bash array parser

parse_array() {
  FS=':'
  key=(); val=()
  for (( i=0 ; i < $(eval echo \${#$1[@]}) ; i++ )); do
  key+=( "$(eval echo \${$1[$i]} | awk -F${FS} '{print $1}')" )
  val+=( "$(eval echo \${$1[$i]} | awk -F${FS} '{print $2}')" ) 
  done
}
# Assuming script contains myarray=( "key1:value1" "key2:value2" )
parse_array myarray
myarray_key=( "${key[@]}" )
myarray_val=( "${val[@]}" )