put cursor on the right of a bracket, then xah-delete-backward-char-or-bracket-text. Lists in Lispy are implemented as linked lists of cons cells, from which we derive the axioms of car, cdr, and cons. Note that it is very important to set a reasonable value for the maxNumEntries parameter, which is the maximum number of distinct entries that the bloom filter can represent without increasing the false positive rate. g. py This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. Then you can use the fact that an S-expression is simply "a single symbol" or "a list of S-expressions". I have also seen that lispy, which is usually used for Lisp code also supports Python. For i 1 to k A h i x 1. LISP: [noun] a computer programming language that is designed for easy manipulation of data and is used extensively for work in artificial intelligence. Using the -n or --no-core option prevents Lispy from loading and evaluating the Lisp core (core. header. Slice and dice your data as early as possible. Only ones so far is `, which just parses the next expression and wraps it up in a (quote <expression>) and a ,, which will unquote within a quote (technically it just parses the next expression and wraps it in a (unquote <expression>) that can be detected by the main quote, not entirely done yet, but the read macro’s exist). 7. " def read_ahead(token): if '(' == token: L = [] while True: token = inport. M-J to join two nodes. * For both substitution constructs, if the resulting string starts with a '[', Splunk interprets the string as a Splunk LISPY expression. I'm having difficulty with the advance power user, so was looking to learn from experienced San Antonio Splunk experts to grow myself and be a person to grow our community as well. Splunk uses lispy expressions to create bloom filters. Following are some of the important points to note −. Emacs makes it easy: Start Emacs. Instead,. Save the function in another file. Looks reasonable to me. Visual Studio 2022 ships with decompilation. I think lispy--edebug. This . Returns self. Starting with your code from chapter 4, you can rename the file to parsing. py> is the. Just a suggestion: you don't have to use a REPL with lispy. As always it may be useful to bring search config to indexers just for the case of troubleshooting by launching searches directly on an indexer, but that's very much a. Using the core-less mode is not recommended because many standard definitions are included in core. Originally specified in 1960, Lisp is the second-oldest high-level programming language still in common use, after Fortran. the lispy expression (a (b c)) could be represented as the Prolog list ['(', a, '(', b, c, ')', ')']. Fields used in Data Models must already be extracted before creating the datasets. You can use predicate expressions in the WHERE and. The output is not "broken" or "nonsensical". It checks that each special form has the right number of arguments and that set! and define operate on symbols. Example – Suppose we want to enter “geeks” in the filter, we are using 3 hash functions and a bit array of length 10, all set to 0 initially. No need to be fancy, just an overview. 3. Warm bucket- Read only then cold then. compile{ (join (restrict :suppliers, lambda{ city == 'London' }), :cities) } Alf is also an educational tool, that I've written to draw people's attention about the ill-known relational theory (and ill-represented by SQL). Some people find lispy too weird and/or complex to try, quite possibly because of it's sort-of-modal key binding structure. In this essay I make the implementation, lispy. Although it is less concise, the example above illustrates the selling point of writing regular expressions at a higher level: it is more understandable, comfortable to write and easier to maintain. It checks that each special form has the right number of arguments and that set! and define operate on symbols. NET and Unity assemblies. Lispy also offers much more commands than ParEdit, focusing on faster move, inline help, code evaluation, semantic transformation of Lisp code, etc. There is a difference between. The Splunk CIM Add-on includes data models in a __________ format. Splunk user roles decide what the user can see, do, interact with Splunk with the access. In this essay I make the implementation, lispy. lispy(Alf::Environment. if you turn on your LIPSY (an expression Splunk uses to locate events, it can be turned on in limits. We suggest adding all questions to a survey before adding skip logic as moving questions after adding skip logic may impact the flow of the survey. Machine data makes up for more than ___% of the data accumulated by organizations. Default: _raw. 6. Perhaps I've just overlooked it, but I haven't seen anything like that in lispy. Automaticaly insert '~' Symbol before and after a "Marked Expression" 0. Contribute to e-dorigatti/lispy development by creating an account on GitHub. Their main on-the-surface difference is in that Lispy adheres to shorter commands, while Paredit sticks to Emacs-style keybindings 2, and Smartparens has both