Hash map from scratch #73

rowankim400 22.05.2026 12:02

Hash map from scratch #73

Clean and minimal

core.py

def memoize(fn):
    cache = {}
    def wrapper(*args):
        if args not in cache:
            cache[args] = fn(*args)
        return cache[args]
    return wrapper

@memoize
def expensive(n):
    return sum(range(n))

print(expensive(1000000))

data.py

from collections import Counter
def top_words(text, n=5):
    words = text.lower().split()
    return Counter(words).most_common(n)

print(top_words('the cat sat on the mat the cat'))

Hash map from scratch #73

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