lisp | Lisp In Small Pieces на русском языке | Chat library

 by   ilammy HTML Version: v.1.2 License: Non-SPDX

kandi X-RAY | lisp Summary

kandi X-RAY | lisp Summary

lisp is a HTML library typically used in Messaging, Chat applications. lisp has no bugs, it has no vulnerabilities and it has low support. However lisp has a Non-SPDX License. You can download it from GitHub.

Это перевод на русский язык «широко известной в узких кругах» книги Кристиана Кеннека «Les Langages Lisp» (aka Lisp in Small Pieces). Книга затрагивает основы построения интерпретаторов и компиляторов Лиспа (в первую очередь его диалекта Scheme), а также разнообразие вариантов понимания семантики его конструкций и возможностей вроде окружений, замыканий, исключений, продолжений, рефлексии и макросов.
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            kandi-support Support

              lisp has a low active ecosystem.
              It has 181 star(s) with 22 fork(s). There are 16 watchers for this library.
              OutlinedDot
              It had no major release in the last 12 months.
              There are 1 open issues and 2 have been closed. On average issues are closed in 221 days. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of lisp is v.1.2

            kandi-Quality Quality

              lisp has no bugs reported.

            kandi-Security Security

              lisp has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              lisp has a Non-SPDX License.
              Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

            kandi-Reuse Reuse

              lisp releases are available to install and integrate.
              Installation instructions are not available. Examples and code snippets are available.

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            lisp Key Features

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            lisp Examples and Code Snippets

            No Code Snippets are available at this moment for lisp.

            Community Discussions

            QUESTION

            Common Lisp: where is default test for MEMBER, FIND, and POSITION specified?
            Asked 2021-Jun-15 at 05:01

            I'm looking at the Common Lisp HyperSpec and I don't see where the default test for MEMBER, FIND, and POSITION is specified. Am I overlooking something obvious?

            Word on the street is that EQL is the default test, but I would feel more comfortable knowing that's in the spec somewhere.

            ...

            ANSWER

            Answered 2021-Jun-15 at 04:28

            This can be found here in the HyperSpec: 17.2.1 Satisfying a Two-Argument Test. A list of sequence functions, including member, find, and position, is given. These functions take a two-argument :test or :test-not argument.

            If neither a :test nor a :test-not argument is supplied, it is as if a :test argument of #'eql was supplied.

            Source https://stackoverflow.com/questions/67979756

            QUESTION

            Lisp tree insertion
            Asked 2021-Jun-13 at 15:55

            I made a lisp code that transforms a list of numbers into a tree. The rules of the tree are that the value of the left child node should always be smaller than the value of its parent node and the value of the right child node should always be higher than the value of its parent node.

            Here is my lisp code:

            ...

            ANSWER

            Answered 2021-Jun-13 at 15:55

            You are modifying list but not returning it.

            Here is what you need to do:

            Source https://stackoverflow.com/questions/67959506

            QUESTION

            Common Lisp: Any way to avoid defvar or defparameter?
            Asked 2021-Jun-12 at 15:04

            I'm using SBCL 2.0.1.debian and Paul Graham's ANSI Common Lisp to learn Lisp.

            Right in Chapter 2 though, I'm realizing that I cannot use setf like the author can! A little googling and I learn that I must use defvar or defparameter to 'introduce' my globals before I can set them with setq!

            Is there any way to avoid having to introduce globals via the defvar or defparameter, either from inside SBCL or from outside via switches? Do other Lisp's too mandate this?

            I understand their value-add in large codebases but right now I'm just learning by writing smallish programs, and so am finding them cumbersome. I'm used to using globals in other languages, so don't necessarily mind global- / local-variable bugs.

            ...

            ANSWER

            Answered 2021-Jun-11 at 11:29

            If you are writing programs, in the sense of things which have some persistent existence in files, then use the def* forms. Top-level setf / setq of an undefined variable has undefined semantics in CL and, even worse, has differing semantics across implementations. Typing defvar, defparameter or defconstant is not much harder than typing setf or setq and means your programs will have defined semantics, which is usually considered a good thing. So no, for programs there is no way to avoid using the def* forms, or some equivalent thereof.

            If you are simply typing things at a REPL / listener to play with things, then I think just using setf at top-level is fine (no-one uses environments where things typed at the REPL are really persistent any more I think).

            You say you are used to using globals in other languages. Depending on what those other languages are this quite probably means you're not used to CL's semantics for bindings defined with def* forms, which are not only global, but globally special, or globally dynamic. I don't know which other languages even have CL's special / lexical distinction, but I suspect that not that many do. For instance consider this Python (3) program:

            Source https://stackoverflow.com/questions/67934577

            QUESTION

            Is generic dispatch in Common Lisp Object System the same as Dynamic Dispatch in classic OOP?
            Asked 2021-Jun-09 at 09:04

            I am reading the book Object Oriented Programming in Common Lisp from Sonja Keene.

            In chapter 2, the author says:

            The procedure for determining which methods to call and then calling them is called generic dispatch. It happens automatically whenever a generic function is called.

            This reminds me of the Dynamic Dispatch definition which is (according to Wikipedia):

            Dynamic dispatch is the process of selecting which implementation of a polymorphic operation to call at run time. It is commonly employed in, and considered a prime characteristic of, object-oriented programming languages and systems.

