Programs & Examples On #Ajaxtags

java.lang.NoSuchMethodError: javax.servlet.ServletContext.getContextPath()Ljava/lang/String;

java.lang.NoSuchMethodError: javax.servlet.ServletContext.getContextPath()Ljava/lang/String;

That method was added in Servlet 2.5.

So this problem can have at least 3 causes:

  1. The servlet container does not support Servlet 2.5.
  2. The web.xml is not declared conform Servlet 2.5 or newer.
  3. The webapp's runtime classpath is littered with servlet container specific JAR files of a different servlet container make/version which does not support Servlet 2.5.

To solve it,

  1. Make sure that your servlet container supports at least Servlet 2.5. That are at least Tomcat 6, Glassfish 2, JBoss AS 4.1, etcetera. Tomcat 5.5 for example supports at highest Servlet 2.4. If you can't upgrade Tomcat, then you'd need to downgrade Spring to a Servlet 2.4 compatible version.
  2. Make sure that the root declaration of web.xml complies Servlet 2.5 (or newer, at least the highest whatever your target runtime supports). For an example, see also somewhere halfway our servlets wiki page.
  3. Make sure that you don't have any servlet container specific libraries like servlet-api.jar or j2ee.jar in /WEB-INF/lib or even worse, the JRE/lib or JRE/lib/ext. They do not belong there. This is a pretty common beginner's mistake in an attempt to circumvent compilation errors in an IDE, see also How do I import the javax.servlet API in my Eclipse project?.

Ternary operator ?: vs if...else

In C A ternary operator " ? : " is available to construct conditional expressions of the form

exp1 ? exp2:exp3

where exp1,exp2 and exp3 are expressions

for Example

        a=20;
        b=25;
        x=(a>b)?a:b;

        in the above example x value will be assigned to b;

This can be written using if..else statement as follows

            if (a>b)
             x=a;
             else
             x=b;

**Hence there is no difference between these two. This for the programmer to write easily, but for compiler both are same.*

How do I refresh a DIV content?

For div refreshing without creating div inside yours with same id, you should use this inside your function

$("#yourDiv").load(" #yourDiv > *");

Typescript input onchange event.target.value

the correct way to use in TypeScript is

  handleChange(e: React.ChangeEvent<HTMLInputElement>) {
    // No longer need to cast to any - hooray for react!
    this.setState({temperature: e.target.value});
  }

  render() {
        ...
        <input value={temperature} onChange={this.handleChange} />
        ...
    );
  }

Follow the complete class, it's better to understand:

import * as React from "react";

const scaleNames = {
  c: 'Celsius',
  f: 'Fahrenheit'
};


interface TemperatureState {
   temperature: string;
}

interface TemperatureProps {
   scale: string;

}

class TemperatureInput extends React.Component<TemperatureProps, TemperatureState> {
  constructor(props: TemperatureProps) {
    super(props);
    this.handleChange = this.handleChange.bind(this);
    this.state = {temperature: ''};
  }

  //  handleChange(e: { target: { value: string; }; }) {
  //    this.setState({temperature: e.target.value});  
  //  }


  handleChange(e: React.ChangeEvent<HTMLInputElement>) {
    // No longer need to cast to any - hooray for react!
    this.setState({temperature: e.target.value});
  }

  render() {
    const temperature = this.state.temperature;
    const scale = this.props.scale;
    return (
      <fieldset>
        <legend>Enter temperature in {scaleNames[scale]}:</legend>
        <input value={temperature} onChange={this.handleChange} />
      </fieldset>
    );
  }
}

export default TemperatureInput;

org.apache.jasper.JasperException: Unable to compile class for JSP:

This line of yours:

<%@ page import="pageNumber.*, java.util.*, java.io.*" %>

Requires an @ symbol before % like this:

<%@ page import="pageNumber.*, java.util.*, java.io.*" @%>

In bootstrap how to add borders to rows without adding up?

You can simply use the border class from bootstrap:

<div class="row border border-dark">
...
</div>

For more details visit the following link: Borders

How can I properly handle 404 in ASP.NET MVC?

Quick Answer / TL;DR

enter image description here

For the lazy people out there:

Install-Package MagicalUnicornMvcErrorToolkit -Version 1.0

Then remove this line from global.asax

GlobalFilters.Filters.Add(new HandleErrorAttribute());

And this is only for IIS7+ and IIS Express.

If you're using Cassini .. well .. um .. er.. awkward ... awkward


Long, explained answer

I know this has been answered. But the answer is REALLY SIMPLE (cheers to David Fowler and Damian Edwards for really answering this).

There is no need to do anything custom.

For ASP.NET MVC3, all the bits and pieces are there.

Step 1 -> Update your web.config in TWO spots.

<system.web>
    <customErrors mode="On" defaultRedirect="/ServerError">
      <error statusCode="404" redirect="/NotFound" />
    </customErrors>

and

<system.webServer>
    <httpErrors errorMode="Custom">
      <remove statusCode="404" subStatusCode="-1" />
      <error statusCode="404" path="/NotFound" responseMode="ExecuteURL" />
      <remove statusCode="500" subStatusCode="-1" />
      <error statusCode="500" path="/ServerError" responseMode="ExecuteURL" />
    </httpErrors>    

...
<system.webServer>
...
</system.web>

Now take careful note of the ROUTES I've decided to use. You can use anything, but my routes are

  • /NotFound <- for a 404 not found, error page.
  • /ServerError <- for any other error, include errors that happen in my code. this is a 500 Internal Server Error

See how the first section in <system.web> only has one custom entry? The statusCode="404" entry? I've only listed one status code because all other errors, including the 500 Server Error (ie. those pesky error that happens when your code has a bug and crashes the user's request) .. all the other errors are handled by the setting defaultRedirect="/ServerError" .. which says, if you are not a 404 page not found, then please goto the route /ServerError.

