DZone Snippets: unique code

SPLIT-UNIQUE - split a block into unique and duplicate values

gregg.irwin (Gregg Irwin) — Wed, 01 Nov 2006 21:35:34 GMT



    split-unique: func [block [any-block!] /local uniq dupe dest] [

        uniq: copy []

        dupe: copy []

        foreach item block [

            dest: either find/only uniq item [dupe] [uniq]

            append/only dest item

        ]

        reduce [uniq dupe]

    ]

C# & Databases - Creating a unique identifer

Ozymandias () — Thu, 11 May 2006 00:40:13 GMT

Creating a new GUID in C# is not as straightforward as one would think. Calling the constructor of System.Guid() will produce a GUID of all zeroes. Using System.Guid.NewGuid() will produce the desired effect of a new, unique identifier.



// produces a "blank" GUID: '00000000-0000-0000-0000-000000000000'

System.Guid blankGuid = new System.Guid(); 



// produces a new, unique GUID: '96d36892-6eed-400c-91f8-a194f3522fae'

System.Guid desiredGuid = System.Guid.NewGuid();

unique random array

mornlee (mornlee) — Thu, 15 Dec 2005 12:01:32 GMT

// æ— é‡?å¤?éš?æœºæ•°ç»„



import java.util.Random;

public class Util

{

 private static Random rd = null;

 

  public static int[] random(int[] src)

 {

    if(src == null){

   return null; 

  }

  

  rd = new Random();

   int[] tmp = new int[src.length];

  

  int num = src.length;

  

 

  int index;



  for(int i = 0;i < src.length;i++)

  {

  

   index = Math.abs(rd.nextInt()) % num;

    tmp[i] = src[index];

      src[index] = src[num - 1];

      num--;

  }

  return tmp;

 }

 

 public static void main(String[] args)

 {

  int[] test = {1,2,3,4,5,6,7,8,9};

  int a[] = random(test);

  

  for(int i = 0;i < a.length;i++){

   System.out.println(a[i]); 

  } 

 }