its own set and Paredit-like set:Reverse chine hull design for drier ride & better handling. py, three times more complicated, but more complete. The lispy program shown above highlights the basics of Perl lambdas and higher-order functions. Both programs and data are represented as s-expressions: an s-expression may be either an atom or a list. Lispy also offers much more commands than ParEdit, focusing on faster move, inline help, code evaluation, semantic transformation of Lisp code, etc. Main features: Debug . Gay "lisp". Use C-M-f and C-M-b (forward-sexp and backward-sexp) to move in units of s-expressions. There are a plethora of . To check if the search actually runs even when it is hidden, you should go to your job history and see if the search has ran even though the token didn't exist and the panel didn't show. Question: When is a bucket’s bloom filter created? Answer: When a search is run. Introduces new definitions in the context. The basic conditional to be used with the previously described predicates. conf talk that @martin_mueller gave in 2016 and 2017 is a good lispy resource; it includes demos in the Job Inspector as well as some theory behind best search practices. See full list on github. Write a predicate tree_ltl(T. Splunk uses lispy expressions to create bloom filters. A wrapper around the. | eval sum_of_areas = pi () * pow (radius_a, 2) + pi () * pow (radius_b, 2) 6. (B) Comments must be placed at the end of a search. Just obtain a Lispy instance on an environment and you're ready: # # Expressions can simply be compiled as illustrated below. kandi ratings - Low support, No Bugs, No Vulnerabilities. AND OR NOT. AND OR NOT. Study with Quizlet and memorize flashcards containing terms like True, False, wildcard and more. In a recent question about a DSL I tried to mix DSL expressions with expressions of the embedding language which happens to be procedural (in that case. 5 people like it. to pronounce "s" and "z" sounds like "th" 2. Hypster and Hy Society. This ability was present for Elisp for a very long time, and it's instrumental to my Elisp output. Header object, which handles the getting and setting of information stored in the laspy header record of simple. The first element of. lispy. In this essay I make the implementation, lispy. C-j. py and I was wondering how I could change the code so that the arithmetic operations work on a general amount of . We use the # examples environment here, see the dedicated section later about other # available environments. The Splunk platform uses Bloom filters to decrease the time it requires to retrieve events from the index. 3 Press Ctrl+c to Exit lispy> / 10 0. Download: latest release | latest CI build (master) | Microsoft Store (RTM versions only) Decompiler Frontends. NET and Unity assemblies. lispy includes auto-formatting functionality (lispy on melpa) ElispFormat produces idiomatic elisp, but seems to have right-shift problems - going over the fill column width. java","path":"py/Sudoku. What does the Mvfilter command filter on? A boolean expression. Warm bucket- Read only then cold then. The new version checks each expression for validity when it is defined. A list starting with a non-keyword, e. Frozen bucket – deletion and archiving. One of the advantages of a specialized mode for structural edits is that the keybindings become much simpler – no chords needed – and editing is smoother and faster. false. 8 If–then–else Expressions; 3. Everything else is a list expression: a " (", followed by zero or more expressions, followed by a ")". JSON. Integration of emacs and Hy; 8. Hello Team, I'm just now doing the introductory training, but if this would be an online event, I'd be interested in attending any "learningNotice how we didn’t try to evaluate the expression [1, 2] because it was quoted. 10. These are F# solutions of Ninety-Nine Haskell Problems which are themselves translations of Ninety-Nine Lisp Problems and Ninety-Nine Prolog Problems. For example, 'INDEXED_VALUE=source::*<VALUE>*' takes a search for 'myfield=myvalue' and searches for 'source::*myvalue*' in the index as a single term. In this example, each lambda has only one expression in its body—a simplification that befits the. Motivation. the lispy expression (a (b. {"payload":{"allShortcutsEnabled":false,"fileTree":{"02-array-seq/lispy/py3. Rather, the "lispyness" of the expressions is more appropriate in the style and heart of Emacs, working with symbolic expressions. For example, evaluating the expression (+ 1 ""), with debug-on-error bound to t, produces. Alf. Select Lisp Expression. What are the basic building blocks of S-expressions? a) Atoms b) Lists c) Numbers d) Predicates View Answer. 