How to remove indentical ones from list dart :flutter

Question

I have a list like this in my dart file:

List data = [{anjaaabq, 5:30}, {anjaaabq, 9:00}, {anjaaabq, 5:30},
{anjaaabq, 9:00},{amammama, 5:30}, {amammama, 9:00}, {anjaaabq, 5:30},
{anjaaabq, 9:00},{amammama, 5:30}, {amammama, 9:00}, {anjaaabq, 5:30},
{anjaaabq, 9:00},{amammama, 5:30}, {amammama, 9:00}, {arun, 5:30}, 
{arun, 9:00}];

So, I want to make this look like

[{anjaaabq, 5:30}, {anjaaabq, 9:00}, {amammama, 5:30}, {amammama, 9:00},
{arun, 5:30}, {arun, 9:00}];

How can I remove identical objects from this list?

i tried to data = data.toString but it only showing {{anjaaabq, 5:30}, {anjaaabq, 5:30}, {anjaaabq, 5:30}, {anjaaabq, 5:30}} like this

Does this answer your question? [How can I delete duplicates in a Dart List? list.distinct()?](https://stackoverflow.com/questions/12030613/how-can-i-delete-duplicates-in-a-dart-list-list-distinct) — MendelG, May 04 '21 at 19:30

Huthaifa Muayyad · Answer 1 · 2021-05-04T19:37:30.467

1

You can use toSet() method, which will conver it into a set. A set is a list with unique elements. So just call this after your list:

List data = [{anjaaabq, 5:30}, {anjaaabq, 9:00}, {anjaaabq, 5:30},
{anjaaabq, 9:00},{amammama, 5:30}, {amammama, 9:00}, {anjaaabq, 5:30},
{anjaaabq, 9:00},{amammama, 5:30}, {amammama, 9:00}, {anjaaabq, 5:30},
{anjaaabq, 9:00},{amammama, 5:30}, {amammama, 9:00}, {arun, 5:30}, 
{arun, 9:00}];

List uniqueData = data.toSet().toList(); // will give you the list you want, with unique items.

edited May 04 '21 at 19:37

answered May 04 '21 at 19:26

Huthaifa Muayyad

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use `List uniqueData = data.toSet().toList();` it'll work. – Huthaifa Muayyad May 04 '21 at 19:37
1

i also tried that too but that didnt worked – engineers choice May 04 '21 at 19:38
the list was the same , no change – engineers choice May 04 '21 at 19:40
What are your `amammama` objects? This means that they aren't identical. Or flutter can't tell that they are identical, because you haven't set up equality operators for them. Post those classes. – Huthaifa Muayyad May 04 '21 at 19:43

score 0 · Answer 2 · answered May 04 '21 at 19:56

thank you so much all at last i got the solution


List arrayTrap =[];





void main(){
   
  data.forEach((element){
    
    arrayTrap.add(element.toString());
    
  });
  print(arrayTrap.toSet().toList());
  
}```

i just convert that into string before convert in to set


so i got output like:
```[{anjaaabq, 5:30}]```

How to remove indentical ones from list dart :flutter

2 Answers2