CODEWITHSUNDEEP
flutterdart
joisberg
joisberg

Reputation: 187

Flutter convert string in list double

I have a response from REST API that return this:

var time = [{"duration":"00m 25s"},{"duration":"12m 08s"},{"duration":"02m 09s"},{"duration":"01m 25s"}, {"duration":"02m 05s"}]

I want to transform this list in:

var newTime = [0.25, 12.08, 2.09, 1.25, 2.05]

Upvotes: 0

Views: 1428

Answers (3)

Ziyad Mansy
Ziyad Mansy

Reputation: 437

You can do it as follows:

 var time = [{"duration":"00m 25s"},{"duration":"12m 08s"},{"duration":"02m 09s"},{"duration":"01m 25s"}, {"duration":"02m 05s"}];
  
  var newList = time.map((time) {
    String clippedMinutes; // will get the minutes part
    String clippedSeconds; //// will get the seconds part
    String fullTime = time['duration']; // full time part from each Map
    final splittedTimeList = fullTime.split(' '); // splits the full time
    clippedMinutes = splittedTimeList[0];
    clippedSeconds = splittedTimeList[1];
    return double.parse('${clippedMinutes.substring(0, clippedMinutes.length - 1)}.${clippedSeconds.substring(0, clippedSeconds.length - 1)}');
  }).toList();
  
  print(newList); // output: [0.25, 12.08, 2.09, 1.25, 2.05]

If it helped you don't forget to upvote

Upvotes: 1

Ουιλιαμ Αρκευα
Ουιλιαμ Αρκευα

Reputation: 6287

My contribution:

main(List<String> args) {
  final times = [{"duration":"00m 25s"},{"duration":"12m 08s"},{"duration":"02m 09s"},{"duration":"01m 25s"}, {"duration":"02m 05s"}];
  var regExp = RegExp(r'(\d\d)m (\d\d)s');
  var newData = times.map((e) => double.parse(e['duration'].replaceAllMapped(regExp, (m) => '${m[1]}.${m[2]}')));

  print(newData);
}

Result:

(0.25, 12.08, 2.09, 1.25, 2.05)

Upvotes: 1

Tirth Patel
Tirth Patel

Reputation: 5756

You can do string manipulation using splitting string using some delimiter like space and applying transformation via map.

void main() {
  var time = [
    {"duration": "00m 25s"},
    {"duration": "12m 08s"},
    {"duration": "02m 09s"},
    {"duration": "01m 25s"},
    {"duration": "02m 05s"}
  ];
  time.map((e) {
    final val = e['duration'].split(' '); // split by space

    final result = val[0].substring(0, val[0].length - 1) + '.' +
        val[1].substring(0, val[1].length - 1); // concat number by removing unit suffix

    return double.tryParse(result); // parsing to double.
  }).forEach((e) => print(e)); // 0.25, 12.08, 2.09, 1.25, 2.05
}

Upvotes: 3

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