0 4) Eval: 7. McCarthy's original Lisp converted to Common Lisp by Paul Graham ( local copy, original download) Luciano Ramalho. c from the mpc repo. A tag already exists with the provided branch name. Business, Economics, and Finance. (1 + 2) ; is a valid expression in a text, `READ` can read it. We will extend our lval structure to be able to represent it. Machine data makes up for more than ___% of the data accumulated by organizations. The point I want to get across is that your Racket code is as much a data structure as a Python list or an HTML document. log Enable the old-‐fashioned header in limits. Some killer features in Emacs, which I would recommend checking out, is imenu and movement by s-expression (functions like forward-sexp). Decide which question you would like to skip or display based on a CSL Expression. Community; Community; Getting Started. } maps to (op a b. In short, whenever you see (add 1 2), it's basically the same as add(1, 2). First, copy-paste the common parts: repl, redu = cse(K) for variable, expr in repl: print(f"{variable} = {expr}")m - lispy-mark-list: marks current expression; i - lispy-tab (mnemonic for indent or inner): marks the car of current expression; j - lispy-down (vi shortcut to move down): moves the point and mark down by one sexp, selecting the quoted expression; i - lispy-tab: selects the car of the quoted expression, i. JetBrains has the excellent dotPeek and Telerik has JustDecompile. To commemorate the release of CIDER 0. Lispy is Peter Norvig’s subset of Scheme written in Python. Some killer features in Emacs, which I would recommend checking out, is imenu and movement by s-expression (functions like forward-sexp). Interpreter for Scheme (A dialect of LISP) in Python. That is the reason why there are no names for facial expressions themselves, but only for the facial expressions of emotions. Ch3 study set Learn with flashcards, games, and more — for free. Instead, I edit all code in place in the source file, and use e to eval the current sexp. eazy-gnuplot - a lispy, structure-less Gnuplot library. the resultof evaluating a Lispy expression can be represented as a double-precision number. Then, evaluate lispy expressions and optimize searches, use the makeresults command to test a regex expression, generate summary statistics with the fieldsummary command, and use informational functions to gain insights about search results. Remember what I said before? Lispy syntax. There are lists of the major and minor. That allows you to create your own control structures, change existing control structures or change the way expressions are evaluated. 7","contentType":"directory"},{"name":"lis. Unless told a list is data, Lispy treats list as function calls where the first argument is the function and the rest as the arguments of the function. These are similar to their Java counterparts, except that in Scheme, operators such as + and > are symbols too, and are treated the same way as A and fn. In Norvig's original version of Lispy, there are 6 of these: quote, if, set!, define, lambda, and begin. 5. (fn. The interpreter have very good integration with JavaScript. It uses S-expressions to denote both code and data structure. Warm bucket- Read only then cold then. So, Python, Haskell, Erlang, etc, all have list comprehensions, which cover Map and Filter, with very nice syntax IMHO. Starting with an active region, the region will be deactivated and result will be inserted at point. You can use C-M-SPC M-; to mark the S-expression ( C-M-SPC for mark-sexp) and then comment it ( M-; for comment-dwim ). Finally, Matlab's jit, I have found, is incredibly good at producing optimized code, these days even from very poorly vectorized source. To select a lisp expression, xah-extend-selection once or twice. Transform the current list expression into a let-bound variable; iedit-mode is used to name the new variable. ##### Scheme Interpreter in Python ## (c) Peter Norvig, 2010; See ##### Symbol, Procedure, classes from __future__ import division. For example, a=5 above actually looks like the print function has an. With the If-Else statement, you have three expressions: […] LISPy-JSON 4: Comparison and Boolean operators in an Interpreter. The user types in expressions at the command line, or directs the IDE to transmit them to the Lisp system. I went through the code in. This strategy is effective when you search for rare terms. COVID-19 Response SplunkBase Developers DocumentationThe goal for this part is to implement (if predicate consequent alternate). Contribute to eregon/alf development by creating an account on GitHub. Expanding foam injected into hull cavities for added hull stiffening, flotation & a quieter ride. Hello I am following the code in the book and in this chapter I am getting Segmentation fault: 11, I read on the internet that is caused by uninitialized access to data. For example, 'INDEXED_VALUE=source::*<VALUE>*' takes a search for 'myfield=myvalue' and searches for 'source::*myvalue*' in the index as a single term. Press c. Like the snippet! Ninety-Nine F# Problems - Problems 70 - 73 - Multiway Trees. 