Ok. that's out of the way.. now to my routes listed in global.asax

Step 2 - Creating the routes in Global.asax

Here's my full route section..

public static void RegisterRoutes(RouteCollection routes)
{
    routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
    routes.IgnoreRoute("{*favicon}", new {favicon = @"(.*/)?favicon.ico(/.*)?"});

    routes.MapRoute(
        "Error - 404",
        "NotFound",
        new { controller = "Error", action = "NotFound" }
        );

    routes.MapRoute(
        "Error - 500",
        "ServerError",
        new { controller = "Error", action = "ServerError"}
        );

    routes.MapRoute(
        "Default", // Route name
        "{controller}/{action}/{id}", // URL with parameters
        new {controller = "Home", action = "Index", id = UrlParameter.Optional}
        );
}

That lists two ignore routes -> axd's and favicons (ooo! bonus ignore route, for you!) Then (and the order is IMPERATIVE HERE), I have my two explicit error handling routes .. followed by any other routes. In this case, the default one. Of course, I have more, but that's special to my web site. Just make sure the error routes are at the top of the list. Order is imperative.

Finally, while we are inside our global.asax file, we do NOT globally register the HandleError attribute. No, no, no sir. Nadda. Nope. Nien. Negative. Noooooooooo...

Remove this line from global.asax

GlobalFilters.Filters.Add(new HandleErrorAttribute());

Step 3 - Create the controller with the action methods

Now .. we add a controller with two action methods ...

public class ErrorController : Controller
{
    public ActionResult NotFound()
    {
        Response.StatusCode = (int)HttpStatusCode.NotFound;
        return View();
    }

    public ActionResult ServerError()
    {
        Response.StatusCode = (int)HttpStatusCode.InternalServerError;

        // Todo: Pass the exception into the view model, which you can make.
        //       That's an exercise, dear reader, for -you-.
        //       In case u want to pass it to the view, if you're admin, etc.
        // if (User.IsAdmin) // <-- I just made that up :) U get the idea...
        // {
        //     var exception = Server.GetLastError();
        //     // etc..
        // }

        return View();
    }

    // Shhh .. secret test method .. ooOOooOooOOOooohhhhhhhh
    public ActionResult ThrowError()
    {
        throw new NotImplementedException("Pew ^ Pew");
    }
}

Ok, lets check this out. First of all, there is NO [HandleError] attribute here. Why? Because the built in ASP.NET framework is already handling errors AND we have specified all the shit we need to do to handle an error :) It's in this method!

Next, I have the two action methods. Nothing tough there. If u wish to show any exception info, then u can use Server.GetLastError() to get that info.

Bonus WTF: Yes, I made a third action method, to test error handling.

Step 4 - Create the Views

And finally, create two views. Put em in the normal view spot, for this controller.

enter image description here

Bonus comments

  • You don't need an Application_Error(object sender, EventArgs e)
  • The above steps all work 100% perfectly with Elmah. Elmah fraking wroxs!

And that, my friends, should be it.

Now, congrats for reading this much and have a Unicorn as a prize!

enter image description here

Is there an easy way to convert jquery code to javascript?

The easiest way is to just learn how to do DOM traversing and manipulation with the plain DOM api (you would probably call this: normal JavaScript).

This can however be a pain for some things. (which is why libraries were invented in the first place).

Googling for "javascript DOM traversing/manipulation" should present you with plenty of helpful (and some less helpful) resources.

The articles on this website are pretty good: http://www.htmlgoodies.com/primers/jsp/

And as Nosredna points out in the comments: be sure to test in all browsers, because now jQuery won't be handling the inconsistencies for you.

How can I set the background color of <option> in a <select> element?

I had this problem too. I found setting the appearance to none helped.

.class {
    appearance:none;
    -moz-appearance:none;
    -webkit-appearance:none;

    background-color: red;
}

adding css class to multiple elements

.button input,
.button a {
    ...
}

Entity Framework : How do you refresh the model when the db changes?

I just had to update an .edmx model. The model/Run Custom Tool option was not refreshing the fields for me, but once I had the graphical designer open, I was able to manually rename the fields.

Solving a "communications link failure" with JDBC and MySQL

The resolution provided by Soheil was successful in my case.

To clarify, the only change I needed to make was with MySQL's server configuration;

bind-address = **INSERT-IP-HERE**

I am using an external MySQL server for my application. It is a basic Debian 7.5 installation with MySQL Server 5.5 - default configuration.

IMPORTANT:

Always backup the original of any configuration files you may modify. Always take care when elevated as super user.

File

/etc/mysql/my.cnf

Line

bind-address        = 192.168.0.103 #127.0.0.1

Restart your MySQL Server service:

/usr/sbin/service mysql restart

As you can see, I simply provided the network IP of the server and commented out the default entry. Please note that simply copy and paste my solution will not work for you, unless by some miracle our hosts share the same IP.

