JavaScript Basics Lecture

Complementary Material

• 1. Hello World
• 2. Data Types
• 3. Comments
• 4. Variables
• 5. If/Else Statements
• 6. For Loops
• 7. Functions
• 8. Arrays
• 9. Objects

Slides

Exercice 1: Create a BMI system with Prompt and Alert.

Rules:

Category	from	to
Underweight		18.5
Normal Range	18.5	23
Overweight—At Risk	23	25
Overweight—Moderately Obese	25	30
Overweight—Severely Obese	30

Exercice 2: Create a calculator

Exercice 3: Create a Pokemon Battle System

Homework:

• Create a Palindrome

Homework:

1. Create a calculator factory that operates with arrays.
2. The method sum should works with numbers and strings.

   // Numbers
   [1, 2, 3, 4, 5] // 15
   [10, 20, 30, 40, 50] // 150
   
   // Strings
   ["one, ", "two, ", "three"] // "one, two, three"
   ["hey, ", "what's ", "up", "?"] // "hey, what's up?"

3. The method sumAndSquare should sum a collection and then square the sum.

   [1, 2, 3, 4, 5] // 225
   [10, 11, 12, 13, 14] // 3600

4. The method onlyEvens should filter out odd numbers.

   [1, 2, 3, 4, 5, 6] // [2, 4, 6]
   [7, 8, 9, 10, 11, 12] // [8, 10, 12]

5. The method onlyOdds should filter out even numbers.

   [1, 2, 3, 4, 5, 6] // [1, 3, 5]
   [7, 8, 9, 10, 11, 12] // [7, 9, 11]

6. The method squareAndSum should square every number in a collection and then summing them.

   [1, 2, 3, 4, 5, 6] // 91