Search results
- Dictionarynullify/ˈnʌlɪfʌɪ/
verb
- 1. make legally null and void; invalidate: "it is at the discretion of the court to nullify the decision" Similar Opposite
Powered by Oxford Dictionaries
Aug 2, 2013 · We could change the value of one of them, and it wouldn't affect the other: list1 = null; System.out.println(list2.size()); // Just prints 0. Now if instead of changing the variables, we make a change to the object that the variables' values refer to, that change will be visible via the other variable too:
250. "" is an actual string, albeit an empty one. null, however, means that the String variable points to nothing. a==b returns false because "" and null do not occupy the same space in memory--in other words, their variables don't point to the same objects. a.equals(b) returns false because "" does not equal null, obviously.
May 10, 2013 · 1. There are two features of null we should understand: null is an empty or non-existent value. null must be assigned. You can assign null to a variable to denote that currently that variable does not have any value but it will have later on. A null means absence of a value. example:-. let a = null;
Feb 26, 2020 · The compiler switches will be set by -D option during make. The names will always consist of the same prefix and the variable name. Since it is always the same strategy, my idea is to replace this using a macro like: DECLARE(var1) DECLARE(var2) Calling make -DENABLE_var1 should result in: int var1; Calling make -DENABLE_var1 -DENABLE_var2 ...
Foreign Key is nullable, navigation property is mapped as Optional, so I expect the cascade delete to work as described as MSDN - i.e. to nullify MasterID's of all children and then delete the Master object. But when I actually try to delete, I get the FK violation error:
May 27, 2017 · For future readers: if "min-height: none;" doesn't work for you, try to nullify min-height property with the value 0. – Jakub Siwiec Commented Sep 6, 2020 at 17:18
How do you deal with a DateTime that should be able to contain an uninitialized value (equivalent to null)? I have a class which might have a DateTime property value set or not. I was thinking of
Jun 13, 2010 · 5. You can set any pointer to NULL, though NULL is simply defined as 0 in C++: myObject *foo = NULL; Also note that NULL is defined if you include standard headers, but is not built into the language itself. If NULL is undefined, you can use 0 instead, or include this: #ifndef NULL. #define NULL 0. #endif.
Dec 19, 2009 · 1. (A) "sounds like arguing that you shouldn't fix a bug" Not setting a pointer to NULL is not a bug. (B) "But setting it to NULL would actually cause exactly the same bug" No. Setting to NULL hides double delete. (C) Summary: Setting to NULL hides double delete, but exposes stale references.
Jul 13, 2016 · However, we can tackle this from a different angle (in a class): Since the variable can point to null, let's define the variable in a way that it can't be set to null: so c will not be set to null. A struct per your requirements: public bool hasData { get { return Data != null; } } public Class1 Data;
