#language-features

Answer: How to Correctly Use Lists in R? #solution #development #fix

How to Correctly Use Lists in R?

Brief background: Many (most?) contemporary programming languages in widespread use have at least a handful of ADTs [abstract data types] in common, in particular,

string (a (sequence comprised of characters)

list (an ordered collection of values), and

map-based type (an unordered array that maps keys to values)

In the R programming language, the first two are…

Fix: Difference between parseInt and valueOf in java? #computers #development #solution

Difference between parseInt and valueOf in java?

What’s the difference between these two methods? They appear to do exactly the same thing to me (also goes for parseFloat(), parseDouble(), parseLong() etc, how are they different from Long.valueOf(string) ?

Edit: Also, which of these is preferable and used more often by convention?

Answer [by Michael Haren]: Difference between parseInt and…

Answer: How does "this" keyword work within a JavaScript object literal? #programming #solution #development

How does "this" keyword work within a JavaScript object literal?

I just came across an interesting situation in Javascript. I have a class with a method that defines several objects using object-literal notation. Inside those objects, the this pointer is being used. From the behavior of the program, I have deduced that the thispointer is referring to the class on which the method was invoked,…

How to: VB.net equivalent of C# Property Shorthand?

VB.net equivalent of C# Property Shorthand?

Is there a VB.net equivalent to the C#:

public string FirstName { get; set; }

I know you can do

Public Property name() As String Get Return _name.ToString End Get Set(ByVal value As String) _name = value End Set End Property

But I can’t seem to google up an answer on a vb shorthand.

Answer: VB.net equivalent of C# Property Shorthand?

In Visual Studio…

Fixed What does the 'static' keyword do in a class? #dev #it #asnwer

What does the ‘static’ keyword do in a class?

To be specific, I was trying this code:

package hello; public class Hello { Clock clock = new Clock(); public static void main(String args[]) { clock.sayTime(); } }

But it gave the error ‘Cannot access non-static field in static method main’. So I changed the declaration of clock to this:

static Clock clock = new Clock();

And it worked. What does…

How to: What is the difference between a strongly typed language and a statically typed language?

What is the difference between a strongly typed language and a statically typed language?

And does one imply the other?

Thank you!

Answer: What is the difference between a strongly typed language and a statically typed language?

Strongly typed means that there are restrictions between conversions between types. Statically typed means that the types are not dynamic – you can not change the type…

How to: What is the tilde (~) in the enum definition?

What is the tilde (~) in the enum definition?

I’m always surprised that even after using C# for all this time now, I still manage to find things I didn’t know about…

I’ve tried searching the internet for this, but using the “~” in a search isn’t working for me so well and I didn’t find anything on MSDN either (not to say it isn’t there)

I saw this snippet of code recently, what does the tilde(~)…

How to: Why are private fields private to the type, not the instance?

Why are private fields private to the type, not the instance?

In C# (and many other languages) it’s perfectly legitimate to access private fields of other instances of the same type. For example:

public class Foo { private bool aBool; public void DoBar(Foo anotherFoo) { if(anotherFoo.aBool) ... } }

As the C# specification(sections 3.5.1, 3.5.2) states access to private fields is on a type, not…