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JavaScript: Compute the sum of absolute differences of consecutive numbers of a given array of integers

JavaScript Basic: Exercise-96 with Solution

Write a JavaScript program to compute the sum of absolute differences of consecutive numbers of a given array of integers.

Pictorial Presentation:

JavaScript: Compute the sum of absolute differences of consecutive numbers of a given array of integers.

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title> Compute the sum of absolute differences of consecutive numbers of a given array of integers</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function sum_adjacent_difference(arr) {
	var result = 0;
	for (var i = 1; i < arr.length; i++) {
		result += Math.abs(arr[i] - arr[i - 1]);
	}
	return result;
}

console.log(sum_adjacent_difference([1, 2, 3, 2, -5]));

Sample Output:

10

Flowchart:

Flowchart: JavaScript - Compute the sum of absolute differences of consecutive numbers of a given array of integers

ES6 Version:

function sum_adjacent_difference(arr) {
	let result = 0;
	for (let i = 1; i < arr.length; i++) {
		result += Math.abs(arr[i] - arr[i - 1]);
	}
	return result;
}

console.log(sum_adjacent_difference([1, 2, 3, 2, -5]));

Live Demo:

See the Pen javascript-basic-exercise-96 by w3resource (@w3resource) on CodePen.


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Next: Write a JavaScript program to find the shortest possible string which can create a string to make it a palindrome by adding characters to the end of it.

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JavaScript: Tips of the Day

Checks if a string is an anagram of another string (case-insensitive, ignores spaces, punctuation and special characters)

Example:

const isAnagram = (str1, str2) => {
  const normalize = str =>
    str
      .toLowerCase()
      .replace(/[^a-z0-9]/gi, '')
      .split('')
      .sort()
      .join('');
  return normalize(str1) === normalize(str2);
};
console.log(isAnagram('iceman', 'cinema')); // true

Output:

true