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How do I test if a string is empty in Objective-C?
How do I test if an NSString is empty in Objective-C?
30 Answers
30
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Enum String Name from Value
... the int back to an enumeration member with a simple cast, and then call ToString():
int value = GetValueFromDb();
var enumDisplayStatus = (EnumDisplayStatus)value;
string stringValue = enumDisplayStatus.ToString();
share
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How to post JSON to a server using C#?
... streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
string json = "{\"user\":\"test\"," +
"\"password\":\"bla\"}";
streamWriter.Write(json);
}
var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new StreamReader(h...
Map to String in Java
...n(map) in Java, I get a nice output in stdout. How can I obtain this same string representation of a Map in a variable without meddling with standard output? Something like String mapAsString = Collections.toString(map) ?
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Xcode 'Build and Archive' menu item disabled
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All you need to do is create an Executable File in your project folder... If you start with a fresh project there are NO executable projects, only what you create, be it a .cpp or a .m you need an executable in the folder.
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How does the keyword “use” work in PHP and can I import classes with it?
... consider when your auto loader is loading both classes (does by require), and you are about to use object of class. In this case, the compiler will get confused which class object to load among two. To help the compiler make a decision, you can use the use statement so that it can make a decision w...
C++中智能指针的设计和使用 - C/C++ - 清泛网 - 专注C/C++及内核技术
...释放对象拥有权限、引用计数等，控制权转移等）。auto_ptr 即是一种常见的智能指针。
智能指针通常用类模板实现：
template <class T>
class smartpointer
{
private:
T *_ptr;
public:
smartpointer(T *p) : _ptr(p) //构造函数
{
}
T& oper...
How to pass an array into a SQL Server stored procedure
... increased performance compared to other implementations including XML and string splitting.
The inputs are clearly defined (no one has to guess if the delimiter is a comma or a semi-colon) and we do not have dependencies on other processing functions that are not obvious without inspecting the co...
How should I have explained the difference between an Interface and an Abstract class?
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I will give you an example first:
public interface LoginAuth{
public String encryptPassword(String pass);
public void checkDBforUser();
}
Suppose you have 3 databases in your application. Then each and every implementation for that database needs to define the above 2 methods:
public cl...
How to pass boolean values to a PowerShell script from a command prompt
...arameter is used. In particular, the $false argument is being treated as a string value, in a similar way to the example below:
PS> function f( [bool]$b ) { $b }; f -b '$false'
f : Cannot process argument transformation on parameter 'b'. Cannot convert value
"System.String" to type "System.Bool...