null
Releasing an object that can be [NSNull null] or not
I have a memory management problem I can\'t get my head around on iOS. I\'m getting data from a SQLite db where some cells can be empty. So to handle this case, I assign [NSNull null] to my recipient[详细]
2023-04-09 03:16 分类：问答Why does the Eclipse Java compiler check casts from null?
Consider the following Java snippet: public class Test { public static void use(Object[] x) { } public static void main(String[] args) {[详细]
2023-04-08 21:03 分类：问答Null parameter checking in C#
In C#, are there any good reasons (other than a better error message) for adding parameter null checks to every function where null is not a开发者_Python百科 valid value? Obviously, the code that uses[详细]
2023-04-08 20:35 分类：问答get function in perl w/ website does not produce a value inside the perl script
I\'m trying to get index.pl?home=home to produce the value \'home\' within my perl script, or home=anything to produce \'anything\'.[详细]
2023-04-08 18:15 分类：问答NSMutableDictionary returns 0xffffffff instead of nil when a key doesn't exist
I have an NSMutableDictionary that is doing something strange: (gdb) po listenerRegistry { } (gdb) po productI开发者_Go百科D[详细]
2023-04-08 12:16 分类：问答How to check if String is null
I am wondering if there is a special method/trick to check if a String object is null.开发者_如何学Python I know about the String.IsNullOrEmpty method but I want to differentiate a null String from an[详细]
2023-04-08 06:13 分类：问答Passing NULL for array parameter in C/C++
开发者_开发百科void DoSomeThing(CHAR parm[]) { } int main() { DoSomeThing(NULL); } Is the passing NULL for array parameter allowed in C/C++?What you cannot do is pass an array by value. The signat[详细]
2023-04-08 04:49 分类：问答RESTKIT internal mapping fails if json value == NULL
I am using RESTKIT to map the properties from the server side to the properties in the client side. I am hitting the [NSNull unsignedIntValue] error when RESTKIT is trying to map a NULL value from th[详细]
2023-04-07 14:54 分类：问答How to control casting of null int field to varchar in sql server?
First of all I would like to know how does CAST work with NULL fields and how does it behave when the value is NULL?[详细]
2023-04-07 10:25 分类：问答Trying to set screen brightness on android phone
I am trying to set the screen brightness but when I try and get the current window with this.getWindow() I开发者_C百科 get null. Why is this? I will post all of my code in my setBrightness() method.[详细]
2023-04-07 06:48 分类：问答
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