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Joining of strings in a programming language
concatenation of "snow" and "ball" is "snowball". In certain formalizations of concatenation theory, also called string theory, string concatenation is
Concatenation
Topics referred to by the same term
up concatenation in Wiktionary, the free dictionary. Concatenation is a computer programming operation that joins strings together. Concatenation may
Concatenation (disambiguation)
Concatenation_(disambiguation)
Virtual concatenation has been defined for SONET/SDH, OTN and PDH path signals. Alternate SONET/SDH concatenation techniques are contiguous concatenation and
Virtual_concatenation
Math theory of strings of symbols
Concatenation theory, also called string theory, character-string theory, or theoretical syntax, studies character strings over finite alphabets of characters
Concatenation_theory
Delimited series of characters that represent a string in code
literals and using string concatenation: 'I said, "This is ' + "John's" + ' apple."' Python has string literal concatenation, so consecutive string literals
String_literal
Mathematical operation in linear algebra
In mathematics, specifically in linear algebra, matrix multiplication is a binary operation that produces a matrix from two matrices. For matrix multiplication
Matrix_multiplication
Packet concatenation is a computer networking optimization that coalesces multiple packets under a single header. The use of packet containment reduces
Packet_concatenation
Sequence of words formed by specific rules
0, the empty word, which is often denoted by e, ε, λ or even Λ. By concatenation one can combine two words to form a new word, whose length is the sum
Formal_language
Range concatenation grammar (RCG) is a grammar formalism developed by Pierre Boullier in 1998 as an attempt to characterize a number of phenomena of natural
Range_concatenation_grammar
Text processor used with C and C++ and other programming tools
replaced with their replacement list (without performing expansion). Concatenation operations are replaced with the concatenated result of the two operands
C_preprocessor
Sequence of characters, data type
makes certain string operations, such as insertions, deletions, and concatenations more efficient. The core data structure in a text editor is the one
String_(computer_science)
Metalanguage based on Backus–Naur Form (BNF)
range Repetition Grouping, optional Concatenation Alternative Use of the alternative operator with concatenation may be confusing, and it is recommended
Augmented_Backus–Naur_form
Continuous function whose domain is a closed unit interval
In mathematics, a path in a topological space X {\displaystyle X} is a continuous function from a closed interval into X . {\displaystyle X.} Paths play
Path_(topology)
Lemma that defines a property of regular languages
— — Unrestricted (no common name) Context-sensitive Positive range concatenation Indexed — Linear context-free rewriting systems Tree-adjoining Context-free
Pumping lemma for regular languages
Pumping_lemma_for_regular_languages
Type of a context-free grammar
— — Unrestricted (no common name) Context-sensitive Positive range concatenation Indexed — Linear context-free rewriting systems Tree-adjoining Context-free
LL_grammar
The concatenation (enchainement) is an architectural composition that unites chaining parts together—as with separate elements in long façades, with the
Concatenation_(architecture)
2001 compilation album by Meshuggah
present for lead guitarist Fredrik Thordendal. The remix for the song "Concatenation" is a slower version of the song with a different drum beat. The person
Rare_Trax
Algorithm to transform a regular expression into a finite automaton
{\displaystyle \Delta (q_{f},a)=\emptyset } . Let c be the number of concatenation of the regular expression E and let s be the number of symbols apart
Thompson's_construction
Programming language
immutable; built-in operators and keywords (rather than functions) provide concatenation, comparison, and UTF-8 encoding/decoding. Record types can be defined
Go_(programming_language)
Formal grammar
— — Unrestricted (no common name) Context-sensitive Positive range concatenation Indexed — Linear context-free rewriting systems Tree-adjoining Context-free
Regular_tree_grammar
Techniques for using multiple disk drives that do not use RAID
multiple hard disk drives from "JBoD" to create a spanned volume. Such a concatenation is sometimes also called BIG/SPAN. A SPAN or BIG is generally a spanned
Non-RAID_drive_architectures
Finite-state machine
closed under the following operations. Union Intersection (see picture) Concatenation Complement Kleene closure Reversal Quotient Substitution Homomorphism
Deterministic finite automaton
Deterministic_finite_automaton
British manufacturer of wire ropes
Belgium-based Bekaert company. The name Bridon originates from the concatenation or contraction of the words British and Doncaster; it is not a family
Bridon_Ropes
Style of object-oriented programming in which inheritance is based on reusing objects
Languages. p. 17. Antero Taivalsaar (2009). "Simplifying JavaScript with Concatenation-Based Prototype Inheritance" (PDF). Tampere University of Technology
Prototype-based_programming
Replacing placeholders in a string with values
