JS : .map Method

redd

1. const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
   
2. 
   
3. // Create the secretMessage array below
   
4. const secretMessage = animals.map(animal => {
   
5.   return animal[0];
   
6. });
   
7. 
   
8. console.log(secretMessage.join(''));
   
9. 
   
10. const bigNumbers = [100, 200, 300, 400, 500];
    
11. 
    
12. // Create the smallNumbers array below
    
13. const smallNumbers = bigNumbers.map(bigNumber => {
    
14.   return bigNumber/100;
    
15. });
    
16. 
    
17. console.log(smallNumbers);

複製代碼

結果：
HelloWorld
[ 1, 2, 3, 4, 5 ]