I understand the concept of reduce, but I am struggling with a multidimensional array. Can someone help me with transforming this:
y = [['x', 0.5], ['x', 0.5], ['z', 2], ['z', 2]];
into this:
y = [['x', 1], ['z', 4]];
Appreciate any assistance!
One way to simplify the process is to use an object to accumulate the sums of keys, and then convert it back into an array of arrays using Object.entries()
const y = [
["x", 0.5],
["x", 0.5],
["z", 2],
["z", 2],
]
const res = Object.entries(
y.reduce((acc, [key, value]) => {
acc[key] = (acc[key] || 0) + value
return acc
}, {})
)
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