I have an array of objects with categories and corresponding points, and I need to calculate the total points for each category.
{
category: A,
points:2
},
{
category: A
points: 3
},
{
category: B,
points:2
},
{
category: B
points: 3
}
]
What is the most efficient way to sum up the points for category A and category B separately?
Here is a piece of code that might be useful for you
arr = [{
category: 'A',
points:2
},
{
category: 'A',
points: 3
},
{
category: 'B',
points:2
},
{
category: 'B',
points: 5
}]
let total = 0;
arr.filter(function(item){
return total += item['points']
});
console.log(total)
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