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Get average of every group of n elements in an array JavaScript
We are required to write a JavaScript function that takes in an array of Numbers as the first argument and a Number, say n, as the second argument. The function should return an array of averages of groups of n elements.
For example: If the inputs are −
const arr = [1, 2, 3, 4, 5, 6]; const n = 2;
Then the output should be −
const output = [1.5, 3.5, 5.5];
Example
const arr = [1, 2, 3, 4, 5, 6];
const n = 2;
const groupAverage = (arr = [], n = 1) => {
const res = [];
for (let i = 0; i < arr.length;) {
let sum = 0;
for(let j = 0; j< n; j++){
sum += +arr[i++] || 0;
};
res.push(sum / n);
}
return res
}
console.log(groupAverage(arr, n))
console.log(groupAverage(arr, 3))Output
And the output in the console will be −
[ 1.5, 3.5, 5.5 ] [ 2, 5 ]
Updated on 23-Nov-2020 07:14:39
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