Examples of anonymous functions
Open-knowledge reference entry
In computer programming, an anonymous function (function literal, lambda function, or block) is a function definition that is not bound to an identifier. Anonymous functions are often arguments being passed to higher-order functions or used for constructing the result of a higher-order function that needs to return a function.
If the function is only used once, or a limited number of times, an anonymous function may be syntactically lighter than using a named function. Anonymous functions are ubiquitous in functional programming languages and other languages with first-class functions, where they fulfil the same role for the function type as literals do for other data types.
Anonymous functions originate in the work of Alonzo Church in his invention of the lambda calculus, in which all functions are anonymous, in 1936, before electronic computers. In several programming languages, anonymous functions are introduced using the keyword lambda, and anonymous functions are often referred to as lambdas or lambda abstractions. Anonymous functions have been a feature of programming languages since Lisp in 1958, and a growing number of modern programming languages support anonymous functions. (Full article...)
Examples of anonymous functions
Numerous languages support anonymous functions, or something similar.
APL
Only some dialects support anonymous functions, either as dfns, in the tacit style or a combination of both.
C (non-standard extension)
The anonymous function is not supported by standard C programming language, but supported by some C dialects, such as GCC and Clang.
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