Check if inner lists contain some string value in Flutter

Question

I have searched a lot. But couldn't get what I am looking for.

I have a list with inner lists as its objects

final posts = [ ["My First Post, "myPostId"], ["My SecondPost, "myPostId2"]..... ];

So, I want to check if the list contains the word First. It is working with 1D lists like

posts = ["My First Post", "My Second Post"];
posts.where((p)=>p.contain("First")....

//gives the correct result

But what's the way to get from the inner lists.

Actual Code

final suggestion = query.isEmpty?courseNameList:courseNameList
.where((test)=>test.contains(query.toLowerCase())).toList();

Thanks in advance!

you can create a other one dimension list and search from it and then base on index display data whatever you want to show. — Viren V Varasadiya
– Viren V Varasadiya, Commented May 7, 2020 at 7:53

camillo777 · Accepted Answer · 2020-05-08 05:44:44Z

2

Hello check this solution if it is ok:

final posts = [ 
  ["My First Post", "myPostId"], 
  ["My SecondPost", "myPostId2"],
];

void main() {
  List suggestions = List();
  posts.forEach((postList){
    if(postList[0].contains("First")) 
      suggestions.add(postList);

  });

  suggestions.forEach((sugg)=>print("Found ID: ${sugg[1]}"));
}

edited May 8, 2020 at 5:44

answered May 7, 2020 at 8:11

camillo777

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2 Comments

Fathah Cr Over a year ago

final suggestion = query.isEmpty?courseNameList:courseNameListLower .where((test)=>test.contains(query.toLowerCase())).toList();

This is my actual code. I need to assign those results into list (suggestion), instead .

camillo777 Over a year ago

@FathahKodag I have modified my answer to return a List; hope it helps!

mezoni · Accepted Answer · 2020-05-07 08:11:02Z

1

void main() {
  final result = posts.any((e) => e.any((e) => e.contains('First')));
  print(result);
}

final posts = [
  ["My First Post", "myPostId"],
  ["My SecondPost", "myPostId2"]
];

answered May 7, 2020 at 8:11

mezoni

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5 Comments

Fathah Cr Over a year ago

I need to assign those results to another list. As any() is a bool I cannot get the result, instead, it returns true/false

Fathah Cr Over a year ago

Please check the question. I have added some more code.

mezoni Over a year ago

This was the answer to your main question Check if inner lists contain some string value in Flutter. Documentation: api.dart.dev/stable/2.8.1/dart-core/Iterable/any.html Checks whether any element of this iterable satisfies test.. What exactly does not suit you?

mezoni Over a year ago

Ask a new question on StackOverflow. what's the way to get from the inner lists.

Fathah Cr Over a year ago

Tnx for trying.

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