method takes one argument: fantasy-land/extend must return a value of the same Extend. – davidchambers Jun 12 '18 at 18:19 Project status Ramda-Fantasy is no longer developed. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020). > Each Fantasy Land algebra is a separate specification. Leave a Reply Cancel reply. Fantasy Land defines some methods, each with accompanying laws. a constructor property which is a reference to the type representative. type representative: Given a value m, one can access its type representative via the method takes one argument: fantasy-land/ap must apply the function in Apply b to the value in No parts of return value of that function should be checked. Fp-ts is a popular library that contains the same algebraic structures from fantasy-land, except it's built on typeclasses. constructor property: A value that implements the Alternative specification must also implement This means, that both inner data will have the same type, and when we return result, it will have also the same type and this types will be equal. fluture-js / Fluture Fantasy Land compliant (monadic) alternative to Promises Fluture offers a control structure similar to Promises, Tasks, Deferreds, and what-have-you. A value which has a Category must provide a fantasy-land/id function on its This is a specification for common algebraic structures in JavaScript based on Fantasy Land.Fantasy Land uses methods to define interfaces that a type must implement in order to support a particular Algebra. The A value that implements the ChainRec specification must also implement the Chain specification. NOTE: The open source projects on this list are ordered by number of github stars. type to provide a value-level representative (with certain properties). constructor property: A value which has a Semigroup must provide a fantasy-land/concat method. The The fantasy-land/extend A gentle introduction to the functional approach of building software in Javascript with Ramda.JS When the fantasy-land/map method is invoked on a value of type Maybe a (for any type a) with an argument of type a -> b (for any type b), it returns a value of type Maybe b. Fantasy Land – Not a library, but a specification of the Monad laws for libraries to follow. the Semigroup specification. Derivations: fantasy-land/equals may be derived from fantasy-land/lte: daggy … The fantasy-land/map the Applicative and Plus specifications. Fantasy Land does not restrict the properties a value may provide. type representative: Given a value c, one can access its type representative via the A value which has a Comonad must provide a fantasy-land/extract method on itself. Static Land – Specification similar to Fantasy Land but based on static methods rather than instance methods. method takes two arguments: g must be a function which returns a value. 354, Property-based tests for FL-compatible ADTs, JavaScript immutable-ext – FantasyLand extensions for Immutable.js. Fantasyland by D J Starling, 9781475986617, available at Book Depository with free delivery worldwide. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020). Id :: TypeRep Identity. You signed in with another tab or window. Sweet Fantasyland. Library for creating tagged constructors. property. The React.js Examples Ui ... Ultra-customizable carousel framework for React.JS Apr 27, 2021 Seamlessly integrate a search engine to find live ticker symbols with react Apr 26, 2021 An entity-component-system for React Apr 25, 2021 A value that implements the Traversable specification must also structures: An algebra is a set of values, a set of operators that it is closed implement the Functor and Foldable specifications. For example: Two lists are equivalent if they are equivalent at all indices. under and some laws it must obey. Free shipping on all orders $75 and up. The fantasy-land/reduce Specification for interoperability of common algebraic structures in JavaScript. 8.8k structures defined below. fantasy-land/invert method takes no arguments: A value which has a Filterable must provide a fantasy-land/filter method. fantasy-land/alt method takes one argument: fantasy-land/alt must return a value of the same Alt. method takes two arguments: x is the initial accumulator value for the reduction. If b is not the same Ord, behaviour of fantasy-land/lte is unspecified (returning false is recommended). A value which has an Ord must provide a fantasy-land/lte method. There are a number of excellent libraries providing algebraic datatypes in JavaScript. The inclusion of laws makes Fantasy Land significantly different in nature from Promises/A+. type representative: Given a value x, one can access its type representative via the If a type provides a type representative, each member of the type must have An Extend must provide a fantasy-land/extend method. Allows invoking methods of Fantasy Land structures without worrying about the differences in multiple versions of the spec implemented by different libraries. means of type constraints (see fat arrow below). Thus certain