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Nim how to define constructors?


Nim how to define constructors?

By : NBarclay
Date : October 17 2020, 03:08 PM
seems to work fine Is there a way in Nim to define constructors for an object? For example I have
code :
type
  Card = int
  Deck* = ref object
    cards* : array[52, Card]

proc newDeck: Deck =
  new result
  for i, c in result.cards.mpairs:
    c = i


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How to define private constructors in javascript?

How to define private constructors in javascript?


By : Megha M.
Date : March 29 2020, 07:55 AM
With these it helps
Is there a solution which will allow me to say x instanceof Score?
code :
var Score  = (function () {

  // the module API
  function PublicScore() {
    throw new Error('The constructor is private, please use Score.makeNewScore.');
  }

  // The private constructor
  var Score = function (score, hasPassed) {
      this.score = score;
      this.hasPassed = hasPassed;
  };

  // Now use either
  Score.prototype = PublicScore.prototype; // to make .constructor == PublicScore,
  PublicScore.prototype = Score.prototype; // to leak the hidden constructor
  PublicScore.prototype = Score.prototype = {…} // to inherit .constructor == Object, or
  PublicScore.prototype = Score.prototype = {constructor:null,…} // for total confusion :-)

  // The preferred smart constructor
  PublicScore.mkNewScore = function (score) {
      return new Score(score, score >= 33);
  };

  return PublicScore;
}());
> Score.mkNewScore(50) instanceof Score
true
> new Score
Error (…)
Why we need to define constructors in JavaScript

Why we need to define constructors in JavaScript


By : Jiorgio
Date : March 29 2020, 07:55 AM
may help you . If you do Rectangle.prototype = Shape.prototype then any modification that you will perform on Rectangle.prototoype will reflect on Shape.prototype because they are the same object.
To avoid this, we create a new object that has it's prototype link pointing to Shape.prototype using Object.create(Shape.prototype).
code :
function Rectangle() {}

Rectangle.prototype.constructor === Rectangle; //true
when is it obligatory to define constructors in subclasses?

when is it obligatory to define constructors in subclasses?


By : user2986024
Date : March 29 2020, 07:55 AM
like below fixes the issue Question : ...why should I define a constructor?
Answer: Since ArrayAdapter class has no default constructor, we need to define a constructor that matches one of the six constructors in the superclass.
Can't I define defaults if I define multiple overloaded constructors in Scala?

Can't I define defaults if I define multiple overloaded constructors in Scala?


By : Hamid Ali Khan
Date : March 29 2020, 07:55 AM
wish help you to fix your issue I've defined multiple constructors, with some default argument values in all of them. Looks correct (I can't see any ambiguity), but Scala (2.8) compiler complains: , Taken straight from the compiler's source code:
How to share same constructors across different classes aka define constructors in an interface?

How to share same constructors across different classes aka define constructors in an interface?


By : Moe K. Eidy
Date : March 29 2020, 07:55 AM
Hope that helps Edit: I just stumbled upon this answer, and it needs updating. Using @JvmOverloads could be an issue in certain custom views, as calling any of the constructors generated for your own class will first delegate into the all-params constructor within the class, and then call the all-params constructor of the super, instead of each constructor calling into the super method with the matching amount of parameters. See this article (for example) for details on that.
Original text of my answer below.
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