Tutorial by Examples: ti

Go has a built-in logging library known as log with a commonly use method Print and its variants. You can import the library then do some basic printing: package main import "log" func main() { log.Println("Hello, world!") // Prints 'Hello, world!' on a single ...

There are many cases when one has created an NSDate from only an hour and minute format, i.e: 08:12 The downside for this situation is that your NSDate is almost completely "naked" and what you need to do is to create: day, month, year, second and time zone in order to this object to &quo...

If ww have NSDate object, and we want to convert it into NSString. There are different types of Date strings. How we can do that?, It is very simple. Just 3 steps. Create NSDateFormatter Object NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; Set the date format in whi...

NSAttributedString (and its mutable sibling NSMutableAttributedString) allows you to create strings that are complex in their appearance to the user. A common application is to use this to display a string and adding custom kerning / letter-spacing. This would be achieved as follows (where label ...

Gray Level Co-Occurrence Matrix (Haralick et al. 1973) texture is a powerful image feature for image analysis. The glcm package provides a easy-to-use function to calculate such texutral features for RasterLayer objects in R. library(glcm) library(raster) r <- raster("C:/Program Files/R...

The package mmand provides functions for the calculation of Mathematical Morphologies for n-dimensional arrays. With a little workaround, these can also be calculated for raster images. library(raster) library(mmand) r <- raster("C:/Program Files/R/R-3.2.3/doc/html/logo.jpg") plot...

If you know the format of the string you are converting (parsing) you should use DateTime.ParseExact Dim dateString As String = "12.07.2003" Dim dateFormat As String = "dd.MM.yyyy" Dim dateValue As Date dateValue = DateTime.ParseExact(dateString, dateFormat, Globalization.C...

Simply use the .ToString overload of a DateTime object to get the format you require: Dim dateValue As DateTime = New DateTime(2001, 03, 06) Dim dateString As String = dateValue.ToString("yyyy-MM-dd") '2001-03-06

set myVariable [expr { $myVariable * 17 }] This shows how you can use a simple expression to update a variable. The expr command does not update the variable for you; you need to take its result and write it to the variable with set. Note that newlines are not important in the little language un...

Example of declarations are: int a; /* declaring single identifier of type int */ The above declaration declares single identifier named a which refers to some object with int type. int a1, b1; /* declaring 2 identifiers of type int */ The second declaration declares 2 identifiers named a1 a...

By default, the tooltip will appear on top of the element. We can use data-placement attribute to set the position of the tooltip on top, bottom, left or the right side of the element. <a href="#" data-toggle="tooltip" data-placement="top" title="Top tooltip&q...

When inheriting from any base class, only one partial class needs to have the base class specified. // PartialClass1.cs public partial class PartialClass : BaseClass {} // PartialClass2.cs public partial class PartialClass {} You can specify the same base class in more than one partial clas...

If we consider a heterogenous list, wherein the elements of the list have varied but known types, it might be desirable to be able to perform operations on the elements of the list collectively without discarding the elements' type information. The following example implements a mapping operation ov...

Suppose the following generic interface has been declared: public interface MyGenericInterface<T> { public void foo(T t); } Below are listed the possible ways to implement it. Non-generic class implementation with a specific type Choose a specific type to replace the formal type ...

This option disables the garbage collector strategy changes. Compaction heuristics and nursery size heuristics are not affected by this option. By default, the garbage collection heuristics are enabled. Usage: -XXdisableFatSpin

Plain lists are useful for representing a sequence of elements, but sometimes it is more helpful to represent a kind of key to value mapping. Common Lisp provides several ways to do this, including genuine hash tables (see 18.1 Hash Table Concepts). There are two primary ways or representing key t...

Each Java Thread has an interrupt flag, which is initially false. Interrupting a thread, is essentially nothing more than setting that flag to true. The code running on that thread can check the flag on occasion and act upon it. The code can also ignore it completely. But why would each Thread have...

Two fingers rotating around a center can be listened for with the UIRotationGestureRecognizer. This is generally used for rotating a view. Swift override func viewDidLoad() { super.viewDidLoad() // Rotate let rotateGesture = UIRotationGestureRecognizer(target: self, action: #selec...

//Creates a Random instance with a seed of 12345. Random random = new Random(12345L); //Gets a ThreadLocalRandom instance ThreadLocalRandom tlr = ThreadLocalRandom.current(); //Set the instance's seed. tlr.setSeed(12345L); Using the same seed to generate random numbers will return the sa...

Time series data can be stored as a ts object. ts objects contain information about seasonal frequency that is used by ARIMA functions. It also allows for calling of elements in the series by date using the window command. #Create a dummy dataset of 100 observations x <- rnorm(100) #Convert ...