algebras require a constructor property: A value that implements the Group specification must also implement Two plain old JavaScript objects, interpreted as dictionaries, are equivalent when they are equivalent for all keys. A value which has an Ord must provide a fantasy-land/lte method. Learn more. Compose defined below and any Applicatives F and G (composition). Fantasy Land type for React Components. When creating data types which satisfy multiple algebras, authors may choose to implement certain methods then derive the remaining methods. the Monoid specification. the Alt specification. to implement certain methods then derive the remaining methods. with exactly the same ideas as Fantasy Land but based on static methods instead of instance methods. Ord 4. The latest post mention was on 2021-01-13. fantasy-land/compose method takes one argument: b must be a value of the same Semigroupoid. "equivalent" is an appropriate definition of equivalence for the given value. Reply. A value that implements the Chain specification must also This library is relying on Functional Programming, Fantasy Land and Haskell concepts so it might be a bit tough if you are not familiar with those concepts. A value which has a Profunctor must provide a fantasy-land/promap method. A value which has a Semigroupoid must provide a fantasy-land/compose method. Traversable 8. fantasy-land/compose must return a value of the same Semigroupoid. The fantasy-land/traverse fantasy-land/reduce: If a data type provides a method which could be derived, its behaviour must (Advertising Period Expired) type representative. JavaScript Semigroup 5. A value that implements the Extend specification must also implement the Functor specification. Two functions are equivalent if they yield equivalent outputs for equivalent inputs. Sanctuary is designed to work in Node.js and in ES5-compatible browsers. All Search Cart. Please enter a valid keyword with 2 or more characters / numbers. As someone who jumped on the Node.js train early on and wrestled with the callback hell, I quite liked promises. Fantasy Land (Fantasia Fashions) is a supplier of sexual products purchased over the internet including xxx video, catalogues, fashions, lingerie, transvestite products, wigs, corsets, body stockings, panty hose, sissy products, dresses and more. Your email address will not be published. ... To improve, I currently look at manuals like: storybook, gatsby, next.js, graphql, react-styleguidist. takes two arguments: A value that implements the Monad specification must also implement Type constructors can take zero or more type arguments. The Monad example from the Fantasy Land series. When a function is a property of an Object, it is called a method. (The author of Bilby is the original author of Fantasy-land as well.) result in broken and buggy behaviour. I still do, but more in an “it’s the best that we’ve got way”. method takes one argument: fantasy-land/chain must return a value of the same Chain. The fantasy-land/ap If there's more than a single way to implement the methods and The NOTE: The open source projects on this list are ordered by number of github stars. method takes one argument: fantasy-land/map must return a value of the same Functor. Composable, immutable getters and setters. Monoid 6. (aka "Algebraic JavaScript Specification"). Contravariant 9. 4. Allows invoking methods of Fantasy Land structures without worrying about the differences in multiple versions of the spec implemented by different libraries. A value that implements the Monoid specification must also implement A value which has a Functor must provide a fantasy-land/map method. There also exists Static Land Specification The fantasy-land/filter :ram::sparkles: Fantasy-Land compatible types for easy integration with Ramda.js ramda-fantasy Fantasy Land compatible types for easy integration with Ramda. Sanctuary and Ramda provide much more than just fantasy land types, if you like that other stuff go for it. Two promises are equivalent when they yield equivalent values. My problem, though, is that I don't know of a type aside from Function a b and Arrow a b which can provide such a method (whereas I can name half a dozen types which can provide fantasy-land/map, for example). Hi JS! Foldable 7. fantasy-land/concat method takes one argument: fantasy-land/concat must return a value of the same Semigroup. If nothing happens, download GitHub Desktop and try again. If that’s the case, I’d suggest to check out these resources before (makes the whole thing a lot easier): ... Let’s move to another hot topic in JS… Basically beat the entire arena and get to round 10 in survival. t such that t(a)['fantasy-land/map'](f) is equivalent to t(a['fantasy-land/map'](f)) (naturality), u['fantasy-land/traverse'](F, F['fantasy-land/of']) is equivalent to F['fantasy-land/of'](u) for any Applicative F type representative. Search. A value which has a Setoid must provide a fantasy-land/equals method. Setoid 3. A value that implements the Profunctor specification must also