meanBy
Import from @varavel/vdl-plugin-sdk/utils/math.
Calculates the average of an array of numbers when applying
the getValue function to each element.
If the array is empty, this function returns NaN.
Type Parameters
| Type Parameter | Description |
|---|---|
T |
The type of elements in the array. |
Parameters
| Parameter | Type | Description |
|---|---|---|
items |
readonly T[] |
An array to calculate the average. |
getValue |
(element) => number |
A function that selects a numeric value from each element. |
Returns
number
The average of all the numbers as determined by the getValue function.