Thanks @ Soheil

How do you add an in-app purchase to an iOS application?

Swift Answer

This is meant to supplement my Objective-C answer for Swift users, to keep the Objective-C answer from getting too big.

Setup

First, set up the in-app purchase on appstoreconnect.apple.com. Follow the beginning part of my Objective-C answer (steps 1-13, under the App Store Connect header) for instructions on doing that.

It could take a few hours for your product ID to register in App Store Connect, so be patient.

Now that you've set up your in-app purchase information on App Store Connect, we need to add Apple's framework for in-app-purchases, StoreKit, to the app.

Go into your Xcode project, and go to the application manager (blue page-like icon at the top of the left bar where your app's files are). Click on your app under targets on the left (it should be the first option), then go to "Capabilities" at the top. On the list, you should see an option "In-App Purchase". Turn this capability ON, and Xcode will add StoreKit to your project.

Coding

Now, we're going to start coding!

First, make a new swift file that will manage all of your in-app-purchases. I'm going to call it IAPManager.swift.

In this file, we're going to create a new class, called IAPManager that is a SKProductsRequestDelegate and SKPaymentTransactionObserver. At the top, make sure you import Foundation and StoreKit

import Foundation
import StoreKit

public class IAPManager: NSObject, SKProductsRequestDelegate,
                         SKPaymentTransactionObserver {
}

Next, we're going to add a variable to define the identifier for our in-app purchase (you could also use an enum, which would be easier to maintain if you have multiple IAPs).

// This should the ID of the in-app-purchase you made on AppStore Connect.
// if you have multiple IAPs, you'll need to store their identifiers in
// other variables, too (or, preferably in an enum).
let removeAdsID = "com.skiplit.removeAds"

Let's add an initializer for our class next:

// This is the initializer for your IAPManager class
//
// A better, and more scaleable way of doing this
// is to also accept a callback in the initializer, and call
// that callback in places like the paymentQueue function, and
// in all functions in this class, in place of calls to functions
// in RemoveAdsManager (you'll see those calls in the code below).

let productID: String
init(productID: String){
    self.productID = productID
}

Now, we're going to add the required functions for SKProductsRequestDelegate and SKPaymentTransactionObserver to work:

We'll add the RemoveAdsManager class later

// This is called when a SKProductsRequest receives a response
public func productsRequest(_ request: SKProductsRequest, didReceive response: SKProductsResponse){
    // Let's try to get the first product from the response
    // to the request
    if let product = response.products.first{
        // We were able to get the product! Make a new payment
        // using this product
        let payment = SKPayment(product: product)

        // add the new payment to the queue
        SKPaymentQueue.default().add(self)
        SKPaymentQueue.default().add(payment)
    }
    else{
        // Something went wrong! It is likely that either
        // the user doesn't have internet connection, or
        // your product ID is wrong!
        //
        // Tell the user in requestFailed() by sending an alert,
        // or something of the sort

        RemoveAdsManager.removeAdsFailure()
    }
}

// This is called when the user restores their IAP sucessfully
private func paymentQueueRestoreCompletedTransactionsFinished(_ queue: SKPaymentQueue){
    // For every transaction in the transaction queue...
    for transaction in queue.transactions{
        // If that transaction was restored
        if transaction.transactionState == .restored{
            // get the producted ID from the transaction
            let productID = transaction.payment.productIdentifier

            // In this case, we have only one IAP, so we don't need to check
            // what IAP it is. However, this is useful if you have multiple IAPs!
            // You'll need to figure out which one was restored
            if(productID.lowercased() == IAPManager.removeAdsID.lowercased()){
                // Restore the user's purchases
                RemoveAdsManager.restoreRemoveAdsSuccess()
            }

            // finish the payment
            SKPaymentQueue.default().finishTransaction(transaction)
        }
    }
}

// This is called when the state of the IAP changes -- from purchasing to purchased, for example.
// This is where the magic happens :)
public func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]){
    for transaction in transactions{
        // get the producted ID from the transaction
        let productID = transaction.payment.productIdentifier

        // In this case, we have only one IAP, so we don't need to check
        // what IAP it is.
        // However, if you have multiple IAPs, you'll need to use productID
        // to check what functions you should run here!

        switch transaction.transactionState{
        case .purchasing:
            // if the user is currently purchasing the IAP,
            // we don't need to do anything.
            //
            // You could use this to show the user
            // an activity indicator, or something like that
            break
        case .purchased:
            // the user successfully purchased the IAP!
            RemoveAdsManager.removeAdsSuccess()
            SKPaymentQueue.default().finishTransaction(transaction)
        case .restored:
                // the user restored their IAP!
                IAPTestingHandler.restoreRemoveAdsSuccess()
                SKPaymentQueue.default().finishTransaction(transaction)
        case .failed:
                // The transaction failed!
                RemoveAdsManager.removeAdsFailure()
                // finish the transaction
                SKPaymentQueue.default().finishTransaction(transaction)
        case .deferred:
                // This happens when the IAP needs an external action
                // in order to proceeded, like Ask to Buy
                RemoveAdsManager.removeAdsDeferred()
                break
        }
    }
}

Now let's add some functions that can be used to start a purchase or a restore purchases:

