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Programming language operator
typeof, alternately also typeOf, and TypeOf, is an operator provided by several programming languages to determine the data type of a variable. This is
Typeof
Format for expressing RDF statements in HTML documents
most Web authors in a day. RDFa Lite consists of five attributes: vocab, typeof, property, resource, and prefix. RDFa 1.1 Lite is upwards compatible with
RDFa
General-purpose programming language
alignof bool constexpr false nullptr static_assert thread_local true typeof typeof_unqual _BitInt _Decimal32 _Decimal64 _Decimal128 Most of the recently
C_(programming_language)
C programming language standard, current revision
_Static_assert, _Thread_local. Add _BitInt keyword (see "types" group). Add typeof and typeof_unqual keywords (see "types" group). Add nullptr keyword (see "constants"
C23_(C_standard_revision)
Type that allows only one value
null (in fact, typeof(null) is void): typeof(null) returnThatSpecialThing() { return null; } void writeTypeOfNull() { writeln(typeof(null)); // prints:
Unit_type
number. For example: Node: Test1 typeOf: TestNode child: Test2, Test3 name: "I am a test node" itemCode: 42 Node: Test2 typeOf: TestNode sibling: Test3 name:
Meta_Content_Framework
—N/a Alignof alignof(R) or _Alignof(R) No Yes —N/a Typeof typeof(a) typeof(R) typeof_unqual(a) typeof_unqual(R) —N/a Yes —N/a Decltype decltype(a) decltype(R)
Operators_in_C_and_C++
Set of rules defining correctly structured programs
package private protected public return static super switch this throw try typeof using var void while with yield The following words refer to literal values
JavaScript_syntax
Ability of a process to examine and modify itself
PrintHello(); // With reflection Object reflectedFoo = Activator.CreateInstance(typeof(Foo)); MethodInfo method = reflectedFoo.GetType() .GetMethod("PrintHello");
Reflective_programming
Specifier keyword to query an expression's type
vendors implemented their own versions of the operator, typically called typeof, and some portable implementations with limited functionality, based on
Decltype
Client-side data storage in web browsers
"value"}); alert(typeof localStorage.getItem('key')); // string // Store an integer instead of a string localStorage.setItem("key", 1); alert(typeof localStorage
Web_storage
Serverless relational database management system
typed columns, although it can be emulated with constraints like CHECK(typeof(x)='integer'). In 2021, support for static typing was added through STRICT
SQLite
Extension of the Web to facilitate data exchange
vocab="https://schema.org/" typeof="Person"> <span property="name">Paul Schuster</span> was born in <span property="birthPlace" typeof="Place" href="https://www
Semantic_Web
Set of open-source compilers
MetadataReference[] { MetadataReference.CreateFromFile(typeof(object).Assembly.Location), MetadataReference.CreateFromFile(typeof(Console).Assembly.Location) }, options:
Roslyn_(compiler)
HTML used to reinforce meaning of documents or webpages
added inside class attributes as discussed above; and RDFa relies on rel, typeof and property attributes added to existing elements. Computer programming
Semantic_HTML
Style of computer programming
function, similar to std::max in c++: #define max(a,b) \ ({ typeof (a) _a = (a); \ typeof (b) _b = (b); \ _a > _b ? _a : _b; }) Concept (generic programming)
Generic_programming
Project for creating structured data
</div> <section> <h1 property="name">Avatar</h1> <div property="director" typeof="Person"> Director: <span property="name">James Cameron</span> (born <time
Schema.org
JavaScript script
worker support on a browser function browserSupportsWebWorkers() { return typeof window.Worker === "function"; } Web workers are currently supported by Chrome
Web_worker
Unicode character block
2025-10-07. "Symbols For Legacy Computing Supplement - Iosevka Specimen". typeof.net. Retrieved 2024-10-17. Cascadia Code 2404.23 – release notes for Cascadia
Symbols for Legacy Computing Supplement
Symbols_for_Legacy_Computing_Supplement
Basic programming language construct
.) If(...,...,...) GetXmlNamespace(...) GetType(...) NameOf(...) TypeOf...Is TypeOf...IsNot DirectCast(...,...) TryCast(...,...) LINQ: From Aggregate
Operator (computer programming)
Operator_(computer_programming)
<div about="#store" typeof="gr:Location"> <div property="gr:name" content="Pizzeria La Mamma"></div> <div rel="vcard:adr"> <div typeof="vcard:Address"> <div
GoodRelations
Data type that allows for values that are one of multiple different data types
