import { avg } from '@opentf/std';
 
avg(
  arr: number[] = [],
  cb?: (val: number, index: number) => number
): number

avg() //=> 0
 
avg([]) //=> 0
 
avg([1]) //=> 1
 
avg([4, 1, 7]) //=> 4
 
avg([4, 2, 8]) //=> 4.666666666666667
 
avg([1, 4, 2, 5, 0]) //=> 2.4
 
avg([10, 20, 40, 50]) //=> 30
 
avg([1, 2, 3, 4, 5]) //=> 3
 
avg([-1, -2]) //=> -1.5
 
avg([1, 2, 3, 4, 5], (n) => n ** 2) //=> 11