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R provides two additional looping constructs, while and repeat, which are typically used in situations where the number of iterations required is indeterminate. The while loop The general form of a while loop is as follows, while (condition) { ## do something ## in loop body } whe...

First, let's see three different ways of extracting data from a file. string fileText = File.ReadAllText(file); string[] fileLines = File.ReadAllLines(file); byte[] fileBytes = File.ReadAllBytes(file); On the first line, we read all the data in the file as a string. On the second line, we r...

Iterating over connected serial ports using System.IO.Ports; string[] ports = SerialPort.GetPortNames(); for (int i = 0; i < ports.Length; i++) { Console.WriteLine(ports[i]); } Instantiating a System.IO.SerialPort object using System.IO.Ports; SerialPort port = new SerialPort(); ...

This example is about replacing a List element while ensuring that the replacement element is at the same position as the element that is replaced. This can be done using these methods: set(int index, T type) int indexOf(T type) Consider an ArrayList containing the elements "Program sta...

For a class Person like: public class Person { public string Name { get; set; } public int Age { get; set; } public string Clothes { get; set; } } var person1 = new Person { Name = "Jon", Age = 20, Clothes = "some clothes" }; var person2 = new Person { Name ...

For given type Person: public class Person { public string Name { get; set; } public int Age { get; set; } public string Clothes { get; set; } } List<Person> persons = new List<Person> { new Person{ Name = "Jon", Age = 20, Clothes = "some clothes...

There are two basic classes of exact numeric data types - Integer, and Fixed Precision and Scale. Integer Data Types bit tinyint smallint int bigint Integers are numeric values that never contain a fractional portion, and always use a fixed amount of storage. The range and storage sizes o...

float [(n)] real These data types are used to store floating point numbers. Since these types are intended to hold approximate numeric values only, these should not be used in cases where any rounding error is unacceptable. However, if you need to handle very large numbers, or numbers with an ...

These types are in all versions of SQL Server datetime smalldatetime These types are in all versions of SQL Server after SQL Server 2012 date datetimeoffset datetime2 time

char varchar text

nchar nvarchar ntext

binary varbinary image

cursor timestamp hierarchyid uniqueidentifier sql_variant xml table Spatial Types

This example shows how to render text along an arc. It includes how you can add functionality to the CanvasRenderingContext2D by extending its prototype. This examples is derived from the stackoverflow answer Circular Text. Example rendering Example code The example adds 3 new text renderi...

All modern JavaScript JIT compilers trying to optimize code based on expected object structures. Some tip from mdn. Fortunately, the objects and properties are often "predictable", and in such cases their underlying structure can also be predictable. JITs can rely on this to make pred...

C++17 Whenever a case is ended in a switch, the code of the next case will get executed. This last one can be prevented by using the ´break` statement. As this so-called fallthrough behavior can introduce bugs when not intended, several compilers and static analyzers give a warning on this. From ...

1 Tag Name Represents a tag name available in the DOM. For example $('p') selects all paragraphs <p> in the document. 2 Tag ID Represents a tag available with the given ID in the DOM. For example $('#some-id') selects the single element in the document that has an ID of some-id. 3 ...

1. A Simple Complete Example We could use this sample code to upload the files selected by the user every time a new file selection is made. <input type="file" id="file-input" multiple>   var files; var fdata = new FormData(); $("#file-input").on("cha...

One of the most common operations in erlang is pattern matching. It is used when assigning a value to a variable, in function declarations and in control-flow structures like case and receive statements. A pattern matching operation needs at least 2 parts: a pattern, and a term against wich the patt...

A pointer to member of derived class can be converted to a pointer to member of base class using static_cast. The types pointed to must match. If the operand is a null pointer to member value, the result is also a null pointer to member value. Otherwise, the conversion is only valid if the member ...