He points out that hepatitis C, once thought to be incurable, is today cured with new combination treatments. Image courtesy of suphakit73 at FreeDigitalPhotos.
I do, but I get a lot of email. However, sometimes I get overwhelmed. Some messages are lost in my mailbox, some are delayed until I can find time, some are delayed until I get around to answering a set of related messages this often happens to comments about potential errors in my books.
Unfortunately, longer and more thoughtful messages are more likely to get delayed than simple ones that have simple answers. Also, if you mail me, please try to make sure that I can reply to you.
I really hate it when I have written and sent a reply, just to find that the return address is invalid or inaccessible. Two kinds of messages have a relatively high chance of getting lost: If you fail to receive an answer, please consider if your question was of one of these kinds.
Also, unless you give your name, I am now likely to delete the message unread. This is a new policy.
I was never a great fan of pseudonyms, but I find that the chance of a polite technical conversation with the kind of person who thinks it cool to hide behind a name like suuupergeeek or coolGuy3 is getting too low for me to bother trying.
Why don't you make your website look modern? I'm a "contents provider" not a website designer.
I can use my time to improve the contents or the looks, but not both. What looks "cool and modern" to someone is often considered bad taste by someone else, and fashions change fast. Also, very plain html downloads and displays faster than anything else, and many people still suffer from slow web connections.
Is "bjarne" an impostor? Most of the newsgroup postings, interviews, etc. I have been known to post to newsgroups from my gmail account where my user-id is "Bjarne"; somehow, that seems to confuse some people.
If in doubt, consider the style and contents of the suspect message, check for other postings in the forum, or ask. What is so great about classes? Classes are there to help you organize your code and to reason about your programs. You could roughly equivalently say that classes are there to help you avoid making mistakes and to help you find bugs after you do make a mistake.
In this way, classes significantly helps maintenance.
A class is the representation of an idea, a concept, in the code. An object of a class represents a particular example of the idea in the code.
Without classes, a reader of the code would have to guess about the relationships among data items and functions - classes make such relationships explicit and "understood" by compilers.
With classes, more of the high-level structure of your program is reflected in the code, not just in the comments.
A well-designed class presents a clean and simple interface to its users, hiding its representation and saving its users from having to know about that representation. If the representation shouldn't be hidden - say, because users should be able to change any data member any way they like - you can think of that class as "just a plain old data structure"; for example: When designing a class, it is often useful to consider what's true for every object of the class and at all times.
Such a property is called an invariant. For example, the invariant of a vector could be that its representation consists of a pointer to a number of elements and that number of elements is stored in an integer.
It is the job of every constructor to establish the class invariant, so that every member function can rely on it.
Every member function must leave the invariant valid upon exit. This kind of thinking is particularly useful for classes that manage resource, such as locks, sockets, and files.
For example, a file handle class will have the invariant that it holds a pointer to an open file. The file handle constructor opens the file. Destructors free resources acquired by constructors. For example, the destructor for a file handle closes the file opened by the constructor: What is "OOP" and what's so great about it?
There are lots of definitions of "object oriented", "object-oriented programming", and "object-oriented programming languages". That said, object-oriented programming is a style of programming originating with Simula more than 40 years ago!
See What's so great about classes? The point about arranging classes into a class hierarchy is to express hierarchical relationships among classes and use those relationships to simplify code.aihua.
Hello Alexander, I am very glad that you joined the Chinese learning journey with us! Thank you very much for your encouragement!
I totally agree with you, “Never too old to learn.”. How do you pronounce "Bjarne Stroustrup?" It can be difficult for non-Scandinavians.
The best suggestion I have heard yet was "start by saying it a few times in Norwegian, then stuff a potato down your throat and do it again:)" Here is a wav file. For people who can't receive sound, here is a suggestion: Both of my names are pronounced with two syllables: Bjar-ne Strou-strup.
Do you hate grocery shopping as much as I do? Do you wander through the countless shelves back and forth to pick your items? Do you happen to write the products . Keep me posted with regular updates from the White House.
required. Canadian Aboriginal syllabic writing, or simply syllabics, is a family of abugidas (writing systems based on consonant-vowel pairs) used to write a number of indigenous Canadian languages of the Algonquian, Inuit, and (formerly) Athabaskan language families.
They are valued for their distinctiveness from the Latin script of the dominant languages and for the ease with which literacy can be.
The largest collection of Hello World programs on the Internet.