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Big O, how do you calculate/approximate it?
...n't a moron, its average case complexity is O(n log n) and it uses a pivot selection strategy that reduces the odds of hitting the O(n²) case). And both bsearch and qsort can be worse if the comparator function is pathological.
– ShadowRanger
Mar 21 '19 at 14:...
How do you convert a byte array to a hexadecimal string, and vice versa?
... }
return result;
}
static uint[] _Lookup32 = Enumerable.Range(0, 255).Select(i => {
string s = i.ToString("X2");
return ((uint)s[0]) + ((uint)s[1] << 16);
}).ToArray();
static string ByteArrayToHexViaLookupPerByte(byte[] bytes) {
var result = new char[bytes.Length * 2];
...
What reference do I need to use Microsoft.Office.Interop.Excel in .NET?
...You can install by either right clicking on References in your project and selecting Manage NuGet packages... and searching for one of the packages listed below, or install using the Package Manager Console:
PM> Install-Package Microsoft.Office.Interop.Excel
Microsoft.Office.Interop.Excel
Micro...
Getting URL hash location, and using it in jQuery
... the # symbol at the beginning.
Actually you don't need the :first pseudo-selector since you are using the ID selector, is assumed that IDs are unique within the DOM.
In case you want to get the hash from an URL string, you can use the String.substring method:
var url = "http://example.com/file.h...
What techniques can be used to speed up C++ compilation times?
...rated binary sizes.
Changing visibility options
In newer compilers you can select your symbols to be either visible or invisible in the Dynamic Shared Objects (DSOs). Ideally, changing the visibility can improve compiler performance, link time optimizations (LTOs), and generated binary sizes. If yo...
Android: Generate random color on click?
...
This approach might not yield the best results, It always ends up with a selection of similar colors that way too dark or way too bright.
Semi-random approach :
If you need some fresh and shiny colors then use the following simple class, that I wrote previously when I had the same issues. It's ...
Android Studio Project Structure (v.s. Eclipse Project Structure)
...
For android Studio 3.0.1 and selected all features:
Android O latest
Android Auto
Android things
Android wear
Android TV
C++ support
Kotlin support
The structure in version 3.0.1 does not look at all like all other answers.
Recent structure is as di...
Explicit specialization in non-namespace scope [duplicate]
... a lot. I was looking for this also as I need to access this. Wish I could select 2 answers.
– Mark
Jun 18 '10 at 3:20
7
...
machine learning libraries in C# [closed]
...iningSet trainingSet)
{
var attributes = trainingSet._attributes.Select(x => new Attribute(x)).ToArray();
var featureVector = new FastVector(trainingSet.AttributesCount);
foreach (var attribute in attributes)
{
featureVector.addElement(attribute);
}
...
How can building a heap be O(n) time complexity?
...ackward and calling siftDown. No matter which approach you choose, you are selecting the next item in the unsorted portion of the array and performing the appropriate operation to move it into a valid position in the ordered portion of the array. The only difference is performance.
...