I was wondering the best way to do this in javascript (ES6).
So I have a 2 dimensional array like so:
const two_dimensional_array = [
[33000, 100],
[33500, 200],
]
I now have another 2 dimensional array like so:
const another_array = [
[33500, 1300]
]
and I want it to find the the first value from another_array in two_dimensional_array and then add the 2nd value to it. So the end result of two_dimensional_array would be like:
const two_dimensional_array = [
[33000, 100],
[33500, 1500],
]
Map from another_array where the key is the first number of the pair and the value is the second number.Array#forEach, iterate over two_dimensional_array and try to check if there's a number to add (0 otherwise).const
two_dimensional_array = [ [33000, 100], [33500, 200] ],
another_array = [ [33500, 1300] ];
const map = new Map(another_array);
two_dimensional_array.forEach(arr => arr[1] += map.get(arr[0]) ?? 0);
console.log(two_dimensional_array);