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Index › Programming Questions & Help › Syntax Questions › fill arrays with patterns
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fill arrays with patterns (Read 481 times)
sebastiano
fill arrays with patterns
Jun 17th, 2009, 9:57am  
hi i need to create an array with numbers , i need  the array to  have 2 zero numbers after 2 random numbers   . how can i do this? heres an example of what i need: the first 2 numbers are random , then the following 2 numbers are zero, then the following 2 numbers are random, then the following 2 numbers are zero, etc.

I need that the array can be scalable, any idea of how to doing this?




       numbers[0] = 3;        
       numbers[1] = 7;  
       numbers[2] = 0;  
       numbers[3] = 0;  
       numbers[4] = 2;    
       numbers[5] = 12;
       numbers[6] = 0;  
       numbers[7] = 0;  
       numbers[8] = 4;    
       numbers[9] = 6;
       numbers[10] = 0;
       numbers[11] = 0;
       numbers[12] = 2;
       numbers[13] = 8;
       numbers[14] = 0;
       numbers[15] = 0;
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jeffg
Re: fill arrays with patterns
Reply #1 - Jun 17th, 2009, 12:07pm  
Here is what an array would look like, if you don't know what size to make it up front, you could use an ArrayList.
Code:

int[] arrayname = new int[16]; //set size of array to 16 (needs to be increment of 4 since we set 4 values at a time)

  for (int i = 0; i < arrayname.length; i++) {
    arrayname[i] = (int)random(0,20); //random integer between 0-20
    i++;
    arrayname[i] = (int)random(0,20); //random integer between 0-20
    i++;
    arrayname[i] = 0;
    i++;
    arrayname[i] = 0; 
  }

  for (int i = 0; i < arrayname.length; i++) {
    println(arrayname[i]);
  }
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sebastiano
Re: fill arrays with patterns
Reply #2 - Jun 17th, 2009, 12:26pm  
cool thanks it works perfect, but is it possible to do the same with % ?
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PhiLho 
Re: fill arrays with patterns
Reply #3 - Jun 17th, 2009, 12:43pm  
Smells like homework... but I will bite.
Code:
  for (int i = 0; i < arrayname.length; i++) {
    if (i % 4 < 2)
    {
	arrayname[i] = (int)random(0,20); //random integer between 0-20
    }
  }
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