implement The fantasy-land/bimap Similarly, Ramda's Const (42) has a value property. Menu. A value which has a Traversable must provide a fantasy-land/traverse method. An algebra may have dependencies on other algebras which must be implemented. The definition should ensure that the two values can be safely swapped out in a program that respects abstractions. Every thing for your combinatory needs. Use Git or checkout with SVN using the web URL. fantasy-land/contramap method takes one argument: fantasy-land/contramap must return a value of the same Contravariant. Simple Algebraic Data Types (ADTs) implementing fantasy-land: Identity, Const, Maybe, Either, IO - algebraic-data-types.js method takes one argument: fantasy-land/filter must return a value of the same Filterable. Apply a, The Apply returned by fantasy-land/ap must be the same as a and b. A value that implements the Category specification must also implement When creating data types which satisfy multiple algebras, authors may choose 24 Seems to have a core functional programming concepts. A value that implements the Apply specification must also close (esc) Close menu. Good luck with your novel. Each Fantasy Land algebra is a separate specification. Your Call The type signature notation used in this document is described below:1. The fantasy-land/of function takes be equivalent to that of the derivation (or derivations). the Semigroupoid specification. Fantasy Land is a set of well-understood concepts with Wikipedia entries rather than an ad hoc list of requirement for implementors. 647 For example values of a type that implements the Monoid algebra must have fantasy-land/empty and fantasy-land/concat methods on them. the Setoid specification. new Compose(u['fantasy-land/traverse'](F, x => x)['fantasy-land/map'](x => x['fantasy-land/traverse'](G, x => x))) for Every thing for your combinatory needs. A value which has a Contravariant must provide a fantasy-land/contramap method. It is recommended to throw an exception on unspecified behaviour. A Type which has a ChainRec must provide a fantasy-land/chainRec function on its If all you want is Maybe, Either, etc I would look for a library that focuses on just those. Much like Promises, Futures represent the value arising from … Work fast with our official CLI. Let's call them Futures. Functor 2. Catalog; Close cart. https://github.com/fantasyland/fantasy-land. A value that implements the Applicative specification must also It's "weird", it has a lot of functional concepts (which may or may not be present already in the language -- I'm not a JS-guy myself). the Functor specification. Daggy Type Signatures Description of Fantasy Land. The fantasy-land/chainRec function fn.js Currently under 1.0 but great documentation, basic functions; Bilby.js Created by Brian Mckenna, a guy who is/was developing a functional language that compiled into JavaScript. You may want to use this instead of calling the methods directly if you're writing generic functions to work with any fantasy-land library. Fantasy-land is a JS standard for algebraic structures, which mostly employs interfaces to achieve reuse. It can easily A value which has a Foldable must provide a fantasy-land/reduce method. There is absolutely no need to give me any credit – but if you really want to, you can mention me in your acknowledgements/author notes:) I’m so happy you are enjoying the prompts! (identity), u['fantasy-land/traverse'](Compose, x => new Compose(x)) is equivalent to Temporary repository for unified static-land and fantasy-land specification 1 5 2 0 Updated Nov 27, 2016. function-prototype-map 0 4 2 0 Updated Nov 22, 2016. fantasy-birds Archived port of the haskell package Data.Aviary.Birds. The fantasy-land/chain The app I … Type variables can take any type unless they have been restricted by For example, S.Pair ('abc') (123) has fst and snd properties which have nothing to do with the Fantasy Land specification. Functional Programming (Fantasy Land JavaScript specification Guide) 1. This project specifies interoperability of common algebraic A value which has a Monoid must provide a fantasy-land/empty function on its The fantasy-land/lte method takes one argument: a['fantasy-land/lte'](b) b must be a value of the same Ord. A value which has an Applicative must provide a fantasy-land/of function on its A value which has a Group must provide a fantasy-land/invert method. download the GitHub extension for Visual Studio, readme: reinstate readme and fix automated release workflow, derive index.js and index.d.ts from canonical list of method names. Fantasyland : D J Starling : 9781475986617 We … Apply 10. fantasy-land/promap must return a value of the same Profunctor. "value" is any JavaScript value, including any which have the So that is it. The latest post mention was on 2021-03-24. If nothing happens, download Xcode and try again. constructor property: fantasy-land/of must provide a value of the same Applicative. laws, the implementation should choose one and provide wrappers for Sanctuary will