non repeating random number generator

Problem Description:Random generation of k non-repeating random numbers (or generating a sequence of 0 to k-1 in random order)Algorithm:Rand does not directly produce a value, but instead produces subscripts, which can be repeated, but to ensure that the array is non-

This article mainly introduces PHP to obtain a certain range of n non-repeating random number method, through the range function to create a specified range of arrays and shuffle array random ordering, and using Array_slice to extract the array to achieve this function, very

Methods for generating non-repeating random numbers in. Net //gets count of integers that are not greater than maxnumber, and all integers are not duplicated. Of course, count must be less than or equal to maxnumberstaticlist Reference: Generating non-repeating

This article describes the implementation code for Python to get random, non-repeating points of time over a specified period of time Scenario 1: Take a random time between N 07:30:00-09:30:33. Here's My Code: #2016 -12-10 7:06:29 Codegayimport randomst = "07:30:00" et = "09:30:33" def time2seconds (t): h,m,s = T.s

$str =uniqid(mt_rand(),1);echo ‘sha1:‘,sha1($str);echo ‘;echo‘MD5:　‘,md5($str);Using the Uniqid function, with the Mt_rand random function, the last hash is worth the final unique value.But in the test, the uniqueness of the random number is found to have the same part, about 11 bits of the same (but no major obstacle)Second method: GUIDechosprintf(‘%04X%04X-%04X

/*Version: 1.0Author: hellogiserBlog: http://www.cnblogs.com/hellogiserDate: 2014/6/3*/// Use rand5 to generate rand7Int Rand7 (){Int x;Do{X = Rand5 () * 5 + Rand5 ();}While (x> = 21 );Return x % 7;} (4) rand7 generate rand10 C ++ Code 1234567891011121314151617 /*Version: 1.0Author: hellogiserBlog: http://www.cnblogs.com/hellogiserDate: 2014/6/3*/// Use rand7 to generate rand10Int Rand10 (){Int x;Do{X = Rand7 () * 7 + Rand7 ();}While (x> = 40 );Return x % 10;} (

Public stringRadomnumarray () {Random R=NewRandom (); intA =0; int[] num =New int[6]; stringText =""; for(inti =0; I 6; i++) {//loops generate 6 of numbersA = R.next (0, About);//randomly generate numbers from 0 to 99Num[i] =A; for(intK =0; K ) {//iterating through an array if(Num[i] = = Num[k] i! =k) {//Find duplicates randomly regenerate random numbersNum[i]

import java.util.Arrays;classInput100 { Public Static voidMain (string[] args) {int[] arr =New int[ -]; arr[0]=(int) (Math.random () * -+1); Boolean flag=true; A: while(flag) { for(inti =0; I ){ for(intj =0; J ) { if(Arr[j] = =Arr[i]) {Arr[i]=(int) (Math.random () * -+1); ContinueA; } }} flag=false; } arrays.sort (arr); for(inti =0; i ) {System. out. Print (arr[i]+" "); } }} There is another way in the cycle phase.import java.util

Direct Sticker Code:Native JS implementation of a recurring watch games (ii)-----------generate random non-repeating numbers

Copy Code code as follows: Generate a table instance of a non-repeating random sequence private static list{ listint num = 0; Random rnd = new Random (); for (int i = 0; i { Todo { num = rnd. Next (010000, 1000000); while (list. Contains (num));// List. ADD (nu

A question about super-long, non-repeating random sequence

var strcode= ' Zxcvbnmasdfghjklopiuytrewqawedrftgyhujik '; var str= '; for (var i=0;i) { var rand=math.round (Math.random () *61); if (Str.indexof (Strcode.charat (Rand)) ==-1) { str+ =Strcode.charat (rand); } Else { i--; }} Console.log (str);Article from: http://www.qdfuns.com/notes/42231/cfc6d7c792d485de06587c532587a08d.htmljs-get 4 Non-repeating

PHP generates unique number 36 binary non-repeating numberThe PHP implementation generates a unique number, using the 10 binary conversion 36 binary to get the unique number of 6000多万个, the number of digits is 10 bits.When a large

The principle is very simple, write a function first, generate 0-z one of the 36 characters. Each call to the GetOptions () method generates a character that is stored as follows: array[0] = 0, array[1] = 1, ..., array[35] = Z. Array ([0] = 0 [1] = 1 [2] = 2 [3] = 3 [4] = 4 [5] = 5 [6] = 6 [7] = 7 [8] = 8 [9] = Gt 9 [Ten] = a [one] = b [[j] = c [+] + d [+] = e [[j] = f [+] = g [+] = h [+] = I [19 ] = J [+] + k [+] = l [P] = m [P] = n [+] = o [+] = p [+] = q [+] = R T s [+] [+] = [+] = u [+] =

Copy Code code as follows: Gets the random number in an array Hf. Math.randomnumbers is a prefix that can be defined by itself, mainly looking at logical code Hf. Math.randomnumbers = function (Startnum, Endnum, Count, repeat) { var ret = []; if (repeat) { for (var i = 0; i Ret[i] = HF. Math.random (Startnum, endnum); } return ret; } var tmp = []; var i = 0; for (var s = startnum s tmp[i++]

defined as 0x7fff, that is, 32767. In the recursive formula of the Rand () function, the m value is 32767. A pseudo-random number is generated by the linear coremainder method, which roughly conforms to the even distribution. According to the central limit theorem, any distributed noise can become Gaussian noise by repeating addition. Function prototype 1. The C

: 0J1VC.Then, we add the city number and check code, the city number is already defined, check code through a certain algorithm obtained, in this case, we use a simple algorithm: the first three city number and five-digit card number for MD5 encryption, and then take the MD5 value of the first 2 bits as a check code, T

Random numbers are useful for Web applications, WAP or mobile applications. In recent small projects, I often need to deal with random numbers or random arrays. Therefore, I would like to summarize several common methods for generating non-repeated random numbers in PHP (ps:

T: There are 1, 2, 3, 4 digits, how many different and no repetition of the number of three digits? Print it out?#include This article is from the "sunshine225" blog, make sure to keep this source http://10707460.blog.51cto.com/10697460/1752692There are 1, 2, 3, 4 digits, which can make up the number of different and non-repe