Introduction to Racket
... quote quotes its argument without evaluating it. (quote (map + 0 "cool")) is simply a list of four elements. (quote map) creates a symbol 'map that has nothing to do with the identifier map (except the name). One can directly write ' instead of quote. quote has no effect on literals (numbers, string ...
... quote quotes its argument without evaluating it. (quote (map + 0 "cool")) is simply a list of four elements. (quote map) creates a symbol 'map that has nothing to do with the identifier map (except the name). One can directly write ' instead of quote. quote has no effect on literals (numbers, string ...
3. Functional Programming
... polymorphic, i.e., can take arguments of different types. In addition, Haskell supports (ML-style) type inference: (most) programs can be type-checked even without explicit type annotations. User-defined algebraic datatypes are abstract data types that bundle functions together with a hidden represe ...
... polymorphic, i.e., can take arguments of different types. In addition, Haskell supports (ML-style) type inference: (most) programs can be type-checked even without explicit type annotations. User-defined algebraic datatypes are abstract data types that bundle functions together with a hidden represe ...
Functional Programming
... • Functional programming defines the outputs of a program as mathematical function of the inputs with no notion of internal state (no side effects ) • A pure function can always be counted on to return the same results for the same input parameters • No assignments: dangling and/or uninitialized poi ...
... • Functional programming defines the outputs of a program as mathematical function of the inputs with no notion of internal state (no side effects ) • A pure function can always be counted on to return the same results for the same input parameters • No assignments: dangling and/or uninitialized poi ...
Lambda Calculus and Functional Programming
... themselves, allowing an operation to be performed over and over. Recursion may require maintaining a stack, but tail recursion can be recognized and optimized by a compiler into the same code used to implement iteration in imperative languages. The Scheme programming language standard requires imple ...
... themselves, allowing an operation to be performed over and over. Recursion may require maintaining a stack, but tail recursion can be recognized and optimized by a compiler into the same code used to implement iteration in imperative languages. The Scheme programming language standard requires imple ...
Functional Programming www.AssignmentPoint.com In computer
... languages. The Scheme language standard requires implementations to recognize and optimize tail recursion. Tail recursion optimization can be implemented by transforming the program into continuation passing style during compiling, among other approaches. ...
... languages. The Scheme language standard requires implementations to recognize and optimize tail recursion. Tail recursion optimization can be implemented by transforming the program into continuation passing style during compiling, among other approaches. ...
Annotated_Chapter_4_slides
... The symbol is the Greek letter lambda, and is typed at the keyboard as a backslash \. In mathematics, nameless functions are usually denoted using the symbol, as in x x+x. In Haskell, the use of the symbol for nameless functions comes from the lambda calculus, the theory of functions o ...
... The symbol is the Greek letter lambda, and is typed at the keyboard as a backslash \. In mathematics, nameless functions are usually denoted using the symbol, as in x x+x. In Haskell, the use of the symbol for nameless functions comes from the lambda calculus, the theory of functions o ...
List
... Simple but provides the core constructs Functions as first class objects Lexical scoping – Earlier LISPs did not do that (dynamic) ...
... Simple but provides the core constructs Functions as first class objects Lexical scoping – Earlier LISPs did not do that (dynamic) ...
conditional expressions
... The symbol is the Greek letter lambda, and is typed at the keyboard as a backslash \. In mathematics, nameless functions are usually denoted using the symbol, as in x x+x. In Haskell, the use of the symbol for nameless functions comes from the lambda calculus, the theory of functions o ...
... The symbol is the Greek letter lambda, and is typed at the keyboard as a backslash \. In mathematics, nameless functions are usually denoted using the symbol, as in x x+x. In Haskell, the use of the symbol for nameless functions comes from the lambda calculus, the theory of functions o ...
conditional expressions
... x:xs patterns must be parenthesized, because application has priority over (:). For example, the following definition gives an error: head x:_ = x Hugs> hd [1, 2, 3] where hd x:_ = x ERROR - Syntax error in declaration (unexpected symbol ":") Hugs> hd [1, 2, 3] where hd (x:_) = x ...
... x:xs patterns must be parenthesized, because application has priority over (:). For example, the following definition gives an error: head x:_ = x Hugs> hd [1, 2, 3] where hd x:_ = x ERROR - Syntax error in declaration (unexpected symbol ":") Hugs> hd [1, 2, 3] where hd (x:_) = x ...
Y in Practical Programs Extended Abstract
... For typical working programmers, the Y combinator for finding the fixed point of higher order functions is seen, at best, as an idiosyncratic example of the features of functional programming languages or, worse, not understood at all. We are going to see that it is actually useful in programming de ...
... For typical working programmers, the Y combinator for finding the fixed point of higher order functions is seen, at best, as an idiosyncratic example of the features of functional programming languages or, worse, not understood at all. We are going to see that it is actually useful in programming de ...
Haskell Summary Functions • A function takes 1 or more parameter
... This convention also allows one of the operands of the operator to be included in the parentheses. For example: (1/) - reciprocation function (1+) 2 and (+2) 1 produce the same result. (*2) - doubling function In general, if ⊕ is an operator, then functions of the form (⊕), (x⊕) and (⊕y) are called ...
... This convention also allows one of the operands of the operator to be included in the parentheses. For example: (1/) - reciprocation function (1+) 2 and (+2) 1 produce the same result. (*2) - doubling function In general, if ⊕ is an operator, then functions of the form (⊕), (x⊕) and (⊕y) are called ...
