How to check string existance in string arraylist in flutter?

Question

RxList<String> selectedMemberList = <String>[].obs;
selectedMemberList = [180,160,150]

I want to display text in red color if ID contains in selectedMemberList.

So, I simply called,

if selectedMemberList.contains('180'){
text in red color
}else{
text in black color}

but, I got text in black color every time. That means ID doesnt matched. How do I match member ID to given selectedMemberList.

MANISH · Accepted Answer · 2022-10-08 18:09:03Z

1

if your items are in a single string separated by a comma, first convert that into a list like this :

String collectedIds = "180,160,150";
final split = tagName.split(',');
final Map<int, String>  selectedMemberList= {
  for (int i = 0; i < split.length; i++)
    i: split[i]
};

and now you can check the condition :

if selectedMemberList.contains('180'){
text in red color
}else{
text in black color}

Hope this will help you.

edited Oct 8, 2022 at 18:09

answered Oct 8, 2022 at 6:05

MANISH

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2 Comments

Vrusti Patel Over a year ago

String collectedIds = 180,160,150; selectedMemberList.add(collectedIds); So, Problem is here, comma separated strings are not converting in list as an Item. here is total 3 IDs in string when i converting in list, selectedMemberList length is only one instead of 3. can you help me in conversion of string to stringlist ?

Vrusti Patel Over a year ago

I did this way. an it is solved

ShinMyth · Accepted Answer · 2022-10-08 06:34:01Z

0

Here is a cleaner way on checking if value exist on a list.

RxList<String> selectedMemberList = <String>[].obs;
selectedMemberList = ["160","180","150"];
  
  
if (selectedMemberList.where((item) => item == "180").isNotEmpty){
  text in red color
} else {
  text in black color
}

answered Oct 8, 2022 at 6:34

ShinMyth

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