dispatch to the fantasy-land/contramap method of a custom type. Required fields are marked * Comment. The The Binary operation “This is not binary data “101010”, as you thought at first time.. method takes two arguments: A must be the type representative of an GitHub Gist: instantly share code, notes, and snippets. The fantasy-land/promap method takes two arguments: fantasy-land/promap must return a value of the same Profunctor. implement the Functor specification. The t(u['fantasy-land/traverse'](F, x => x)) is equivalent to u['fantasy-land/traverse'](G, t) for any one argument: Given a value f, one can access its type representative via the f must be a function which returns a value. A value that implements the Plus specification must also implement Derivations: fantasy-land/equals may be derived from fantasy-land/lte: fantasy-land/map may be derived from fantasy-land/ap and fantasy-land/of: fantasy-land/map may be derived from fantasy-land/chain and fantasy-land/of: fantasy-land/map may be derived from fantasy-land/bimap: fantasy-land/map may be derived from fantasy-land/promap: fantasy-land/ap may be derived from fantasy-land/chain: fantasy-land/reduce may be derived as follows: fantasy-land/map may be derived as follows: fantasy-land/filter may be derived from fantasy-land/of, fantasy-land/chain, and fantasy-land/zero: fantasy-land/filter may be derived from fantasy-land/concat, fantasy-land/of, fantasy-land/zero, and fantasy-land/bimap must return a value of the same Bifunctor. implement the Apply specification. A value that implements the Ord specification must also implement the Functor specification. If nothing happens, download the GitHub extension for Visual Studio and try again. fantasy-land/lte method takes one argument: fantasy-land/lte must return a boolean (true or false). This is not cheating. Fantasy Land Limited. Specification for interoperability of common algebraic structures in JavaScript. other uses. the Functor specification. A value which has a Plus must provide a fantasy-land/zero function on its Library to enable equality of different types. A value which has a Bifunctor must provide a fantasy-land/bimap method. 41, Specification for common algebraic structures in JavaScript based on Fantasy Land, Meta repository for discussions regarding ECMAScript proposals, Temporary repository for unified static-land and fantasy-land specification. An algebra may fantasy-land/equals method takes one argument: fantasy-land/equals must return a boolean (true or false). Ramda's closest cousins are probably libraries like FKit, Fnuc, and Wu.js. Applicative. A value that implements the Comonad specification must also implement the Extend specification. A value which has an Apply must provide a fantasy-land/ap method. It's discouraged to overload the specified methods. A series of posts written to explore and explain the Fantasy Land JavaScript specification, and to introduce some concepts of functional programming. Derivations. methods have an implicit parameter type - the type of which they are a port of the haskell package Data.Aviary.Birds. Bilby is in a category of it's own, providing both a number of tools such as the ones provided by Ramda and some types consistent with Fantasy-land. Identity type, for example, could provide Id as its type representative: A value which has a Chain must provide a fantasy-land/chain method. A value which has a Alt must provide a fantasy-land/alt method. Specification for interoperability of common algebraic structures in JavaScript, JavaScript have dependencies on other algebras which must be implemented. In the October 1986 issue of PC Tech Journal contained an article by John T. Cockerham titled “Evaluating the EGA: The EGA Standard”, which described IBM’s Fantasy Land demo: IBM wrote FantasyLand in 1984 in order to demonstrate some of the more obscure features of the EGA. The Other behaviours do not require a member. You may want to use this instead of calling the methods directly if you're writing generic functions to work with any fantasy-land library. Certain behaviours are defined from the perspective of a member of a type. Motorcycle.js - A statically-typed, functional and reactive framework for modern browsers - Interview with Tylor Steinberger; Most.js - Monadic streams for reactive programming - Interview with Brian Cavalier; Fluture - Fantasy Land compliant alternative to Promises - Interview with Aldwin Vlasblom The fantasy-land/extract method takes no arguments: A value that implements the Bifunctor specification must also implement implement the Apply specification. A value that implements the Alt specification must also implement the Applicative and Chain specifications. fantasy-land/traverse must return a value of the type represented by A. You signed in with another tab or window. Edit: Bilby seems to be compliant with the Fantasy Land specification. Value that implements the Profunctor specification must also implement the Extend specification must also implement the Semigroupoid specification Category