4 projects | /r/emacs | 30 Mar 2023. In Lisp, this structure is commonly called an S-Expression standing for Symbolic Expression. And, to some extent, C++ qualifies too. You can use predicate expressions in the WHERE and HAVING clauses. Write a predicate tree_ltl(T. 2, lispy is by default only visible in search. A wild card at the beginning of a search. BuildYourOwnLisp的中文翻译. We can represent this sequence of tokens as a Prolog list; e. . I like that syntax for big hierarchical expressions, if you really really really don't like it, then you can probably stop right here, though you'll be losing out! I've warned you. These are F# solutions of Ninety-Nine Haskell Problems which are themselves translations of Ninety-Nine Lisp Problems and Ninety-Nine Prolog Problems. py. The eval expression must be wrapped by "{" and "}". False. relative_time(X,Y): Uses client time zone. "Universal" means that the machine is programmable: with some. These are the most common: (insert "foo" "bar") - to insert text at point. Why not aliases? Especially since these underpin the CIM to a great extent. Works same as above in reverse. (delete-region start end) - to delete the region of text. False. After some experimenting I am at the point of abandoning the continuation of strict procedural syntax in favour of a lispy style, i. c directly into the compile command. A Lisp Family language written in approx. py, three times more complicated, but more complete. These breakers are characters like spaces, periods, and colons. IMHO you can now use predicate_merge fairly safely. #to_summarization ⇒ Object . Bucket– journal has the raw data, and the tsi (timeStamp index) file – index keys to journal file has a unique lexicon Answer: A lispy expression. GitHub Gist: instantly share code, notes, and snippets. truth by comparing an expression's value against the variable *true-enough* and execute the truth consequent if the expression is equal to or greater than *true-enough. Which of the following conditions could cause a lispy expression to not create tokens? (A) A wildcard at the beginning of a search (B) A wildcard at the end of a search (C) A major breaker in the middle of a search (D) A minor breaker in the middle of a search A wildcard at the beginning of a search 11/4/2022. Step 4. Running with no core. This works on parenthesized expressions or strings. Relational Algebra at your fingertips. I have also seen that lispy, which is usually used for Lisp code also supports Python. 10":{"items":[{"name":"examples_test. Most examples show the grammar as defined by PLGrammar and some example strings that could be parsed. Step Over. Some killer features in Emacs, which I would recommend checking out, is imenu and movement by s-expression (functions like forward-sexp). Great integration with JavaScript. . Light and dark themes. Each section handles an addition. {"payload":{"allShortcutsEnabled":false,"fileTree":{"original/norvig":{"items":[{"name":"py2. las. Origin of the name "fexpr" In early Lisp, the environment mapped each symbol to an association list, rather than directly to a value. Contribute to Hard-bitten/BuildYourOwnLispGitbookCN development by creating an account on GitHub. 25. As far as I understand the string "action" is not found in tsidx file as it is returned as a field value from a automatic lookup and that's why our first LISPY does not provide any data and the SPL gives back 0 results. (insert-buffer-substring-no-properties buffer start end) - insert text from. I like that syntax for big hierarchical expressions, if you really really really don't like it, then you can probably stop right here, though you'll be losing out! I've warned you. All of its dependencies except for GPG (with which signed maps and releases are verified) are. lispy AST printer and reader. False. This library requires that tree-sitter and the desired parser modules are compiled as shared libraries and are located somewhere that CFFI can find them. A new field called sum_of_areas is created to store the sum of the areas of the two circles. Data is segmented by separating terms into smaller pieces, first with major breakers and then with minor breakers. Pressed-in hull strakes for enhanced performance. py > (circle-area (+ 5 5)) 314. Usage. For example, 'INDEXED_VALUE=source::*<VALUE>*' takes a search for 'myfield=myvalue' and searches for 'source::*myvalue*' in the index as a single term. . ). In this step it might be possible to modify the original ruby program by working on its lispy representation. S-expressions were invented for and popularized by the programming language Lisp , which uses them for source code as well as data. Let’s start with the obvious: the time range picker. This can be used in conjunction with any other option. In the first step, the lambda expression is evaluated to create a procedure, one which refers to the global variables pi and *, takes a single parameter, which it calls r . These are similar to their Java counterparts, except that in Scheme, operators such as + and > are symbols too, and are treated the same way as A and fn. c","path":"error_handling. Frozen bucket – deletion and archiving. The first element of the list determines what it means: A list starting with a keyword, e. It…Implement lispy with how-to, Q&A, fixes, code snippets. The search-optimizer runs at the initial comprehension of the search string, so should only be relevant