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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.


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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.

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JavaScript: Tips of the Day

How to insert an item into an array at a specific index (JavaScript)?

What you want is the splice function on the native array object.

arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:

var arr = [];
arr[0] = "Jani";
arr[1] = "Hege";
arr[2] = "Stale";
arr[3] = "Kai Jim";
arr[4] = "Borge";

console.log(arr.join());
arr.splice(2, 0, "Lene");
console.log(arr.join());

Ref: https://bit.ly/2BXbp04