// Call this when you want to begin a purchase
// for the productID you gave to the initializer
public func beginPurchase(){
    // If the user can make payments
    if SKPaymentQueue.canMakePayments(){
        // Create a new request
        let request = SKProductsRequest(productIdentifiers: [productID])
        // Set the request delegate to self, so we receive a response
        request.delegate = self
        // start the request
        request.start()
    }
    else{
        // Otherwise, tell the user that
        // they are not authorized to make payments,
        // due to parental controls, etc
    }
}

// Call this when you want to restore all purchases
// regardless of the productID you gave to the initializer
public func beginRestorePurchases(){
    // restore purchases, and give responses to self
    SKPaymentQueue.default().add(self)
    SKPaymentQueue.default().restoreCompletedTransactions()
}

Next, let's add a new utilities class to manage our IAPs. All of this code could be in one class, but having it multiple makes it a little cleaner. I'm going to make a new class called RemoveAdsManager, and in it, put a few functions

public class RemoveAdsManager{

    class func removeAds()
    class func restoreRemoveAds()

    class func areAdsRemoved() -> Bool

    class func removeAdsSuccess()
    class func restoreRemoveAdsSuccess()
    class func removeAdsDeferred()
    class func removeAdsFailure()
}

The first three functions, removeAds, restoreRemoveAds, and areAdsRemoved, are functions that you'll call to do certain actions. The last four are one that will be called by IAPManager.

Let's add some code to the first two functions, removeAds and restoreRemoveAds:

// Call this when the user wants
// to remove ads, like when they
// press a "remove ads" button
class func removeAds(){
    // Before starting the purchase, you could tell the
    // user that their purchase is happening, maybe with
    // an activity indicator

    let iap = IAPManager(productID: IAPManager.removeAdsID)
    iap.beginPurchase()
}

// Call this when the user wants
// to restore their IAP purchases,
// like when they press a "restore
// purchases" button.
class func restoreRemoveAds(){
    // Before starting the purchase, you could tell the
    // user that the restore action is happening, maybe with
    // an activity indicator

    let iap = IAPManager(productID: IAPManager.removeAdsID)
    iap.beginRestorePurchases()
}

And lastly, let's add some code to the last five functions.

// Call this to check whether or not
// ads are removed. You can use the
// result of this to hide or show
// ads
class func areAdsRemoved() -> Bool{
    // This is the code that is run to check
    // if the user has the IAP.

    return UserDefaults.standard.bool(forKey: "RemoveAdsPurchased")
}

// This will be called by IAPManager
// when the user sucessfully purchases
// the IAP
class func removeAdsSuccess(){
    // This is the code that is run to actually
    // give the IAP to the user!
    //
    // I'm using UserDefaults in this example,
    // but you may want to use Keychain,
    // or some other method, as UserDefaults
    // can be modified by users using their
    // computer, if they know how to, more
    // easily than Keychain

    UserDefaults.standard.set(true, forKey: "RemoveAdsPurchased")
    UserDefaults.standard.synchronize()
}

// This will be called by IAPManager
// when the user sucessfully restores
//  their purchases
class func restoreRemoveAdsSuccess(){
    // Give the user their IAP back! Likely all you'll need to
    // do is call the same function you call when a user
    // sucessfully completes their purchase. In this case, removeAdsSuccess()

    removeAdsSuccess()
}

// This will be called by IAPManager
// when the IAP failed
class func removeAdsFailure(){
    // Send the user a message explaining that the IAP
    // failed for some reason, and to try again later
}

// This will be called by IAPManager
// when the IAP gets deferred.
class func removeAdsDeferred(){
    // Send the user a message explaining that the IAP
    // was deferred, and pending an external action, like
    // Ask to Buy.
}

Putting it all together, we get something like this:

import Foundation
import StoreKit

public class RemoveAdsManager{

    // Call this when the user wants
    // to remove ads, like when they
    // press a "remove ads" button
    class func removeAds(){
        // Before starting the purchase, you could tell the
        // user that their purchase is happening, maybe with
        // an activity indicator

        let iap = IAPManager(productID: IAPManager.removeAdsID)
        iap.beginPurchase()
    }

    // Call this when the user wants
    // to restore their IAP purchases,
    // like when they press a "restore
    // purchases" button.
    class func restoreRemoveAds(){
        // Before starting the purchase, you could tell the
        // user that the restore action is happening, maybe with
        // an activity indicator

        let iap = IAPManager(productID: IAPManager.removeAdsID)
        iap.beginRestorePurchases()
    }

    // Call this to check whether or not
    // ads are removed. You can use the
    // result of this to hide or show
    // ads
    class func areAdsRemoved() -> Bool{
        // This is the code that is run to check
        // if the user has the IAP.

        return UserDefaults.standard.bool(forKey: "RemoveAdsPurchased")
    }

    // This will be called by IAPManager
    // when the user sucessfully purchases
    // the IAP
    class func removeAdsSuccess(){
        // This is the code that is run to actually
        // give the IAP to the user!
        //
        // I'm using UserDefaults in this example,
        // but you may want to use Keychain,
        // or some other method, as UserDefaults
        // can be modified by users using their
        // computer, if they know how to, more
        // easily than Keychain

        UserDefaults.standard.set(true, forKey: "RemoveAdsPurchased")
        UserDefaults.standard.synchronize()
    }

    // This will be called by IAPManager
    // when the user sucessfully restores
    //  their purchases
    class func restoreRemoveAdsSuccess(){
        // Give the user their IAP back! Likely all you'll need to
        // do is call the same function you call when a user
        // sucessfully completes their purchase. In this case, removeAdsSuccess()
        removeAdsSuccess()
    }

