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median ​

Problem ​

You need the median (middle value) of a dataset, which is more robust to outliers than the mean.

Solution ​

Use median(array, callback?) to return the median value.

ts
import { median } from '@vielzeug/arsenal';

median([3, 1, 4, 1, 5]); // 3

const data = [{ value: 10 }, { value: 20 }, { value: 30 }];
median(data, (d) => d.value); // 20

Pitfalls ​

  • For even-length arrays, returns the average of the two middle values.
  • Returns undefined for empty arrays.