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Widgets
Widgets

... provides a top level window -  Widget toolkit draws its own widgets and is responsible for mapping events to their corresponding widgets -  Examples: Java Swing, JQuery UI, WIndows WPF ...
Expressing C++ Template Metaprograms as Lambda expressions
Expressing C++ Template Metaprograms as Lambda expressions

... Variables are implemented by their name. A name symbol from the lambda expression becomes a name symbol in C++. Binding of the names in lambda abstractions is done by the C++ compiler. As we could see it in the previous example the lambda expression y becomes typedef y type in the C++ template metap ...
Implementing a non-strict purely functional language in JavaScript
Implementing a non-strict purely functional language in JavaScript

... function call may be another thunk). Due to JavaScript’s reference semantics for arrays, thunks may become shared between expressions over the course of evaluation. To prevent the same thunk from being reduced twice, the result of the call is written back into the array. If this result is a primitiv ...
Functional Programming in Haskell
Functional Programming in Haskell

... The question is not whether it can be done but how easily it can be done. It’s all about expressiveness of the language. ...
Introduction to JSON (JavaScript Object Notation)
Introduction to JSON (JavaScript Object Notation)

... • Lighter and faster than XML as on-the-wire data format • JSON objects are typed while XML data is typeless > JSON types: string, number, array, boolean, > XML data are all string ...
Executable Formal Specifications with Clojure
Executable Formal Specifications with Clojure

... written in imperative programming languages shows that assignment statements generate side-effects which explains the impure nature of the imperative programming. Like immutable data, pure functions are not characteristic only to functional programming: nothing prevents writing pure functions with i ...
Composite Datatypes --- Lists and Tuples
Composite Datatypes --- Lists and Tuples

... Recursion: if we can sort lists of length less than n, how can we sort lists of length n? Seeing a way to do this will be the basis for a recursive definition. Base case: sort [x] = [x] Recursive case: sort (x:y:xs) = ??? ...assume we can already do sort (y:xs) and that we have ...
9 Embedding SQL into Programming languages 9.1 Introduction
9 Embedding SQL into Programming languages 9.1 Introduction

... SQL from Programs: Introduction Overview of language / DB integration concepts Interface of standard programming languages • Call level interface, proprietary library routines, API Standardized: SQL CLI Open Database connection (ODBC), • Embedded C / Java / .. ...
Programming with Multiple Paradigms in Lua - DI PUC-Rio
Programming with Multiple Paradigms in Lua - DI PUC-Rio

... As an authentic scripting language, a design goal of Lua is to offer strong support for dual-language programming [7]. The API with C is a key ingredient of the language. To easy the integration between the scripting language and the host language, Lua is amenable to different kinds of programming: ...
Lecture 13 Introduction to High-Level Programming (S&G, §§7.1–7.6)
Lecture 13 Introduction to High-Level Programming (S&G, §§7.1–7.6)

... // Comments are not executable statements // but exist solely for the benefit of human readers int width = 20; ...


... waiting on the currently running thread to finish executing before they can start executing. To make the thread scheduler switch from the current running thread to allow others to execute, call the yield() method on the current thread. In order for yield() to work, there must be at least one thread ...
PolyP | a polytypic programming language extension
PolyP | a polytypic programming language extension

... they work for large classes of datatypes. Consider for example the function length :: List a -> Int, which counts the number of values of type a in a list. There is a very similar function length :: Tree a -> Int, which counts the number of occurrences of a's in a tree. We now want to generalise the ...
Introduction Into Functional Programming
Introduction Into Functional Programming

... 2.2 If the searched word is “less” then the shown ones, then 2.2.1 continue search within the left half of the book; otherwise 2.2.2 continue search within with the right half of the book. ...
An introduction to C++ template programming
An introduction to C++ template programming

... regarded, inaccurately, as an “object-oriented language”. While C++ historically evolved [Str94] from “C with classes”, the latest standard, C++11, defines a much more general language. Object-oriented programming is one of many programming styles supported by C++11. Note that using classes in C++ d ...
Interpreters for two simple languages – including exercises
Interpreters for two simple languages – including exercises