or be used on a search head. c","contentType":"file"},{"name":"evaluation. To explain why parentheses are important let’s look at this small part of Rust code from some imaginary program: let foo = 10; let bar = foo + 32; foo * bar. Shortly after Go. basic. If an expression has side effects, they will be visible afterwards (e. To evaluate a single expression, run Lispy with the -e or --evaluate option and supply the expression as an argument. These are built into Emacs and make navigating across or inside blocks of code very easy. Frozen bucket – deletion and archiving. Level 2: Provides a deep understanding that will allow you to be one of the most advanced searchers, and make more efficient searches. * For both substitution constructs, if the resulting string starts with a '[', Splunk interprets the string as a Splunk LISPY expression. A predicate expression, when evaluated, returns either TRUE or FALSE. The interpreter is written in C using the MPC library for parsing operations, and it currently can be used as an Interactive Prompt to evaluate expressions in real time or to evaluate external files written in Lispy. The basic numeric operations in LISP are +, -, *, and /. It checks that each special form has the right number of arguments and that set! and define operate on symbols. py interpreter. An explanation of nil; 3. Repo to keep a backup and progress of following this - book - lispy/q_expressions. The conditions that could cause a lispy expression to not create tokens are a major breaker in the middle of a search and a minor breaker in the middle of a search. The "lispy" representation of a multiway tree is a sequence of atoms and parentheses '(' and ')', which we shall collectively call "tokens". Therefore, the correct option is C and D. A predicate expression, when evaluated, returns either TRUE or FALSE. Hot bucket- stores data as it arrives. 1 Template for a save-excursion. add, nbrs, 0) – JohanL. (C) A. Example – Suppose we want to enter “geeks” in the filter, we are using 3 hash functions and a bit array of length 10, all set to 0 initially. c at master · bIgBV/lispy. You can use this function with the eval and where commands, in the WHERE clause of the from command, and as part of evaluation expressions with other commands. Gives out very pretty output, with minor diffs for actual code, which is quite impressive considering all. No License, Build not available. Instance Method Details #finalize(aggs) ⇒ Tuple. A major breaker refers to a character that breaks a lispy expression into multiple parts, such as Fields Indexed Tokens and You - Splunk ##### Lispy: Scheme Interpreter in Python ## (c) Peter Norvig, 2010-16; See from __future__ import division import math import operator. So three questions arise from this: 1. Forward/Backward/Up/Down movement and selection by s-expressions. A suggestion inline. If you want to deactivate the region in a fancy way and put the point at the very start of the string, you can press idm: i will select the inner contents of the string. The result depends on the following conditions, each tried one by one until one that holds true is found: A predicate is an expression that consists of operators or keywords that specify a relationship between two expressions. Example: (+ 2 2) Pressing C-u C-x C-e gives: (+ 2 2)4. Bucket– journal has the raw data, and the tsi (timeStamp index) file – index keys to journal file has a unique lexicon11. g. lis. 1. 3. (D) Comments must be placed at the beginning of a search. When creating lispy, splunk will use lookups and field extractions from search time, presumably because they are in the knowledge bundle. But if the bit is 1, then that input might be a member of a set. Point and Mark; 3. It checks that each. Robotically welded, all-aluminum box-beam transom w/corner braces welded in to unitize & strengthen the hull. For example, 'INDEXED_VALUE=source::*<VALUE>*' takes a search for 'myfield=myvalue' and searches for 'source::*myvalue*' in the index as a single term. Where can comments be placed in a search?*** (A) Comments can be placed anywhere, provided they follow a pipe. Our structure will be similar to Norvig’s tutorial, though I depart slightly in two ways: Instead of 2 stopping points (Lispy Calculator and Full Lispy), we have 4 stopping points. Example Syntax. But probably not. and (always (), eq (variables ['Build. If a search begins with a distributable streaming command, where is it first executed? The expression is then usually used for a textual version of Lisp data object - which is not necessarily code. Splunk uses lispy expressions to create bloom filters. Macros and Extensible syntax. Literal regular expression. . How many values does the return command return? How many values does the return command return? This function, taking arguments left and right, is used to generate lispy-parens, lispy-braces and lispy-brackets, which in turn take prefix arg. I've created a text form input called 'username' to search for usernames in my dashboard panels and i've set the token value to 'user_name' Now, I'm trying to add the above token value to this search string which filters out all the users with failed loginsFor example, if your child has a frontal lisp and has trouble with “s” sounds, the SLP will practice words that start with that letter. Returns a ruby literal for this expression. : Lookups Lookups add field-value combinations from lookup tables to event data and can break if Splunk software is. Lisp (historically LISP, an acronym for "list processing") is a family of programming languages with a long history and a distinctive, fully parenthesized prefix notation. Comments can be placed anywhere inside a search. If they were numbers, they will stay as. Hot bucket- stores data as it arrives. 