hash coden.

Brit.

/ˈhaʃ kəʊd/, U.S.

/ˈhæʃ ˌkoʊd/

Origin: Formed within English, by compounding. Etymons: hash n.¹, code n.

Etymology: < hash n.¹ + code n., so called because it consists of small pieces of code arranged in an apparently jumbled and fragmented way (compare hash n.¹ 4). Compare slightly earlier hash code v. and later hash n.¹ 9.

Computing.

A numeric or alphanumeric string obtained by applying a hash function to a piece of data; a hash value (hash value n. at hash n.¹ Compounds 1b).

ΚΠ

1964 W. A. Martin Hash-coding Functions of Complex Variable (MIT Artific. Intelligence Project Memo No. 70) 1 Equivalence under the algebraic and trigonometric relations can be determined with high probability by hash-coding the expressions using finite field arithmetic and then comparing the resulting hash-code numbers.

1989 PC Mag. 25 Apr. 298/2 You must inspect the linkage field to see if there are other records that have the same hash code.

2014 M. W. Graves Digital Archaeol. vii. 111 The hash codes of the original can be compared to the copy to assure authenticity.

This entry has been updated (OED Third Edition, December 2018; most recently modified version published online March 2022).

hash codev.

Brit.

/ˈhaʃ kəʊd/, U.S.

/ˈhæʃ ˌkoʊd/

Origin: Formed within English, by compounding. Etymons: hash n.¹, code v.

Etymology: < hash n.¹ (compare hash n.¹ 4) + code v., with reference to encoding data in an apparently jumbled and fragmented way (compare hash n.¹ 4). Compare slightly later hash code n. and hash v. 4.

Computing.

transitive. To assign a numeric or alphanumeric string to (a piece of data) by applying a function whose output values are all the same number of bits in length; spec. to encode (a piece of data) by this technique; = hash v. 4.

ΚΠ

1963 [implied in: D. G. Bobrow METEOR (MIT Artific. Intelligence Project Memo No. 51) 16 Retrieval from the dictionary is very fast because LISP uses a hash-coded ‘bucket sort’ to find the property lists of atoms. (at hash coded adj. at Derivatives)].

1964 W. A. Martin Hash-coding Functions of Complex Variable (MIT Artific. Intelligence Project, Memo No. 70) 1 Equivalence under the algebraic and trigonometric relations can be determined with high probability by hash-coding the expressions using finite field arithmetic and then comparing the resulting hash-code numbers.

1993 Jrnl. Information Sci. 20 17/1 Sometimes the key words for each document or significant words in the title of each document are hash coded into a fixed-length bit string..which can be used for best match searching.

2017 S. Zhang & G. H. Yang in Proc. ACM SIGIR Internat. Conf. Theory Information Retrieval 52/2 The AOL [= America Online] log was ‘anonymized’ by hash coding the ID of each user.

Derivatives

ˈhash coded adj. [compare slightly earlier hashed adj. 2]

ΚΠ

1963 D. G. Bobrow METEOR (MIT Artific. Intelligence Project Memo No. 51) 16 Retrieval from the dictionary is very fast because LISP uses a hash-coded ‘bucket sort’ to find the property lists of atoms.

1981 InfoWorld 5 Oct. 26/4 It uses hash-coded index files, which makes operation of the system very fast.

2015 IEEE Trans. Image Processing 24 5236/1 The color similarity can be calculated efficiently with hash coded color names.

ˈhash coding n. [compare slightly earlier hashing n.²]

ΚΠ

1965 J. A. Feldman Aspects Associative Processing (MIT Lincoln Lab. Techn. Note 1965-13) ii. 13 The associative addressing simulator for the TX-2 is a descendent of the well-known scrambling or hash-coding schemes.

1989 Computer July 55/2 Hash coding works best when the hashing function spreads the calculated addresses over memory.

2017 J. Zhang et al. in 10th Internat. Conf. Image & Signal Processing (abstract) For many computer vision applications, hash coding is getting more attention with the increasing growth of data.

This entry has been updated (OED Third Edition, December 2018; most recently modified version published online March 2022).

