Pattern matching in concatenative programming languages
... The idea of pattern matching is that, to see the contents of an object, the same syntax can be used as in creating the object, only on the left hand side of a binding rather than the right. This makes it very easy to write declarative code which manipulates functional data structures. In many functi ...
... The idea of pattern matching is that, to see the contents of an object, the same syntax can be used as in creating the object, only on the left hand side of a binding rather than the right. This makes it very easy to write declarative code which manipulates functional data structures. In many functi ...
Lisp and Scheme I
... • A predicate (in any computer language) is a function that returns either “true” or “false” • In Lisp, –“false” is represented by #f –“true” is represented by anything that isn’t #t • Hence, a Lisp predicate returns either #f or something else –Predicates often return “true” values other than #t, e ...
... • A predicate (in any computer language) is a function that returns either “true” or “false” • In Lisp, –“false” is represented by #f –“true” is represented by anything that isn’t #t • Hence, a Lisp predicate returns either #f or something else –Predicates often return “true” values other than #t, e ...
pl10ch15 - ODU Computer Science
... Primarily Imperative Languages (continued) • Python supports the higher-order functions filter and map (often use lambda expressions as their first parameters) ...
... Primarily Imperative Languages (continued) • Python supports the higher-order functions filter and map (often use lambda expressions as their first parameters) ...
LISP
... manipulated by object programs. This has prevented the separation between system programmers and application programmers. Everyone can “improve” his LISP, and many of these improvements have developed into “improvements” to the language. 11. The conditional expression interpretation of Boolean conne ...
... manipulated by object programs. This has prevented the separation between system programmers and application programmers. Everyone can “improve” his LISP, and many of these improvements have developed into “improvements” to the language. 11. The conditional expression interpretation of Boolean conne ...
Stack Implementations
... throw new EmptyStackException(); //top is at the end of the array //recall: remove returns the object removed return theData.remove(theData.size()-1); ...
... throw new EmptyStackException(); //top is at the end of the array //recall: remove returns the object removed return theData.remove(theData.size()-1); ...
Functional Programming
... • Referential transparency: a function’s result depends only upon the values of its arguments and not on any previous computation or the order of evaluation for its arguments. • This is in contrast to the view of functions in imperative languages, where function values are based on arguments, order ...
... • Referential transparency: a function’s result depends only upon the values of its arguments and not on any previous computation or the order of evaluation for its arguments. • This is in contrast to the view of functions in imperative languages, where function values are based on arguments, order ...
Programming Languages and Compilers (CS 421)
... - The evaluation process for DEFINE is different! The first parameter is never evaluated. The second parameter is evaluated and bound to the first parameter. ...
... - The evaluation process for DEFINE is different! The first parameter is never evaluated. The second parameter is evaluated and bound to the first parameter. ...
Functional Programming
... First-class function values: the ability of functions to return newly constructed functions Higher-order functions: functions that take other functions as input parameters or return functions Polymorphism: the ability to write functions that operate on more than one type of data Aggregate constructs ...
... First-class function values: the ability of functions to return newly constructed functions Higher-order functions: functions that take other functions as input parameters or return functions Polymorphism: the ability to write functions that operate on more than one type of data Aggregate constructs ...
Recursion
... Recursion is a math and programming tool Technically, not necessary Wasn’t available in early programming languages ...
... Recursion is a math and programming tool Technically, not necessary Wasn’t available in early programming languages ...
scheme1
... • Lisp is an old language with many variants – Fortran is the only older language still in wide use – Lisp is alive and well today • Most modern versions are based on Common Lisp • Scheme is one of the major variants – We will use Scheme, not Lisp, in this class – Scheme is used for CS 101 in quite ...
... • Lisp is an old language with many variants – Fortran is the only older language still in wide use – Lisp is alive and well today • Most modern versions are based on Common Lisp • Scheme is one of the major variants – We will use Scheme, not Lisp, in this class – Scheme is used for CS 101 in quite ...
Chapter 11 - Functional Programming, Part I: Concepts and Scheme
... Functions can be used in F.P. like objects in OO: local functions are allowed, functions can be passed to other functions and returned as values, and functions can be created dynamically (functions are first-class values). Chapter 11 - Part I ...
... Functions can be used in F.P. like objects in OO: local functions are allowed, functions can be passed to other functions and returned as values, and functions can be created dynamically (functions are first-class values). Chapter 11 - Part I ...
scheme1
... (e.g., number, symbol) or a list of atoms or sublists • Functional Programming Style – computation done by applying functions to arguments, functions are first class objects, minimal use of side-effects • Uniform Representation of Data and Code – (A B C D) can be interpreted as data (i.e., a list of ...
... (e.g., number, symbol) or a list of atoms or sublists • Functional Programming Style – computation done by applying functions to arguments, functions are first class objects, minimal use of side-effects • Uniform Representation of Data and Code – (A B C D) can be interpreted as data (i.e., a list of ...
ppt
... (list exph expt) a list obtained by inserting the value of exph as first element to the value of expt (head exp) first element of the list exp (tail exp) a list obatined by removing the first element (ifa cexp texp fexp) when cexp evaluates to a number, ...
