How to get ordinal Numbers in flutter

Question

I tried getting some help from stack and l can across this Python code

I would like to know how to convert this into dart and use it to get ordinal numbers

ordinal = lambda n: "%d%s" % (n,"tsnrhtdd"[(n//10%10!=1)*(n%10<4)*n%10::4])

also you can try with the https://pub.dev/packages/humanize – Jahidul Islam Sep 08 '21 at 08:26 — Jahidul Islam, Sep 08 '21 at 08:26

Jahidul Islam · Accepted Answer · 2021-09-08T08:42:16.260

7

Try with this

void main() {
   for(int i =1; i<=100;i++){
     print("$i${ordinal(i)}");
   }
}
String ordinal(int number) {
    if(!(number >= 1 && number <= 100)) {//here you change the range
      throw Exception('Invalid number');
    }

    if(number >= 11 && number <= 13) {
      return 'th';
    }

    switch(number % 10) {
      case 1: return 'st';
      case 2: return 'nd';
      case 3: return 'rd';
      default: return 'th';
    }
}

output: 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th ..................

edited Sep 08 '21 at 08:42

answered Sep 08 '21 at 08:13

Jahidul Islam

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Thank you for response it uses day of the month?.. is there a way to extend it. For example 111th or more. – oceanmanta Sep 08 '21 at 08:16
you can change the value range in ordinal number ` if(!(number >= 1 && number <= 100)) ` – Jahidul Islam Sep 08 '21 at 08:19
Do you even need the range check? It should work regardless, right? – Stack Underflow Dec 07 '21 at 21:36
yes, you are right – Jahidul Islam Dec 08 '21 at 04:52

score 0 · Answer 2 · answered Sep 08 '21 at 09:33

Resuable version of accepted answer.

main() {
  print(toOrdinal(3)); 
  // -> 3rd
  print(ordinalGenerator(end: 1000));
  // -> [1st, 2nd, 3rd, 4th,..., 1000th]
  print(ordinalGenerator(start: 7, end: 14));
  // -> [7th, 8th, 9th, 10th, 11st, 12nd, 13rd, 14th]
}

List ordinalGenerator({int start = 1,required int end}) {
  if (start < 1) throw Exception('Start Number Can\' be less than 1');
  if (start > end) throw Exception('Invalid Range');

  return List.generate(
    end - (start == 1 ? 0 : start - 1),
    (index) => toOrdinal(index + start),
  );
}

String toOrdinal(int number) {
  if (number < 0) throw Exception('Invalid Number');

  switch (number % 10) {
    case 1:
      return '${number}st';
    case 2:
      return '${number}nd';
    case 3:
      return '${number}rd';
    default:
      return '${number}th';
  }
}

How to get ordinal Numbers in flutter

2 Answers2