Having issue while removing duplicate items from a list in dart

Question

I want to remove duplicate items but didnt found any method

List items = data
            .where((test) =>
                test["title"].toLowerCase().contains(query.toLowerCase()) ||
                test["ingredients"].toLowerCase().contains(query.toLowerCase()) ||
                test["keywords"].toLowerCase().contains(query.toLowerCase()) ||
                test["author"].toLowerCase().contains(query.toLowerCase())).toSet()
            .toList();

here is the output with duplication

[{ingredients:plus extra for rolling out (we like Wrights), keywords: Bread, author: Good Food, title: Spicy pizza, recipe_ID: 28}, {ingredients: plus extra for rolling out (we like Wrights), keywords: Indian, author: Good Food, title: Spicy pizza, recipe_ID: 28}, {ingredients:plus extra for rolling out (we like Wrights), keywords: Midweek, author: Good Food, title: Spicy pizza, recipe_ID: 28}]

so i want to remove these duplicate items,is there any method like distinct?

What type of object are the results? Have you implemented `==` and `hashcode`? — julemand101, Apr 08 '20 at 07:29
yes i have tried to use this in my scenario but got no luck. Actually i am dealing with a lot of JSONs and HTTP requests so its very difficult to remove duplicate data from all of them. — Sanwal Ijaz, Apr 08 '20 at 12:11
Please let me know if there is any library Like "dartx" or any extension like distinct() is available for this purpose i'll be thankful to you. — Sanwal Ijaz, Apr 08 '20 at 12:17

score 0 · Answer 1 · edited Jun 20 '20 at 09:12

0

Check this SO thread. For your case:

var items = [
  test["title"],
  test["ingredients"],
  test["keywords"],
  test["author"]
]

var distinctItems = items.toSet().toList();

NOTE: Above I have created the list statically for simplicity. You should created it dynamically. If you dont want to distinguish between small and capital letters, that also you will have to take care.

edited Jun 20 '20 at 09:12

Community

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answered Apr 08 '20 at 10:06

Sisir

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no, not the same code because i have different scenario i tried it with changings – Sanwal Ijaz Apr 08 '20 at 13:09

Having issue while removing duplicate items from a list in dart

1 Answers1