... (list exph expt) a list obtained by inserting the value of exph as first element to the value of expt (head exp) first element of the list exp (tail exp) a list obatined by removing the first element (ifa cexp texp fexp) when cexp evaluates to a number, ...
Scheme: More function examples, higher
... • Note that fib-help's parameter n keeps track of which Fibonacci number is currently being computed, and parameter last keeps track of which Fibonacci number that we ultimately want. f1 is the previous Fibonacci number, and f2 is the Fibonacci number that comes before f1. ...
... • Note that fib-help's parameter n keeps track of which Fibonacci number is currently being computed, and parameter last keeps track of which Fibonacci number that we ultimately want. f1 is the previous Fibonacci number, and f2 is the Fibonacci number that comes before f1. ...
Comp 205: Comparative Programming Languages
... List Comprehensions Haskell (and other languages like Miranda) provides a special notation for constructing new lists from old: suppose xs = [1,2,3,4,5,6], then [ 2*x | x <- xs ] is the list [2,4,6,8,10,12]. ...
... List Comprehensions Haskell (and other languages like Miranda) provides a special notation for constructing new lists from old: suppose xs = [1,2,3,4,5,6], then [ 2*x | x <- xs ] is the list [2,4,6,8,10,12]. ...
scheme1 - Department of Computer Science and Electrical
... interpreted as data (i.e., a list of four elements) or code (calling function ‘A’ to the three parameters B, C, and D) • Reliance on Recursion – iteration is provided too, but recursion is considered more natural • Garbage Collection – frees programmer’s explicit memory management ...
... interpreted as data (i.e., a list of four elements) or code (calling function ‘A’ to the three parameters B, C, and D) • Reliance on Recursion – iteration is provided too, but recursion is considered more natural • Garbage Collection – frees programmer’s explicit memory management ...
Introduction to Functional Programming
... 1. The constructors are distinct, so we know that there is no ambiguity. The cases for O and S x don't overlap. 2. The constructors are injective, so we can always recover x from S x if we want to use x in the body of that clause. 3. The constructors are exhaustive, so we know that if we have a case ...
... 1. The constructors are distinct, so we know that there is no ambiguity. The cases for O and S x don't overlap. 2. The constructors are injective, so we can always recover x from S x if we want to use x in the body of that clause. 3. The constructors are exhaustive, so we know that if we have a case ...
Introduction to Emacs and Emacs lisp
... Leave the arrow along C-f = forward to next character C-b = back to previous character C-n = move to next line C-p = move to previous line C-e = move to the end of the line C-a = move to the start of the line ...
... Leave the arrow along C-f = forward to next character C-b = back to previous character C-n = move to next line C-p = move to previous line C-e = move to the end of the line C-a = move to the start of the line ...
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, ...
recursive functions
... A functional program is an expression, and executing a program means evaluating the expression. There is no state, meaning there are no variables. No assignments, since there is nothing to assign to. No sequencing. No repetition but recursive functions instead. Functions can be used more flexibly. ...
... A functional program is an expression, and executing a program means evaluating the expression. There is no state, meaning there are no variables. No assignments, since there is nothing to assign to. No sequencing. No repetition but recursive functions instead. Functions can be used more flexibly. ...
lectur15
... It is possible in Scheme to define a function that builds Scheme code and requests its interpretation, This is possible because the interpreter is a user-available function, EVAL For example, suppose we have a list of numbers that must be ...
... It is possible in Scheme to define a function that builds Scheme code and requests its interpretation, This is possible because the interpreter is a user-available function, EVAL For example, suppose we have a list of numbers that must be ...
Functional programming languages
... It is possible in Scheme to define a function that builds Scheme code and requests its interpretation, This is possible because the interpreter is a user-available function, EVAL For example, suppose we have a list of numbers that must be ...
... It is possible in Scheme to define a function that builds Scheme code and requests its interpretation, This is possible because the interpreter is a user-available function, EVAL For example, suppose we have a list of numbers that must be ...
Java Software Structures, 4th Edition Exercise Solutions, Ch. 8
... Write a recursive method to reverse a string. Explain why you would not normally use recursion to solve this problem. public String reverse (String text) ...
... Write a recursive method to reverse a string. Explain why you would not normally use recursion to solve this problem. public String reverse (String text) ...
PLD VII Haddad
... – Simple syntax – Inefficient execution – Programs can automatically be made concurrent ...
... – Simple syntax – Inefficient execution – Programs can automatically be made concurrent ...
Lisp - University of Connecticut
... (minus_b_over_2a (/ (- 0 b) (* 2 a))) (LIST (+ minus_b_over_2a root_part_over_2a)) (- minus_b_over_2a root_part_over_2a)) ...
... (minus_b_over_2a (/ (- 0 b) (* 2 a))) (LIST (+ minus_b_over_2a root_part_over_2a)) (- minus_b_over_2a root_part_over_2a)) ...