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Types are checked at compile-time. Types cannot be ... Every checkout is a branch. Every checkout is a repository. Darcs - interactive. Interactive 'pull' ...
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Higher-Order functions. applyTwice :: (a - a) - a - a. applyTwice f x = f (f x) (a - a) is a function. parentheses are needed. a is (of course) a type parameter ...
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More Input and More Output. Files and Streams. Transforming Input. Not covered. brackets. command-line arguments. bytestrings
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Take. Two base cases (n=0, or empty list) Guard without otherwise will fall through to patterns. take' :: (Num i, Ord i) = i - [a] - [a] take' n _
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Bird R. Introduction to Functional Programming using Haskell. ... HUGS. GHC. ???????????. ?????? ?????????????? ????? ?????????????? ??. ????????? ??????? ?????????? ...
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module MTree ( Tree(Leaf,Branch), fringe ) where. data Tree a = Leaf a | Branch (Tree a) (Tree a) ... fringe left fringe right ...
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Int, Float, Char, Bool, Integer, Rational. Lists and Tuples ... equal to b, the function will then countdown from a to b, outputting all these numbers. ...
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Sound Haskell. Dana N. Xu. University of Cambridge. Joint work with ... Glasgow Haskell Compiler (GHC) gives at run-time. Exception: Prelude.head: empty list ...
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Two reasons: Haskell's type system is very expressive. thanks to ... A new type can be declared by specifying its set of values using a data declaration. ...
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TS: token stream; AST: annotated abstract syntax tree; MI: module information; Programatica ... AST' extract program from token stream. Program. Implementation ...
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Paul Graunke, Shriram Krishnamurthi, Steve Van der Hoeven and Matthias Felleisen. Programming the Web with High-level Programming Languages.
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From Haskell via C
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First order vs Higher order. Higher order: functions are values. Can be passed around ... Monads are higher order ( =) :: Monad m m a (a m b) m b. IO is higher order ...
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Borland C compiler. GNU C compiler. Haskell programming. HUGS interpreter. Glasgow Haskell compiler ... Borland C # bytes in data file. Test E (secs) Test D ...
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HaRe The Haskell Refactorer -- A prototype tool for refactoring Haskell programs ... Refactorings in HaRe: Move Definition. e.g. demote/promote the ...
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Existing Haskell IDEs. Some of these have some Haskell support: syntax colouring ... Language support tends to be unreliable, because these environments are not ...
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El problema de la entrada/salida. Se programa a trav s de funciones matem ticas puras ... (http://www.engr.mun.ca/~theo/Misc/haskell_and_monads.htm) ...
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La programaci n extrema o eXtreme Programming (XP) fue formulada por Kent Beck, ... http://sf.gds.tuwien.ac.at/00-pdf/z/zinc-project/manual-tecnico-1.0.0.pdf ...
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Haskell is one of the worlds most popular functional programming languages. ... Designed to work on the VMs. Reduced features. Mixed compile/interpretive approaches ...
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e.g. f (g x) Using Haskell: The Hugs Interpreter. A linked list. 1. 3. 5. 1 : 3 : 5 : ... Defining Functions. insert :: Ord a = a - [a] - [a] insert x ...
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CS5205: Foundations in Programming Languages FP with Haskell A pure lazy functional language that embodies many innovative ideas in language design.
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Helps instill a desire for elegance in design and implementation ... Partition rest of sequence into two parts. elements pivot value. elements = pivot value ...
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Work done at University of Cambridge. Joint work with. Simon Peyton Jones ... Chalmers University of Technology. 2. Module UserPgm where. f :: [Int] - Int ...
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Typing, saving, printing... Introducing and practicing skills that will be used to publish student writing. ... and master skills. Giving ourselves a ...
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Phone number with optional area code? More examples in the ToeTipper. Expression. Meaning ... lex will run a short bit of code for each matched regular expression. ...
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HaRe: the Haskell Refactorer. Huiqing Li. Claus Reinke. Simon Thompson ... The refactorings in HaRe. Rename. Delete. Lift / Demote. Introduce definition ...
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Current State of the Art. Enforce information flow policies in programming languages! ... Caveats and Disclaimers. Debugging may be more difficult: ...
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Select the correct execution path based on the result of evaluation (i.e. pattern matching) ... Pattern Matching and Continuations ...
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Supongamos que en Haskell no hubiese sobrecarga, y que quisi semos ... importaci n deben aparecer al principio, el resto pueden aparecer en cualquier orden. ...