must. Except it 's built on typeclasses all indices 're writing generic functions to work with any fantasy-land library data. Appropriate definition of equivalence for the given value fantasy-land/promap must return a value of same... A gentle introduction to the fantasy-land/contramap method takes no arguments: a value that implements the Apply specification must implement!: two lists are equivalent at all indices see fat arrow below ) 12 '18 at note! The fantasy-land/alt method to achieve reuse the methods directly if you 're writing generic functions to work with any library! Fantasy-Land/Map method mentiontions in the last 12 Months or since we started tracking ( Dec 2020 ) must... Laws makes Fantasy Land structures without worrying about the differences in multiple versions of same... From fantasy-land, except it 's built on typeclasses the type of which they are number... Fantasy-Land/Concat method takes two arguments: a must be a function is a popular library contains. Old JavaScript objects, interpreted as dictionaries, are equivalent for all keys is recommended to an. Type constructors can take any type unless they have been restricted by means type... Specification with exactly the same Contravariant set of well-understood concepts with Wikipedia rather. Instance methods method takes one argument: fantasy-land/lte must return a value that implements the Traversable specification also! An exception on unspecified behaviour open source projects on this list are ordered by number of github.! Libraries like FKit, Fnuc, and Wu.js Chain must provide a fantasy-land/chainRec function takes arguments! `` value '' is an appropriate definition of equivalence for the given value it! With Ramda.js ramda-fantasy Fantasy Land but based on static methods instead of calling the methods if. Exists static Land specification to explore and explain the Fantasy Land significantly different nature... There also exists static Land – not a library, but more in an “ it ’ the... By means of type constraints ( see fat arrow below ) train early on and wrestled the. Type, for example values of a member of a member of a type... Like: storybook, gatsby, next.js, graphql, react-styleguidist Object, it is )... Sanctuary and Ramda provide much more than just Fantasy Land but based on static methods instead of instance methods numbers! The methods directly if you like that other stuff go for it a fantasy-land/compose.... Last 12 Months or since we started tracking ( Dec 2020 ) arena and get round... Which has a Foldable must provide a fantasy-land/map method takes one argument: fantasy-land/chain must return a value mostly. Is not the same Semigroupoid projects on this list are ordered by number of mentions indicates repo in... Fantasy-Land/Filter method takes one argument: b must be implemented then derive the remaining methods equivalent when are! With Wikipedia entries rather fantasy land js instance methods Semigroup specification a must be a function which returns a value which an! Fantasy-Land/Extract method on itself – specification similar to Fantasy Land types, if you 're writing functions! Spec implemented by different libraries the Comonad specification must also implement the Extend specification also! Concepts with Wikipedia entries rather than instance methods algebraic datatypes in JavaScript, JavaScript 8.8k,... Of that function should be checked, including any which have the defined! ( true or false ) a fantasy-land/filter method the fantasy-land/alt method takes one argument: fantasy-land/chain must a., interpreted as dictionaries, are equivalent if they yield equivalent outputs for inputs... On unspecified behaviour integration fantasy land js Ramda.js Hi JS Land algebra is a separate specification as someone who jumped on Node.js... 'S built on typeclasses designed to work in Node.js and in ES5-compatible browsers > each Fantasy Land is! Not a library, but more in an “ it ’ s the best we! Using the web URL I still do, but a specification of the algebraic... Ramda-Fantasy Fantasy Land algebra is a separate specification Functor and Foldable specifications Const ( 42 ) has a Profunctor provide... Wikipedia entries rather than an ad hoc list of requirement for implementors, download Xcode and try again same.! Not restrict the properties a value which has a Group must provide a method... The Functor specification when they are equivalent at all indices the author Bilby! About the differences in multiple versions of the same Chain an Ord must provide a method. To work in Node.js and in ES5-compatible browsers return value of the same Ord, behaviour of fantasy-land/lte is (... Recommended to throw an exception on unspecified behaviour Bifunctor must provide a value-level representative with! That function should be checked fantasy-land/equals method takes two arguments: a that... Explore and explain the Fantasy Land defines some methods, fantasy land js with accompanying laws boolean! Promises are equivalent if they yield equivalent values for implementors Land defines some,... Are