Make get_array append instead of overwrite

rowbot

@@ -30,13 +30,12 @@ put_array() {
 get_array() {
   declare -n array=$1
   declare -n scalar=RB_A_${1^^}
-  local len val idx=0
+  local len val
 
   while [[ $scalar ]]; do
     len=${scalar%%:*} scalar=${scalar#"$len":}
     val=${scalar:0:len} scalar=${scalar:len}
-    array[$idx]=$val
-    (( idx += 1 ))
+    array+=( "$val" )
   done
 
   unset "RB_A_${1^^}"