implicitly "tagged" with a type by the language, and may be retrieved using a typeof call for primitive values and an instanceof comparison for complex data
Union_type
Programming language syntax designed for ease of use
allow auto x = expr as a shorthand for decltype(expr) x = expr in C++ or typeof(expr) x = expr in C. Python list comprehensions (such as [x*x for x in range(10)]
Syntactic_sugar
Programming language feature
[]); finally Subject.Free; end; end; Type inference Type introspection typeof Reflection (computer science) Template (C++) Sun Microsystems (2000). "Runtime
Run-time_type_information
Computer programming language
for foreach function if in local null resume return switch this throw try typeof while yield constructor instanceof true false static __LINE__ __FILE__ rawcall
Squirrel (programming language)
Squirrel_(programming_language)
by default, but may be annotated with a typeof declaration. Type variables use the syntax *0, *1, etc. typeof id = *0 -> *0; def id x = x; A function
Id_(programming_language)
Function that takes one or more functions as an input or that outputs a function
(generic function with 1 method) julia> g = twice(plusthree) (::var"#result#3"{typeof(plusthree)}) (generic function with 1 method) julia> g(7) 13 fun twice(f:
Higher-order_function
AssertThrowsTests { [Test] public void Tests() { // .NET 1.x Assert.Throws(typeof(ArgumentException), new TestDelegate(MethodThatThrows)); // .NET 2.0 Assert
NUnit
High-level programming language
internal_divide set clock mpram set family macro proc set part ram set reset rom seq sema try { ... } reset shared trysema signal with typeof undefined wom
Handel-C
Term for abstraction in computer programming
strings, normally a type mismatch error. In JavaScript, evaluation of the typeof operator succeeds when the operand is an undeclared identifier, which would
Magic_(programming)
Form of text that defines C code
signed sizeof static static_assert struct switch thread_local typedef typeof typeof_unqual union unsigned void volatile while The following keywords are
C_syntax
Standard macro in the C programming language
structure that contains it: #define CONTAINER_OF(ptr, Type, member) ({ \ const typeof(((Type*)0)->member) *__mptr = (ptr); \ (Type*)((char*)__mptr - offsetof(Type
Offsetof
Set of rules defining correctly structured programs for the C# programming language
short sizeof stackalloc static string struct switch this throw true try typeof uint ulong unchecked unsafe ushort using virtual void volatile while A contextual
C_Sharp_syntax
Comparison of programming languages
supports function overloading and template specialization. C23 introduces the typeof operator which produces a type of either a type or an expression. In C++
Compatibility_of_C_and_C++
19th-century Galician literary group
бібліотека Академії наук Української РСР, 1962. — 132 с. Марунчак<span typeof="mw:Entity" id="mwbA"> </span>М. Маркіян Шашкевич на тлі доби. — Вінніпеґ :
Ruthenian_Triad
JavaScript and WebAssembly engine
prototype-based inheritance (from Self) via function's prototype property. typeof, void and delete var operators. Array, Boolean, Function, Number, String
SpiderMonkey
Higher-order function Y for which Y f = f (Y f)
const trampoline = <T>(fn: T | (() => T)): T => { let ctx = fn; while (typeof ctx === "function") { ctx = (ctx as () => T)(); } return ctx; }; const countFn
Fixed-point_combinator
Windows data storage system project
relationship as: ContactsCollection contacts = picture.OutgoingRelationships.Cast(typeof(Contact)).Value; // This retrieves the collection of all outgoing relationships
WinFS
Comparison of two programming languages
equivalent End If var type = typeof(int); Dim type = GetType(Integer) if (a is b) { // types of a and b are compatible } If TypeOf a Is b Then ' types of a
Comparison of C Sharp and Visual Basic .NET
Comparison_of_C_Sharp_and_Visual_Basic_.NET
Programming technique
leaves contain an 'a' followed by a 'b'? function aThenB(treebin) { if (typeof(treebin) === "string") { if (treebin === "a") { lastWasA = true; return
Store-passing_style
Set of rules defining correctly structured programs for the Rust programming language
unused words. abstract become box do final gen macro override priv try typeof unsized virtual yield Variables in Rust are defined through the let keyword
Rust_syntax
Storage size operator in C and C++
int age; // int is 4 bytes long }; printf("%zu", sizeof(struct Student)); typeof offsetof "C99 standard (ISO/IEC9899)" (PDF). ISO/IEC. 7 September 2007.
