Learn Advanced Array Methods by Building a Statistics Calculator - Step 22

[uyansuat93]

Tell us what’s happening:

this is, what i have to do:
Declare a median variable. Using the ternary operator, check if the length of array is even. If the length of array is even, find the two middle numbers and calculate the mean of those numbers. If the length of array is odd, find the middle number and assign it to the median variable.

and this is hint i get:
If the array.length is even, your median variable should use the getMean function to calculate the mean of the two middle numbers. Your first argument should be the value of sorted at array.length / 2 , and the second at array.length / 2 - 1 .

i dont know where my mistake is

Your code so far

javascript
/* file: script.js */
const getMean = (array) => array.reduce((acc, el) => acc + el, 0) / array.length;


// User Editable Region

const getMedian = (array) => {
  const sorted = array.sort((a, b) => a - b);
  const median = array.length % 2 === 0 ? getMean(sorted[array.length / 2], sorted[array.length / 2 - 1]) : sorted[array.length / 2] ;
}

// User Editable Region


const calculate = () => {
  const value = document.querySelector("#numbers").value;
  const array = value.split(/,\s*/g);
  const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
  
  const mean = getMean(numbers);

  document.querySelector("#mean").textContent = mean;
}

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Challenge Information:

Learn Advanced Array Methods by Building a Statistics Calculator - Step 22

freeCodeCamp.org

[uyansuat93]

i solved it, you have to be aware that the getMean function takes an Array as an argument, so use

[glovek08]

As uyansuat93 mentioned, since getMean takes an array, you call getMean with a two-element array containing the values of you two middle elements, e.g.

getMean([sorted[array.length / 2], sorted[array.length / 2 - 1]])