lexicographical_order 1.0.1

A string generator that helps to implement a lexicographical order.

Lexicographical Order

A string generator that helps to implement a lexicographical order.

Installing

dependencies:
  lexicographical_order: 

import 'package:lexicographical_order/lexicographical_order.dart';

Usage

• Get the string between two strings in a lexicographical order.

  final mid = between(prev: 'B', next: 'D');
  final list = [mid, 'D', 'B'];
  assert(listEqauls(list..sort(), ['B', mid, 'D']);
  

  • practice

    class Todo {
      final int id;
      String title;
      bool completed
      String _orderKey;
          
      void reorderBetween(Todo? prev, Todo? next) {
    	_orderKey = between(
          prev: prev?._orderKey, 
          next: next?._orderKey,
        );
      }
          
      Todo(/* omitted */);
    }
    

• Generates strings that satisfy the minimum average string length and lexicographic order.

  const stringCount = 100;
  List<String> orderKeys = generateOrderKeys(stringCount).toList(); 
  

Caution

• Don't use 'A' as first order key

  In the lexicographical order, no character can precede 'A'.