... as they can be further evaluated. Every top-level declarations let id = e is subject to the following restriction on e: • All monomorphic expressions are OK, • all value expressions are OK, even polymorphic ones, and • at top-level, polymorphic non-value expressions are forbidden An expresssion e in ...
Chapter 14
Chapter 14

... because the second catch clause can never be used. The code contained in the (optional) finally clause is executed whether an exception is thrown in the try construct or not. This is useful for “cleanup” code (closing files, other freeing of resources, ...) that must always be executed. Binding of e ...
4on1 - FSU Computer Science
4on1 - FSU Computer Science

... Catching Run-Time Errors Without Exception Handling C, Fortran 77, and Pascal do not support exception handling Other ways of catching and handling run-time errors have to be invented when a language does not support exception handling Adds "clutter" that obscures a program Method 1: Functions can r ...
9. Exception Handling - FSU Computer Science
9. Exception Handling - FSU Computer Science

... Catching Run-Time Errors Without Exception Handling C, Fortran 77, and Pascal do not support exception handling Other ways of catching and handling run-time errors have to be invented when a language does not support exception handling Adds "clutter" that obscures a program Method 1: Functions can r ...
Programming with Java
Programming with Java

... The boolean Data Type Revisited • You will find boolean variables very useful when setting and testing conditions for a loop. • An example of using a boolean variable is when you want to search through a list for a specific value. • The item may or may not be found but if a match is found you want t ...
Recursion
Recursion

...  Recursion is a math and programming tool  Technically, not necessary  Wasn’t available in early programming languages ...
EXCEPTION HANDLING Exception
EXCEPTION HANDLING Exception

... The throws keyword is used to declare an exception. It gives an information to the programmer that there may occur an exception so it is better for the programmer to provide the exception handling code so that normal flow can be maintained. Exception Handling is mainly used to handle the checked exc ...
Section 5 slides - Emory Math/CS Department
Section 5 slides - Emory Math/CS Department

... To fix this problem, delete if (n < 0) in (a), so that the compiler will see a return statement to be reached regardless of how the if statement is evaluated. Liang, Introduction to Java Programming, Ninth Edition, (c) 2013 Pearson Education, Inc. All rights reserved. ...
Type Classes in Haskell - Programming Research Laboratory
Type Classes in Haskell - Programming Research Laboratory

... Additional Key Words and Phrases: Functional programming, Haskell, type classes, types ...
05slide
05slide

... To determine the scope of variables (§5.9). To know how to use the methods in the Math class (§§5.105.11). To learn the concept of method abstraction (§5.12). To design and implement methods using stepwise refinement ...
Chapter 4 Methods - I.T. at The University of Toledo
Chapter 4 Methods - I.T. at The University of Toledo

... To determine the scope of variables (§5.9). To know how to use the methods in the Math class (§§5.105.11). To learn the concept of method abstraction (§5.12). To design and implement methods using stepwise refinement ...
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Scala (programming language)

Scala (/ˈskɑːlɑː/ SKAH-lah) is a programming language for general software applications. Scala has full support for functional programming and a very strong static type system. This allows programs written in Scala to be very concise and thus smaller in size than other general-purpose programming languages. Many of Scala's design decisions were inspired by criticism of the shortcomings of Java.Scala source code is intended to be compiled to Java bytecode, so that the resulting executable code runs on a Java virtual machine. Java libraries may be used directly in Scala code and vice versa (language interoperability). Like Java, Scala is object-oriented, and uses a curly-brace syntax reminiscent of the C programming language. Unlike Java, Scala has many features of functional programming languages like Scheme, Standard ML and Haskell, including currying, type inference, immutability, lazy evaluation, and pattern matching. It also has an advanced type system supporting algebraic data types, covariance and contravariance, higher-order types (but not higher-rank types), and anonymous types. Other features of Scala not present in Java include operator overloading, optional parameters, named parameters, raw strings, and no checked exceptions.The name Scala is a portmanteau of ""scalable"" and ""language"", signifying that it is designed to grow with the demands of its users.
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