Lab 12:https://inst.eecs.berkeley.edu/~cs61a/sp21/lab/lab12/ Q2: Replicate scheme的tail-recursion比python快得多,需要辅助函数 (define(tail-replicatex n) (define(tail-replicate-optimizex n so-far) (if(=n0) so-far (tail-replicate-optimizex (-n1) (consx so-far))) (tail-replicate-o...
Lab 12:https://inst.eecs.berkeley.edu/~cs61a/sp21/lab/lab12/ Q2: Replicate scheme的tail-recursion比python快得多,需要辅助函数 (define (tail-replicate x n) (define (tail-replicate-optimize x n so-far) (if (= n 0) so-far (tail-replicate-optimize x (- n 1) (cons x so-far)))...
In Lisp-like languages, iteration is often implemented (by programmers) using a stylized form of recursion. If the last action executed by a function is a call, that call is known as a tail call. For example, to find the last element of a list in Scheme, the programmer might write the...
Scheme is a dialect of Lisp, one of the oldest programming languages still in use today. Lisp was the first language to implement conditionals, first class functions (lambdas), closures and recursion. Some Lisp features, such as closures and macros, have yet to penetrate mainstream languages and...
其实对于递归没有太多可说的,但一定要注意的是尾递归(tail-recursion)。尾递归使得用递归的形式实现递推成为可能。 blog.chinaunix.net|基于3个网页 2. 尾端递回 尾端递回(tail-recursion)的特色是递回呼叫没有内涵在任何一个尚未执行完成的式子(expression)内。 以下面的例子而言, … ...
However, .NET platform needs to support all sorts of languages including those like scheme where the only way to do iteration is to convert the code into tail-recursion and the compiler is supposed to do the above mentioned optimization.
ColorForth guarantees TailCallOptimization. ColorForth simply converts "CALL sub; RET" to "JMP sub". Like Scheme, ColorForth encourages the use of TailRecursion to implement iteration. It is (or can be) a bit more complicated than that though; consider a procedure consisting of only a two ...
Scheme is a dialect of Lisp, one of the oldest programming languages still in use today. Lisp was the first language to implement conditionals, first class functions (lambdas), closures and recursion. Some Lisp features, such as closures and macros, have yet to penetrate mainstream languages ...
D.: The scheme 311 compiler: An exercise in denotational semantics, in ACM Symposium on Lisp and Functional Programming, New York, 1984, pp. 356–364. Clinger, W. D.: Proper tail recursion and space efficiency, ACM SIGPLAN Notices 33(5) (1998), pp. 174–185. Proc. SIGPLAN '98 ...
Full tail biting is achieved while maintaining the recursion of turbo codes. In addition, a method is provided to allow a tail biting, frame oriented, turbo codes to be constructed. The reduction in the number of bits used for overhead this invention achieves an increase in the data ...