When to use wrapper class and primitive type
Hello All, When i should go for wrapper class over primitive types? Or On what circumstance i should choose between wrapper / Primitive types? ...
primitive-types
Should I initialize ALL primitive data types to 'safe' values in Obj-C?
Is there any primitive data type that it's safe to not initialize? How about structs like CGPoints or NSRects? ...
How can I convert a LazySeq of Characters to a String in Clojure?
Let's say I have a LazySeq of java.lang.Character like (\b \ \! \/ \b \ \% \1 \9 \/ \. \i \% \$ \i \space \^@) How can I convert this to a String? I've tried the obvious (String. my-char-seq) but it throws java.lang.IllegalArgumentException: No matching ctor found for class java.lang.String (NO_SOURCE_FILE:0) [Thrown class clojure...
Can I have an optional boolean parameter for an ASP.NET SOAP Webservice
I want to build a webservice with this signature, which does not throw an exception if param2 is left empty. Is this possible? [WebMethod] public string HelloWorld(string param1, bool param2){} The exception is a System.ArgumentException that is thrown when trying to convert the empty string to boolean. Ideas that have not worked so ...
primitive types enum - does it exist
I need to provide a user a list of all primitive types available and was wondering if there is an Enum in the .net library that has all primitive types, so that I don't have to build one. ...
Why do primitive types in C# have their own operations?
Hello everyone, A few days ago, I decided to start learning C#. So, I got a book and started reading and practicing with code. I was surprised when I saw that string in C# is considered a primitive type. But I was more surprised when I saw that string, as well as all the other primitive types in C# have operations. I'm a Java developer...
Why java has "String" type and not "string" ?
Wrapper class are just fine and their purpose is also well understood. But why do we omit the primitive type ? ...
Java: Are there some quasi-standard APIs out there, which do int[] <-> Integer[] and similar?
Hello, everyone! I need to do lots of conversions between primitivetype[] and boxedtype[] (both directions). Such as: Integer[] <-> int[], Double[] <-> double[], ... I wanted to know, if there's some quasi-standards APIs out there, which provide such functionality, before I write such utility methods by myself. Java has 8 primitive ty...
Java: Using type punning on primitive arrays?
Hello, everyone! I need to be able to convert byte arrays to/from other primitive type arrays, but instead of casting, I need type punning. Correct term for raw copy without casting? I thought it would be possible to do the following: // idea: byte[12] -> int[3], and int[3] -> byte[12] int[] ints; ByteBuffer bb = ByteBuffer.wrap( ...
Boolean instanceof Object is true?
Hi Everyone, I've been learning Java in my spare time and have a quick question I can't seem to figure out. This code returns true: Boolean testBool = true; Boolean test = testBool instanceof Object; System.out.println(test); However, I thought Boolean was a primitive type and when I try this same logic with any other primitive type...
Calling Web Service with primitive types within Orchestration - Can't map request message.
Hi everybody. I'm running into this problem when trying to call a SOAP Web Service from within a Biztalk orchestration. The Web Service is an abapi exposed by SAP as a SOAP Web Service, and the signature of the web method I want to call is something like this: Operation(param1 as System.String, param2 as System.String, param3 ArrayOfS...
computing hash values, integral types versus struct/class
hello I would like to know if there is a difference in speed between computing hash value (for example std::map key) of primitive integral type, such as int64_t and pod type, for example struct { int16_t v[4]; };. what about int128_t versus struct {int32_t v[4];}? I know this is going to implementation specific, so my question ultimat...
How To Test if Type is Primitive
Hi Guys I have a block of code that serializes a type into a Html tag. Type t = typeof(T); // I pass <T> in as a paramter, where myObj is of type T tagBuilder.Attributes.Add("class", t.Name); foreach (PropertyInfo prop in t.GetProperties()) { object propValue = prop.GetValue(myObj, null); string stringValue = propValue != null ...
Are pointers primitive types in C++?
I was wondering about the last constructor for std::string mentioned here. It says: template<class InputIterator> string (InputIterator begin, InputIterator end); If InputIterator is an integral type, behaves as the sixth constructor version (the one right above this) by typecasting begin and end to call it: string(static_cast<size_t...
When to use primitive and when reference types in Java
In which case should you use primitive types(int) or reference types (Integer)? This question sparked my curiosity. ...
Stylecop - Determine if Double or Float
I'm using Stylecop to come up with some custom rules and I'm trying to determine if I have a double or a float. I'm able to walk through the statement and get a CSTokenType. The CSTokenType is number and can be read as a string. But since it's just a Number I have no real way of knowing if it's an int, float , long , double or whate...
Java: substitute for ArrayList cos primitive types not allowed in ArrayList?
Primitive types are not allowed in ArrayList, source. Partial solution: you can wrap prim.types such as int to Integer to form an extra class but a side effect. I want to index data, is there some substitute for ArrayList that allows primitive types? ...
in java, which is better - three arrays of booleans or 1 array of bytes?
I know the question sounds silly, but consider this: I have an array of ints (1..N) and a labelling algorithm. at any point the item the int represents is in one of three states. The current version holds these states in a byte array, where 0, 1 and 2 represent the three states. alternatively, I could have three arrays of boolean - one f...
[C++] Initializing Primitive Array to One Value
Is there a way to initialize an array of primitives, say a integer array, to 0? Without using a for loop? Looking for concise code that doesn't involve a for loop. :) ...
How to cast an array to an array with another primitive type
Hi, Can someone complete the code on an easy way? float[] floats = {...}; // create an array // Now I want to create a new array of ints from the arrays floats int[] ints = ????; I know I can simply cast element by element to a new array. But is it possible on an easier way? Thanks ...