Function meanBy

meanBy<T extends Record<string, any>>(items: T[], key: keyof T): number
Calculates the mean (average) of a specified numeric property in an array of objects.
Type Parameters
- T extends Record<string, any>
  The type of objects in the array.
Parameters
- items: T[]
  The array of objects.
- key: keyof T
  The key whose numeric values will be averaged.
Returns number
The mean value for the specified key, or 0 if no valid numbers are found.
Example
```
const data = [{ a: 2 }, { a: 4 }, { a: 6 }];
meanBy(data, 'a'); // Returns 4
```
- Defined in meanBy/meanBy.ts:13