Bottom-up Programming and Differs from Top-down Programming

Bottom-up Programming and Differs from Top-down Programming Points : what is meant by bottom-up programming? how does it differs from top-down programming, advantages of bottom-up programming Bottom-up Programming Bottom-up programming is the opposite of top-down programming. It refers to a style of programming where an application is constructed starting with existing primitives of the programming language and construction gradually more and more complicated features, until all of the application has been written. Advantages of Bottom-up ProgrammingBottom-up programming has several advantages over top-down programming. Testing is simplified since no stubs are needed. While it might be necessary to write test functions, these are simpler to write than stubs and sometimes not necessary at all in particular if one uses an interactive programming environment such as common lisp or GDB.

Pieces of command written in bottom up tend to be more general, and thus more reusable then pieces of programs written in top down. Infect one can argue that the purpose bottom up programming is to create an application specific language such a language is suitable for implementing an entire class of applications not only that is to be written. This fact greatly simplifies maintenance in particular adding new features to the application. It also make it possible to delay the final decision concerning the exact functionality of the application being able to delay this decision makes it less likely that the client has changes his or her mind between the establishment of the specifications of the application and its implementation. Top-down” Programming In a language such as C or Java, bottom-up programming takes the form of constructing abstracted data types of primitives of the language or from existing abstract data types.

In common Lisp, in addition to constructing abstract data types, it is common to build functions bottom-up programming from simpler functions and to use macros to construct new special forms from simpler ones. One may a why it is not possible to construct functions and special forms bottom-up in other language than common lisp. Constructing functions bottom-up requires a way of passing complicated arguments between functions. Common lisp uses lists for such argument passing. Lists are flexible standardized data structures in the language. In other language, data structure would have to be defined for such parameter passing only making it more Like an abstract data type, than just a function with respect to special forms only the two level syntax of common lisp allows a flexible enough macro facility for bottom-up programming of special forms.

Comments

Post a Comment

Popular posts from this blog

Difference Between Mouse and Trackball

Difference Between Mouse and Trackball Points : Difference Between Mouse and Trackball, comparison Between Mouse and Trackball, Mouse vs Trackball Difference Between Mouse and Trackball Mouse Trackball 1. The mouse has to be moved when used. The track ball Is stationary. 2. A mouse consists of a metal or plastic housing or caring, a ball at its base and is rolled on a flat horizontal surface. You use a trackball by the rolling the ball with your palm and fingers. 3. Mouse are popular among light computer users. Trackball are popular among heavy computer users. 4. A mouse has ability to transmit textual information. A trackball can placed on any surface. 5. Mouse is commonly use Trackball is rear use.
Read more

The Eagle Who Lived Like a Hen - Story

The Eagle Who Lived Like a Hen Short Story on "The Eagle Who Lived Like a Hen" In a forest an eagle lived on a tree. It had built a nest wherein to lay its eggs. There the eagle would hatch its eggs all through the day. Under the same tree there lived a hen. The hen had also laid eggs during the same period when the eagle had laid its eggs. One day, while the eagle had gone for hunting, a bear climbed up the tree to eat the eagle’s eggs. The bear had finished three of the eggs when the fourth one slipped off its hands and fell into the hen’s nest. On returning, the eagle could not find her eggs. Feeling terribly upset, she decided to leave the place. The hen which lived under the tree saw the eagle’s egg by the side of her eggs. She felt eggs pity on the eagle’s egg, and decided to hatch it too. After a few days, the hen’s chicks hatched. The eagle’s chick hatched, too. The hen would feed all the chicks, including the eagle’s chick, as if it were her own. Soon the chi
Read more

THE MILLER OF THE DEE - MCQs

THE MILLER OF THE DEE - MCQs English 9th Chapter "THE MILLER OF THE DEE" Multiple Choice Questions The Miller of the Dee was written by __________. William Wordsworth Robert Frost J.H. Leigh Hunt Charles Mackay The Dee is a _________. kingdom mountain river forest The Miller was happy because he was __________. not rich not envious not lonely not coward “No lark more blithe than he” means ___________. he was as happy as a bird he was bright as a lark the lark was happier than him there were no happy larks The mill was worked by ___________ power. horse water gas steam The king sighed because he was __________. envious tired unhappy bored The miller thanked the river Dee because it provided him __________. freedom food earning food and earning The moral of the poem “The Miller of the Dee” is that __________. contentment is everything envy is the root of all happiness money can’t buy happiness the poor are happier than the rich “Such men as thou are England’s
Read more