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Questions tagged [initialization]

Initialization deals with the task of initializing the contents of your data structure. It's a common practice in statically-typed languages.

Initialization deals with the task of initializing the contents of data structures. This is the initialization of an object, structure, blob of data, or any entity which contains state that must be prepared prior to usage of the entity.

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How can I initialize a C# List in the same line I declare it. (IEnumerable string Collection Example)

I am writing my testcode and I do not want wo write: List nameslist = new List(); nameslist.Add("one"); nameslist.Add("two"); nameslist.Add("three"); I would love to write List nameslist = new List({"one", "two",…
Johannes
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Set attributes from dictionary in python

Is it possible to create an object from a dictionary in python in such a way that each key is an attribute of that object? Something like this: d = { 'name': 'Oscar', 'lastName': 'Reyes', 'age':32 } e = Employee(d) print e.name # Oscar print…
OscarRyz
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Why can I initialize a List like an array in C#?

Today I was surprised to find that in C# I can do: List a = new List { 1, 2, 3 }; Why can I do this? What constructor is called? How can I do this with my own classes? I know that this is the way to initialize arrays but arrays are…
Ignacio Soler Garcia
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In Scala, what exactly does 'val a: A = _' (underscore) mean?

What exactly does val a: A = _ initialize a value to? Is this a typed null? Thanks.
Gregor Scheidt
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Java: int array initializes with nonzero elements

According to the JLS, an int array should be filled by zeros just after initialization. However, I am faced with a situation where it is not. Such a behavior occurs first in JDK 7u4 and also occurs in all later updates (I use 64-bit implementation).…
Stanislav Poslavsky
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Why aren't pointers initialized with NULL by default?

Can someone please explain why pointers aren't initialized to NULL? Example: void test(){ char *buf; if (!buf) // whatever } The program wouldn't step inside the if because buf is not null. I would like to know why, in what…
Jonathan
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How to initialize a private static const map in C++?

I need just dictionary or associative array string => int. There is type map C++ for this case. But I need only one map forall instances(-> static) and this map can't be changed(-> const); I have found this way with boost library std::map
Meloun
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What is an initialization block?

We can put code in a constructor or a method or an initialization block. What is the use of initialization block? Is it necessary that every java program must have it?
Sumithra
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When does static initialization happen?

When are static fields initialized? If I never instantiate a class, but I access a static field, are ALL the static blocks and private static methods used to instantiate private static fields called (in order) at that instant? What if I call a…
Tony R
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Options for initializing a string array

What options do I have when initializing string[] object?
mrblah
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Cannot instantiate the type List

I have the following code: List product = new List(); The error: Cannot instantiate the type List Product is an Entity in my EJB project. Why I'm getting this error?
Emanuel
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How do I make a custom initializer for a UIViewController subclass in Swift?

Apologies if this has been asked before, I've searched around a lot and many answers are from earlier Swift betas when things were different. I can't seem to find a definitive answer. I want to subclass UIViewController and have a custom initializer…
Doug Smith
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Array[n] vs Array[10] - Initializing array with variable vs numeric literal

I am having the following issue with my code: int n = 10; double tenorData[n] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; Returns the following error: error: variable-sized object 'tenorData' may not be initialized Whereas using double tenorData[10]…
msmf14
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Are delphi variables initialized with a value by default?

I'm new to Delphi, and I've been running some tests to see what object variables and stack variables are initialized to by default: TInstanceVariables = class fBoolean: boolean; // always starts off as false fInteger: integer; // always starts…
MB.
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How to initialize an array in one step using Ruby?

I initialize an array this way: array = Array.new array << '1' << '2' << '3' Is it possible to do that in one step? If so, how?
user502052
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