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# Topic: Currying

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 PlanetMath: currying Currying is the technique of emulating multiple-parametered functions with higher-order functions. The term currying is derived from the name of Haskell Curry, a 20th century logician. This is version 3 of currying, born on 2002-03-29, modified 2004-05-25. planetmath.org /encyclopedia/Currying.html   (146 words)

 [Python-Dev] PEP 309, function currying Currying is a way of transforming a function so that instead of accepting all its arguments at once it accepts just the first, returning a function which accepts just the second, returning a function which accepts just the third, and so on. Then currying is the function transformer C such that - when f is a function of no arguments, C(f) = f(); - when f is a function of at least one argument, C(f) is the 1-argument function taking y1 to C(f[y1]). Note that currying a no-argument function yields not a function but a constant; currying a 1-argument function yields the same function; currying any function with at least one argument yields a function that takes exactly one argument. mail.python.org /pipermail/python-dev/2004-February/042683.html   (452 words)

 Ajax Cookbook - Currying JavaScript Functions Currying a function is the act of transforming a function that takes n arguments into a function that takes n - 1 arguments. Essentially, currying is the act of binding the first argument of a function to a specific value, creating a new function that takes the remaining arguments. While this may seem useless initially, currying is very useful in the context of Ajax callbacks. ajaxcookbook.org /currying-javascript-functions   (441 words)

 Function Currying in Scheme   (Site not responding. Last check: 2007-10-18) Curried functions are delayed functions expecting the remainder of the arguments to be supplied. When the curried function is evaluated with arguments, a complete argument list is created from both the original partial argument list and the new completing argument list (using append), and the original function is evaluated with the new argument list (using apply). However, the use of curried functions is not something to which one becomes quickly accustomed, so its initial benefit is difficult to gauge by the casual Scheme user. www.engr.uconn.edu /~jeffm/Papers/curry.html   (1069 words)

 Currying - Wikipedia, the free encyclopedia   (Site not responding. Last check: 2007-10-18) In computer science, currying is the technique of transforming a function taking multiple argume OCaml programming language nts into a function that takes a single argument (the first of the arguments to the original function) and returns a new function that takes the remainder of the arguments and returns the result. The practical motivation for currying is that very often the functions you get by supplying some but not all of the arguments to a curried function are useful; for example, many languages have a function or operator similar to plus_one. When viewed in a set-theoretic light, currying becomes the theorem that the set of functions from to A, and the set (AB)C of functions from C to the set of functions from B to A, are isomorphic. www.seas.upenn.edu /~cse121/hws/webcrawler_project/html_pages/3/Currying.html   (456 words)

 Currying - Wikipedia, the free encyclopedia In computer science, currying is the technique of transforming a function taking multiple arguments into a function that takes a single argument (the first of the arguments to the original function) and returns a new function that takes the remainder of the arguments and returns the result. In theoretical computer science, currying provides a way to study functions with multiple arguments in very simple theoretical models such as the lambda calculus in which functions only take a single argument. The practical motivation for currying is that very often the functions you get by supplying some but not all of the arguments to a curried function are useful; for example, many languages have a function or operator similar to www.cs.rice.edu /~taha/teaching/05F/210/news/2005_10_26.htm   (411 words)

 svendtofte.com - Curried JavaScript functions Currying is a useful technique, with which you can partially evaluate functions. If you give a curried function, less arguments, then it expects, it will give you back, a function, which has been fed the arguments you gave it, and will accept the remaining ones. Which is one of the reasons I choose this language, to showcase the principle of currying. www.svendtofte.com /code/curried_javascript   (2865 words)

 The 2006-2011 World Outlook for Tanning, Currying, and Finishing Hides and Skins; The latent demand for tanning, currying, and finishing hides and skins; having others process hides and skins on a contract basis; and dyeing or dressing furs is not actual or historic sales. It is for this definition of tanning, currying, and finishing hides and skins; having others process hides and skins on a contract basis; and dyeing or dressing furs that the aggregate latent demand estimates are derived. Based on the aggregate view of tanning, currying, and finishing hides and skins; having others process hides and skins on a contract basis; and dyeing or dressing furs as defined above, data were then collected for as many similar countries as possible for that same definition, at the same level of the value chain. www.mindbranch.com /Outlook-Tanning-Currying-R307-12298   (3516 words)

 Soccer Dad: Currying favor Wayne Curry, former Prince George's County Executive and a number of other notable fl Democrats have thrown their support behind Lieutenant Governor Michael Steele's bid for the senate. Curry and the lawmakers said Democratic leaders repeatedly have snubbed the fl community and their county, noting the lack of party support for the Senate campaign of former National Association for the Advancement of Colored People chief Kweisi Mfume, who lost the Democratic primary to Rep. Benjamin L. Cardin. It's important to add that Curry's support may really have less to do with the marginalization of African American politicians than it does with the Ehrlich-Steele PG County strategy. soccerdad.baltiblogs.com /archives/2006/10/31/currying_favor.html   (1122 words)

