PROGRAMMING ERLANG SOFTWARE FOR A CONCURRENT WORLD PRAGMATIC PROGRAMMERS

GOTOS ARE UNNECESSARY Fortunately there is a mathematical theorem thanks to Bohm and Jacopini guaran-teeing that any program written using goto statements can be transformed into an equi[r]

From the program structure diagrams we can derive the pseudo-code for each of the two programs: PROGRAM 1 THE BREAKER OPEN FILES READ LINE WHILE NOT END OF FILE DO WHILE NOT END OF LINE [r]

SELF-TEST QUESTION
6.2 A library method draws a line from one set of coordinates to another. What type of cohesion does it exhibit?
In this form of programming, methods and data that are strongly related are grouped together into an object. This matches exactly the ideas of[r]

prompts us to consider whether we should have firewalls within programs to protect
programs against themselves. Many computer systems provide no such facility – when a program goes berserk, it can overwrite anything within the memory available to it. But if we examine a typical progr[r]

What about data?
What is the role of data in the method? It does rather play second fiddle to the actions that have to be taken. The making of the cup of coffee illustrates that, by concentrating on what the software should do, considerations of data are ignored, or rather postponed. The id[r]

16.4 INTERFACE CLOCK { VOID INIT; VOID WAITSECONDSINT SECONDS; INT GETHOURS; INT GETMINUTES; INT GETSECONDS; } INTERFACE DISPLAY { VOID INIT; VOID FLASHLIGHT; VOID UNFLASHLIGHT; VOID SOU[r]

FIGURE 11.2 The non-library classes involved in the game program Defender Alien Laser TRANG 6 While we are identifying classes and methods, we can document each class as a UML class diag[r]

5.6 ● INTERFACE DESIGN 60 Chapter 5■ User interface design ■ display only the information that is relevant to the current context ■ use a presentation format that enables rapid assimilat[r]

Now we create an image object conveniently like this: TRANG 9 156 Chapter 12 ■Design patterns CREATEIMAGE is class static method of the class IMAGE.. It looks at the extension of the fil[r]

A classic example of the Layers pattern is the structure of the software for internet communication, called the TCP/IP stack. Every computer that uses the internet has this software. A typical application program makes requests on the transport layer that supports[r]

In the words of Niklaus Wirth, the designer of Pascal, “Algorithms + Data Structures = Programs” – which asserts the symbiosis between data 14.1 ● INTRODUCTION 14 THE BASICS THIS CHAPTER[r]

In addition, explicit keywords eliminate the classic “dangling else” problem preva- lent in many languages – see the discussion of selection statements below
Ideally the static, physical layout of a program should reflect as far as is possible the dynamic algorithm which the program descr[r]

The actual parameter is purely an output parameter; the procedure should not be able to read the value of the actual parameter TRANG 3 190 Chapter 14 ■The basics Ada does not specify whe[r]

_We see that in order to comprehend any component that uses global data we have to_ _understand all the components that use it._ TRANG 7 74 Chapter 6■ Modularity In general, local data i[r]

The advantages of GUIs include: ■ they are relatively easy to learn and use ■ the user can use multiple windows for system interaction ■ fast, full-screen interaction is possible with im[r]

Here is a program fragment that uses the classes SPRITE, ALIENand TRANG 3 BOMBto create two objects, storing them in an array list named GAME, and displaying them.. The display is shown [r]

32.2 ● SOFTWARE TOOLS 32.1 ● INTRODUCTION CHAPTER 32 CONCLUSION THIS CHAPTER: ■ assesses the role of software tools ■ reviews the world of programming languages ■ assesses the role of so[r]

TRANG 6 ELSE { RESULT.SETTEXT"YOU CANNOT VOTE"; } } In this program, there are two paths because the IFhas two branches and there-fore two sets of data will serve to ensure that all stat[r]

An example of using a filter is the command:
ls
When you type a Unix command such as this, you invoke the filter with the same name. The filter named ls displays on the screen the names of all the files in the current directory, one per line. Another tool, named wc , inputs a<[r]

TRANG 4 SOFTWARE ENGINEERING FOR STUDENTS A PROGRAMMING APPROACH FOURTH EDITION TRANG 5 Harlow Essex CM20 2JE England and Associated Companies throughout the world _Visit us on the World[r]