context. String interpolation is an alternative to building a string via concatenation, which requires repeat quoting and unquoting; or substituting into a
String_interpolation
String rewriting system
alphabet forms a free monoid together with the binary operation of string concatenation (denoted as ⋅ {\displaystyle \cdot } and written multiplicatively by
Semi-Thue_system
Typographic symbol
'fu' or 'bar'. The double vertical bar operator "||" denotes string concatenation in PL/I, REXX, ooRexx, standard ANSI SQL, and theoretical computer science
Vertical_bar
vector. The clonal vectors are then sequenced and mapped to the genome. Concatenation of the tags, as developed in 2004, is different from that seen in SAGE
Trans-Spliced Exon Coupled RNA End Determination
Trans-Spliced_Exon_Coupled_RNA_End_Determination
Theorem in complex analysis
non-real points z1, z2, …, zn. Consider the closed contour C, which is the concatenation of the paths C1 and C2 shown in the picture. By definition, ∮ C f (
Jordan's_lemma
Identification number for a unit of real estate
typically a concatenation of the book, page, parcel number. In New York State, they are called "SBL numbers" because they are a concatenation of the section
Assessor's_parcel_number
Family of metasyntax notations
, S , "-" , S , term | term , S ; concatenation = ( S , factor , S , "," ? ) + ; alternation = ( S , concatenation , S , "|" ? ) + ; rhs = alternation
Extended_Backus–Naur_form
Computer program for working with tabular data
A spreadsheet's concatenation ("&") function can be used to assemble complex text strings in a single cell (in this example, XML code for an SVG "circle"
Spreadsheet
Punctuation and accent mark (~, ◌̃)
"12014" (concatenation of strings), or something else. D disallows + operator for arrays (and strings), and provides separate operator for concatenation (similarly
Tilde
Command on various operating systems
operating system since Windows Server 2003, and on ReactOS. It is a concatenation of the words "Who am I?" and prints the effective username of the current
Whoami
Number-name combination assigned to minor planets
and name, at least in tables and for first mentions in a text. Such concatenations are not in themselves official names. Comets are also managed by the
Minor-planet_designation
Scheme for controlling errors in data over noisy communication channels
{def} }{=}}\;\textstyle \bigcup _{n\in \mathbb {N} }\Delta ^{n}} (a concatenation of letters) from the alphabet Δ {\displaystyle \Delta } . Most commonly
Error_correction_code
Type of pumping lemma
— — Unrestricted (no common name) Context-sensitive Positive range concatenation Indexed — Linear context-free rewriting systems Tree-adjoining Context-free
Pumping lemma for context-free languages
Pumping_lemma_for_context-free_languages
Concatenation of the first n prime numbers
Smarandache–Wellin number is an integer that in a given base is the concatenation of the first n prime numbers written in that base. Smarandache–Wellin
Smarandache–Wellin_number
— — Unrestricted (no common name) Context-sensitive Positive range concatenation Indexed — Linear context-free rewriting systems Tree-adjoining Context-free
Kuroda_normal_form
Revision of the C++ programming language released in 2026
with std::string_view std::views::concat, a view for concatenation of other views Concatenation of strings and string views Printing blank lines with
C++26
Hash function that is suitable for use in cryptography
suitable m′ an attacker can calculate hash(m ∥ m′), where ∥ denotes concatenation. This property can be used to break naive authentication schemes based
Cryptographic_hash_function
Sequence of characters that forms a search pattern
following operations over them are defined to produce regular expressions: (concatenation) (RS) denotes the set of strings that can be obtained by concatenating
Regular_expression
Artificial production of human speech
determine which approach is used. Concatenative synthesis is based on the concatenation (stringing together) of segments of recorded speech. Generally, concatenative
Speech_synthesis
Set of codewords, none a prefix of another
string 10 could be interpreted either as a single codeword or as the concatenation of the words 1 then 0. The variable-length Huffman codes, telephone
Prefix_code
is also able to temporarily remove failed members from the virtual concatenation group. A failed member will automatically cause a decrease of the bandwidth
Link Capacity Adjustment Scheme
Link_Capacity_Adjustment_Scheme
times to transmit each of the N symbols in a codeword of Cout. The concatenation of Cout (as outer code) with Cin (as inner code), denoted Cout ∘ {\displaystyle
Concatenated error correction code
Concatenated_error_correction_code
is a sequence of words in which each word can be constructed as the concatenation of previous words in the sequence. Formally, an infinite sequence of
Locally_catenative_sequence
Word consisting of two words
software ⇒ Microsoft Some linguists do not regard beginning+beginning concatenations as blends, instead calling them complex clippings, clipping compounds
Portmanteau
programming languages. Different languages use different symbols for the concatenation operator. Many languages use the "+" symbol, though several deviate
Comparison of programming languages (strings)
Comparison_of_programming_languages_(strings)
