how to compare two values from a string of keys/values in flutter?

Question

Hello I try to detect if I have same value between two keys in a String

I have a format like this

[
{array: id: idX, vote: X, description: textX}, 
{array: id: idX, vote: X, description: textX}
]

I would found a solution to determine the case there are best vote and case there are equal vote

case 1 there is a winner:

[
{array: id: id1, vote: 2, description: text1}, 
{array: id: id2, vote: 1, description: text2}
]

id1 = win => display text1

case 2 there is no winner:

[
{array: id: id1, vote: 2, description: text1}, 
{array: id: id2, vote: 2, description: text2}
]

id 1 & 2 = equal => wait message

Kartik Patel · Accepted Answer · 2021-06-30 12:49:54Z

1

What is the data type of your input? You mentioned it as String but I can see it is list of maps.

// your data
List<Map<String, dynamic>> data = [];

// here assuming vote will be always greater than 0
// therefore setting maxVote = -1
int maxVote = -1;
String displayText = "";

// starting from second element
for(int i=1; i< data.length; i++){
  if(data[i]['vote'] > data[i-1]['vote']){
    maxVote = data[i]['vote'];
    displayText = data[i]['description'];
  }
  if(data[i]['vote'] < data[i-1]['vote']){
    maxVote = data[i-1]['vote'];
    displayText = data[i-1]['description'];
  }
}

if(maxVote == -1){
  // all votes where equal
  print("wait message");
}else{
  print(displayText);
}

answered Jun 30, 2021 at 12:49

Kartik Patel

6275 silver badges12 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Nitneuq Over a year ago

thank you I will try, it's a exactly final allData = querySnapshot.docs.map((doc) => doc.data()).toList();

Collectives™ on Stack Overflow

how to compare two values from a string of keys/values in flutter?

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related