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* Retranslate the complete English edition from Simplified Chinese * Polish three English explanations after reader-focused review
59 lines
1.1 KiB
Python
59 lines
1.1 KiB
Python
"""
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File: simple_hash.py
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Created Time: 2023-06-15
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Author: krahets (krahets@163.com)
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"""
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def add_hash(key: str) -> int:
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"""Additive hash"""
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hash = 0
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modulus = 1000000007
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for c in key:
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hash += ord(c)
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return hash % modulus
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def mul_hash(key: str) -> int:
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"""Multiplicative hash"""
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hash = 0
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modulus = 1000000007
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for c in key:
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hash = 31 * hash + ord(c)
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return hash % modulus
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def xor_hash(key: str) -> int:
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"""XOR hash"""
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hash = 0
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modulus = 1000000007
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for c in key:
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hash ^= ord(c)
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return hash % modulus
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def rot_hash(key: str) -> int:
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"""Rotating hash"""
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hash = 0
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modulus = 1000000007
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for c in key:
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hash = (hash << 4) ^ (hash >> 28) ^ ord(c)
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return hash % modulus
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"""Driver code"""
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if __name__ == "__main__":
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key = "Hello 算法"
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hash = add_hash(key)
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print(f"Additive hash value: {hash}")
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hash = mul_hash(key)
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print(f"Multiplicative hash value: {hash}")
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hash = xor_hash(key)
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print(f"XOR hash value: {hash}")
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hash = rot_hash(key)
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print(f"Rotating hash value: {hash}")
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