    // This will be called by IAPManager
    // when the IAP failed
    class func removeAdsFailure(){
        // Send the user a message explaining that the IAP
        // failed for some reason, and to try again later
    }

    // This will be called by IAPManager
    // when the IAP gets deferred.
    class func removeAdsDeferred(){
        // Send the user a message explaining that the IAP
        // was deferred, and pending an external action, like
        // Ask to Buy.
    }

}

public class IAPManager: NSObject, SKProductsRequestDelegate, SKPaymentTransactionObserver{

    // This should the ID of the in-app-purchase you made on AppStore Connect.
    // if you have multiple IAPs, you'll need to store their identifiers in
    // other variables, too (or, preferably in an enum).
    static let removeAdsID = "com.skiplit.removeAds"

    // This is the initializer for your IAPManager class
    //
    // An alternative, and more scaleable way of doing this
    // is to also accept a callback in the initializer, and call
    // that callback in places like the paymentQueue function, and
    // in all functions in this class, in place of calls to functions
    // in RemoveAdsManager.
    let productID: String
    init(productID: String){
        self.productID = productID
    }

    // Call this when you want to begin a purchase
    // for the productID you gave to the initializer
    public func beginPurchase(){
        // If the user can make payments
        if SKPaymentQueue.canMakePayments(){
            // Create a new request
            let request = SKProductsRequest(productIdentifiers: [productID])
            request.delegate = self
            request.start()
        }
        else{
            // Otherwise, tell the user that
            // they are not authorized to make payments,
            // due to parental controls, etc
        }
    }

    // Call this when you want to restore all purchases
    // regardless of the productID you gave to the initializer
    public func beginRestorePurchases(){
        SKPaymentQueue.default().add(self)
        SKPaymentQueue.default().restoreCompletedTransactions()
    }

    // This is called when a SKProductsRequest receives a response
    public func productsRequest(_ request: SKProductsRequest, didReceive response: SKProductsResponse){
        // Let's try to get the first product from the response
        // to the request
        if let product = response.products.first{
            // We were able to get the product! Make a new payment
            // using this product
            let payment = SKPayment(product: product)

            // add the new payment to the queue
            SKPaymentQueue.default().add(self)
            SKPaymentQueue.default().add(payment)
        }
        else{
            // Something went wrong! It is likely that either
            // the user doesn't have internet connection, or
            // your product ID is wrong!
            //
            // Tell the user in requestFailed() by sending an alert,
            // or something of the sort

            RemoveAdsManager.removeAdsFailure()
        }
    }

    // This is called when the user restores their IAP sucessfully
    private func paymentQueueRestoreCompletedTransactionsFinished(_ queue: SKPaymentQueue){
        // For every transaction in the transaction queue...
        for transaction in queue.transactions{
            // If that transaction was restored
            if transaction.transactionState == .restored{
                // get the producted ID from the transaction
                let productID = transaction.payment.productIdentifier

                // In this case, we have only one IAP, so we don't need to check
                // what IAP it is. However, this is useful if you have multiple IAPs!
                // You'll need to figure out which one was restored
                if(productID.lowercased() == IAPManager.removeAdsID.lowercased()){
                    // Restore the user's purchases
                    RemoveAdsManager.restoreRemoveAdsSuccess()
                }

                // finish the payment
                SKPaymentQueue.default().finishTransaction(transaction)
            }
        }
    }

    // This is called when the state of the IAP changes -- from purchasing to purchased, for example.
    // This is where the magic happens :)
    public func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]){
        for transaction in transactions{
            // get the producted ID from the transaction
            let productID = transaction.payment.productIdentifier

            // In this case, we have only one IAP, so we don't need to check
            // what IAP it is.
            // However, if you have multiple IAPs, you'll need to use productID
            // to check what functions you should run here!

            switch transaction.transactionState{
            case .purchasing:
                // if the user is currently purchasing the IAP,
                // we don't need to do anything.
                //
                // You could use this to show the user
                // an activity indicator, or something like that
                break
            case .purchased:
                // the user sucessfully purchased the IAP!
                RemoveAdsManager.removeAdsSuccess()
                SKPaymentQueue.default().finishTransaction(transaction)
            case .restored:
                // the user restored their IAP!
                RemoveAdsManager.restoreRemoveAdsSuccess()
                SKPaymentQueue.default().finishTransaction(transaction)
            case .failed:
                // The transaction failed!
                RemoveAdsManager.removeAdsFailure()
                // finish the transaction
                SKPaymentQueue.default().finishTransaction(transaction)
            case .deferred:
                // This happens when the IAP needs an external action
                // in order to proceeded, like Ask to Buy
                RemoveAdsManager.removeAdsDeferred()
                break
            }
        }
    }

}

Lastly, you need to add some way for the user to start the purchase and call RemoveAdsManager.removeAds() and start a restore and call RemoveAdsManager.restoreRemoveAds(), like a button somewhere! Keep in mind that, per the App Store guidelines, you do need to provide a button to restore purchases somewhere.

Submitting for review

The last thing to do is submit your IAP for review on App Store Connect! For detailed instructions on doing that, you can follow the last part of my Objective-C answer, under the Submitting for review header.

Get file name from a file location in Java

new File(absolutePath).getName();

How to set a binding in Code?

