non repeating random number generator

There are 25 pieces to vote, one to vote for 16, and one to vote only once per piece. In front of a programmer stabbed blunder, forgot to put the vote in the library, there are 200 user-generated voting sequence is empty. So how would you fill this blunder?PHP/** array unique_rand (int $min, int $max, int $num) * Generate a certain number of distinct random numbers * $min and $max: Specify the range of

What is a GUID GUID (Globally unique identifier) The globally unique identifier (guid,globally unique Identifier) is a numeric identifier generated by the algorithm with a binary length of 128 bits. GUIDs are primarily used in networks or systems that have multiple nodes, multiple computers. Ideally, no computer or computer cluster will generate two identical GUIDs. The total number of GUIDs reaches 2^128 (3.4x10^38), so the prob

://www.inbreak.net/archives/349Q: Theoretically, the random number generated by the computer is pseudo-random number, so how to produce high-intensity random number?A: There are two important factors for generating high-intensity

is 7 bits :As can be seen, the string length of 7 bits, the generation of Covin ciphertext, are not duplicated , the basic can meet most of the situation, more I did not test, we are interested to test the number of bits generated when the duplication occurs. The advantage of this approach is that the longer the original string length, the resulting volume of ciphertext that will not be duplicated will be larger, and you can adjust it as needed.Howev

1 //generate non-repeating random numbers2 functioncreaterandom (num, Min, max)3 {4Let arr=[],res=[],newarr;5 for(Let i=min;i) {6 Arr.push (i);7 }8Newarr=object.assign ([],arr);9 for(Let item=0;item) {TenRes.push (Newarr.splice (Math.floor (Math.random () * arr.length), 1) [0]); One } ARes.length =num; - returnRes; -}Where num is the

IdeasSave 1-1000 integers in an array of size 1000, int nums[1000] = {,... 1000}.Use Random.nextint () to get [0,999] subscript value, that is, index = random.nextint (1000), Exchange coordinates 0 and index valueUse Random.nextint () to get [0,999] subscript value, that is, index = random.nextint (1000), Exchange coordinates 1 and index value...Use Random.nextint () to get [0,999] subscript value, that is, index = random.nextint (1000), Exchange coordinates 899 and index valueLast [0-899] saved

Defines the array that holds the generated random numbervar array=new array ();Cyclic n generation of random numbersfor (var i = 0;; i++) {Generate only 10 random numbersif (array.lengthGeneraterandom (10);}else{Break}}Iterating through a random number arrayfor (var i = 0; i

Today, we share a list of PHP cases, we learn together. use the shuffle function to generate a random number. 1 2 3 4 5 6 7 8 $arr =range (1,10);Shuffle ($arr);foreach ($arr as $values){echo $values. " ";}?> Use the Array_unique function to generate a random

Notoginseng } - theC[i] =T; + } A the for(intx1:c) { + -System.out.print (x1 + ""); $ } $ System.out.println (); - - //use Index to determine if there is the same sequence (recommended) the -String str = "";Wuyi the for(inti = 0; I ) { - Wu intt = Ran1.nextint (35); - About if(t = = 0) {//Judging if there's 0 this number $ -i--; - Continue; -

) count{ nsmutablearray *originalarr=[nsmutablearray array]; Nsmutablearray *resultarr=[nsmutablearray array]; Generate an array in order for (Nsinteger i=0; iAt this time when I first write the code, carefully may find that the definition of two arrays, in fact, not necessary, one is enough, the following is the improved code:+ (Nsarray *) Getresultfour: (nsinteger) count{ nsmutablearray *resultarr=[nsmutablearray array]; Generate an array in order for (Nsinteger i=0; iCall