            Unfortunately, the wikipedia does not have an entry about generic dispatch.

            Thus, I would like ask:

            1 - Are dynamic dispatch and generic dispatch basically the same thing? What are the similarities?

            2 - And what are the differences? Is dynamic dispatch some sort of subset of generic dispatch due to the flexibility of CLOS?

            ...

            ANSWER

            Answered 2021-Jun-09 at 06:32

            Yes, dispatch in CLOS is also dynamic (this is also called late binding).

            No, dynamic and generic dispatch are not the same thing, because the words generic and dynamic answer different questions.

            The point that the word dynamic makes is that the decision about which method(s) to call is made at run time. The contrast to that would be static dispatch (which some would not call dispatch but overloading), where the decision is made at compile time.

            The point that the word generic makes is that the decision about which method(s) to call is made on the basis of the type of all (required) arguments. The methods are attached to the generic function. The contrast to that would be class based dispatch, where the decision is made only on the class of the first argument and the methods are attached to that class.

            Source https://stackoverflow.com/questions/67896358

            QUESTION

            I need help to understand a lisp program that finds the depth of a list
            Asked 2021-Jun-07 at 21:26

            I need help to understand my code theoretically. Here is my lisp program:

            ...

            ANSWER

            Answered 2021-Jun-07 at 21:26

            Here is your code, slightly reformatted:

            Source https://stackoverflow.com/questions/67864458

            QUESTION

            Why mutating the list to be only its first element with this approach does not work in Common Lisp?
            Asked 2021-Jun-07 at 16:40

            I am trying to learn Common Lisp with the book Common Lisp: A gentle introduction to Symbolic Computation. In addition, I am using SBCL, Emacs, and Slime.

            By the end of chapter 10, on the advanced section there is this question:

            10.9. Write a destructive function CHOP that shortens any non-NIL list to a list of one element. (CHOP '(FEE FIE FOE FUM)) should return (FEE).

            This is the answer-sheet solution:

            ...

            ANSWER

            Answered 2021-Jun-07 at 16:15

            The point is about how parameters to functions are passed in Common Lisp. They are passed by value. This means that, when a function is called, all arguments are evaluated, and their values are assigned to new, local variables, the parameters of the function. So, consider your function:

            Source https://stackoverflow.com/questions/67863435

            QUESTION

            Why Slime's debugger is not evaluating this specific expression in the selected frame?
            Asked 2021-Jun-06 at 17:54

            I am trying to learn Common Lisp with the book Common Lisp: A gentle introduction to Symbolic Computation. In addition, I am using SBCL, Emacs, and Slime.

            By the end of chapter 10, the author discuss the useful break function. In order to provide a background context, he presents this problematic function:

            ...

            ANSWER

            Answered 2021-Jun-06 at 17:54

            If you navigate to the top frame in the debugger and press enter on that frame, you will see that commission is not known to the debugger as a local variable:

            Source https://stackoverflow.com/questions/67861723

            QUESTION

            Casting a void pointer (that is part of a struct) into another pointer data type
            Asked 2021-Jun-06 at 15:05

            I'm trying to figure out how to parse S-expressions in C on my own, in order to store data and code for my own rudimentary Lisp (written as a learning exercise, not for production).

            Before explaining my code and my reasoning, I should explain that all I know about S-expressions is the introductory section of the Wikipedia article on it, and the occasional glance at Common Lisp code, so the naming of my structs and variables may be a bit off.

            My language of implementation is C, and before I defined any functions I created the following structs:

            ...

            ANSWER

            Answered 2021-Jun-06 at 15:05

            Don't use void*. Use a union. That's what unions are for.

            In this example, I use an "anonymous union", which means that I can just refer to its fields as though they were directly inside the Atom struct. (I changed the spelling of names according to my prejudices, so that types are Capitalised and constants are ALLCAPS. I also separated the typedef and struct declarations for Atom, in case Atom turns out to be self-referential.

            Source https://stackoverflow.com/questions/67854202

            QUESTION

            Mysterious newline appears in Common Lisp format directive
            Asked 2021-Jun-06 at 14:51

            I'm running into an odd issue with Common Lisp's format directive that only shows itself in GNU CLISP, which leads me to wonder if it's a bug in the implementation.

            Consider the following code

            ...

            ANSWER

            Answered 2021-Jun-05 at 13:28

            This is a feature of GNU CLISP. See the documentation of *pprint-first-newline*.

            If you want a different output than that, bind either *print-pretty* or *pprint-first-newline* to nil during your format invocation.

            Source https://stackoverflow.com/questions/67845195

            QUESTION

            Why is dribble producing an empty file?
            Asked 2021-Jun-06 at 09:02

            I am trying to learn Common Lisp with the book Common Lisp: A gentle introduction to Symbolic Computation. In addition, I am using SBCL, Emacs, and Slime.

            By the end of chapter 9, the author shows the dribble tool. He shows the following:

            I tried to reproduce the commands presented by the author. Considering the inputs, the only difference was the fact that I put a different location to save the file. In my environment, I did:

            ...

            ANSWER

            Answered 2021-Jun-05 at 06:44
            1. Yes, by default, within Slime I don't think this works.

            2. It will work within the SBCL Repl:

            Source https://stackoverflow.com/questions/67845647

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

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            You can download it from GitHub.

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