Functional Programming Pure Functional Languages
... where the function application occurs – means that all variables in a function body must be local to that function; why? ...
... where the function application occurs – means that all variables in a function body must be local to that function; why? ...
Functional Programming: Introduction Introduction (Cont.)
... Pure Functional Languages • When all functions are pure, referential transparency and the manifest interface principle are upheld, and thus: – No side-effects, rograms are much easier to formally analyze a) Once we know the local behaviors of functions, we can reason about the system in terms of ind ...
... Pure Functional Languages • When all functions are pure, referential transparency and the manifest interface principle are upheld, and thus: – No side-effects, rograms are much easier to formally analyze a) Once we know the local behaviors of functions, we can reason about the system in terms of ind ...
function - City Tech OpenLab
... • Does one thing. If it does too many things, it should be broken down into multiple functions ...
... • Does one thing. If it does too many things, it should be broken down into multiple functions ...
Lecture 1, Mon 4 Aug 2008, PDF
... signifying addition, subtraction, multiplication and division. As usual, we can also use in front of an expression to negate its value, as in -(x+y). In addition, the function div and mod signify integer division and remainder, respectively. So div 3 2 is 1, div 7 3 is 2, . . . while mod 10 6 is 4, ...
... signifying addition, subtraction, multiplication and division. As usual, we can also use in front of an expression to negate its value, as in -(x+y). In addition, the function div and mod signify integer division and remainder, respectively. So div 3 2 is 1, div 7 3 is 2, . . . while mod 10 6 is 4, ...
The Bridge between Mathematical Models of Physics and Generic
... structure, such as an equivalence relation, ordering, or numerical operations on that type (adhoc polymorphism). The Haskell language adopted type classes, a form of limited usercontrolled overloading, by which a set of functions (in this context: methods) with specified type signatures can be assoc ...
... structure, such as an equivalence relation, ordering, or numerical operations on that type (adhoc polymorphism). The Haskell language adopted type classes, a form of limited usercontrolled overloading, by which a set of functions (in this context: methods) with specified type signatures can be assoc ...
Functions taking functions
... After the filtering is finished, we’re left with the task of getting the names. We need a construct that takes a group of people, and returns their names. Similar to filtering, this construct can’t know in advance what information we want to collect. We might want to get a value of a specific attrib ...
... After the filtering is finished, we’re left with the task of getting the names. We need a construct that takes a group of people, and returns their names. Similar to filtering, this construct can’t know in advance what information we want to collect. We might want to get a value of a specific attrib ...
Introduction to Haskell(1)
... are used to define still more complex ones, and so on. Finally, we define a function to compute the output of the entire program from its inputs. If you can write function definitions, you can write functional programs! ...
... are used to define still more complex ones, and so on. Finally, we define a function to compute the output of the entire program from its inputs. If you can write function definitions, you can write functional programs! ...
slides
... • Both complicate reasoning about program behavior. • However, that doesn’t mean we can do without side effects – Persistence – Dispensing cash – Requesting input – Displaying a page ...
... • Both complicate reasoning about program behavior. • However, that doesn’t mean we can do without side effects – Persistence – Dispensing cash – Requesting input – Displaying a page ...
Practical 10 - OCaml 2 - Computing Science and Mathematics
... Both constructions are possible because :: is right-associative, so nested parens to the right are unnecessary. Also keep in mind that [] is the empty list. It is polymorphic, and so is also used to terminate lists. Thus, the structure containing the above list is ...
... Both constructions are possible because :: is right-associative, so nested parens to the right are unnecessary. Also keep in mind that [] is the empty list. It is polymorphic, and so is also used to terminate lists. Thus, the structure containing the above list is ...
The Fun of Programming - Department of Computer Science, Oxford
... settings, such as generic Java and XML. The time is ripe, therefore, to teach a second course on functional programming, delving deeper into the subject. This book is the text for such a course. The emphasis is on the fun of programming in a modern, well designed programming language such as Haskell ...
