searching an array list

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G

Guest

Hey

I need to search an array list to remove duplicate Data
The list is populated by a search function that enters in a name if the it is told too

This causes duplicate names to be entered into the array, the search function is not changable

e.

the array list has 5 values "jonny", I need to remove all the values but the 1st. The array can have several differnet copies of one name

Thanks

/Jonny
 
Hi Jonny,
Check out the forum answers in this link
http://www.experts-exchange.com/Programming/Programming_Languages/Visual_Basic/Q_20824139.html
I think it will help you

--
Rami Saad
Microsoft GTSC Developer support for Middle East


jonny said:
Hey,

I need to search an array list to remove duplicate Data.
The list is populated by a search function that enters in a name if the it is told too.

This causes duplicate names to be entered into the array, the search function is not changable.

e.g

the array list has 5 values "jonny", I need to remove all the values but
Click to expand...
the 1st. The array can have several differnet copies of one name.
 
Hey,

I need to search an array list to remove duplicate Data.
The list is populated by a search function that enters in a name if the it is told too.

This causes duplicate names to be entered into the array, the search function is not changable.

e.g

the array list has 5 values "jonny", I need to remove all the values but the 1st. The array can have several differnet copies of one name.

Thanks,

/Jonny
Click to expand...

One solution is to first sort the array, then loop through it. If an
items value is the same as the previous item, delete it.

HTH,
Tim
 
jonny said:
Hey,

I need to search an array list to remove duplicate Data.
The list is populated by a search function that enters in a name if the it is told too.

This causes duplicate names to be entered into the array, the search function is not changable.

e.g

the array list has 5 values "jonny", I need to remove all the values but the 1st. The array can have several differnet copies of one name.
Click to expand...

Try this:

// filledArrayList - your ArrayList
int index;

for(int i=0; i<(filledArrayList.Count-1); i++) {
index=filledArrayList.IndexOf(filledArrayList, i+1);
while( index>i ) {
filledArrayList.Remove(index);
if( i<(filledArrayList.Count-1) ) {
index=filledArrayList.IndexOf(filledArrayList, i+1);
}
else {
index=-1;
}
}
}

Regards

Marcin
 
maybe you should use Hashtable class instead of an ArrayList?

jonny said:
Hey,

I need to search an array list to remove duplicate Data.
The list is populated by a search function that enters in a name if the it is told too.

This causes duplicate names to be entered into the array, the search function is not changable.

e.g

the array list has 5 values "jonny", I need to remove all the values but
Click to expand...
the 1st. The array can have several differnet copies of one name.
 
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