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The Racket language is a modern dialect of Lisp and a descendant of Scheme. It is designed as a platform for programming language design and implementation. [9] In addition to the core Racket language, Racket is also used to refer to the family of programming languages [10] and set of tools supporting development on and with Racket. [11]
If the tiebreak score gets to 6–6, then whichever player to win the best of two points wins the set. [23] Unlike games, set scores are counted in the ordinary manner (1, 2, 3, etc.), except that the state of having won zero games is called "love". The score is called at the end of each game, with the leading player's score first (e.g.
The primary influences were Lisp Machine Lisp, Maclisp, NIL, S-1 Lisp, Spice Lisp, and Scheme. [51] It has many of the features of Lisp Machine Lisp (a large Lisp dialect used to program Lisp Machines ), but was designed to be efficiently implementable on any personal computer or workstation.
Mostly based on Scheme and Common Lisp, was designed as system and application programming language by Apple; first used to write an operating system and applications for internal prototypes of the later released Apple Newton computer; first official version of Apple Dylan also had s-expression based syntax; Apple collaborated with partners to ...
Lisp was originally implemented on the IBM 704 computer, in the late 1950s.. The popular explanation that CAR and CDR stand for "Contents of the Address Register" and "Contents of the Decrement Register" [1] does not quite match the IBM 704 architecture; the IBM 704 does not have a programmer-accessible address register and the three address modification registers are called "index registers ...
In the usual parenthesized syntax of Lisp, an S-expression is classically defined [1] as an atom of the form x, or; an expression of the form (x. y) where x and y are S-expressions. This definition reflects LISP's representation of a list as a series of "cells", each one an ordered pair. In plain lists, y points to the next cell (if any), thus ...
Wadler criticized in particular the lack of pattern matching, obscuring equational reasoning and making the teaching of proofs harder; the lack of algebraic data types in Scheme and the over-reliance on cons pairs for both code and data representation, which can confuse beginning students; and the choice of strict instead of lazy evaluation as ...
In 2001, Paul Graham announced that he was working on a new dialect of Lisp named Arc.Over the years since, he has written several essays describing features or goals of the language, and some internal projects at Graham's startup business incubator named Y Combinator have been written in Arc, most notably the Hacker News web forum and news aggregator program.