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What do Clustered and Non clustered index actually mean?
...h a clustered index the rows are stored physically on the disk in the same order as the index. Therefore, there can be only one clustered index.
With a non clustered index there is a second list that has pointers to the physical rows. You can have many non clustered indices, although each new index...
How to handle click event in Button Column in Datagridview?
...y the documentation at MSDN to hardcode the column index or column name in order to determine if a button was clicked. The click event registers for the entire grid, so somehow you need to determine that a button was clicked, but you should not do so by assuming that your button lives in a particul...
Django: “projects” vs “apps”
... @claymation , what should be included in settings (as app) in order to allow 'python manage.py makemigrations' or 'python manage.py migrate' to see the 'models.py' file in 'my product' directory ?
– mlwn
Aug 16 '16 at 10:47
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How can I specify a local gem in my Gemfile?
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In order to use local gem repository in a Rails project, follow the steps below:
Check if your gem folder is a git repository (the command is executed in the gem folder)
git rev-parse --is-inside-work-tree
Getting repository...
How does delete[] know it's an array?
Alright, I think we all agree that what happens with the following code is undefined, depending on what is passed,
16 Answe...
Order of serialized fields using JSON.NET
Is there a way to specify the order of fields in a serialized JSON object using JSON.NET ?
14 Answers
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Unique ways to use the Null Coalescing operator [closed]
...escing operator means you can write pretty simple comparisons (whether for ordering or equality). For example, using a couple of helper classes in MiscUtil:
public int Compare(Person p1, Person p2)
{
return PartialComparer.Compare(p1.Age, p2.Age)
?? PartialComparer.Compare(p1.Name, p2....
How do I specify unique constraint for multiple columns in MySQL?
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That way combination of three would be unique? Or all individual three columns would be unique?
– Gary Lindahl
Sep 15 '11 at 0:03
100
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git add all except ignoring files in .gitignore file
...roject that had none. The problem is that there are a lot of files to initially add to git with a .gitignore file, but I can't figure out how to add all files without including the files matching something in the .gitignore file.
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Flatten an Array of Arrays in Swift
...s:
array.compactMap({$0})
//Output
[1, 2, [[3, 4], [5, 6, [7]]], 8]
In order to solve this problem, we can use our simple for loop logic + recursion
func flattenedArray(array:[Any]) -> [Int] {
var myArray = [Int]()
for element in array {
if let element = element as? Int {
...