//  SplittingAtoms.kt Copyright (c) Kari Laitinen

//  http://www.naturalprogramming.com

//  2023-04-29  File created.

//  This program demonstrates, how a sting can be split to
//  substrings according to a regular expression.

fun main()
{
   var atomic_text = "\n Atoms consist of protons, neutrons, and electrons."

   print( atomic_text  +  "\n" )

   var substrings_from_text = atomic_text.split( Regex( "[\n,]" ) )

   for ( substring_index  in 0 .. substrings_from_text.size - 1 )
   {
      print( "\n" + substring_index  +  ":" 
                  +  substrings_from_text[ substring_index ] )
   }

   /*
   atomic_text  =  ""

   for ( substring_index  in 0 .. substrings_from_text.size - 1 )
   {
      atomic_text  =  atomic_text  +  
                        substrings_from_text[ substring_index ]
   }
   */
   
   // The original string is recomposed so that an empty string
   // is put between the substrings.
   
   atomic_text = substrings_from_text.joinToString( "" )

   print( "\n\n"  +  atomic_text  +  "\n" )

   substrings_from_text  =  atomic_text.split( Regex( "[ ]" ) )

   for ( substring_index  in 0 .. substrings_from_text.size - 1 )
   {
      print( "\n" + substring_index  +  ":" 
                  +  substrings_from_text[ substring_index ] )
   }
   
   print( "\n\n" )
}