How to define arrays in Java, C/C++, and C#? Are they different?
JavaChina: SCJP Questions & Answers by Roseanne Zhang (8...float[] only applies to the first variable of the right variable list. float[] f1d_a, f1, f1d_b[]; // is equivalent to float f1d_a[]; // or float[] f1d_a; float f1; // f1 is not an array float f1d_b[]; // or float[] f1d_b; In Java, better, but still confusing!! float[] applies to all variable of the right variable list.
So what is meant by the ''equivalence of pointers and arrays'' in C?
Arrays and PointersMuch of the confusion surrounding arrays and pointers in C can be traced to a misunderstanding of this statement. Saying that arrays and pointers are ''equivalent'' means neither that they are identical nor even interchangeable. What it means is that array and pointer arithmetic is defined such that a pointer can be conveniently used to access an array or to simulate an array.
So what is meant by the "equivalence of pointers and arrays" in C?
The C Language FAQMuch of the confusion surrounding pointers in C can be traced to a misunderstanding of this statement. Saying that arrays and pointers are "equivalent" does not by any means imply that they are interchangeable. lvalue of type array-of-T which appears in an expression decays (with three exceptions) into a pointer to its first element; the type of the resultant pointer is pointer-to-T.
Do I need to know C++ before Java?
Java and C++ are meant for two different purposes. Of course they are two widely used OOPLs (Object Oriented Programming Languages). Knowing one is not a prerequisite to another. However, C is the prerequisite to both these language as these two use the same control structures of C.
How to communicate between Java and C++?
FAQ on C/C++/Unix by Roseanne Zhang, Java Programmer Certifi...Socket: you can pass any information from C/C++ to Java or Java to C/C++. However, if you want to call each other's method/function. You will find out you need to you need to marshal and unmarshal your methods by yourself. You're creating your own protocols. You'd be better off use CORBA. Corba is just for what you want, you use IDL to write your the function or methods, then compile it to C/C++ and Java to use.
Why is Kannel written in C and not in Java?
Kannel: Open Source WAP and SMS GatewayThe Kannel team does not have a strong expertise in Java, so re-implementing Kannel in Java would require us to spend weeks learning the language well. The re-implementation work itself would also take some months. There is no point in doing this.
Why do you not teach C++ or JAVA?
FAQEven though we have on staff several teachers who have computer science/programming backgrounds, we feel that these are not appropriate languages to teach the concepts of programming and have kids create a project on their own that they can be proud of. The software we use have been given numerous awards by educational technology magazines and are chosen as to their merit to teach programming.
How can I interface to C / Java?
scheme-faq-standardsMost Schemes support a so-called "foreign function interface" (FFI) to the native language (i.e. the language in which the Scheme interpreter/compiler was implemented). FFIs provide the following features: Calling native code from Scheme The most basic FFIs allow you to write functions/methods following certain conventions and then call these native functions/methods from Scheme.
What is the difference between Java and C++?
Java Language FAQsJava is a roubust and platform independent language which is used to develop business and internet applications. Function and class Templates. Java has Generics (which are simlar to Templates though not same) in version 5.0
HOW IS CUSTOMARRAY DIFFERENT FROM SPOTTED ARRAYS?
CombiMatrix - CustomArray Frequently Asked QuestionsCustomArray is an in situ synthesis technology. Oligonucleotide probes are synthesized directly on the chip. This means there are no up front costs of buying hundreds of different oligonucleotides, and making changes to chip designs and layouts is easy.
What are arrays in Java? Do all array elements be initialized to default value?
JavaChina: SCJP Questions & Answers by Roseanne Zhang (8...Arrays are objects in Java. Array elements are just member variables of the class, and they are initialized to default value as any other class of objects.MyObject[] myobjarray; There is no array here, only an array reference type variable called myobjarray. If it is a field in another class, myobjarray will be initialized to null. If it is in a method, it will not be initialised.
How is Hepatitis C different from Hepatitis A and Hepatitis B?
AIDS Action Committee of Massachusetts:Although Hepatitis A, B, and C are all viruses that damage the liver, they are all different and otherwise unrelated. Hepatitis A is spread through ingesting fecal matter (e.g. through changing diapers and not washing hands, performing oral to anal sex, eating contaminated food or drinking contaminated water, etc.). It is an acute infection that can make people extremely sick shortly after contracting the disease. Once people clear the virus, they cannot be reinfected.
What are the different ways that text can be rendered using Java 2D?
Java 2D FAQjava.awt.Graphics2D.drawString() draws a String of text using the current font and other rendering attributes. This is the most common and recommended API as it will automatically identify and properly handle complex scripts, Bidi etc. java.awt.font.TextLayout object allows you to implement text editing yourself: it includes mixed styles, BIDI text layout, carets, highlighting, hit testing and many other features. java.awt.font.
How would you define the different carrying capacities?
American Coach: Frequently Asked QuestionsPlease refer to the following definitions. You may also find these definitions in your Owner's Manual. GVWR (Gross Vehicle Weight Rating): Means the maximum permissible weight of this motor home. The GVWR is equal to or greater than the sum of the unloaded vehicle weight plus the net carrying capacity. GCWR (Gross Combined Weight Rating): Means the value specified by the motor home manufacturer as the maximum allowable loaded weight of this motor home with its towed trailer or towed vehicle.
So arrays are passed by reference, even though the rest of C uses pass by value?
Arrays and PointersWhy can't I do something like this? extern char *getpass(); char str[10]; str = getpass("Enter password: "); Arrays are ''second-class citizens'' in C; one upshot of this prejudice is that you cannot assign to them (see also question 6.7). When you need to copy the contents of one array to another, you must do so explicitly.
Does C++ have arrays whose length can be specified at run-time?
Freestore management, C++ FAQ LiteYes, in the sense that even built-in array types can specify the first index bounds at run-time. E.g., comparing with the previous FAQ, if you only need the first array dimension to vary then you can just ask new for an array of arrays, rather than an array of pointers to arrays: You can't do this if you need anything other than the first dimension of the array to change at run-time. But please, don't use arrays unless you have to. Arrays are evil. Use some object of some class if you can.
Will we ever get Java?
Answers to Some Frequent webtv.users QuestionsAccording to posts in webtv.users from Steve Perlman, ex-president of WebTV, WebTV has been working to provide a form of Personal Java for the WebTV Plus terminal (and possibly the new Classics and Dishplayer, but nothing was said specifically about them as they were not announced products at the time of the posts)?there is no guarantee this will happen. For the full text of Steve's posts, click here.