PLD VII Haddad
... Function definitions, function applications, and data all have the same form: If the list (A B C) is interpreted as data, it is a simple list of three atoms,, A,, B,, and C but if interpreted ...
... Function definitions, function applications, and data all have the same form: If the list (A B C) is interpreted as data, it is a simple list of three atoms,, A,, B,, and C but if interpreted ...
Scheme: More function examples, higher
... • Parameter: a nested list of numbers. • Result: the sum of all the numbers in the parameter. >(define (sum-list-nested ls) (cond ((null? ls) 0) ((list? (car ls)) (+ (sum-list-nested (car ls)) (sum-list-nested (cdr ls)))) (else (+ (car ls) (sum-list-nested (cdr ls)))))) ...
... • Parameter: a nested list of numbers. • Result: the sum of all the numbers in the parameter. >(define (sum-list-nested ls) (cond ((null? ls) 0) ((list? (car ls)) (+ (sum-list-nested (car ls)) (sum-list-nested (cdr ls)))) (else (+ (car ls) (sum-list-nested (cdr ls)))))) ...
Chapter 15 - Department of Computer Science University of Miami
... • Different from ML (and most other functional languages) in that it is purely functional (e.g., no variables, no assignment statements, and no side effects of any kind) Syntax differences from ML (no reserved word for functions, ...
... • Different from ML (and most other functional languages) in that it is purely functional (e.g., no variables, no assignment statements, and no side effects of any kind) Syntax differences from ML (no reserved word for functions, ...
4.1 Characteristics of Functional Programming Languages Chapter
... keep track of the number of times a loop has been executed. In fact, a state is created by the execution of a functional program, but this state is implicit. Rather than storing values in programmer named variables, computations are stored in memory implicitly allocated during the program execution. ...
... keep track of the number of times a loop has been executed. In fact, a state is created by the execution of a functional program, but this state is implicit. Rather than storing values in programmer named variables, computations are stored in memory implicitly allocated during the program execution. ...
Lecture Slides
... An international committee of researchers initiates the development of Haskell, a standard lazy functional language. Partially in response to “Can programming be liberated from the Von Neuman style?”, by John Backus. (Named in honor of logician Haskell B. Curry.) ...
... An international committee of researchers initiates the development of Haskell, a standard lazy functional language. Partially in response to “Can programming be liberated from the Von Neuman style?”, by John Backus. (Named in honor of logician Haskell B. Curry.) ...
Functional programming
... Pro: promotes building more complex functions from other functions that serve as building blocks (component reuse) Pro: behavior of functions defined by the values of input arguments ...
... Pro: promotes building more complex functions from other functions that serve as building blocks (component reuse) Pro: behavior of functions defined by the values of input arguments ...
doc
... in particular Haskell, to demonstrate their ability to replace mainstream languages like C++ in prototyping. They use the review of the programs and development metrics done by a committee chosen by the Navy to show how Haskell outperformed the other languages involved and to identify reasons why it ...
... in particular Haskell, to demonstrate their ability to replace mainstream languages like C++ in prototyping. They use the review of the programs and development metrics done by a committee chosen by the Navy to show how Haskell outperformed the other languages involved and to identify reasons why it ...
CSE 341 - Unit 4
... [00:03:37.02] And they have to raise the same exceptions. We can't have one of them choose to raise an exception in a situation where the other one doesn't. And I may have even forgotten things here, but I think this is a pretty good list, all right. [00:03:48.56] Now, notice it's going to be easier ...
... [00:03:37.02] And they have to raise the same exceptions. We can't have one of them choose to raise an exception in a situation where the other one doesn't. And I may have even forgotten things here, but I think this is a pretty good list, all right. [00:03:48.56] Now, notice it's going to be easier ...
Lecture Notes
... All type errors are found at compile time, which makes programs safer and faster by removing the need for type checks at run time. In GHCi, the :type command calculates the type of an expression, without evaluating it: ...
... All type errors are found at compile time, which makes programs safer and faster by removing the need for type checks at run time. In GHCi, the :type command calculates the type of an expression, without evaluating it: ...
PowerPoint - School of Computing Science
... Do we have a Better Functional Language? We have functions, e.g. x.x+2 is a function, but can we really do functional programming? It’s essential to be able to define recursive functions, but our language has no direct support for recursive definitions. We have no way of associating a name with a ...
... Do we have a Better Functional Language? We have functions, e.g. x.x+2 is a function, but can we really do functional programming? It’s essential to be able to define recursive functions, but our language has no direct support for recursive definitions. We have no way of associating a name with a ...
Chapter 14a - McGraw Hill Higher Education
... Eager evaluation = evaluating arguments at the beginning of the call. – Advantage: efficiency Copyright © 2006 The McGraw-Hill Companies, Inc. ...
... Eager evaluation = evaluating arguments at the beginning of the call. – Advantage: efficiency Copyright © 2006 The McGraw-Hill Companies, Inc. ...
Chapter 11 slides
... constructive proofs, but at a more abstract level: – the logic programmer writes a set of axioms that allow the computer to discover a constructive proof for each particular set of inputs ...
... constructive proofs, but at a more abstract level: – the logic programmer writes a set of axioms that allow the computer to discover a constructive proof for each particular set of inputs ...
Haskell - CIS @ UPenn
... read: where x is in
... read:
-
x <- list is called a generator
This is the list of squares of positive integers
...