Quotes About Classes

I didn't like school at all. I never liked the seven different classes system. I liked having just one, like in elementary school - less disruption. I liked history. I failed math and science and gave those teachers a hard time.

When I was teaching at Harvard in the 1970s, I went to Project Incorporated in Cambridge and took photography classes. I didn't even know how to aim the camera in those days.

With all of the stuff downstairs, the three of us settled on the floor and began sorting it all out. Father Andrew gave us instructions on what to save and what to throw out, and it was a relief to be off my feet for a change this week. He made small talk as we worked, asking me about classes and other things. It wasn't so bad.

The major obstacle to a religious renewal is the intellectual classes, who are highly influential and tend to view religion as primitive superstition. They believe that science has left atheism as the only respectable intellectual stance.

Every system is built from a domain-specific language designed by the programmers to describe that system. Functions are the verbs of that language, and classes are the nouns.

Don't refer to volatile concrete classes. Refer to abstract interfaces instead. This rule applies in all languages, whether statically or dynamically typed. It also puts severe constraints on the creation of objects and generally enforces the use of Abstract Factories.

Don't derive from volatile concrete classes. This is a corollary to the previous rule, but it bears special mention. In statically typed languages, inheritance is the strongest, and most rigid, of all the source code relationships; consequently, it should be used with great care. In dynamically typed languages, inheritance is less of a problem, but it is still a dependency—and caution is always the wisest choice.

When classes lose cohesion, split them!

If we tried to design the component dependency structure before we designed any classes, we would likely fail rather badly. We would not know much about common closure, we would be unaware of any reusable elements, and we would almost certainly create components that produced dependency cycles.

If a component contains software that should be reused, it should not also contain software that is not designed for reuse. Either all the classes in a component are reusable, or none of them are.

CRP says that classes that are not tightly bound to each other with class relationships should not be in the same component.

Procedural code (code using data structures) makes it easy to add new functions without changing the existing data structures. OO code, on the other hand, makes it easy to add new classes without changing existing functions.

The complement is also true: Procedural code makes it hard to add new data structures because all the functions must change. OO code makes it hard to add new functions because all the classes must change.

The SOLID principles tell us how to arrange our functions and data structures into classes, and how those classes should be interconnected. The use of the word "class" does not imply that these principles are applicable only to object-oriented software. A class is simply a coupled grouping of functions and data. Every software system has such groupings, whether they are called classes or not. The SOLID principles apply to those groupings.

THE COMMON CLOSURE PRINCIPLE Gather into components those classes that change for the same reasons and at the same times. Separate into different components those classes that change at different times and for different reasons.

If we tried to design the component dependency structure before we designed any classes, we would likely fail rather badly. We would not know much about common closure, we would be unaware of any reusable elements, and we would almost certainly create components that produced dependency cycles. Thus the component dependency structure grows and evolves with the logical design of the system.

A sex scandal will always draw a crowd, but a sex scandal involving the ruling classes is titillating beyond measure.

For Nature is accustomed to rehearse with certain large, perhaps baser, and all classes of wild (animals), and to place in the imperfect the rudiments of the perfect animals.

Beware of artists, they mix with all classes of society and are therefore most dangerous.

Society is divided into two classes, the shearers and the shorn.

The pervasive attitude of fatalism among Indians of all classes was yet another factor affecting the spirit of Indian armies—victory and defeat were not in their hands, they believed; whatever was destined to happen would happen. This

I'm even a fool at the flower arrangement. I ought to have a Ph.D. in the subject the number of classes I've been to but still my efforts show as much evidence of art as walking sticks in an umbrella stand.

I'm sorry to pull you out of your classes, but your adviser understands," Kitteredge said. "He's a friend of the family." So that's it, Neal thought. You bought me; you own me.

Mark Bevir argues, "Democracy now seems less a means of expressing a common good and more a contest among factions or classes.