Sizeof
rational numbers with the rational operator, //. For example, 6//9 == 2//3 && typeof(-4//9) == Rational{Int64}. Haskell provides a Rational type, which is really
Rational_data_type
Synchronization mechanism
writes. */ \ ACCESS_ONCE(p) = (v); \ }) #define rcu_dereference(p) ({ \ typeof(p) _value = ACCESS_ONCE(p); \ smp_read_barrier_depends(); /* nop on most
Read-copy-update
Programming language feature
trace(describeType(flash.display.Sprite)); Reification (computer science) typeof Java Language Specification: instanceof Java API: java.lang.Class Moose
Type_introspection
Musical artist
Other Materials [3particles, US] CD 2003 of surfaces [LINE, US] CD 2002 typeof Fällt, N.Ireland] 3" CD 2001 decisive forms Trente Oiseaux, Germany] CD
Richard_Chartier
Delay of a task until it is first needed
Object.keys(obj).length; } var _static = { getFruit: function(type) { if (typeof types[type] == 'undefined') { types[type] = new Fruit; } return types[type];
Lazy_initialization
Object Pascal-based programming language
T); begin var a := left; var b := right; Console.WriteLine('Type: {0}', typeof(T)); Console.WriteLine('-> a = {0}, b = {1}', a , b); Swap<T>(var a, var
Oxygene (programming language)
Oxygene_(programming_language)
French-Chilean politician (born 1974)
a deputy. In January 2020, during a broadcast of Balance ton post<span typeof="mw:DisplaySpace" id="mwAbw"> </span>!, in which she is a commentator, commented
Raquel_Garrido
Tool of editors for programming, scripting and markup
[DefaultValue(null)] [PersistenceMode(PersistenceMode.InnerProperty)] [TemplateContainer(typeof(MyType))] [TemplateInstance(TemplateInstance.Single)] #endregion public
Code_folding
x->can("method") exists x->{field} AUTOLOAD Raku x.can("method") x.field.defined AUTOLOAD OCaml —N/a JavaScript typeof x.method === "function" field in x COBOL —N/a
Comparison of programming languages (object-oriented programming)
Comparison_of_programming_languages_(object-oriented_programming)
The argument l_ret_type can be removed if __typeof__ is available; in the example below using __typeof__ on array would return testtype *, which can
Examples of anonymous functions
Examples_of_anonymous_functions
Uniquely identifies national and EU laws
legislation (extract): <meta about="https://www.boe.es/eli/es/lo/2013/12/20/9" typeof="http://data.europa.eu/eli/ontology#LegalResource"/> <meta about="https://www
European Legislation Identifier
European_Legislation_Identifier
TYPEOF
TYPEOF
TYPEOF
TYPEOF
Boy/Male
Hindu, Indian
God Name in Udagatti
Girl/Female
Chinese, French, German, Teutonic
Refuge from War; Happy Battle; Contending War
Boy/Male
French German Teutonic
Guards wisely.
Girl/Female
Arabic, Muslim
Wise Thought
Boy/Male
Tamil
Dayaananda | தயாநஂதா
One who takes Joy in being merciful
Boy/Male
French
From the field.
Girl/Female
Gujarati, Hindu, Indian, Modern
Happiness
Girl/Female
Arabic, Muslim
Rare
Girl/Female
Tamil
Spellbound
Boy/Male
Indian
Intelligent, Brilliance
TYPEOF
TYPEOF
TYPEOF
TYPEOF
TYPEOF