 LtU Classic Archives Currying really helps with stating theorems and writing high order code, and allows you to write code similar to J's tacit definitions. I doubt there has been any work on Haskell's currying syntax, though I have a faint memory that Paul Hudak (and others) once wrote a rationale for Haskell, so maybe there is a note on it in there. Haskell's syntax for currying, I would guess, was adopted from Curry and Schoenfinkel's syntax for combinatory logic, in which there are no variables as such. lambda-the-ultimate.org /classic/message4670.html   (693 words)

 ASPN : Python Cookbook : curry -- associating parameters with a function   (Site not responding. Last check: 2007-10-18) A typical use of curry is to construct callback functions for This curries positional arguments from the right, and gives named arguments specified at call-time precedence over those specified at currying-time, but these policies are clearly easy to alter:-). Currying transforms a function taking a single tuple argument into a function taking multiple arguments, and uncurrying reverses the process. aspn.activestate.com /ASPN/Cookbook/Python/Recipe/52549   (980 words)

 currying : Java Glossary Currying is the incomplete application of arguments to a function. To curry a function, one needs only to leave off one or more of the rightmost arguments. The inclusion of parentheses is important because it distinguishes the application of one argument to a curried function from the application of two arguments to a non-curried function. mindprod.com /jgloss/currying.html   (280 words)

 Currying f(l)avour - Deccan Herald   (Site not responding. Last check: 2007-10-18) It used to be a family joke that currying favour with our grandmother was easy if you gave her curry-leaf powder or chutney. A paste of fresh curry leaves boiled in milk was used by ayurvedic practitioners to combat the poisonous bites of animals and insects. Curry leaves (tree's scientific name: Murraya Koenigi) are called kaidarya or krishnanimba in Sanskrit, karipatta in Hindu, karibevu in Kannada, karivepaaku in Telugu and karivepillai in Tamil. www.deccanherald.com /deccanherald/aug132004/liv9.asp   (669 words)

 CSc 520 Principles of Programming Languages : Currying is the preferred way of constructing multi-argument functions. Currying is named after logician Haskell B. Curry (1900-1982) who popularized it. Curried functions are reusable because they can be specialized; i.e. www.cs.arizona.edu /people/collberg/Teaching/520/2005/Html/Html-15/index.html   (661 words)

 Sriram Krishnan : Functional Programming in C# - Currying Instead of explaining currying again, let me point to a blog post I made in an earlier life where I talked about implementing this in Python. Currying is the process of converting a n-argument function f into a single-argument which takes a parameter p1, and returns a single-argument function which takes a parameter p2, and... 'curry' but that was rejected since what it does isn't currying. blogs.msdn.com /sriram/archive/2005/08/07/448722.aspx   (1997 words)

 Currying flavour - Epicure - theage.com.au It's a claim bound to start a heated (pun intended) argument because the word "curry" isn't really used in India, or not in the same sense as in the West. In India, the ingredients of curry vary according to the cook, region and custom, but your standard spice mixture would include cumin, turmeric, nutmeg, ginger, cardamom, cloves and pepper. A good tip I've learnt is if you're cooking for a group, just split the curry in two, keeping one half mild and the other spicy. www.theage.com.au /articles/2003/08/19/1061261127970.html   (739 words)

 The idea of currying   (Site not responding. Last check: 2007-10-18) Currying can be seen as a way of generating intermediate functions which accept additional parameters to complete a calculation Currying and Scheme is not related to each other. Currying must be integrated at a more basic level to be elegant and useful www.cs.auc.dk /~normark/prog3-03/html/notes/higher-order-fu-show-currying-1.html   (55 words)

 Scraps from a Messy Desk : Weblog There've always been functors that allowed you to bind constant arguments of an existing functor, and the result of the binding are new functors that use the bound values and accept the remaining arguments. I was particularly struck by their example late in the article pertaining to using closures and currying to define business rules. If anything, currying is the limited form, since (as it appears from the uses that I've observed) you always curry a function by giving the leading subset of the arguments, where STL binding allows you to bind any of the arguments at any time. jroller.com /page/dhall?entry=closures_currying_and_the_naming   (886 words)

 Propagánda A core feature of a purely functional language is that all "variables" are immutable/final, that state is stored on the stack and can be managed via higher order functions and currying. Currying is the realisation of function parameters independently of function execution. This sounds very like the OO abstraction of properties and instance methods to me. Many of the benefits of FP listed in the article (improved robustness, unit testing, concurrency) flow from the immutable nature of variables (or symbols) in pure FP languages. jroller.com /page/ie?entry=higher_order_functions_currying_and   (245 words)

 Currying - Wikipedia, the free encyclopedia For example, if function div stands for the curried form of the division operation /, then div(1) is another function: the same as the function inv that returns the multiplicative inverse of its argument, defined by inv(y) = 1 / y. Some programming languages have built-in syntactic support for currying, where certain multi-argument functions are expanded to their curried form; notable examples are ML and Haskell. Currying may be achieved in C++ using the Standard Template Library function object adapters ( en.wikipedia.org /wiki/Currying   (1055 words)

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