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• SQL Server stored procedure to generate random passwords

  SQL Server is used to support many applications and one such feature of most applications is the storage of passwords. Sometimes there is a need to reset a password using a temporary password or generate a random password for a new user. In this tip I cover a simple stored procedure to generate random passwords that can be incorporated into your…

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• SQL: select random row from table where the ID of the row isn't in another table?

  - by johnrl

  I've been looking at fast ways to select a random row from a table and have found the following site: http://74.125.77.132/search?q=cache:http://jan.kneschke.de/projects/mysql/order-by-rand/&hl=en&strip=1 What I want to do is to select a random url from my table 'urls' that I DON'T have in my other table 'urlinfo'.The query I am using now…

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• How can I generate a random human-readable colour from a seed? C#

  - by SLC

  Got a logfile, and it has all kinds of text in it. Currently it is just displayed as one colour, and each entry says something like: Log from section 1: Some text here Log from section 125: Some text here Log from section 17: Some text here Log from section 1: Some text here Log from section 125: Some text here Log from section 1: Some text…

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• How do I generate (and label) a random integer with python 3.2?

  - by An hero

  Okay, so I'm admittedly a newbie to programming, but I can't determine how to get python v3.2 to generate a random positive integer between parameters I've given it. Just so you can understand the context, I'm trying to create a guessing-game where the user inputs parameters (say 1 to 50), and the computer generates a random number between the…

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• How to generate a random BigInteger value in Java?

  - by Bill the Lizard

  I need to generate arbitrarily large random integers in the range 0 (inclusive) to n (exclusive). My initial thought was to call nextDouble and multiply by n, but once n gets to be larger than 253, the results would no longer be uniformly distributed. BigInteger has the following constructor available: public BigInteger(int numBits, Random…

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• How to generate distinct random numbers per distinct threads in .NET?

  - by mark

  Dear ladies and sirs. I have to generate 19 bit random numbers. However, there is a constraint - two threads may not generate the same random number when running certain code. The simplest solution is lock the entire code. However, I would like to know if there is a non locking solution. I thought, I can incorporate ManagedThreadId within…

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• How to write simple code using TDD [migrated]

  - by adeel41

  Me and my colleagues do a small TDD-Kata practice everyday for 30 minutes. For reference this is the link for the excercise http://osherove.com/tdd-kata-1/ The objective is to write better code using TDD. This is my code which I've written public class Calculator { public int Add( string numbers ) { const string…

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• Random number Generator in C#

  - by Sunil

  Why do i need to create an instance of Random class, if i want to create a random number between 1 and 100 ....like Random rand = new Random(); rand.Next(1,100); Is there any static function of Random class to do the same? like... Random.Next(1,100); I don't want to create an instance unnecessarily

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• ZFS with L2ARC (SSD) slower for random seeks than without L2ARC

  - by Florian Kruse

  I am currently testing ZFS (Opensolaris 2009.06) in an older fileserver to evaluate its use for our needs. Our current setup is as follows: Dual core (2,4 GHz) with 4 GB RAM 3x SATA controller with 11 HDDs (250 GB) and one SSD (OCZ Vertex 2 100 GB) We want to evaluate the use of a L2ARC, so the current ZPOOL is: $ zpool status…

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• Java: How to check the random letters from a-z, out of 10 letters minimum 2 letter should be a vowel

  - by kalandar

  I am writing a program to validate the following scenarios: Scenario 1: I am using the Random class from java.util. The random class will generate 10 letters from a-z and within 10 letter, minimum 2 letters must be a vowels. Scenario 2: When the player 1 and player 2 form a word from A-Z, he will score some points. There will…

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• one 16K random read I/O issues 2 scsi I/O (16K and 4K) requests in linux

  - by hiroyuki

  I noticed weird issue when benchmarking random read I/O for files in linux (2.6.18). The Benchmarking program is my own program and it simply keeps reading 16KB of a file from a random offset. I traced I/O behavior at system call level and scsi level by systemtap and I noticed that one 16KB sysread issues 2 scsi I/Os as…

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• Random Map Generation in Java

  - by Thomas Owers

  I'm starting/started a 2D tilemap RPG game in Java and I want to implement random map generation. I have a list of different tiles, (dirt/sand/stone/grass/gravel etc) along with water tiles and path tiles, the problem I have is that I have no idea where to start on generating a map randomly. It would need to have terrain…

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• Random map generation

  - by Thomas Owers

  I'm starting/started a 2D tilemap RPG game in Java and I want to implement random map generation. I have a list of different tiles, (dirt/sand/stone/grass/gravel etc) along with water tiles and path tiles, the problem I have is that I have no idea where to start on generating a map randomly. It would need to have terrain…

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• Why does Windows make random "device connect" and "device disconnect" sounds?

