flutter dart How to list all values of a specific key value in a map

Question

I want to get the value of 'id' of map as list.

Expected output: [1,35, 93, 82, 28]

[{'id': 1, 'name':'flutter', 'title':'dart'},

{'id': 35, 'name':'flutter', 'title':'dart'},

{'id': 93, 'name':'flutter', 'title':'dart'},
  
{'id': 82, 'name':'flutter', 'title':'dart'},

{'id': 28, 'name':'flutter', 'title':'dart'},
];

Mattia · Accepted Answer · 2021-07-10 14:18:15Z

2

You can use .map to iterate through each object and get the value you want:

void main() {
  final list = [
    {'id': 1, 'name': 'flutter', 'title': 'dart'},
    {'id': 35, 'name': 'flutter', 'title': 'dart'},
    {'id': 93, 'name': 'flutter', 'title': 'dart'},
    {'id': 82, 'name': 'flutter', 'title': 'dart'},
    {'id': 28, 'name': 'flutter', 'title': 'dart'},
  ];

  final idList = list.map((e) => e['id']).toList(); // [1, 35, 93, 82, 28]
}

answered Jul 10, 2021 at 14:18

Mattia

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2 Comments

user16304169 Over a year ago

The answer was helpful. Thank you :)

Mattia Over a year ago

@lhyojin0821 if it solved your issue please mark it as accepted

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