How to request a random row in SQL?

How to request a random row in SQL?

How can I request a random row (or as close to truly random as is possible) in pure SQL? 1:See this post: SQL to Select a random row from a database table. It goes through methods for doing this in MySQL, PostgreSQL, Microsoft SQL Server

Which is the Spring equivalent for the CDI @Produces annotation?

Which is the Spring equivalent for the CDI @Produces annotation?

When I was working with CDI, I could use the @Produces annotation to create a producer method to be called to choose which bean that implemented an interface would be injected by the @Inject annotation .Now I am working with Spring, but I d

Vertically centering button using css

Vertically centering button using css

I am trying to make a simple input button center-align within a table cell.My markup is: XXXXXXXXX YYYYYYYY And may be viewed here:http://jsfiddle.net/tP4sD/I have done a table version showing you the la

Disable the submit button after clicking and enable it back again after a few seconds

Disable the submit button after clicking and enable it back again after a few seconds

I'm using jquery $.post when submitting a form. I want to disable the button for like 5 seconds after it has been clicked to avoid multiple submission of the form.here's what I've done for now:$('#btn').click(function(){ $.post(base_url

Finding the hash value of a row in postgresql

Finding the hash value of a row in postgresql

Is there a way to get the hash code of a row in postgresql? I need to export some data only if there is some changes in the data after the last export, the last exported data rows can be stored in a table, the when the again I need to expo

Return elements of list as independent objects in global environment

Return elements of list as independent objects in global environment

I have a list, and would like to break the elements of the list into seperate objects in the global environment. For example, I would like the list: obj to be three seperate objects a, b, and c. I tried to achieve this with: lapply(obj, FUN

using sql count in a case statement

using sql count in a case statement

I have a table and i need to present the output in the following fashion.tb_a:col1 | reg_id | rsp_ind Count of rows with rsp_ind = 0 as 'New' and 1 as 'Accepted'The output should be NEW | Accepted9 | 10I tried using the following query.

How do I select every other div class element using just CSS (no js)

How do I select every other div class element using just CSS (no js)

Thank you kindly for your responses in advance.I know how to do this using javascript and php, but I am trying to learn how/if it is possible to do this using just css.I have a container which holds many items. Each item has a picture, and

MsTest ClassInitialize and Inheritance

MsTest ClassInitialize and Inheritance

I have a base class for my tests which is composed in the following way:[TestClass]public abstract class MyBaseTest{ protected static string myField = ""; [ClassInitialize] public static void ClassInitialize(TestContext context) {

How to start/stop a monitoring Delphi thread on demand?

How to start/stop a monitoring Delphi thread on demand?

I've been looking for a way to monitor for specific registry changes in Delphi. Found a solution at about.com:procedure TRegMonitorThread.Execute;begin InitThread; // method omitted here while not Terminated do begin if WaitForSingleO

except-clause deletes local variable

except-clause deletes local variable

exc = Nonetry: raise Exceptionexcept Exception as exc: pass# ...print(exc) NameError: name 'exc' is not definedThis used to work in Python2. Why was it changed this way? If I could at least re-assign to exc, similar to class-level at

Nativescript background-image fullscreen

Nativescript background-image fullscreen

I want to create app in Nativescript with fullscreen image on page. I have to use background-image: url('~/images/background.jpg');. But how to make it full screen.Thanks for your help 1:You need to use the NativeScript supported CSS pro

pandas: Filling missing values within a group

pandas: Filling missing values within a group

I have some data from an experiment, and within each trial there are some single values, surrounded by NA's, that I want to fill out to the entire trial:df = pd.DataFrame({'trial': [1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3], 'cs_name': [np.na

Pausing readline in Node.js

Pausing readline in Node.js

Consider the code below ... I am trying to pause the stream after reading the first 5 lines:var fs = require('fs');var readline = require('readline');var stream = require('stream');var numlines = 0;var instream = fs.c

How to run specific java code on Tomcat start or on application deploy? [duplicate]

How to run specific java code on Tomcat start or on application deploy? [duplicate]

Possible Duplicate: tomcat auto start servlet How do I load a java class (not a servlet) when the tomcat server starts I have web application running on Tomcat server. I want to run specific code in my application once when Tomcat starts

LibGDX - How to integrate AdMob for both iOS and Android

LibGDX - How to integrate AdMob for both iOS and Android

I am following this tutorial for AdMob integration through LibGDX, but it shows for Android only. I am just wondering if someone has an example how to achieve same integration including iOS? Also, how can I use banners instead of full scree

Tomcat Webapp on port 80 [duplicate]

Tomcat Webapp on port 80 [duplicate]

This question already has an answer here: How to change the port of Tomcat from 8080 to 80? 15 answers I have a webapp on my tomcat server like this:my

How to update an “array of objects” with Firestore?

How to update an “array of objects” with Firestore?

I'm currently trying Firestore, and I'm stuck at something very simple: "updating an array (aka a subdocument)".My DB structure is super simple. For example:proprietary: "John Doe"sharedWith: [ {who: "[email protected]", when:timestamp}

Why are self-executing anonymous functions used in Javascript Module pattern?

Why are self-executing anonymous functions used in Javascript Module pattern?

In the module pattern in JavaScript "Immediately-Invoked Function Expressions" (also known as self-executing anonymous functions) are used as self executing functions that return an object. How can a self-executing function hide private var

text-align: justify and images

text-align: justify and images

I have a list of images (not in a list, but could be if that might solve the problem) that I want to fill the whole width of a div. I've tried the code at the bottom, and while it does justify any text in the p tag it doesn't do the same fo

How to specify name attribute in h:inputText?

How to specify name attribute in h:inputText?

I need to render h:inputText as following html output : But h:inputText renders the name attribute same as client id of the component. I want to specify the name attribute myself, instead of putting client id in that, so that the input f

AVFoundation Image orientation off by 90 degrees in the preview but fine in Camera roll

AVFoundation Image orientation off by 90 degrees in the preview but fine in Camera roll

Something really strange is happening, I am trying to capture an image using AVFoundation, the Camera roll image seems just fine, but the image preview has the image rotated by 90 degrees.This is the code I am using to capture an imageAVCap

Set color for extra page parts visible during rubber band scroll

Set color for extra page parts visible during rubber band scroll

At least when you scroll over the edge on mac, you see the page moving down and leaving a plain color behind it. Iv'e figured out the you can change the color by setting the background color of the body. But is there any other approach to i

Scala - Currying and default arguments

Scala - Currying and default arguments

I have a function with two parameter lists that I am trying to partially apply and use with currying. The second parameter list contains arguments that all have default values (but not implicit). Something like this: def test(a: Int)(b: Int

How to create a shortcut to launch an App with admin privileges from the cmd-line?

How to create a shortcut to launch an App with admin privileges from the cmd-line?

I have an installer (Inno-Setup) that installs my application to a path defined by the user. At the end of the install routine i want to create a shortcut that starts the application with admin privileges. The solution should work on all wi