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The Art of Avoiding Work. Oliver Hunt & Nigel Perry. University of Canterbury, New Zealand ... Prior Art: New Languages. Designed to work on the VMs. Reduced features ...
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Read the text book each week. Make sure you can solve the problems ... Type error messages will be easier to understand. Sometimes they are necessary (as for price) ...
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This graphics library is the work of Matthew Forrest for a third year research project. ... Utilises PDF as its output type to produce rendered vector graphics ...
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Turing Machines, complexity classes, lambda calculus, etc, were ... Pairs of type QV (a, b) can be assembled from two quantum values using a tensor product: ...
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advised by Simon Peyton Jones. Microsoft Research, Cambridge. Module UserPgm where ... Glasgow Haskell Compiler (GHC) gives at run-time. Exception: Prelude.head: ...
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fac :: Int - Int. fac 0 = 1. fac n | n 0 = n * fac(n-1) 11/7/09. FP ... fac m = tfac m b -- renaming m to b or b to m causes name capture. where. tfac o k = k ...
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Want to solve all problems in one framework. Have to ... Affine transformations. Rotation. Translation. Reflection. Scaling. Shear. Composition of the above ...
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All variables and functions start with a lowercase letter ... Prelude :load myFile.hs. Main functionF 1 2. 3. Inside Hugs Interpreter ...
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do let defaults = [clientSize := sz 20 20, border := BorderStatic] ... w - window parent (defaults cboxprops) let cbox = cast w ...
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(2) Definite Bug (definitely crashes) (3) Possible Bug. Crash! Crash! ... Checks each program in a modular fashion on a per function basis. The checking is sound. ...
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True (==) (x:xs) (y:ys) = (x == y) && (xs == ys) (==) xs ys = False ... Works easily for weird data types. data Rose a = MkR a [Rose a] ...
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else head xs `max` 0. No more warnings from compiler! 5. Satisfying a ... e 2 t , e B t is crash-free (related to Blume&McAllester:ICFP'04) Normal form e' ...
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Easier to reason about and manipulate. Lazy. Beta-reduction ... Uniplate (GHC, Yhc, nhc, Hugs H98) Advanced features require Hugs/GHC H' SYB (GHC 6.4 only) ...
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A dozen lazy functional programmers, wanting to agree on a ... Damas-Milner is on a cusp: Can infer most-general types without any type annotations at all ...
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On-Line telephone directories. Pay-roll. etc. Iguana : FP-Group 2002. 4. What's LDAP ? ... every entry from the LDAP directory into an IOArray (mutable array) ...
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by Observing Intermediate Data Structures. Andy Gill. Galois ... Debugging Haskell by Observing Intermediate Data Structures. Debugging any program...
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Rename an identifier. Promote/demote a definition to widen/narrow its scope ... mkLeaf = Leaf. mkNode :: a - (Tree a) - (Tree a) - Tree a. mkNode = Node ...
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Their leader (Lenin) and his comrades rose before a cheering crowd, ... rise, aggression, and human costs of totalitarian regimes (Fascist and Communist) ...
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Wrangler: the Erlang refactorer. Model checking of Erlang programs. Testing of Erlang programs. ... The Erlang Refactorer, Wrangler, is implemented in Erlang. ...
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... has been put to the program analysis part for the implementation of Wrangler. ... Refactoring Erlang programs involves more complex static semantics analysis. ...
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Walther recursion. Size change termination. Does this terminate? fib(1) = 1. fib(2) = 1 ... A function only stops terminating when its given a value. Perhaps ...
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Is: a collection of Haskell data types and functions. 3/23/2001 ... High-level, declarative. Concise code. Executable spec [new!] Time is continuous. 3/23/2001 ...
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Driving concerns: usability and solid basis for extensions. ... Future Directions. Contact Information. The project is funded by EPSRC. ...
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Department of Computer Science and Engineering. Literate Programming ... fact :: Integer - Integer fact 0 = 1 fact n = n * fact (n-1) ...
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Accept the input (number whose factorial is desired) from switches and store it ... answer in R2 register and keep displaying it untill the new number is entered. ...
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DIELECTRIC MEASUREMENTS USING A VECTOR NETWORK ANALYZER FOR GREENLAND AND ANTARCTICA ICE CORE SAMPLES Tyler L. Berry, Fernando Rodriguez-Morales, Stephen Yan,
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