JavaScript Kata #35: How good are you really?

By YayoDrayber | Learn To Code With Me | 16 Sep 2022

If you missed the introductory post, it's here. For a list of previously solved katas, please refer to the bottom of this page.

If this is your first time seeing my post, please note - these katas are probably randomly assigned per user so please don't go into Codewars thinking we will have exactly the same user experience, I am just posting these in the order that I got them.

Kata #35

DESCRIPTION:

There was a test in your class and you passed it. Congratulations!
But you're an ambitious person. You want to know if you're better than the average student in your class.

You receive an array with your peers' test scores. Now calculate the average and compare your score!

Return True if you're better, else False!

Note:

Your points are not included in the array of your class's points. For calculating the average point you may add your point to the given array!

Starting code:

function betterThanAverage(classPoints, yourPoints) {
  // Your code here
}

My attempt:

function betterThanAverage(classPoints, yourPoints) {
  let classAverage = (classPoints.reduce((sum,current)=>sum+current,0))/classPoints.length
  return yourPoints > classAverage
}

Rank #1:

function betterThanAverage(classPoints, yourPoints) {
  return yourPoints > classPoints.reduce((a, b) => a + b, 0) / classPoints.length; 
}

Rank #2:

function betterThanAverage(classPoints, yourPoints) {
  // Your code here
  var classAvg = 0;
  for (var i = 0; i < classPoints.length; i++){
    classAvg += classPoints[i]; 
  }
  classAvg = classAvg/classPoints.length; 
  return yourPoints > classAvg;
}

Rank #3:

function betterThanAverage(classPoints, yourPoints) {
  const classPointsSum = classPoints.reduce((a, b) => a + b, 0);
  const classAverage = classPointsSum / classPoints.length;
  const isBetter = yourPoints > classAverage;
  return isBetter;
}

Rank #4:

function betterThanAverage(classPoints, yourPoints) {
  return yourPoints > classPoints.reduce(function(sum, x){return sum + x},yourPoints)/(classPoints.length+1)
}

That's it for Kata #35, stay tuned for more katas to be solved!

Link to Kata #1: Square(n) Sum

Link to Kata #2: Convert a Number to a String

Link to Kata #3: DNA to RNA Conversion

Link to Kata #4: Remove First and Last Character

Link to Kata #5: MakeUpperCase

Link to Kata #6: Total amount of points

Link to Kata #7: A Needle in the Haystack

Link to Kata #8: Sum of positive

Link to Kata #9: Basic Mathematical Operations

Link to Kata #10: Beginner - Reduce but Grow

Link to Kata #11: Square Every Digit