JavaScript - Number of 0 bits in a binary representation

Last update on November 09 2022 14:58:50 (UTC/GMT +8 hours)

JavaScript Bit Manipulation: Exercise-3 with Solution

Write a JavaScript program to count number of 0 bits in binary representation of a given integer.

Test Data:
(45) -> 2
(17) -> 3
(15) -> "Parameter value is not an Integer!"

Sample Solution:

JavaScript Code:

function Binary_Count_SetBits(a) 
{
  // check whether input is an integer
  if (!Number.isInteger(a))
    {
      return('Parameter value is not an Integer!')
    }
    return a.toString(2).split('0').length - 1
}
console.log(Binary_Count_SetBits(45))
console.log(Binary_Count_SetBits(17))
console.log(Binary_Count_SetBits("15"))

Sample Output:

2
3
Parameter value is not an Integer!

Flowchart:

Live Demo:

See the Pen javascript-bit-manipulation-exercise-2 by w3resource (@w3resource) on CodePen.

* To run the code mouse over on Result panel and click on 'RERUN' button.*

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JavaScript: Tips of the Day

Returns the symmetric difference between two arrays, after applying the provided function to each array element of both

Example:

const tips_symmetricDifference = (x, y, fn) => {
  const sA = new Set(x.map(v => fn(v))),
    sB = new Set(y.map(v => fn(v)));
  return [...x.filter(x => !sB.has(fn(x))), ...y.filter(x => !sA.has(fn(x)))];
};

console.log(tips_symmetricDifference([3.5, 5.5], [5.5, 7.5], Math.floor));

Output:

[3.5, 7.5]