Running `5.7.1:441300`, trying to loop through the results of an `HGETALL`
operation in Redis:
```
127.0.0.1:6379[1]> keys *
1) "customer_params:14045551212:1.1.1.1"
127.0.0.1:6379[1]> hgetall customer_params:14045551212:1.1.1.1
1) "auth_ha1"
2) "9febe8cf72c6bd063b8978cded892e4bb"
```
This means that the returned type will be `$redisd(rpl_arr)` and a loop is
required. For any given key value `$redis(r=>value[x])`, the value is in the
next array slot, at `$redis(r=>value[x + 1])`.
With that in mind, I tried this loop:
```
$var(i) = 0;
while($var(i) < $redis(r=>size)) {
$var(key) = $redis(r=>value[$var(i)]);
switch($var(key)) {
case "auth_ha1":
$var(auth_ha1) = $redis(r=>value[$var(i)+1]);
break;
}
$var(i) = $var(i) + 1;
}
```
However, this ends up storing the key value ("auth_ha1") in `$var(auth_ha1)`. I
also tried `$(var(i){s.int}) + 1` for the subscript value.
To get the actual next-slot value, the expression evaluation has to be
externalised into an intermediate variable:
```
while($var(i) < $redis(r=>size)) {
$var(key) = $redis(r=>value[$var(i)]);
# For some reason, Kamailio cannot evaluate an addition expression
inside this subscript: $redis(r=>value[EXPR])
$var(idx) = $var(i) + 1;
switch($var(key)) {
case "auth_ha1":
$var(auth_ha1) = $redis(r=>value[$var(idx)]);
break;
}
$var(i) = $var(i) + 1;
}
```
This works, and yields `9febe8cf72c6bd063b8978cded892e4bb`.
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