Handling of strings in the C programming language
strings) in its standard library. Various operations, such as copying, concatenation, tokenization and searching are supported. For character strings, the
C_string_handling
Character(s) for specifying the boundary between regions of data
separator 28 ␜ INFORMATION SEPARATOR FOUR End of file or between a concatenation of files group separator 29 ␝ INFORMATION SEPARATOR THREE Between sections
Delimiter
Concept in generalized context free grammar
fundamental operations are then added to all rewrite rules: wrapping and concatenation. Wrapping is an operation on two headed strings defined as follows:
Head_grammar
Index to lists of airline designators
air waybills and in telecommunications. A flight designator is the concatenation of the airline designator, xx(a), and the numeric flight number, n(n)(n)(n)
Airline_codes
Set of JSON communications profiles
in). This is necessary as JSON is a non-concatenative protocol (the concatenation of two JSON objects does not produce a valid JSON object). IETF RFC 7464
JSON_streaming
Shell command for writing an input file or stream to standard output
command can be used to serve various needs including concatenation and display. A use case for concatenation is to specify multiple input files and to redirect
Cat_(Unix)
Traditional English hunting cry
Taïaut may have originated in the second half of the 13th century by the concatenation of a two-word war-cry: taille haut, where "taille" is the cutting edge
Tally-ho
System of rules to convert information into another form or representation
source (clear text) character by a codeword from some dictionary, and concatenation of such codewords give us an encoded string. Variable-length codes are
Code
Computer science and linguistics concept relating to non-terminal production
— — Unrestricted (no common name) Context-sensitive Positive range concatenation Indexed — Linear context-free rewriting systems Tree-adjoining Context-free
Recursive_grammar
Preposition used in Dutch surnames
Van (Dutch pronunciation: [fɑn] ) is a very common prefix in Dutch language surnames, where it is known as a tussenvoegsel. In those cases it nearly always
Van_(Dutch)
Text-string-oriented programming language
in the programming language, and by providing operators for pattern concatenation and alternation. SNOBOL4 patterns are a type of object and admit various
SNOBOL
197), (193, 199) (OEIS: A023201, OEIS: A046117) Primes that are the concatenation of the first n primes written in decimal. 2, 23, 2357 (OEIS: A069151)
List_of_prime_numbers
Password cracking dataset
hash that is generated using the following function (where "+" is the concatenation operator): saltedhash(password) = hash(password + salt) Or saltedhash(password)
Rainbow_table
Purely functional data structure
"fingers" (leaves) of the tree, which is where data is stored, and concatenation and splitting logarithmic time in the size of the smaller piece. It
Finger_tree
Hardware description language
(*Verilog-2001) <<< Arithmetic left shift (*Verilog-2001) Concatenation {, } Concatenation Replication {n{m}} Replicate value m for n times Conditional
Verilog
Group that is also a differentiable manifold with group operations that are smooth
For any rotation of the circle, there exists the same symmetry, and concatenation of such rotations makes them into the circle group, an archetypal example
Lie_group
Halting probability of a random computer program
string w such that for all x, F(w x) = f(x); here w x represents the concatenation of the two strings w and x. This means that F can be used to simulate
Chaitin's_constant
American YouTuber (born 1993)
named "Creator of the Decade". The username of his YouTube channel is a concatenation of MKB (Brownlee's initials) and HD (for high definition). As of 2025
Marques_Brownlee
Boolean algebra
{B}}}}.} We only need one binary operation, and concatenation suffices to denote it. Hence concatenation and overbar suffice to notate 2. This notation
Two-element_Boolean_algebra
Programming language where character positioning in text is insignificant
are mostly free-form, though in some cases whitespace characters are concatenation operators. SQL, though not a full programming language, is also free-form
Free-form_language
Jewish nationalist movement
51 Toward the end of the 1930s and especially after World War II, a concatenation of events – Britain's waning commitment to the Balfour Declaration,
Zionism
Software utility: "Simple Logging Facade for Java"
string that is never actually logged. In the following example, string concatenation and toString() method for the values count or userAccountList are performed
SLF4J
Concept in mathematics
sequences (or strings) of zero or more elements from that set, with string concatenation as the monoid operation and with the unique sequence of zero elements
Free_monoid
Multimedia framework
is widely used for format transcoding, basic editing (trimming and concatenation), video scaling, video post-production effects, and standards compliance
FFmpeg
Type of error correcting code
error-correcting codes. The code construction is based on a multiple recursive concatenation of a short kernel code which transforms the physical channel into virtual
Polar_code_(coding_theory)
Classification of formal languages
