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What is a smart pointer and when should I use one?
...he MyObject is automatically destroyed.
// ptr->Oops(); // Compile error: "ptr" not defined
// since it is no longer in scope.
}
Note that std::unique_ptr instances cannot be copied. This prevents the pointer from being deleted multiple times (incorrectly). You can, how...
Why do we need virtual functions in C++?
...here is not such a virtual method in some base class, then you’ll get an error (which is desirable).
The ugliness of doing this without virtual methods
Without virtual one would have to implement some Do It Yourself version of the dynamic binding. It’s this that generally involves unsafe man...
Finding a branch point with Git?
...o work... I either get something more recent, or just a silent failure (no error message, but exit status 1), trying arguments like git co master; git merge-base --fork-point topic, git co topic; git merge-base --fork-point master, git merge-base --fork-point topic master (for either checkout), etc....
Java 8: performance of Streams vs Collections
...
Result:
Benchmark Mode Samples Mean Mean error Units
StreamVsVanilla.stream avgt 10 17.588 0.230 ns/op
StreamVsVanilla.vanilla avgt 10 10.796 0.063 ns/op
Just as I expected stream implementation is fairly s...
How can I create an executable JAR with dependencies using Maven?
... Using the approach in this answer results in the following error message: 'Failed to load Main-Class manifest attribute from <jar file>', when trying to run the JAR using 'java -jar <jar file>'
– Elmo
Sep 10 '10 at 11:37
...
Javascript when to use prototypes
...alert("B");
};
myObject.getB(); // This works fine
myObject.getA(); // Error!
var myPrototypeCopy = new myObject();
myPrototypeCopy.getA(); // This works, too.
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What's the difference between a temp table and table variable in SQL Server?
...(ORDER BY (SELECT 0))) % 20
FROM sys.all_columns
END TRY
BEGIN CATCH
PRINT ERROR_MESSAGE()
END CATCH
BEGIN TRAN Update10Rows
SAVE TRAN Update10Rows
COMMIT
UPDATE $(tablename)
SET InRowFiller = LOWER(InRowFiller),
OffRowFiller =LOWER(OffRowFiller),
LOBFiller =LOWER(LOBFiller)
BEGIN TRAN...
R and version control for the solo data analyst
...nt you have produced them. Let's say that one of the reviewer discovers an error in one of your scripts: how would you know which results are effected and which are not?
In this sense, a backup system is not sufficient because it is probably done only once per day, and it doesn't apply labels to t...
Difference between DateTime and Time in Ruby
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Newer versions of Ruby are able to handle larger values without producing errors.
DateTime is a calendar-based approach where the year, month, day, hour, minute and second are stored individually. This is a Ruby on Rails construct that serves as a wrapper around SQL-standard DATETIME fields. These...
Python read-only property
...t responsible user would set attr that literally can be set and will raise error somewhere else in code due to his set. So in the end both attr cannot be set. Should I use property on both or don't use it on any?
– Rafał Łużyński
Jan 30 '13 at 0:12
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