$oh->splice( 1, 0, @pairs ); #add after first entry
Splice is tricky when there is a replacment list and the list includes keys
already in the hash. Removing them throws off the offset/length. Possibly
splicing keys already in the hash just has to be an error.
Splice is tricky when there is a replacment list and the list includes keys
already in the hash. Removing them throws off the offset/length. Possibly
splicing keys already in the hash just has to be an error.