Best way to clone an ArrayList?

[Chris Bellini]

I was just looking for some opinions on the best way to clone an
ArrayList object. For example, if class A contains an ArrayList, what
would be the best way to make a copy of it for class B (but not using
the class constructors):

class A
{
public A()
{
// constructor stuff goes here
}

public void DoStuff()
{
ArrayList arrTPB = new ArrayList();

arrTPB.Add("Ricky");
arrTPB.Add("Julian");
arrTPB.Add("Bubbles");

// new B object
B myB = new B();

// copy arrTPB from class A to arrNames of myB
// ???
}
}
class B
{
public ArrayList arrNames;

public B()
{
arrNames = new ArrayList();
// other constructor stuff goes here
}
}

Thanks in advance.

Chris

[Alvo von Cossel I]

hi,

i'm not sure if i understood the question properly but couldnt you just copy
and paste the class?

--
Alvo von Cossel I of Germany
"Chris Bellini" wrote:

I was just looking for some opinions on the best way to clone an
ArrayList object. For example, if class A contains an ArrayList, what
would be the best way to make a copy of it for class B (but not using
the class constructors):

class A
{
public A()
{
// constructor stuff goes here
}

public void DoStuff()
{
ArrayList arrTPB = new ArrayList();

arrTPB.Add("Ricky");
arrTPB.Add("Julian");
arrTPB.Add("Bubbles");

// new B object
B myB = new B();

// copy arrTPB from class A to arrNames of myB
// ???
}
}
class B
{
public ArrayList arrNames;

public B()
{
arrNames = new ArrayList();
// other constructor stuff goes here
}
}

Thanks in advance.

Chris

[Howard Swope]

Reply in text:

"Chris Bellini" <ch*************@spam.chrisbellini.blows.com> wrote in
message news:et**************@TK2MSFTNGP09.phx.gbl...

I was just looking for some opinions on the best way to clone an ArrayList
object. For example, if class A contains an ArrayList, what would be the
best way to make a copy of it for class B (but not using the class
constructors):

class A
{
public A()
{
// constructor stuff goes here
}

public void DoStuff()
{
ArrayList arrTPB = new ArrayList();

arrTPB.Add("Ricky");
arrTPB.Add("Julian");
arrTPB.Add("Bubbles");

// new B object
B myB = new B();

// copy arrTPB from class A to arrNames of myB
// ???
myB.PutNames(arrTPB); }
}
class B
{
public ArrayList arrNames;

public B()
{
arrNames = new ArrayList();
// other constructor stuff goes here
}
public PutNames(ArrayList al)
{
foreach (object obj in ArrayList)
{
if (!obj is string)
continue;
arrNames.Add(obj);
}
} }

Thanks in advance.

Chris

[Ytram]

myB.ArrayProperty = arrTPB;

Wouldn't this do what you need?

Chris Bellini wrote:

I was just looking for some opinions on the best way to clone an
ArrayList object. For example, if class A contains an ArrayList, what
would be the best way to make a copy of it for class B (but not using
the class constructors):

class A
{
public A()
{
// constructor stuff goes here
}

public void DoStuff()
{
ArrayList arrTPB = new ArrayList();

arrTPB.Add("Ricky");
arrTPB.Add("Julian");
arrTPB.Add("Bubbles");

// new B object
B myB = new B();

// copy arrTPB from class A to arrNames of myB
// ???
}
}
class B
{
public ArrayList arrNames;

public B()
{
arrNames = new ArrayList();
// other constructor stuff goes here
}
}

Thanks in advance.

Chris

[Chris Bellini]

Obvious, yet slick. Thx :)
Chris

Howard Swope wrote:

Reply in text:

"Chris Bellini" <ch*************@spam.chrisbellini.blows.com> wrote in
message news:et**************@TK2MSFTNGP09.phx.gbl...

I was just looking for some opinions on the best way to clone an ArrayList
object. For example, if class A contains an ArrayList, what would be the
best way to make a copy of it for class B (but not using the class
constructors):

class A
{
public A()
{
// constructor stuff goes here
}

public void DoStuff()
{
ArrayList arrTPB = new ArrayList();

arrTPB.Add("Ricky");
arrTPB.Add("Julian");
arrTPB.Add("Bubbles");

// new B object
B myB = new B();

// copy arrTPB from class A to arrNames of myB
// ???

myB.PutNames(arrTPB);

}
}
class B
{
public ArrayList arrNames;

public B()
{
arrNames = new ArrayList();
// other constructor stuff goes here
}

public PutNames(ArrayList al)
{
foreach (object obj in ArrayList)
{
if (!obj is string)
continue;
arrNames.Add(obj);
}
}

}

Thanks in advance.

Chris

[Howard Swope]

You might buy a little performance by using the AddRange method. I think it
still iterates over the collection, but the allocation would be done all at
once.

"Chris Bellini" <ch*************@spam.chrisbellini.blows.com> wrote in
message news:OT**************@TK2MSFTNGP09.phx.gbl...

Obvious, yet slick. Thx :)
Chris

Howard Swope wrote:

Reply in text:

"Chris Bellini" <ch*************@spam.chrisbellini.blows.com> wrote in
message news:et**************@TK2MSFTNGP09.phx.gbl...

I was just looking for some opinions on the best way to clone an
ArrayList object. For example, if class A contains an ArrayList, what
would be the best way to make a copy of it for class B (but not using the
class constructors):

class A
{
public A()
{
// constructor stuff goes here
}

public void DoStuff()
{
ArrayList arrTPB = new ArrayList();

arrTPB.Add("Ricky");
arrTPB.Add("Julian");
arrTPB.Add("Bubbles");

// new B object
B myB = new B();

// copy arrTPB from class A to arrNames of myB
// ???

myB.PutNames(arrTPB);

}
}
class B
{
public ArrayList arrNames;

public B()
{
arrNames = new ArrayList();
// other constructor stuff goes here
}

public PutNames(ArrayList al)
{
foreach (object obj in ArrayList)
{
if (!obj is string)
continue;
arrNames.Add(obj);
}
}

}

Thanks in advance.

Chris

[cody]

ArrayList.Clone();
"Chris Bellini" <ch*************@spam.chrisbellini.blows.com> schrieb im
Newsbeitrag news:et**************@TK2MSFTNGP09.phx.gbl...

I was just looking for some opinions on the best way to clone an
ArrayList object. For example, if class A contains an ArrayList, what
would be the best way to make a copy of it for class B (but not using
the class constructors):

class A
{
public A()
{
// constructor stuff goes here
}

public void DoStuff()
{
ArrayList arrTPB = new ArrayList();

arrTPB.Add("Ricky");
arrTPB.Add("Julian");
arrTPB.Add("Bubbles");

// new B object
B myB = new B();

// copy arrTPB from class A to arrNames of myB
// ???
}
}
class B
{
public ArrayList arrNames;

public B()
{
arrNames = new ArrayList();
// other constructor stuff goes here
}
}

Thanks in advance.

Chris