You need to change source to viewmodel object:

myBinding.Source = viewModelObject;

Running Git through Cygwin from Windows

I confirm that git and msysgit can coexist on the same computer, as mentioned in "Which GIT version to use cygwin or msysGit or both?".

  1. Git for Windows (msysgit) will run in its own shell (dos with git-cmd.bat or bash with Git Bash.vbs)
    Update 2016: msysgit is obsolete, and the new Git for Windows now uses msys2

  2. Git on Cygwin, after installing its package, will run in its own cygwin bash shell.

git package selection on Cygwin

  1. Finally, since Q3 2016 and the "Windows 10 anniversary update", you can use Git in a bash (an actual Ubuntu(!) bash).

http://www.omgubuntu.co.uk/wp-content/uploads/2016/08/bash-1.jpg

In there, you can do a sudo apt-get install git-core and start using git on project-sources present either on the WSL container's "native" file-system (see below), or in the hosting Windows's file-system through the /mnt/c/..., /mnt/d/... directory hierarchies.

Specifically for the Bash on Windows or WSL (Windows Subsystem for Linux):

  • It is a light-weight virtualization container (technically, a "Drawbridge" pico-process,
  • hosting an unmodified "headless" Linux distribution (i.e. Ubuntu minus the kernel),
  • which can execute terminal-based commands (and even X-server client apps if an X-server for Windows is installed),
  • with emulated access to the Windows file-system (meaning that, apart from reduced performance, encodings for files in DrvFs emulated file-system may not behave the same as files on the native VolFs file-system).

How to test an Internet connection with bash?

In Bash, using it's network wrapper through /dev/{udp,tcp}/host/port:

if : >/dev/tcp/8.8.8.8/53; then
  echo 'Internet available.'
else
  echo 'Offline.'
fi

(: is the Bash no-op, because you just want to test the connection, but not processing.)

How to remove an app with active device admin enabled on Android?

You could also create a new DevicePolicyManager and then use removeAdmin(adminReceiver) from an onClickListener of a button in your app

//set the onClickListener here
{
   ComponentName devAdminReceiver = new ComponentName(context, deviceAdminReceiver.class);
   DevicePolicyManager dpm = (DevicePolicyManager)context.getSystemService(Context.DEVICE_POLICY_SERVICE);
   dpm.removeActiveAdmin(devAdminReceiver);
}

And then you can uninstall

jQuery UI - Draggable is not a function?

  1. Install jquery-ui-dist

    use npm

    npm install --save jquery-ui-dist

    or yarn

    yarn add jquery-ui-dist

  2. Import it inside your app code

    import 'jquery-ui-dist/jquery-ui';

    or

    require('jquery-ui-dist/jquery-ui');

Find the number of employees in each department - SQL Oracle

Try the query below:

select count(*),d.dname from emp e , dept d where d.deptno = e.deptno
group by d.dname

EF 5 Enable-Migrations : No context type was found in the assembly

Adding a class which inherits DbContext resolved my problem:

public class MyDbContext : DbContext { public MyDbContext() { } }

Display Python datetime without time

To convert a string into a date, the easiest way AFAIK is the dateutil module:

import dateutil.parser
datetime_object = dateutil.parser.parse("2013-05-07")

It can also handle time zones:

print(dateutil.parser.parse("2013-05-07"))
>>> datetime.datetime(2013, 5, 7, 1, 12, 12, tzinfo=tzutc())

If you have a datetime object, say:

import pytz
import datetime
now = datetime.datetime.now(pytz.UTC)

and you want chop off the time part, then I think it is easier to construct a new object instead of "substracting the time part". It is shorter and more bullet proof:

date_part datetime.datetime(now.year, now.month, now.day, tzinfo=now.tzinfo)

It also keeps the time zone information, it is easier to read and understand than a timedelta substraction, and you also have the option to give a different time zone in the same step (which makes sense, since you will have zero time part anyway).

jQuery fade out then fade in

fade the other in in the callback of fadeout, which runs when fadeout is done. Using your code:

$('#two, #three').hide();
$('.slide').click(function(){
    var $this = $(this);
    $this.fadeOut(function(){ $this.next().fadeIn(); });
});

alternatively, you can just "pause" the chain, but you need to specify for how long:

$(this).fadeOut().next().delay(500).fadeIn();

Why is the Java main method static?

It's a frequently asked question why main() is static in Java.

Answer: We know that in Java, execution starts from main() by JVM. When JVM executes main() at that time, the class which contains main() is not instantiated so we can't call a nonstatic method without the reference of it's object. So to call it we made it static, due to which the class loader loads all the static methods in JVM context memory space from where JVM can directly call them.

How do I make bootstrap table rows clickable?

That code transforms any bootstrap table row that has data-href attribute set into a clickable element

Note: data-href attribute is a valid tr attribute (HTML5), href attributes on tr element are not.

$(function(){
    $('.table tr[data-href]').each(function(){
        $(this).css('cursor','pointer').hover(
            function(){ 
                $(this).addClass('active'); 
            },  
            function(){ 
                $(this).removeClass('active'); 
            }).click( function(){ 
                document.location = $(this).attr('data-href'); 
            }
        );
    });
});

Sending email from Command-line via outlook without having to click send

Option 1
You didn't say much about your environment, but assuming you have it available you could use a PowerShell script; one example is here. The essence of this is:

$smtp = New-Object Net.Mail.SmtpClient("ho-ex2010-caht1.exchangeserverpro.net")
$smtp.Send("[email protected]","[email protected]","Test Email","This is a test")

You could then launch the script from the command line as per this example:

powershell.exe -noexit c:\scripts\test.ps1

Note that PowerShell 2.0, which is installed by default on Windows 7 and Windows Server 2008R2, includes a simpler Send-MailMessage command, making things easier.

