id	summary	reporter	owner	description	type	status	priority	milestone	version	resolution	keywords	cc
65	Provide a invidual-item update action in mutable vector API	hvr		"One of the operations I've caught myself defining is an `update` action for modifying an invididual item in a vector, i.e.: 
{{{
#!hs
import qualified Data.Vector.Unboxed.Mutable as VUM

update vec idx op = VUM.write vec idx . op =<< VUM.read vec idx
}}}

Could such a convenience operation (unless it's already there) be added to the mutable vector APIs?"	enhancement	new	minor	0.10				alexey.skladnoy@…