单词	hash code
释义	hash coden. Brit. /ˈhaʃ kəʊd/, U.S. /ˈhæʃ ˌkoʊd/ Origin: Formed within English, by compounding. Etymons: hash n.¹, code n. Etymology: < hash n.¹ + code n., so called because it consists of small pieces of code arranged in an apparently jumbled and fragmented way (compare hash n.¹ 4). Compare slightly earlier hash code v. and later hash n.¹ 9. Computing. A numeric or alphanumeric string obtained by applying a hash function to a piece of data; a hash value (hash value n. at hash n.¹ Compounds 1b). ΚΠ 1964 W. A. Martin Hash-coding Functions of Complex Variable (MIT Artific. Intelligence Project Memo No. 70) 1 Equivalence under the algebraic and trigonometric relations can be determined with high probability by hash-coding the expressions using finite field arithmetic and then comparing the resulting hash-code numbers. 1989 PC Mag. 25 Apr. 298/2 You must inspect the linkage field to see if there are other records that have the same hash code. 2014 M. W. Graves Digital Archaeol. vii. 111 The hash codes of the original can be compared to the copy to assure authenticity. This entry has been updated (OED Third Edition, December 2018; most recently modified version published online March 2022). hash codev. Brit. /ˈhaʃ kəʊd/, U.S. /ˈhæʃ ˌkoʊd/ Origin: Formed within English, by compounding. Etymons: hash n.¹, code v. Etymology: < hash n.¹ (compare hash n.¹ 4) + code v., with reference to encoding data in an apparently jumbled and fragmented way (compare hash n.¹ 4). Compare slightly later hash code n. and hash v. 4. Computing. transitive. To assign a numeric or alphanumeric string to (a piece of data) by applying a function whose output values are all the same number of bits in length; spec. to encode (a piece of data) by this technique; = hash v. 4. ΚΠ 1963 [implied in: D. G. Bobrow METEOR (MIT Artific. Intelligence Project Memo No. 51) 16 Retrieval from the dictionary is very fast because LISP uses a hash-coded ‘bucket sort’ to find the property lists of atoms. (at hash coded adj. at Derivatives)]. 1964 W. A. Martin Hash-coding Functions of Complex Variable (MIT Artific. Intelligence Project, Memo No. 70) 1 Equivalence under the algebraic and trigonometric relations can be determined with high probability by hash-coding the expressions using finite field arithmetic and then comparing the resulting hash-code numbers. 1993 Jrnl. Information Sci. 20 17/1 Sometimes the key words for each document or significant words in the title of each document are hash coded into a fixed-length bit string..which can be used for best match searching. 2017 S. Zhang & G. H. Yang in Proc. ACM SIGIR Internat. Conf. Theory Information Retrieval 52/2 The AOL [= America Online] log was ‘anonymized’ by hash coding the ID of each user. Derivatives ˈhash coded adj. [compare slightly earlier hashed adj. 2] ΚΠ 1963 D. G. Bobrow METEOR (MIT Artific. Intelligence Project Memo No. 51) 16 Retrieval from the dictionary is very fast because LISP uses a hash-coded ‘bucket sort’ to find the property lists of atoms. 1981 InfoWorld 5 Oct. 26/4 It uses hash-coded index files, which makes operation of the system very fast. 2015 IEEE Trans. Image Processing 24 5236/1 The color similarity can be calculated efficiently with hash coded color names. ˈhash coding n. [compare slightly earlier hashing n.²] ΚΠ 1965 J. A. Feldman Aspects Associative Processing (MIT Lincoln Lab. Techn. Note 1965-13) ii. 13 The associative addressing simulator for the TX-2 is a descendent of the well-known scrambling or hash-coding schemes. 1989 Computer July 55/2 Hash coding works best when the hashing function spreads the calculated addresses over memory. 2017 J. Zhang et al. in 10th Internat. Conf. Image & Signal Processing (abstract) For many computer vision applications, hash coding is getting more attention with the increasing growth of data. This entry has been updated (OED Third Edition, December 2018; most recently modified version published online March 2022). < n.1964v.1963
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