Option 2
If you're prepared to use third-party software, is something line this SendEmail command-line tool. It depends on your target environment, though; if you're deploying your batch file to multiple machines, that will obviously require inclusion (but not formal installation) each time.

Option 3
You could drive Outlook directly from a VBA script, which in turn you would trigger from a batch file; this would let you send an email using Outlook itself, which looks to be closest to what you're wanting. There are two parts to this; first, figure out the VBA scripting required to send an email. There are lots of examples for this online, including from Microsoft here. Essence of this is:

Sub SendMessage(DisplayMsg As Boolean, Optional AttachmentPath)
    Dim objOutlook As Outlook.Application
    Dim objOutlookMsg As Outlook.MailItem
    Dim objOutlookRecip As Outlook.Recipient
    Dim objOutlookAttach As Outlook.Attachment

    Set objOutlook = CreateObject("Outlook.Application")
    Set objOutlookMsg  = objOutlook.CreateItem(olMailItem)

    With objOutlookMsg
        Set objOutlookRecip = .Recipients.Add("Nancy Davolio")
        objOutlookRecip.Type = olTo
        ' Set the Subject, Body, and Importance of the message.
        .Subject = "This is an Automation test with Microsoft Outlook"
        .Body = "This is the body of the message." &vbCrLf & vbCrLf
        .Importance = olImportanceHigh  'High importance

        If Not IsMissing(AttachmentPath) Then
            Set objOutlookAttach = .Attachments.Add(AttachmentPath)
        End If

        For Each ObjOutlookRecip In .Recipients
            objOutlookRecip.Resolve
        Next

        .Save
        .Send
    End With
    Set objOutlook = Nothing
End Sub

Then, launch Outlook from the command line with the /autorun parameter, as per this answer (alter path/macroname as necessary):

C:\Program Files\Microsoft Office\Office11\Outlook.exe" /autorun macroname

Option 4
You could use the same approach as option 3, but move the Outlook VBA into a PowerShell script (which you would run from a command line). Example here. This is probably the tidiest solution, IMO.

changing source on html5 video tag

I have a similar web app and am not facing that sort of problem at all. What i do is something like this:

var sources = new Array();

sources[0] = /path/to/file.mp4
sources[1] = /path/to/another/file.ogg
etc..

then when i want to change the sources i have a function that does something like this:

this.loadTrack = function(track){
var mediaSource = document.getElementsByTagName('source')[0];
mediaSource.src = sources[track];

    var player = document.getElementsByTagName('video')[0];
    player.load();

}

I do this so that the user can make their way through a playlist, but you could check for userAgent and then load the appropriate file that way. I tried using multiple source tags like everyone on the internet suggested, but i found it much cleaner, and much more reliable to manipulate the src attribute of a single source tag. The code above was written from memory, so i may have glossed over some of hte details, but the general idea is to dynamically change the src attribute of the source tag using javascript, when appropriate.

Android app unable to start activity componentinfo

Your null pointer exception seems to be on this line:

String url = intent.getExtras().getString("userurl");

because intent.getExtras() returns null when the intent doesn't have any extras.

You have to realize that this piece of code:

Intent Main = new Intent(this, ToClass.class);
Main.putExtra("userurl", url);
startActivity(Main);

doesn't start the activity you wrote in Main.java, it will attempt to start an activity called ToClass and if that doesn't exist, your app crashes.

Also, there is no such thing as "android.intent.action.start" so the manifest should look more like:

<activity android:name=".start" android:label="@string/app_name">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>
<activity android:name= ".Main">
</activity>

I hope this fixes some of the issues you are encountering but I strongly suggest you check out some "getting started" tutorials for android development and build up from there.

Creating a zero-filled pandas data frame

Assuming having a template DataFrame, which one would like to copy with zero values filled here...

If you have no NaNs in your data set, multiplying by zero can be significantly faster:

In [19]: columns = ["col{}".format(i) for i in xrange(3000)]                                                                                       

In [20]: indices = xrange(2000)

In [21]: orig_df = pd.DataFrame(42.0, index=indices, columns=columns)

In [22]: %timeit d = pd.DataFrame(np.zeros_like(orig_df), index=orig_df.index, columns=orig_df.columns)
100 loops, best of 3: 12.6 ms per loop

In [23]: %timeit d = orig_df * 0.0
100 loops, best of 3: 7.17 ms per loop

Improvement depends on DataFrame size, but never found it slower.

And just for the heck of it:

In [24]: %timeit d = orig_df * 0.0 + 1.0
100 loops, best of 3: 13.6 ms per loop

In [25]: %timeit d = pd.eval('orig_df * 0.0 + 1.0')
100 loops, best of 3: 8.36 ms per loop

But:

In [24]: %timeit d = orig_df.copy()
10 loops, best of 3: 24 ms per loop

EDIT!!!

Assuming you have a frame using float64, this will be the fastest by a huge margin! It is also able to generate any value by replacing 0.0 to the desired fill number.

