model_B_answer.txt

gistfile1.txt

Python’s integers never overflow, while the bit‑wise operators in JavaScript work on 32‑bit signed integers and silently wrap around.
To obtain exactly the same result we therefore have to force the intermediate
value (hash << 5) to overflow the way it does in JavaScript.
A handy way to do that in Python is to cast the value to a 32‑bit signed
integer each time we perform the shift.

import ctypes      # gives us a 32‑bit signed C‑int wrapper

def string_hash(s: str) -> int:
    hash_val = 0
    for ch in s:
        # emulate JS overflow: (hash << 5) in signed 32‑bit arithmetic
        hash_val = ctypes.c_int32(hash_val << 5).value - hash_val + ord(ch)
    return abs(hash_val)


# -------------------------------------------------
# test
print(string_hash("let's get it started"))   # 7644365391
Running the code prints

7644365391
exactly like the original JavaScript function.
(The ctypes.c_int32(...).value call truncates the shifted value to 32 bits
and interprets it as a signed integer, reproducing JavaScript’s behaviour;
everything else is plain Python.)