Computer notes - Hashing

Class No.35 Data Structures http://ecomputernotes.com

Skip List: Implementation   S 0 S 1 S 2 S 3   45 12 23 34   34   23 34 http://ecomputernotes.com

Implementation: TowerNode ,[object Object],[object Object],[object Object],http://ecomputernotes.com 40 50 60 head tail 20 30 26 57 Tower Node

Implementation: QuadNode ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],x quad-node http://ecomputernotes.com

Skip Lists with Quad Nodes 56 64 78  31 34 44  12 23 26    31  64  31 34  23 S 0 S 1 S 2 S 3 http://ecomputernotes.com

Performance of Skip Lists ,[object Object],[object Object],[object Object],[object Object],http://ecomputernotes.com

Implementation 5: AVL tree ,[object Object],[object Object],[object Object],[object Object],and so on http://ecomputernotes.com key entry key entry key entry key entry

Anything better? ,[object Object],[object Object],http://ecomputernotes.com

[object Object],[object Object],[object Object],Implementation 6: Hashing key entry Key hash function array index 4 10 123 http://ecomputernotes.com

[object Object],[object Object],[object Object],Hashing key entry 4 10 123 All are constant time (1) ! http://ecomputernotes.com

Hashing ,[object Object],[object Object],http://ecomputernotes.com

Example: fruits ,[object Object],[object Object],http://ecomputernotes.com kiwi banana watermelon apple mango cantaloupe grapes strawberry 0 1 2 3 4 5 6 7 8 9

Example ,[object Object],[object Object],http://ecomputernotes.com kiwi banana watermelon apple mango cantaloupe grapes strawberry 0 1 2 3 4 5 6 7 8 9

Example Hash Functions ,[object Object],[object Object],TableSize ABC h Example TableSize i str str h length i )% 67 66 65 ( ) ( : % ] [ ) ( 1 0                http://ecomputernotes.com

Finding the hash function ,[object Object],[object Object],http://ecomputernotes.com

Example Hash Functions ,[object Object],T b b b ABC h Example T b i str str h length i i )% 67 66 65 ( ) ( : % ] [ ) ( 2 1 0 1 0                 http://ecomputernotes.com

Example Hash Functions ,[object Object],[object Object],[object Object],http://ecomputernotes.com

Computer notes - Hashing

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