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Calculating excluded average - JavaScript
Suppose we have an array of objects like this −
const arr = [
{val: 56, canUse: true},
{val: 16, canUse: true},
{val: 45, canUse: true},
{val: 76, canUse: false},
{val: 45, canUse: true},
{val: 23, canUse: false},
{val: 23, canUse: false},
{val: 87, canUse: true},
];We are required to write a JavaScript function that calculates the average of the val property of all those objects that have a boolean true set for the canUse flag.
Example
Following is the code −
const arr = [
{val: 56, canUse: true},
{val: 16, canUse: true},
{val: 45, canUse: true},
{val: 76, canUse: false},
{val: 45, canUse: true},
{val: 23, canUse: false},
{val: 23, canUse: false},
{val: 87, canUse: true},
];
const excludedAverage = arr => {
let count = 0, props = 0;
for(let i = 0; i < arr.length; i++){
if(!arr[i].canUse){
continue;
};
props++;
count += arr[i].val;
};
return (count) / (!props ? 1 : props);
};
console.log(excludedAverage(arr));Output
This will produce the following output in console −
49.8
Updated on: 30-Sep-2020
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