(u8data-set! data idx val)

u8data-set! sets u8data value.

Parameter	Description
data	u8vector operated on
idx	Index of the value to be replaced
val	New value to be set

Example

Example 1: Replace the 4th value of a u8data with 99

> (define mydata (u8vector->u8data (u8vector 1 4 9 16 25 36)))
> (u8data->u8vector mydata)
#u8(1 4 9 16 25 36)
> (u8data-set! mydata 4 99)
> (u8data->u8vector mydata)
#u8(1 4 9 16 99 36)