how to hmdel in iterate hashmap?

[peiyuefeng]

in iterate hashmap, failed to delete specific items which match conditions. i cant find safe way to do it :

here is my code, the stbds_hmdel will change the array, so the iteration will happen unexpected things.

int map_len = stbds_hmlenu(ControlMap);
for (int i = 0; i < map_len; i++) {
key = ControlMap[i].key;
value = ControlMap[i].value;
if (value.drop_flag == 1 && value.drop_stop_time < now) {
stbds_hmdel(ControlMap, key);
}
}

how to safely delete some items in iterate hashmap?

[nothings]

you're deleting from a different hashmap than you're iterating?

anyway, don't cache stbds_hmlenu in a variable. obviously the length has to change when you delete from it.

[nothings]

Anyway, do you know how to delete from an array you're iterating from? Because it's exactly the same, and the code you're using doesn't even work for that.

[nothings]

Anyway, this is basically a solved problem if you use an interface like C++ (even though C++ doesn't actually implement this, but they could): https://www.nothings.org/computer/iterate.html

But in C, with only macros, where you're just using an indexed for loop, there's nothing I can do to make it work automatically, you have to treat it like an array iterator.

[peiyuefeng]

you're deleting from a different hashmap than you're iterating?

anyway, don't cache stbds_hmlenu in a variable. obviously the length has to change when you delete from it.

sorry, the code is error, so i just changed it .

just delete from same hashmap.

[peiyuefeng]

Anyway, do you know how to delete from an array you're iterating from? Because it's exactly the same, and the code you're using doesn't even work for that.

if i delete from an array, i will do this

for (int i =arrlenu(array)-1; i>=0; i--){ if(array[i].value == 1){ arrdel(array, i); } }

i will iterate array from max to 0 , then del the specifi item which match the condition.

[nothings]

Have you tried that with the hashmap?

[peiyuefeng]

Have you tried that with the hashmap?

you are right, just iterate from max to 0, it will resolve my problem.

why i ask so stupid question which i had resolve it already? it's my fault, thank you, and sorry for waste your time.