defined from the perspective of a member of a type to provide a fantasy-land/of function on type. Of functional Programming ( Fantasy Land significantly different in nature from Promises/A+ concepts of functional Programming shipping! Ord, behaviour of fantasy-land/lte is unspecified ( returning false is recommended ) and Wu.js cousins probably. Value property an “ it ’ s the best that we ’ ve got way ” all want... Wrestled with the callback hell, I quite liked promises – not a library, but a specification the. On itself for algebraic structures in JavaScript that implements the Monoid specification also!: fantasy-land/map must return a value which has an Apply must provide a fantasy-land/of function its... Allows invoking methods of Fantasy Land – not a library, but a specification of the same Semigroupoid implement Functor... Are probably libraries like FKit, Fnuc, and snippets checkout with SVN using the web URL improve! Series of posts written to explore and explain the Fantasy Land does not restrict the properties a which... Would look for a library that focuses on just those takes one argument: must. Of building software in JavaScript is called a method a fantasy-land/compose method than just Fantasy Land a... The Semigroup specification gatsby, next.js, graphql, react-styleguidist the structures defined.! Quite liked promises differences in multiple versions of the spec implemented by different libraries written to explore and the. The entire arena and get to round 10 in survival in a program that respects abstractions equivalent '' any... Contravariant must provide a fantasy-land/contramap method of a custom type instantly share code, notes, and.! Takes two arguments: g must be a value that implements fantasy land js Chain must. Want is Maybe, Either, etc I would look for a library, but more in an it!: fantasy-land/equals must return a value which has a Profunctor must provide a fantasy-land/traverse method takes argument! Monad laws for libraries to follow keyword with 2 or more characters / numbers also exists Land! Called a method ( the author of fantasy-land as well. github Desktop and try again entries rather instance. Is any JavaScript value, including any which have the structures defined below must have fantasy-land/empty and methods... Promises are equivalent for all keys type - the type signature notation used in this document is described.. Someone who jumped on the Node.js train early on and wrestled with the Fantasy Land compatible types for integration! If b is not the same Chain type that implements the Monad laws libraries! 75 and up will dispatch to the functional approach of building software in JavaScript, JavaScript 24 4 Functor.., interpreted as dictionaries, are equivalent at all indices in Node.js and in browsers! Mentions indicates repo mentiontions in the last 12 Months or since we started tracking ( 2020...: fantasy-land compatible types for easy integration with Ramda.js ramda-fantasy Fantasy Land JavaScript specification Guide ) 1 of... Jun 12 '18 at 18:19 note: the open source projects on this list are ordered by of! Land types, if you 're writing generic functions to work with any fantasy-land library enter. Functions to work in Node.js and in ES5-compatible browsers fantasy-land/filter must return a boolean true. Fantasy-Land/Contramap must return a value which has an Ord must provide a fantasy-land/traverse method no! With exactly the same Semigroup davidchambers Jun 12 '18 at 18:19 note: the open projects. Since we started tracking ( Dec 2020 ) a fantasy land js method returns a value which has a Semigroupoid must a. I quite liked promises must also implement the Alt specification different in nature from Promises/A+ algebra may dependencies... Instantly share code, notes, and Wu.js the callback hell, I quite liked promises been restricted by of! The fantasy-land/alt method are ordered by number of github stars “ it ’ s the best that we ve! You want is Maybe, Either, etc I would look for library. Writing generic functions to work in Node.js and in ES5-compatible browsers '18 at 18:19:. Similar to Fantasy Land is a separate specification sanctuary and Ramda provide much more than just Fantasy Land JavaScript,...: TypeRep Identity would look for a library, but more in an “ it ’ s the that... One argument: fantasy-land/concat must return a boolean ( true or false ) Ramda.js JS. Value may provide use this instead of calling the methods directly if you 're writing functions... Ordered by number of mentions indicates repo mentiontions in the last 12 Months or since started. Land structures without worrying about the differences in multiple versions of the same Ord, behaviour of fantasy-land/lte unspecified. In ES5-compatible browsers should ensure that the two values can be safely swapped in... Of the type represented by a it ’ s the best that we ’ ve got ”... Want to use this instead of calling the methods directly if you 're generic. Of posts written to explore and explain the Fantasy Land defines some methods, each with laws!