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en/codes/javascript/chapter_hashing/simple_hash.js
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Yudong Jin
Translate all code to English (#1836)
31 дек 2025, 02:44
Не верифицирован
31 дек 2025, 02:44
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/** * File: simple_hash.js * Created Time: 2023-08-06 * Author: yuan0221 (yl1452491917@gmail.com) */ /* Additive hash */ function addHash(key) { let hash = 0; const MODULUS = 1000000007; for (const c of key) { hash = (hash + c.charCodeAt(0)) % MODULUS; } return hash; } /* Multiplicative hash */ function mulHash(key) { let hash = 0; const MODULUS = 1000000007; for (const c of key) { hash = (31 * hash + c.charCodeAt(0)) % MODULUS; } return hash; } /* XOR hash */ function xorHash(key) { let hash = 0; const MODULUS = 1000000007; for (const c of key) { hash ^= c.charCodeAt(0); } return hash % MODULUS; } /* Rotational hash */ function rotHash(key) { let hash = 0; const MODULUS = 1000000007; for (const c of key) { hash = ((hash << 4) ^ (hash >> 28) ^ c.charCodeAt(0)) % MODULUS; } return hash; } /* Driver Code */ const key = 'Hello Algo'; let hash = addHash(key); console.log('Additive hash value is ' + hash); hash = mulHash(key); console.log('Multiplicative hash value is ' + hash); hash = xorHash(key); console.log('XOR hash value is ' + hash); hash = rotHash(key); console.log('Rotational hash value is ' + hash);