  - by Steve Elmer

  Hello, I've been noticing this since Windows Vista. I see it on Windows 7, now, as well. In any case throughout the day I notice that my computer makes apparently random device-connect and/or device-disconnect ("boink") sounds. I suppose it is the same sound you hear when connecting or disconnecting a USB device such…

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• Why does Windows make random "device connect" and "device disconnect" sounds?

  - by Steve Elmer

  Hello, I've been noticing this since Windows Vista. I see it on Windows 7, now, as well. In any case throughout the day I notice that my computer makes apparently random device-connect and/or device-disconnect ("boink") sounds. I suppose it is the same sound you hear when connecting or disconnecting a USB device such…

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• best way to pick a random subset from a collection?

  - by Tom

  I have a set of objects in a Vector from which I'd like to select a random subset (e.g. 100 items coming back; pick 5 randomly). In my first (very hasty) pass I did an extremely simple and perhaps overly clever solution: Vector itemsVector = getItems(); Collections.shuffle(itemsVector); itemsVector.setSize(5); While…

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• How to assign each series of values one shape in iWork '09 Numbers?

  - by Le Quoc Viet

  How to assign each series of values one shape in iWork '09 Numbers? Currently all series are forced to have the same shape, which makes them hard to distinguish on black & white prints. Thanks in advance!

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• How to interchange a column and row in a table (Transpose) in iWork Numbers?

  - by Saneef

  I want to transpose a table (interchange rows to columns and vice versa). How to do that in iWork Numbers.

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• how to generate random numbers under OpenWRT?

  - by user62367

  With a "normal" (i mean "full") linux distro, it works just fine: sleep $(echo "$[ ($RANDOM % 10 ) ]") ok, it waits for about 0-9 sec but under OpenWRT [not using bash, rather "ash"]: $ sleep $(echo "$[ ($RANDOM % 9 ) ]") sleep: invalid number '$[' $ and why: $ echo "$[ ($RANDOM % 9 ) ]" $[ ( % 9 ) ] $ So does…

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• Need ideas for an algorithm to draw irregular blotchy shapes

  - by Yttermayn

  I'm looking to draw irregular shapes on an x,y grid, and I'd like to come up with a simple, fast method if possible. My only idea so far is to draw a bunch of circles of random sizes very near each other, but at a random distance apart from a more or less central coordinate, then fill in any blank spaces. I realize…

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• SQL to select random mix of rows fairly [migrated]

  - by Matt Sieker

  Here's my problem: I have a set of tables in a database populated with data from a client that contains product information. In addition to the basic product information, there is also information about the manufacturer, and categories for those products (a product can be in one or more categories). These categories…

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• Drawing random smooth lines contained in a square [migrated]

  - by Doug Mercer

  I'm trying to write a matlab function that creates random, smooth trajectories in a square of finite side length. Here is my current attempt at such a procedure: function [] = drawroutes( SideLength, v, t) %DRAWROUTES Summary of this function goes here % Detailed explanation goes here %Some parameters intended…

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• Grab a random number of bytes from a file with bash?

  - by GeoffreyF67

  I have a file of 256MB. I'd like to retrieve a random amount of data from this file and copy it to another file. Is there a way to do this in bash or some other way? G-Man Edit: choose a random number between 1 and 256 then copy that number of mb from one file to another.

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• Is there functionality to generate a random character in Java?

  - by Chris

  Does Java have any functionality to generate random characters or strings? Or must one simply pick a random integer and convert that integer's ascii code to a character?

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• How do i know if this is random enough?

  - by David

  I wrote a program in java that rolls a die and records the total number of times each value 1-6 is rolled. I rolled 6 Million times. Here's the distribution: #of 0's: 0 #of 1's: 1000068 #of 2's: 999375 #of 3's: 999525 #of 4's: 1001486 #of 5's: 1000059 #of 6's: 999487 (0 wasn't an option.) Is this distribution…

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