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krahets
2024-04-13 21:17:44 +08:00
parent 9332a91e26
commit 6afa70e7bc
55 changed files with 334 additions and 182 deletions
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4
docs/chapter_hashing/hash_algorithm.md
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@@ -560,6 +560,7 @@ index = hash(key) % capacity
/* 加法哈希 */
fun addHash(key: String): Int {
var hash = 0L
val MODULUS = 1000000007
for (c in key.toCharArray()) {
hash = (hash + c.code) % MODULUS
}
@@ -569,6 +570,7 @@ index = hash(key) % capacity
/* 乘法哈希 */
fun mulHash(key: String): Int {
var hash = 0L
val MODULUS = 1000000007
for (c in key.toCharArray()) {
hash = (31 * hash + c.code) % MODULUS
}
@@ -578,6 +580,7 @@ index = hash(key) % capacity
/* 异或哈希 */
fun xorHash(key: String): Int {
var hash = 0
val MODULUS = 1000000007
for (c in key.toCharArray()) {
hash = hash xor c.code
}
@@ -587,6 +590,7 @@ index = hash(key) % capacity
/* 旋转哈希 */
fun rotHash(key: String): Int {
var hash = 0L
val MODULUS = 1000000007
for (c in key.toCharArray()) {
hash = ((hash shl 4) xor (hash shr 28) xor c.code.toLong()) % MODULUS
}