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Tricks to manage the available memory in an R session
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I make aggressive use of the subset parameter with selection of only the required variables when passing dataframes to the data= argument of regression functions. It does result in some errors if I forget to add variables to both the formula and the select= vector, but it sti...
Hibernate throws MultipleBagFetchException - cannot simultaneously fetch multiple bags
...Many(mappedBy="parent", fetch=FetchType.EAGER)
@Fetch(value = FetchMode.SUBSELECT)
private List<Child> childs;
This should fix the issue, related to Hibernate bug HHH-1718
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How to list files in a directory in a C program?
... on terminal by a C program? Maybe I can use exec function to run find command but I want file name as a string to send client program. How can I do this?
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What is the difference between IQueryable and IEnumerable?
...es, meaning the custom query logic it receives, e.g., a predicate or value selector, is in the form of an expression tree instead of a delegate to a method.
IEnumerable<T> is great for working with sequences that are iterated in-memory, but
IQueryable<T> allows for out-of memory things ...
What is the difference between NULL, '\0' and 0?
...e appear to be differences between various values of zero -- NULL , NUL and 0 .
11 Answers
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mysqli or PDO - what are the pros and cons? [closed]
...ostname;dbname=school", $username, $password)
$stmt = $dbh->query("SELECT * FROM students");
/* MAGIC HAPPENS HERE */
$stmt->setFetchMode(PDO::FETCH_INTO, new Student);
foreach($stmt as $student)
{
echo $student->getFullName().'<br />';
}
$db...
Case insensitive Query with Spring CrudRepository
With Spring CrudRepository Query; I want to select "DeviceType" entities with it's "name" property. But following query select the entitles on case sensitive manner. How I make it case insensitive way. Thanks.
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How does a PreparedStatement avoid or prevent SQL injection?
...o in detail.
Compilation Phase:
In this phase, keywords used in query like select, from, where etc are converted into format
understandable by machine.
This is the phase where query is interpreted and corresponding action to be taken is decided.
It also has many other tasks to do, but let's not go ...
Undoing a commit in TortoiseSVN
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Go to Show Log Screen, select the revision that you want to undo, right click it and select Revert changes from this revision, this will do a reverse-merge.
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Visual Studio: Make view code default
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Right-click on a file and select "Open With..."
Select "CSharp Editor" and then click "Set as Default".
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