age: age, isMarried: isMarried }
+    - type: object
+
 
 5. let kids = [{name: 'Morty', age: 3}, {name: 'Summer', age: 7}]
+    - type: array of objects

workshop/5-control-flow/5-exercise-1.js

@@ -9,7 +9,7 @@
 
 // It is supposed to print to the console the numbers 1, 2, 3, 4, 5.
 
-for (let number = 2; number < 5; number ++) {
-    
+for (let number = 1; number < 6; number++) {
+
     console.log(number);
 }

workshop/5-control-flow/5-exercise-2.js

@@ -8,7 +8,7 @@
 // Fix this program
 // It should output the squares of all numbers between 0 and 12
 
-for (let number = 0; number < 12; number ++) {
-
+for (let number = 0; number < 13; number++) {
+    let square = number * number;
     console.log('the square of ', number, ' is ', square);
 }

workshop/5-control-flow/5-exercise-3.js

@@ -9,10 +9,9 @@
 // It should output all of the odd numbers between 1 and 25 (including 1 and 25)
 
 
-for (let number = 0; number < 25; number ++) {
-    
-    if (number % 2) {
+for (let number = 1; number < 26; number++) {
+
+    if (number % 2 === 1) {
         console.log(number);
     }
-    console.log(number);
 }

workshop/5-control-flow/5-exercise-4.1.js

@@ -6,3 +6,7 @@
 
 // Q4.1
 // Write a loop that will print to the console all of the integers from 0 to 100.
+
+for (i = 0; i < 101; i++) {
+    console.log(i);
+}

workshop/5-control-flow/5-exercise-4.2.js

@@ -6,3 +6,7 @@
 
 // Q4.2
 // Write a loop that will print to the console all of the integers from 5 to 100.
+
+for (i = 5; i < 101; i++) {
+    console.log(i);
+}

workshop/5-control-flow/5-exercise-4.3.js

@@ -6,3 +6,10 @@
 
 // Q4.3
 // Write a loop that will print to the console all of the EVEN integers from 1 to 100.
+
+for (let number = 1; number < 101; number++) {
+
+    if (number % 2 === 0) {
+        console.log(number);
+    }
+}

workshop/5-control-flow/5-exercise-4.4.js

@@ -6,3 +6,10 @@
 
 // Q4.4
 // Write a loop that will print to the console all of the EVEN integers from 100 to 0.
+
+for (let number = 100; number >= 0; number--) {
+
+    if (number % 2 === 0) {
+        console.log(number);
+    }
+}

workshop/5-control-flow/5-exercise-4.5.js

@@ -14,6 +14,14 @@
 // 2 is even
 // ...
 
+for (i = 0; i < 16; i++) {
+    if (i % 2 === 0) {
+        console.log(`${i} is even`)
+    } else console.log(`${i} is odd`)
+}
+
+
+
 
 
 // many other possibilities here.

workshop/5-control-flow/5-exercise-5.js

@@ -16,3 +16,11 @@
 // It's 11h. Time to train!
 // It's 12h. Time to train!
 // It's 13h. Time to eat!
+
+for (i = 0; i < 24; i++) {
+    if (i > 21 || i <= 5) {
+        console.log(`It's ${i}h. Time to sleep!`)
+    } else if (i === 7 || i === 13 || i === 18) {
+        console.log(`It's ${i}h. Time to eat!`)
+    } else console.log(`It's ${i}h. Time to train!`)
+}

workshop/5-control-flow/5-exercise-6.js

@@ -8,4 +8,13 @@
 // Write a program that will output the sum of all of the multiples of four
 // between 0 and 5000
 //
-// ANSWER: the number you should see in the console is 3127500
+// ANSWER: the number you should see in the console is 3127500
+
+
+let sum = 0;
+
+for (i = 0; i < 5001; i = 4 + i) {
+    sum = sum + i;
+}
+
+console.log(sum);