Tutorial by Examples: ce

Set process affinity mask

public static void SetProcessAffinityMask(int affinity, string processName = null) { Process myProcess = GetProcessByName(ref processName); Console.WriteLine("Process {0} Old Affinity Mask is : {1}", processName, FormatAffinity((int)myProcess.ProcessorAffinity)...

.NET Framework • Process and Thread affinity setting

Calculate the GC% of a sequence

In molecular biology and genetics, GC-content (or guanine-cytosine content, GC% in short) is the percentage of nitrogenous bases on a DNA molecule that are either guanine or cytosine (from a possibility of four different ones, also including adenine and thymine). Using BioPython: >>> from...

bioinformatics • Sequence analysis

Different Reference Types

java.lang.ref package provides reference-object classes, which support a limited degree of interaction with the garbage collector. Java has four main different reference types. They are: Strong Reference Weak Reference Soft Reference Phantom Reference 1. Strong Reference This is the usual...

Java Language • Reference Types

Single Document Interface Versus Multiple Document Interfaces

Be aware that Microsoft Excel 2013 (and higher) uses Single Document Interface (SDI) and that Excel 2010 (And below) uses Multiple Document Interfaces (MDI). This implies that for Excel 2013 (SDI), each workbook in a single instance of Excel contains its own ribbon UI: Conversely for Excel...

excel-vba • Common Mistakes

Passing by reference using ref keyword.

From the documentation : In C#, arguments can be passed to parameters either by value or by reference. Passing by reference enables function members, methods, properties, indexers, operators, and constructors to change the value of the parameters and have that change persist in the calling e...

C# Language • Value type vs Reference type

Difference between jQuery(fn) and executing your code before

Using the document-ready event can have small performance drawbacks, with delayed execution of up to ~300ms. Sometimes the same behavior can be achieved by execution of code just before the closing </body> tag: <body> <span id="greeting"></span> world! <sc...

jQuery • document-ready event

Changing cached resources

The easiest method to bypass cache is to change the URL. This is used as a best practice when the URL contains a version or a checksum of the resource, e.g. http://example.com/image.png?version=1 http://example.com/image.png?version=2 These two URLs will be cached separately, so even if …?versi...

HTTP • Caching HTTP responses

One line showing commiter name and time since commit

tree = log --oneline --decorate --source --pretty=format:'"%Cblue %h %Cgreen %ar %Cblue %an %C(yellow) %d %Creset %s"' --all --graph example * 40554ac 3 months ago Alexander Zolotov Merge pull request #95 from gmandnepr/external_plugins |\ | * e509f61 3 months ago Ievg...

Git • Browsing the history

Pass Activity as WeakReference to avoid memory leaks

It is common for an AsyncTask to require a reference to the Activity that called it. If the AsyncTask is an inner class of the Activity, then you can reference it and any member variables/methods directly. If, however, the AsyncTask is not an inner class of the Activity, you will need to pass an A...

Android • AsyncTask

Calling an instance method on a Java object

You can call an instance method using the . special form: (.trim " hello ") ;;=> "hello" You can call instance methods with arguments like this: (.substring "hello" 0 2) ;;=> "he"

clojure • Java interop

Referencing an instance field on a Java Object

You can call an instance field using the .- syntax: (def p (java.awt.Point. 0 1)) (.-x p) ;;=> 0 (.-y p) ;;=> 1

clojure • Java interop

Module as Namespace

Modules can contain other modules and classes: module Namespace module Child class Foo; end end # module Child # Foo can now be accessed as: # Child::Foo end # module Namespace # Foo must now be accessed as: # Namespace::Child::Foo

Ruby Language • Modules

Create new file in Google Drive of a certain Mime type

function createGoogleDriveFileOfMimeType() { var content,fileName,newFile;//Declare variable names fileName = "Test File " + new Date().toString().slice(0,15);//Create a new file name with date on end content = "This is the file Content"; newFile = DriveApp.cre...

google-apps-script • DriveApp

Select a word without surrounding white space

Suppose we want to select a word without surrounding white spaces, use the text object iw for inner word using visual mode: Got to normal mode by pressing ESC Type viw at the beginning of a word This will select the inner word

vim • Vim Text Objects

Descending from TList making it specific

type TIntegerList = class(TList<Integer>) public function Sum: Integer; end; ... function TIntegerList.Sum: Integer; var Item: Integer; begin Result := 0; for Item in Self do Result := Result + Item; end;

Embarcadero Delphi • Generics

Creating an Instance of a Stopwatch

A Stopwatch instance can measure elapsed time over several intervals with the total elapsed time being all individual intervals added together. This gives a reliable method of measuring elapsed time between two or more events. Stopwatch stopWatch = new Stopwatch(); stopWatch.Start(); double d =...

C# Language • Stopwatches

Multiprocessing.Pool

The simple answer, when asking how to use threads in Python is: "Don't. Use processes, instead." The multiprocessing module lets you create processes with similar syntax to creating threads, but I prefer using their convenient Pool object. Using the code that David Beazley first used to...

Python Language • Working around the Global Interpreter Lock (GIL)

Very basic example demonstrating function use on SetTimer.

;Sends the keystroke for the letter "a" every 3 seconds. #Persistent SetTimer, SendLetterA, 3000 return SendLetterA() { Send, a }

AutoHotkey • Use functions instead of labels

Advanced use of SetTimer: Calling the same function with different parameters

This is an example of something that would have been straight up impossible with labels. If you execute the same label multiple times at the same time and they rely on variables that are being defined within them, they very likely interfere and cause unexpected behavior. Here is how to do it with f...

AutoHotkey • Use functions instead of labels

Introduction to matrices

When you are programming in OpenGL or any other graphics api you will hit a brick wall when you are not that good in math. Here I will explain with example code how you can achieve movement/scaling and many other cool stuff with your 3d object. Let's take a real life case... You've made a awesome (...

opengl • 3d Math