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Concepts, Techniques, and Models of Computer Programming - Chapter 4 pps

Concepts, Techniques, and Models of Computer Programming - Chapter 4 pps

Concepts, Techniques, and Models of Computer Programming - Chapter 4 pps

... roots of declarative concurrency.Concurrency is also a key part of three other chapters. Chapter 5 extends theeager model of the present chapter with a simple kind of communication chan-nel. Chapter ... forconcurrent object-oriented programming. Chapter 11 shows how to do distribut-ed programming, i.e., programming a set of computers that are connected by anetwork. All four chapters taken together ... namely demand-driven concurrency,alsoknownaslazy execution.Section 4. 5 introduces the lazy concurrent model and gives some of the mostimportant programming techniques, including lazy streams and...
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Concepts, Techniques, and Models of Computer Programming - Chapter 1 pps

Concepts, Techniques, and Models of Computer Programming - Chapter 1 pps

... huge number:933 26215 44 3 94 41526 81699 23885 62667 0 049 071596 82 643 81621 46 859 29638 95217 59999 3229915608 941 46 39761 56518 28625 36979 20827 2237582511 85210 91686 40 000 00000 00000 00000 ... has. A typical low-cost personal computer with 64 MB of memory can handle hundreds of thousands of digits. The skeptical reader willask: is this huge number really the factorial of 100? How can ... data-driven and demand-driven evaluation, respectively.Copyrightc 200 1-3 by P. Van Roy and S. Haridi. All rights reserved.16 Introduction to Programming Conceptselse nil endendInstead of...
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Concepts, Techniques, and Models of Computer Programming - Chapter 9 ppsx

Concepts, Techniques, and Models of Computer Programming - Chapter 9 ppsx

... productto 6-digit numbers then the naive solution takes 45 seconds.1The propagate- and- search solution of Chapter 12 takes less than 0 .4 second to solve the sameproblem.9.2.2 Puzzles and the n-queens ... X2]#B#(X1|X2|B)|Copyrightc 200 1-3 by P. Van Roy and S. Haridi. All rights reserved.6 74 Relational Programming tive proof of this [1 94, 188]. The successful series of conferences on PracticalApplications of Prolog ... example of a generate -and- test program: it generatesa set of possibilities and then it uses tests to filter out the bad ones. The tests useunification failure to reject bad alternatives. Generate -and- test...
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Concepts, Techniques, and Models of Computer Programming - Chapter 10 pps

Concepts, Techniques, and Models of Computer Programming - Chapter 10 pps

... instead of programming in models. We start from the declarative programming techniques of Chapter 3 and add state and concurrency ex-actly where it is needed. This is a practical example of combining ... directly withQTk. This chapter gives most of the key ideas underlyingQTk but only shows a small fraction of the availablewidgets.Structure of the chapter The chapter consists of four sections:Copyrightc ... and displays the best view in the place-holder:proc {Place}WW={QTk.wInfo width(P)}WH={QTk.wInfo height(P)}_#Handle={List.foldRInd Viewsfun {$ I W#H#Handle Min#CH}This=(W-WW)*(W-WW)+(H-WH)*(H-WH)inif...
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Concepts, Techniques, and Models of Computer Programming - Chapter 0 doc

Concepts, Techniques, and Models of Computer Programming - Chapter 0 doc

... Choosinganindexedcollection 44 16.5.3 Othercollections 44 26.6 Reasoningwithstate 44 46.6.1 Invariantassertions 44 46.6.2 Anexample 44 56.6.3 Assertions 44 86.6 .4 Proofrules 44 9Copyrightc 200 1-3 by P. Van Roy and ... . . . 1293 .4 Programmingwithrecursion 1303 .4. 1 Typenotation 1313 .4. 2 Programmingwithlists 1323 .4. 3 Accumulators 142 3 .4. 4 Differencelists 144 3 .4. 5 Queues 149 3 .4. 6 Trees 1533 .4. 7 Drawingtrees ... Object-orientedprogramming 42 16.3 Thedeclarativemodelwithexplicitstate 42 16.3.1 Cells 42 26.3.2 Semanticsofcells 42 46.3.3 Relationtodeclarativeprogramming 42 56.3 .4 Sharingandequality 42 66.4...
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Concepts, Techniques, and Models of Computer Programming - Chapter 2 pptx