set symbol, all boolean operators – including complementation – and concatenation but no Kleene star. The condition is equivalent to having generalized
Star-free_language
Topics referred to by the same term
direct dialing +, positive electric charge +, symbol for check in chess Concatenation, represented by a + in some programming languages Operator (computer
+_(disambiguation)
Infinite binary sequence generated by repeated complementation and concatenation
Infinite binary sequence generated by repeated complementation and concatenation
Thue–Morse_sequence
Book by Georges Polti
Dramatic Technique. The 36 situations have been critiqued as being "concatenations of events rather than minimal or isolable motifs". Each situation is
The Thirty-Six Dramatic Situations
The_Thirty-Six_Dramatic_Situations
Data structure for storing strings
N ) {\displaystyle O(\log N)} time to compute the root weight) A concatenation can be performed simply by creating a new root node with left = S1 and
Rope_(data_structure)
Algebraic structure
a semigroup is that formed by string concatenation, which glues together strings. For example, the concatenation of the strings "spot " and "run" is the
Semigroup
Type of data structure
of hashing the concatenation of hash 0-0 and hash 0-1. That is, hash 0 = hash( hash 0-0 + hash 0-1 ) where "+" denotes concatenation. Most hash tree
Merkle_tree
Written or spoken word game
if it's in EXPSPACE. In German, words can be formed quite freely by concatenation. Because of this, one can write a regular expression that generates
Ghost_(game)
1998 studio album by Meshuggah
No. Title Music Length 1. "Concatenation" Thordendal 4:14 2. "New Millennium Cyanide Christ" Thordendal, Hagström 5:35 3. "Corridor of Chameleons" Thordendal
Chaosphere
Natural number
Foundation. Retrieved 2016-06-13. Sloane, N. J. A. (ed.). "Sequence A069151 (Concatenations of consecutive primes, starting with 2, that are also prime)". The On-Line
2000_(number)
Data structure representing a finite set of strings
— — Unrestricted (no common name) Context-sensitive Positive range concatenation Indexed — Linear context-free rewriting systems Tree-adjoining Context-free
Deterministic acyclic finite state automaton
Deterministic_acyclic_finite_state_automaton
and B are the set union A ∪ B, the set intersection A ∩ B, and the concatenation A⋅B. Finally, as an operation taking a single operand, the set A* denotes
Language_equation
Unique string of length zero
ε ⋅ s = s ⋅ ε = s. The empty string is the identity element of the concatenation operation. The set of all strings forms a free monoid with respect to
Empty_string
closed under intersection and Kleene star, but not complement, union or concatenation. Every regular language not containing the empty string is the image
Local language (formal language)
Local_language_(formal_language)
Standardized AI performance test
Ismail Mirumbe (2022). "Members of Narayana's cow sequence that are concatenations of two repdigits". arXiv:2210.00926 [math.NT]. Kazemi, Mehran; Fatemi
Language_model_benchmark
106·999 = 105994 (long scale) may be named. The choice of roots and the concatenation procedure is that of the standard dictionary numbers if n is 9 or smaller
Names_of_large_numbers
Universal lossless data compression algorithm
Instead of adding just the concatenation of the previous match with the current match to the dictionary, add the concatenations of the previous match with
Lempel–Ziv–Welch
is then passed through a mapping block which typically uses virtual concatenation (VCAT) to route the stream of bits over one or more SDH paths. As this
Ethernet_over_SDH
Software organization of the Michigan Terminal System
are case independent. I/O modifiers, line number ranges, and explicit concatenation can be used to create complex FDnames from simple FDnames. For example:
MTS_system_architecture
Class of problems solvable in polynomial time
Languages in P are also closed under reversal, intersection, union, concatenation, Kleene closure, inverse homomorphism, and complementation. Some problems
P_(complexity)
Identifier of a base station on a cell phone network
and UTRAN Cell ID (also called LCID). The UTRAN Cell ID (LCID) is a concatenation of the RNC-ID (12 bits, ID of the Radio Network Controller) and Cell
GSM_Cell_ID
Instructions for the x86 microprocessors
Byte Manipulation Instructions 2 (VBMI2) – byte/word load, store and concatenation with shift. AVX-512 Bit Algorithms (BITALG) – byte/word bit manipulation
Advanced_Vector_Extensions
Code used in quantum error correction
{L}}\rangle } and | 1 L ⟩ {\textstyle |1_{\rm {L}}\rangle } we use concatenation, that is, each of the three qubits is multiplied into a three qubit
Shor_code
Digital signal processing technique
"Diphone synthesis using an overlap-add technique for speech waveforms concatenation". ICASSP '86. IEEE International Conference on Acoustics, Speech, and
PSOLA
Indo-European language of the Italic branch
'powerful', by dropping the final s of omnis and concatenating. Often, the concatenation changed the part of speech, and nouns were produced from verb segments
Latin
Natural number
In base 10, 164 is the smallest number that can be expressed as a concatenation of two squares in two different ways: as 1 concatenate 64 or 16 concatenate
164_(number)
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