Hello,
I'm working on a small project and I have to search ArrayList that contains simple object list. This is my object:
public class NameValue
{
private string strName;
private string strValue;
public NameValue( string sNameValuePair )
{
StringTokenizer tok = new StringTokenizer( sNameValuePair, "=" );
this.strName = tok.nextElement().Trim();
this.strValue = tok.nextElement().Trim();
}
private void splitName( StringTokenizer tok )
{
this.strName = tok.nextElement();
string temp = this.strName;
}
public string Name
{
get { return strName; }
set { strName = value; }
}
public string Value
{
get { return strValue; }
set { strValue = value; }
}
}
This is code where I call BinarySearch method:
public ArrayList AddPairToList( string sNameValuePair )
{
int nPos;
NameValue nv = new NameValue( sNameValuePair );
SortByName();
nPos = a.BinarySearch( nv, new CompareCustomDataType() );
if( nPos < 0 )
{
a.Add( nv );
}
else
{
MessageBox.Show( "The item you tried to add to the list already exist!" );
}
return GetCurrentList();
}
And this is my CompareCustomDataType class:
public class CompareCustomDataType : IComparer
{
public int Compare( object x, object y )
{
if (x == null) return -1;
if (y == null) return 1;
NameValue xNameValue = (NameValue) x;
NameValue yNameValue = (NameValue) y;
if( xNameValue.Name.CompareTo( yNameValue.Name ) > 0 )
{
return 1;
}
else if( xNameValue.Name.CompareTo( yNameValue.Name ) < 0 )
{
return -1;
}
return String.Compare( xNameValue.Value, yNameValue.Value );
}
}
However, it doesn't work properly. Actually, my list seems like this:
Australia = Canberra
Austria = Wiena
Canada = Toronto
Canada = Ottawa
...
When I try to add some pair to the list and if only unique pair already exist in the list (when I say unique pair I mean only one pair with unique name and unique value such as: Australia, Canberra) everything works fine, but when I try to add some pair to the list that already exist and if it is not unique pair (when I say "it is not unique pair" I mean I have pairs with the same name and different values such as: Canada, Toronto; Canada, Ottawa), first couple of times I get proper message "The item you tried to add to the list already exist!". After that, the object that already exist is added to the list and I have duplicate...
Would you be so kind to help me to fix this problem...
Thank you in advance,
Goran Tesic
Answers (5)
4
Remembering the code can be difficult, but there are a few things you can do to help:
- Practice Regularly
- Use Mnemonics
- Write Code by Hand
- Understand, Don’t Memorize
- Build Projects
- Break Code into Chunks
- Use Code Editors with Autocomplete
- Review and Refactor the code
- Educate others
- Stay Curious
- Stay Updated
A combination of these strategies can improve your ability to remember and use the code successfully. Thanks!
!! Happy Learning !!
4 To remember code effectively, practice coding regularly. By consistently solving problems and building projects, you develop memory and deepen your understanding of codes.
3 To remember code:
- Practice often - hands-on coding sticks.
- Understand, don’t memorize - grasp the logic.
- Build projects - real use makes it memorable.
- Review regularly - keep refreshing your memory.
- Use cheat sheets - Striver, Love Babbar, and others are great resources.
- Work on algorithms - solve similar problems to strengthen understanding.
- Follow structured paths - ike Coding Ninjas; once confident, move to LeetCode.
- Debug actively - understand the solution logic deeply so you can tweak it without memorizing.
3 Practice! practice! practice!
pracice makes a man perfect
2 Hi friend,
There is no need to remember code actually; while building project tell yourself each and every code. :)