What (who) is hash coding - definition
PORTION OF A GENE'S DNA OR RNA, COMPOSED OF EXONS, THAT CODES FOR PROTEIN; COMPOSED OF CODONS, WHICH ARE DECODED, TRANSLATED INTO PROTEINS BY THE RIBOSOME; BEGINS WITH THE START CODON AND END WITH A STOP CODON
Coding sequence; Coding regions; Coding DNA sequence; Protein coding region; Protein coding sequence; Gene coding; Coding DNA; Protein-coding
hash coding
<programming, algorithm> (Or "hashing") A scheme for providing
rapid access to data items which are distinguished by some
key. Each data item to be stored is associated with a key,
e.g. the name of a person. A hash function is applied to
the item's key and the resulting hash value is used as an
index to select one of a number of "hash buckets" in a hash
table. The table contains pointers to the original items.
If, when adding a new item, the hash table already has an
entry at the indicated location then that entry's key must be
compared with the given key to see if it is the same. If two
items' keys hash to the same value (a "hash collision") then
some alternative location is used (e.g. the next free location
cyclically following the indicated one). For best
performance, the table size and hash function must be
tailored to the number of entries and range of keys to be
used. The hash function usually depends on the table size so
if the table needs to be enlarged it must usually be
completely rebuilt.
When you look up a name in the phone book (for example), you
typically hash it by extracting its first letter; the hash
buckets are the alphabetically ordered letter sections.
See also: btree, checksum, CRC, pseudorandom number,
random, random number, soundex.
(1997-08-03)
Hash Code (programming competition)
TEAM PROGRAMMING COMPETITION ORGANIZED BY GOOGLE
Draft:Hash Code (programming competition); Google Hash Code
Hash Code is a global team programming competition organized by Google. The participants work in teams of 2-4 people solving a programming challenge inspired by software engineering at Google.
hash table
![This graph compares the average number of CPU cache misses required to look up elements in large hash tables (far exceeding size of the cache) with chaining and linear probing. Linear probing performs better due to better [[locality of reference]], though as the table gets full, its performance degrades drastically.](https://commons.wikimedia.org/wiki/Special:FilePath/Hash table average insertion time.png?width=200 "This graph compares the average number of CPU cache misses required to look up elements in large hash tables (far exceeding size of the cache) with chaining and linear probing. Linear probing performs better due to better [[locality of reference]], though as the table gets full, its performance degrades drastically.")
ASSOCIATES DATA VALUES WITH KEY VALUES - A LOOKUP TABLE
Hashtable; Hash-table; Hash tables; Hash map; Rehash; Hashmap; Open hashing; Scatter storage; Address-calculation sort; Hash Table; Chaining hash table; Separate chaining; Direct chaining; Collision resolution scheme; External chaining; Load factor (computer science); Hash-Based Indexes; Hash table collisions; Hash table collision; Array hash table; Dynamic-sized hash table; Collision resolution in hash tables
Wikipedia
Coding region
The coding region of a gene, also known as the coding sequence (CDS), is the portion of a gene's DNA or RNA that codes for protein. Studying the length, composition, regulation, splicing, structures, and functions of coding regions compared to non-coding regions over different species and time periods can provide a significant amount of important information regarding gene organization and evolution of prokaryotes and eukaryotes. This can further assist in mapping the human genome and developing gene therapy.
