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What are the differences between a pointer variable and a reference variable in C++?
...t reference can contain nullptr.
int *p = nullptr;
int &r = nullptr; <--- compiling error
int &r = *p; <--- likely no compiling error, especially if the nullptr is hidden behind a function call, yet it refers to a non-existent int at address 0
Pointers can iterate over an array; you...
git replace local version with remote version
... "master" (the remote/origin repository) like this:
git checkout master <FileWithPath>
Example:
git checkout master components/indexTest.html
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Implements vs extends: When to use? What's the difference?
... class (not EXACTLY the same but pretty much).
Also java doesn't support multiple inheritance for classes. This is solved by using multiple interfaces.
public interface ExampleInterface {
public void doAction();
public String doThis(int number);
}
public class sub implements ExampleInter...
Use String.split() with multiple delimiters
...or |, the problem is that one of your delimiters can be a part of your result 'tokens'. This will not happen with Peter Knego's [-.]+
– Jack'
Jan 3 '18 at 16:05
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How to initialize/instantiate a custom UIView class with a XIB file in Swift
... @jr.root.cs Yes this answer is good, that's why nobody should alter it. This is Sam's answer, not yours. If you want to comment on it, leave a comment; if you want to post a new/updated version, do it in your own post. Edits are meant to fix typos/indentation/tags not to add your version...
SQL update fields of one table from fields of another one
...
The question is old but I felt the best answer hadn't been given, yet.
Is there an UPDATE syntax ... without specifying the column names?
General solution with dynamic SQL
You don't need to know any column names except for some unique column(s) to joi...
Rolling back a remote Git repository
...
You can use git revert <commit>… for all the n commits, and then push as usual, keeping history unchanged.
Or you can "roll back" with git reset --hard HEAD~n. If you are pushing in a public or shared repository, you may diverge and break o...
How to pass parameters to a partial view in ASP.NET MVC?
...stem.Web.WebPages.WebPageExecutingBase.Write(System.Web.WebPages.HelperResult)' has some invalid arguments error. How should I implement the controller method? Should it have input parameters?
– Saeed Neamati
Jul 1 '11 at 15:06
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How to rethrow the same exception in SQL Server
...ate number.
int errorNumber=(int)command.ExecuteScalar();
if(errorNumber=<SomeNumber>)
{
MessageBox.Show("Some message");
}
Hope this helps,
EDIT :- Just a note, If you want to get the number of records affected and trying to use ExecuteNonQuery, the above solution may not work for you...
How to convert date to timestamp?
... the most interoperable format for date strings.
– Walter Tross
Dec 4 '14 at 13:54
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