w3resource

JavaScript: Rotate the elements left of a given array of integers of length 3

JavaScript Basic: Exercise-70 with Solution

Write a JavaScript program to rotate the elements left of a given array of integers of length 3.

Pictorial Presentation:

JavaScript: Rotate the elements left of a given array of integers of length 3.

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JavaScript program to rotate the elements left of a given array of integers of length 3.</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function rotate_elements_left(array)
{
    return [array[1], array[2], array[0]];
}
console.log(rotate_elements_left([3, 4, 5]));  
console.log(rotate_elements_left([0, -1, 2]));  
console.log(rotate_elements_left([7, 6, 5])); 

Sample Output:

[4,5,3]
[-1,2,0]
[6,5,7]

Flowchart:

Flowchart: JavaScript - Rotate the elements left of a given array of integers of length 3

ES6 Version:

function rotate_elements_left(array)
{
    return [array[1], array[2], array[0]];
}
console.log(rotate_elements_left([3, 4, 5]));  
console.log(rotate_elements_left([0, -1, 2]));  
console.log(rotate_elements_left([7, 6, 5]));

Live Demo:

See the Pen JavaScript - Rotate the elements left of a given array of integers of length 3 - basic-ex-70 by w3resource (@w3resource) on CodePen.


Contribute your code and comments through Disqus.

Previous: Write a JavaScript program to compute the sum of three elements of a given array of integers of length 3.
Next: Write a JavaScript program to check if 1 appears in first or last position of a given array of integers.

What is the difficulty level of this exercise?



JavaScript: Tips of the Day

Parameter's value

function getItems(fruitList, ...args, favoriteFruit) {
  return [...fruitList, ...args, favoriteFruit]
}

getItems(["banana", "apple"], "pear", "orange")

...args is a rest parameter. The rest parameter's value is an array containing all remaining arguments, and can only be the last parameter! In this example, the rest parameter was the second parameter. This is not possible, and will throw a syntax error.

function getItems(fruitList, favoriteFruit, ...args) {
  return [...fruitList, ...args, favoriteFruit];
}


getItems(['banana', 'apple'], 'pear', 'orange');
The above example works. This returns the array [ 'banana', 'apple', 'orange', 'pear' ].

Ref: https://bit.ly/3jFRBje