
functional form
... A list comprehension is a syntactic construct available in some programming languages for creating a list based on existing lists. It follows the form of the mathematical set-builder notation (set comprehension) as distinct from the use of map and filter functions. ...
... A list comprehension is a syntactic construct available in some programming languages for creating a list based on existing lists. It follows the form of the mathematical set-builder notation (set comprehension) as distinct from the use of map and filter functions. ...
Functions, recursion and lists
... Can it be used to implement arbitrary graphs? (can we build cycles in lists?) ...
... Can it be used to implement arbitrary graphs? (can we build cycles in lists?) ...
Functional Programming Basics
... • Parallel evaluation of sub-expressions possible with referential transparency. cs776 (Prasad) ...
... • Parallel evaluation of sub-expressions possible with referential transparency. cs776 (Prasad) ...
Display version
... With side effects, we have to violate the one-expression-per-function rule. (void) Is a special construct in Scheme that returns nothing . This is actually what gets returned by things like (newline). (begin exp1 exp2 ...) This evaluates all the given expressions, sequentially, and only returns the ...
... With side effects, we have to violate the one-expression-per-function rule. (void) Is a special construct in Scheme that returns nothing . This is actually what gets returned by things like (newline). (begin exp1 exp2 ...) This evaluates all the given expressions, sequentially, and only returns the ...
LN10
... Function type 18.1 The function type a->b (“Haskell is strongly typed” – PDG’s notes, p.7) Objects of type a->b are constructed by lambda abstraction \x->e and used in function application f e’. Lambda abstraction: if e has type b and x is a variable of type a then \x->e has type a->b Function appl ...
... Function type 18.1 The function type a->b (“Haskell is strongly typed” – PDG’s notes, p.7) Objects of type a->b are constructed by lambda abstraction \x->e and used in function application f e’. Lambda abstraction: if e has type b and x is a variable of type a then \x->e has type a->b Function appl ...
Chapter 7 Recursion
... The two legal operations in the -calculus are to construct a function of one argument with a specified body, and to invoke one of these functions on an argument. What can be in the body of the function? Any legal expression, but expressions are limited to variables, function constructions, and func ...
... The two legal operations in the -calculus are to construct a function of one argument with a specified body, and to invoke one of these functions on an argument. What can be in the body of the function? Any legal expression, but expressions are limited to variables, function constructions, and func ...
Programming Least Squares Final
... meaning, and it can be hard to read if you are not accustomed to functional programming. In our first example, “filter(is_even, q)” was fairly easy to understand (fortunately, we chose a descriptive function name), while “filter(lambda x : x % 2 == 0, q)” takes a little longer to comprehend. If you ...
... meaning, and it can be hard to read if you are not accustomed to functional programming. In our first example, “filter(is_even, q)” was fairly easy to understand (fortunately, we chose a descriptive function name), while “filter(lambda x : x % 2 == 0, q)” takes a little longer to comprehend. If you ...
PLD VII Haddad
... i l semantics i – Simple syntax – Inefficient execution – Programs can automatically be made concurrent ...
... i l semantics i – Simple syntax – Inefficient execution – Programs can automatically be made concurrent ...
Chapter 11 slides
... – constructive proof (one that shows how to obtain a mathematical object with some desired property) – nonconstructive proof (one that merely shows that such an object must exist, e.g., by contradiction) ...
... – constructive proof (one that shows how to obtain a mathematical object with some desired property) – nonconstructive proof (one that merely shows that such an object must exist, e.g., by contradiction) ...
curry
... two arguments of types a and b and returns a value of type c like this: – g :: (a, b) -> c • We can let f be the curried form of g by – f = curry g • The function f now has the signature – f :: a -> b -> c • f takes an arg of type a & returns a function that takes an arg of type b & returns a value ...
... two arguments of types a and b and returns a value of type c like this: – g :: (a, b) -> c • We can let f be the curried form of g by – f = curry g • The function f now has the signature – f :: a -> b -> c • f takes an arg of type a & returns a function that takes an arg of type b & returns a value ...
Foundations of Programming Languages Seyed H. Roosta
... functions are powerful enough to do this. ...
... functions are powerful enough to do this. ...
Functional programming
... Polymorphism: the ability to write functions that operate on more than one type of data Aggregate constructs for constructing structured objects: the ability to specify a structured object in-line such as a complete list or record value ...
... Polymorphism: the ability to write functions that operate on more than one type of data Aggregate constructs for constructing structured objects: the ability to specify a structured object in-line such as a complete list or record value ...
Higher-order functions
... In a function call such as f(e), one may evaluate the argument expression e eagerly, to obtain a value v before evaluating the function body. That is what we are used to in Java, C#, F# and languages in the ML family. Alternatively, one might evaluate e lazily, that is, postpone evaluation of e unti ...
... In a function call such as f(e), one may evaluate the argument expression e eagerly, to obtain a value v before evaluating the function body. That is what we are used to in Java, C#, F# and languages in the ML family. Alternatively, one might evaluate e lazily, that is, postpone evaluation of e unti ...
Scheme and functional programming
... First class citizens in a PL • Something is a first class object in a language if it can be manipulated in “any” way”: (example ints and chars) – passed as a parameter – returned from a subroutine – assigned into a variable ...
... First class citizens in a PL • Something is a first class object in a language if it can be manipulated in “any” way”: (example ints and chars) – passed as a parameter – returned from a subroutine – assigned into a variable ...
ppt
... ((f.g.x.(f (g x)) x.(s x)) x.(i x)) (g.x.(x.(s x) (g x)) x.(i x)) x.(x.(s x) (x.(i x) x)) x.(x.(s x) (i x)) x.(s (i x)) ...
... ((f.g.x.(f (g x)) x.(s x)) x.(i x)) (g.x.(x.(s x) (g x)) x.(i x)) x.(x.(s x) (x.(i x) x)) x.(x.(s x) (i x)) x.(s (i x)) ...
Lambda Calculus
... Denition 2 says that a variable is free in a λ-expression if it is free in one of it's sub-expressions. In this case it is important to know that the same variable name can occure bound in one λexpression and free in the other λ-expression. This is because the variable x in one λ-expression is not ...
... Denition 2 says that a variable is free in a λ-expression if it is free in one of it's sub-expressions. In this case it is important to know that the same variable name can occure bound in one λexpression and free in the other λ-expression. This is because the variable x in one λ-expression is not ...
4.1 Characteristics of Functional Programming Languages Chapter
... Entities in a program that can be treated this way are called first-class values or first-class objects. Note that the term object in this definition does not necessarily imply an object in an object-oriented language. Although most imperative languages do not contain first class functions, they pr ...
... Entities in a program that can be treated this way are called first-class values or first-class objects. Note that the term object in this definition does not necessarily imply an object in an object-oriented language. Although most imperative languages do not contain first class functions, they pr ...