Generator (computer programming): Difference between revisions

Revision as of 01:37, 15 November 2015

Revision as of 06:10, 24 November 2015

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===Racket===

[[Racket (programming language)|Racket]] provides several related facilities for generators. First, its for-loop forms work with ''sequences'', which are a kind of a producer:

<source lang="schemeracket">

(for ([i (in-range 10 20)])

(printf "i = ~s\n" i))

</source>

and these sequences are also first-class values:

<source lang="schemeracket">

(define 10-to-20 (in-range 10 20))

(for ([i 10-to-20])

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But more directly, Racket comes with a generator library for a more traditional generator specification. For example,

<source lang="schemeracket">

#lang racket

(require racket/generator)