Concepts, Techniques, and Models of Computer Programming - Chapter 2 pptx

... with single-shot channels. Chapters 4 and 5 show other types of channels (with sequences of messages) and do concurrent composition of processes.Copyrightc 200 1-3 by P. Van Roy and S. Haridi. ... of many other techniques. This book focuses on three in particu-lar: object-oriented programming, graphical user interface (GUI) design, and component-based programming. In object-oriented programming, ... use)Makes the grammar context-sensitive-(e.g., with EBNF)Set of extra conditionsIs easy to read and understand-Defines a superset of the language-+Figure 2.2: The context-free approach to language...
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Concepts, Techniques, and Models of Computer Programming - Chapter 3 docx

Concepts, Techniques, and Models of Computer Programming - Chapter 3 docx

... instead of standard lists:• Flatten of nil is X#X (empty difference list).• Flatten of X|Xr where X is a nested list, is Y1#Y4 whereflatten of X is Y1#Y2,flatten of Xr is Y3#Y4 ,and equateY2 and ... declarative model and situate it with respect to other models. Copyrightc 200 1-3 by P. Van Roy and S. Haridi. All rights reserved.3 .4 Programming with recursion 149 Look carefully and you will ... arguments IsDone and Transform are givenone-argument functions. Passing functions as arguments to functions is part of a range of programming techniques called higher-order programming. Thesetechniques...
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Concepts, Techniques, and Models of Computer Programming - Chapter 5 pptx

Concepts, Techniques, and Models of Computer Programming - Chapter 5 pptx

... inthe larger context of component-based programming. Because of message-passingconcurrency we no longer have the limitations of the synchronous “lock-step”execution of Chapter 4. We first introduce ... tuples:area({square, Side}) -& gt;Side*Side;area({rectangle, X, Y}) -& gt;X*Y;area({circle, Radius}) -& gt;3. 141 59*Radius*Radius;area({triangle, A, B, C}) -& gt;S=(A+B+C)/2;math:sqrt(S*(S-A)*(S-B)*(S-C)).This ... operation of the hypothetical lift control system of a build-ing, with a fixed number of lifts, a fixed number of floors between which liftstravel, and users. Figure 5 .4 gives an abstract view of what...
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Concepts, Techniques, and Models of Computer Programming - Chapter 6 pdf

Concepts, Techniques, and Models of Computer Programming - Chapter 6 pdf

... Algol-60 and structured programming [46 , 45 , 130], which led to Simula-67 and object-oriented program-ming [137, 152].2This book sticks to the traditional usage of declarative as stateless and ... elements of an array:Copyrightc 200 1-3 by P. Van Roy and S. Haridi. All rights reserved. 41 5A problem of terminologyStateless and stateful programming are often called declarative and imperative programming, ... theoperations of the abstract data type. This idea is at the heart of object-oriented programming, a powerful programming style that is elaborated in Chapter 7. Thepresent chapter and Chapter 7...
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Concepts, Techniques, and Models of Computer Programming - Chapter 7 ppt

Concepts, Techniques, and Models of Computer Programming - Chapter 7 ppt

... values, and the dynamic creation of classes. We start withforwarding since it is the simplest.Copyrightc 200 1-3 by P. Van Roy and S. Haridi. All rights reserved. 540 Object-Oriented Programming Applications ... The first way, often-used in object-oriented programming, uses inheritance. The second way uses higher-order programming. We will seethat the first way is just a syntactic variation of the second. ... as be-ing an object and to mix the notions of state and encapsulation. The advantagesto be gained by considering other entities than objects and by using encapsula-tion without state are often...
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