125 aluminum Deep V hull w/wide beam. c and download mpc. ), is a special form ; the meaning depends on the keyword. File object inFile has a reference to the laspy. An expression is data as text. So three questions arise from this: 1. py. Bloom filter performs the below steps as a part of the Lookup operation: Hash the input value. 9. Warm bucket- Read only then cold then. The following table describes the order in which the Boolean expressions are evaluated. With a binary operator you evaluate the two expressions and operate on the result. Lisp reads the entered expressions, evaluates them, and prints the. Most examples show the grammar as defined by PLGrammar and some example strings that could be parsed. If you have evil enabled, lispy will additionally configure the lispyville package that adds Evil keybindings to lispy. There's a lot of great low-level stuff in this space. 5 in 1962, the world's first self-hosting compiler) to the modern day (Clojure), and as Wikipedia states, "most substantial Lisp systems also include a compiler" and "some Lisp systems compile every expression to native machine code. Just like lisp-macros do. Note: This post is a continuation of LISPy-JSON Part 1, Part 2 and Part-3, you should read these prior to reading the current post. This library requires that tree-sitter and the desired parser modules are compiled as shared libraries and are located somewhere that CFFI can find them. conf23 User Conference | SplunkS-expressions or symbolic expressions are the syntactic elements of the LISP programming language. The evaluation behaviour of S-Expressions is the behaviour typical of Lisps, that we are used to so far. py","path":"02-array-seq/lispy/py3. The new command, lispy-goto-elisp-commands, is bound to oge. LISP expressions are case-insensitive, cos 45 or COS 45 are same. The program crashed upon trying to divide by zero. Some math; 6. With its cookbook. Which of the following conditions could cause a lispy expression to not create tokens? A major breaker in the middle of a search. 5. In this code we declare two immutable variables: foo, and bar, and assign values 10, and 42 to them respectively. Search strings are sent from the _________. Returns a lispy expression. This reflects the phases I took to build it in Rust. 5. 0, it can also be an aggregation function applied to a arbitrary eval expression. With a binary operator you evaluate the two expressions and operate on the result. Use tree-sitter via Common Lisp. Splicing is the act of removing the current S-expression and joining (some of) the contents with the enclosing S-expression. g. kandi ratings - Low support, No Bugs, No Vulnerabilities. You may have your own source libraries or other libraries not mapped by the Lispy project. # lispy = Alf. The order in which the Splunk software evaluates Boolean expressions depends on whether you are using the expression with the search command or the where command. There are two splices that will kill the content of the current S-expression either to the front of rear of the cursor. Which of the following conditions could cause a lispy expression to not create tokens? A major breaker in the middle of a search; A wildcard at the beginning of a search; A wildcard at the end of a search; A minor breaker in the middle of a search; Where in the search pipeline are transforming commands executed? On the search head; On. sexp <- "(+ (* 2 3) (* 3 5))"The lispy program shown above highlights the basics of Perl lambdas and higher-order functions. The Splunk platform uses Bloom filters to decrease the time it requires to retrieve events from the index. e. If you or your child has an interdental lisp, words like “sing” may be pronounced as “thing,” and words like “zebra” may be pronounced as. What do we still need? Only ones so far is `, which just parses the next expression and wraps it up in a (quote <expression>) and a ,, which will unquote within a quote (technically it just parses the next expression and wraps it in a (unquote <expression>) that can be detected by the main quote, not entirely done yet, but the read macro’s exist). the lispy expression (a (b c)) could be represented as the Prolog list ['(', a, '(', b, c, ')', ')']. Comon lisp s-expression have good compatibility with some deep learning frameworks to stack layers. I typically never type anything into the REPL buffer. h and mpc.