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

... class (Section 7. 2.4). – Taking advantage of dynamic typing. This gives first-class messages (Section 7. 2.5) and first-class attributes (Section 7. 2.6). This allows powerful forms of polymorphism ... every area of informatics, both in scientific research and technology development. The first object-oriented language was Simula 67, developed in 19 67 as a descendant of Algol 60...

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... 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, ... with single-shot channels. Chapters 4 and 5 show other types of channels (with sequences of messages) and do concurrent composition of processes. Copyright c  200 1-3 b...

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... in the larger context of component-based programming. Because of message-passing concurrency 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; 3.14159*Radius*Radius; area({triangle, A, B, C}) -& gt;...

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... was developed by Michael Maher and Vijay Saraswat out of concurrent logic programming and constraint logic pro- gramming [163, 1 17, 90]. All computation models of the book are ultimately basedonthismodel. The ... it is the most general model of the book. It covers all the computation models of the book ex- cept for the relational and constraint-based models. The semantic...

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... 76 7 12.5Implementingtherelationalcomputationmodel 77 7 12.5.1 The choice statement 77 8 12.5.2 Implementing the Solve function 77 8 12.6Exercises 77 8 IV Semantics 78 1 13 Language Semantics 78 3 13.1Theshared-stateconcurrentmodel 78 4 13.1.1Thestore ... First-classmessages 504 7. 2.6 First-class attributes 5 07 7.2 .7 Programmingtechniques 5 07 7.3 ClassesasincrementalADTs 5 07...

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... 626 67 00490 71 596 82643 81621 46859 29638 952 17 59999 32299 15608 94146 3 976 1 56518 28625 36 979 208 27 22 375 82511 85210 91686 40000 00000 00000 00000 00000 Copyright c  200 1-3 by P. Van Roy and ... 50388 75 582 92 378 92 378 75 582 50388 271 32 11628 3 876 969 171 19 1] Is this answer correct? How can you tell? It looks right: it is symmetric (reversing the list gives th...

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... 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 where flatten of X is Y1#Y2, flatten of Xr is Y3#Y4 ,and equate Y2 and ... the length of F. The trick is to do it only occasionally. We do it when F becomes empty, so that F is non-nil if and only 7 Queues implemented with explicit state (see Chapter...

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... introduces the lazy concurrent model and gives some of the most important programming techniques, including lazy streams and list compre- hensions. • Soft real-time programming. Section 4.6 explains ... roots of declarative concurrency. Concurrency is also a key part of three other chapters. Chapter 5 extends the eager model of the present chapter with a simple kind of...

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... Algol-60 and structured programming [46, 45, 130], which led to Simula- 67 and object-oriented program- ming [1 37, 152]. 2 This book sticks to the traditional usage of declarative as stateless and ... the operations 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. The presen...

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... paradigms of message-passing and shared-state concurrency. At the time of writing, we know of no books that deal with the third concurrent paradigm of declarative concurrency. Concurrent Programming ... object-oriented language (see Chapters 7 and 8). However, they can be used in many other languages including the shared-state concurrent model of this book. The book is targe...

Ngày tải lên: 14/08/2014, 10:22