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JavaScript: Replace all the numbers with a specified number of a given array of integers

JavaScript Basic: Exercise-95 with Solution

Write a JavaScript program to replace all the numbers with a specified number of a given array of integers.

Pictorial Presentation:

JavaScript: Replace all the numbers with a specified number 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>Replace all the numbers with a specified number of a given array of integers</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function array_element_replace(arr, old_value, new_value) {
  for (var i = 0; i < arr.length; i++) {
    if (arr[i] === old_value) {
      arr[i] = new_value;
    }
  }
  return arr;
}
num = [1, 2, 3, 2, 2, 8, 1, 9];
console.log("Original Array: "+num);
console.log(array_element_replace(num, 2, 5));

Sample Output:

Original Array: 1,2,3,2,2,8,1,9
[1,5,3,5,5,8,1,9]

Flowchart:

Flowchart: JavaScript - Replace all the numbers with a specified number of a given array of integers

ES6 Version:

function array_element_replace(arr, old_value, new_value) {
  for (let i = 0; i < arr.length; i++) {
    if (arr[i] === old_value) {
      arr[i] = new_value;
    }
  }
  return arr;
}
num = [1, 2, 3, 2, 2, 8, 1, 9];
console.log(`Original Array: ${num}`);
console.log(array_element_replace(num, 2, 5));

Live Demo:

See the Pen javascript-basic-exercise-95 by w3resource (@w3resource) on CodePen.


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Previous: Write a JavaScript program to find the number which appears most in a given array of integers.
Next: Write a JavaScript program to compute the sum of absolute differences of consecutive numbers of a given array of integers.

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JavaScript: Tips of the Day

Returns the sum of the powers of all the numbers from start to end (both inclusive)

Example:

const sumPower = (end, power = 2, start = 1) =>
  Array(end + 1 - start)
    .fill(0)
    .map((x, i) => (i + start) ** power)
    .reduce((a, b) => a + b, 0);
console.log(sumPower(10)); // 385
console.log(sumPower(10, 3)); // 3025
console.log(sumPower(10, 3, 5)); // 2925 

Output:

385
3025
2925