... settings, such as generic Java and XML. The time is ripe, therefore, to teach a second course on functional programming, delving deeper into the subject. This book is the text for such a course. The emphasis is on the fun of programming in a modern, well designed programming language such as Haskell ...
FlerizzaSanidad - Lambda Love - Q4
... 1. Why does Haskell use the lambda symbol? Lambda is a calculus which is a formal system in mathematical logic for expressing computation based on function and abstraction and application using variable binding and substitution. Haskell is based on that lambda calculus that is why the founder of Has ...
... 1. Why does Haskell use the lambda symbol? Lambda is a calculus which is a formal system in mathematical logic for expressing computation based on function and abstraction and application using variable binding and substitution. Haskell is based on that lambda calculus that is why the founder of Has ...
Powerpoint ()
... • Scala has this, known as Option • In general, if null is possible, use Option ...
... • Scala has this, known as Option • In general, if null is possible, use Option ...
Type
... A Dynamically Typed language allows the a variable’s type to change during program execution. This can be very convenient but can make debugging more difficult. There can be performance penalties (why?) Examples – Lisp, Scheme, Perl. ...
... A Dynamically Typed language allows the a variable’s type to change during program execution. This can be very convenient but can make debugging more difficult. There can be performance penalties (why?) Examples – Lisp, Scheme, Perl. ...
lisp notes #4
... Requires Abstraction – requires to think using concepts and about what needs to be done and not how it is done Abstract out the control flow patterns and give them names to easily reuse the control pattern » For example in most languages we explicitly write a loop every time we want to process an ar ...
... Requires Abstraction – requires to think using concepts and about what needs to be done and not how it is done Abstract out the control flow patterns and give them names to easily reuse the control pattern » For example in most languages we explicitly write a loop every time we want to process an ar ...
INF 141 Latent Semantic Analysis and Indexing
... def makeTraceable_f_f(f): def traceable_f_f(x,y): h=f(x,y) return h, str(f) + " was called, result=" + str(h) + "\n" return traceable_f_f # Now let’s make one of these! And call it >> aTraceableHypo = makeTraceable_f_f(hypotenuse) >> aTraceableHypo(3,4) (5.0, ' was ...
... def makeTraceable_f_f(f): def traceable_f_f(x,y): h=f(x,y) return h, str(f) + " was called, result=" + str(h) + "\n" return traceable_f_f # Now let’s make one of these! And call it >> aTraceableHypo = makeTraceable_f_f(hypotenuse) >> aTraceableHypo(3,4) (5.0, '
Programming Languages
... transparency of functional programming make the semantics of functional programs particularly straightforward: there is no state. • Indeed, the lack of local state in functional programming makes it in a sense the opposite of object-oriented programming, where computation proceeds by changing the lo ...
... transparency of functional programming make the semantics of functional programs particularly straightforward: there is no state. • Indeed, the lack of local state in functional programming makes it in a sense the opposite of object-oriented programming, where computation proceeds by changing the lo ...
Slides
... A monad is an abstract datatype It abstracts computations with effects. It hides the details of its implementation. It exports an abstract interface. It specifies the order in which effects ...
... A monad is an abstract datatype It abstracts computations with effects. It hides the details of its implementation. It exports an abstract interface. It specifies the order in which effects ...
A Functional Approach to the Observer Pattern
... If we forget about the getSubject method, which is a common use of the pattern, we can give alternative implementations taking arrows [5] or applicative functors [4] as the effectful world. ...
... If we forget about the getSubject method, which is a common use of the pattern, we can give alternative implementations taking arrows [5] or applicative functors [4] as the effectful world. ...
Type Systems
... untyped arithmetic expressions the untyped lambda calculus nameless representation of terms ...
... untyped arithmetic expressions the untyped lambda calculus nameless representation of terms ...
An Introduction to F# – Sushant Bhatia
... A function is a rule that associates to each x from some set X of values, a unique y from another set Y of values. If f is the name of the function, y=f(x) f:X→Y ...
... A function is a rule that associates to each x from some set X of values, a unique y from another set Y of values. If f is the name of the function, y=f(x) f:X→Y ...