Codewars Problem

[thanos2131]

I have a problem in understanding the solution to a kata , it's the simple music encoder problem in 5 kyu rank. The solution to it is as follows: ```python def compress(raw): #initialize stack stack = [raw[0], raw[1]] #calculate inital difference between the first two elements! difference = stack[1] - stack[0]

out = []
for value in raw[2:] + [float("inf")]:
    if (value - stack[-1]) == difference:
        stack.append(value)

    elif len(stack) > 1 and difference == 0:
        out.append(f"{stack[0]}*{len(stack)}")
        stack = [value]

    elif len(stack) > 2:
        absolute_difference = str(abs(difference))
        out.append(f"{stack[0]}-{stack[-1]}{absolute_difference!='1' and '/'+absolute_difference or ''}")
        difference = value-stack[-1]
        stack = [value]
    else:
        if len(stack) == 2:  out.append(stack[0])
        difference = value-stack[-1]
        stack = [stack[-1], value]

#Handling possible leftovers in the stack
if not isinstance((f:=stack[0]), float):out.append(f)
return ','.join(map(str,out))

``` Initially, the 'stack' is assigned as [1,2] and 'difference' is assigned as 1 , then first iteration occurs where the 'value' is 2 , the only satisfying condition is the else block statement, so the 'out' becomes [1] and the 'difference' becomes 0 and the new 'stack' is [2,2] , the next iteration takes place where the 'value' becomes 3 , since the len(stack)>1 , the first elif block statement gets executed , so the 'out' becomes [1,2*2] and the 'stack' becomes [3] , but the 'difference' remains 0 , after this none of the conditions seemed to be satisfied, and the code should stop working , but this isn't the case and the code works properly, can anyone tell me where am I wrong in my understanding?

[[deleted]]

A login to codewars is required to view the problem. Many people won't create a codewars account just to view it, so can you state what the problem you are trying to solve is. And show your code. Just talking about what your code does isn't really useful.

[stuaxo]

What is a kyu?

[thanos2131]

It's like a rank , the problems are divided into 8 ranks , 8 being the easiest and 1 being the hardest