Delete Data From Arrays

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  13 years ago

  by blaknite

  blaknite

  Kingston, Canada

  Joined 17 years ago

  I have the following Arrays:

   Names () As String

  Salaries() As Decimal

  Names(0) = "Bob"             Salaries(0) = "100"

  Names(1) = "Fred"            Salaries(1) = "200"

  Names(2) = "Jack"           Salaries(2) = "300"

  Now I have a variable called intLocation that keeps track of where I am in the array, and I present the user with an input box that says "Enter the name of the person you want to delete"

  Now I figure I can write a For Loop to cycle through the array and find the person I am looking for (save array index to intLocation?). Now I've got to delete that person and their salary from the arrays......

  It would do me no good to just simply write for example Names(1) = String.Empty and Salaries(1) = String.Empty

  because then if I write the data on the screen, I would see a gap in my list.....

  So the question is, if I wanted to delete Fred from the array and his salary of 100, how would I move up Jack and his salary where Fred used to be along with any other data that may be below Jack that would also have to be moved up by 1?

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  13 years ago

  by Zorro_ot

  Oliver Tell

  Hamburg, Germany

  Joined 15 years ago

  If you have at least installed the .Net framework 2.0 you may want to have a look at System.Collections.Generics.List(of T) and its example.

  A list behaves very much like an array but when you remove an item a list closes the "gap" automatically.

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  13 years ago

  by jefftullin

  Jeff Tullin

  , United Kingdom

  Joined 13 years ago

  Collections also work in this way.

  The best method will involve creating a class to represent the person.

  This will have a name (let us assume this is unique)   as a string  attribute,

  and a salary   as a double    attribute.

   

  Then you create new people on demand, using something like

   thePerson = new (myPerson) 

  thePerson.name = "Jim"

  thePerson.salary = 23000

   

  Then you can add it to the collection:

  MyCollection.Add   thePerson,thePerson.Name        would probably do

   

  To see the contents of the collection, use

  for each APerson in MyCollection

     msgbox APerson.name 

   

  And to remove one,

   

  MyCollection.Remove ("Jim")

   

   

   

   

   

   

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