In [23]: %timeit d = pd.eval('orig_df > 1.7976931348623157e+308 + 0.0')
100 loops, best of 3: 3.68 ms per loop

Depending on taste, one can externally define nan, and do a general solution, irrespective of the particular float type:

In [39]: nan = np.nan
In [40]: %timeit d = pd.eval('orig_df > nan + 0.0')
100 loops, best of 3: 4.39 ms per loop

Why use #define instead of a variable

The #define is part of the preprocessor language for C and C++. When they're used in code, the compiler just replaces the #define statement with what ever you want. For example, if you're sick of writing for (int i=0; i<=10; i++) all the time, you can do the following:

#define fori10 for (int i=0; i<=10; i++)

// some code...

fori10 {
    // do stuff to i
}

If you want something more generic, you can create preprocessor macros:

#define fori(x) for (int i=0; i<=x; i++)
// the x will be replaced by what ever is put into the parenthesis, such as
// 20 here
fori(20) {
    // do more stuff to i
}

It's also very useful for conditional compilation (the other major use for #define) if you only want certain code used in some particular build:

// compile the following if debugging is turned on and defined
#ifdef DEBUG
// some code
#endif

Most compilers will allow you to define a macro from the command line (e.g. g++ -DDEBUG something.cpp), but you can also just put a define in your code like so:

#define DEBUG

Some resources:

  1. Wikipedia article
  2. C++ specific site
  3. Documentation on GCC's preprocessor
  4. Microsoft reference
  5. C specific site (I don't think it's different from the C++ version though)

JUnit Eclipse Plugin?

JUnit is part of Eclipse Java Development Tools (JDT). So, either install the JDT via Software Updates or download and install Eclipse IDE for Java Developers (actually, I'd recommend installing Eclipse IDE for Java EE Developers if you want a complete built-in environment for server side development).

You add it to a project by right clicking the project in the Package Explorer and selecting Build Path -> Add Libraries... Then simply select JUnit and click Next >.

Python - TypeError: 'int' object is not iterable

If the case is:

n=int(input())

Instead of -> for i in n: -> gives error- 'int' object is not iterable

Use -> for i in range(0,n): -> works fine..!

Opacity CSS not working in IE8

Setting these (exactly like I have written) has served me when I needed it:

-moz-opacity: 0.70;
opacity:.70;
filter: alpha(opacity=70);

Unable to make the session state request to the session state server

I recently ran into this issue and none of the solutions proposed fixed it. The issue turned out to be an excessive use of datasets stored in the session. There was a flaw in the code that results in the session size to increase 10x.

There is an article on the msdn blog that also talks about this. http://blogs.msdn.com/b/johan/archive/2006/11/20/sessionstate-performance.aspx

I used a function to write custom trace messages to measure the size of the session data on the live site.

Splitting a string into chunks of a certain size

Here's my 2 cents:

  IEnumerable<string> Split(string str, int chunkSize)
  {
     while (!string.IsNullOrWhiteSpace(str))
     {
        var chunk = str.Take(chunkSize).ToArray();
        str = str.Substring(chunk.Length);
        yield return new string(chunk);

     }

  }//Split

C++ Get name of type in template

I just leave it there. If someone will still need it, then you can use this:

template <class T>
bool isString(T* t) { return false;  } // normal case returns false

template <>
bool isString(char* t) { return true; }  // but for char* or String.c_str() returns true
.
.
.

This will only CHECK type not GET it and only for 1 type or 2.

How to query MongoDB with "like"?

You have 2 choices:

db.users.find({"name": /string/})

or

db.users.find({"name": {"$regex": "string", "$options": "i"}})

On second one you have more options, like "i" in options to find using case insensitive. And about the "string", you can use like ".string." (%string%), or "string.*" (string%) and ".*string) (%string) for example. You can use regular expression as you want.

Enjoy!

Background service with location listener in android

First you need to create a Service. In that Service, create a class extending LocationListener. For this, use the following code snippet of Service:

public class LocationService extends Service {
public static final String BROADCAST_ACTION = "Hello World";
private static final int TWO_MINUTES = 1000 * 60 * 2;
public LocationManager locationManager;
public MyLocationListener listener;
public Location previousBestLocation = null;

Intent intent;
int counter = 0;

@Override
public void onCreate() {
    super.onCreate();
    intent = new Intent(BROADCAST_ACTION);
}

@Override
public void onStart(Intent intent, int startId) {
    locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    listener = new MyLocationListener();
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        return;
    }
    locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 4000, 0, (LocationListener) listener);
    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 4000, 0, listener);
}

@Override
public IBinder onBind(Intent intent)
{
    return null;
}

protected boolean isBetterLocation(Location location, Location currentBestLocation) {
    if (currentBestLocation == null) {
        // A new location is always better than no location
        return true;
    }

    // Check whether the new location fix is newer or older
    long timeDelta = location.getTime() - currentBestLocation.getTime();
    boolean isSignificantlyNewer = timeDelta > TWO_MINUTES;
    boolean isSignificantlyOlder = timeDelta < -TWO_MINUTES;
    boolean isNewer = timeDelta > 0;

    // If it's been more than two minutes since the current location, use the new location
    // because the user has likely moved
    if (isSignificantlyNewer) {
        return true;
        // If the new location is more than two minutes older, it must be worse
    } else if (isSignificantlyOlder) {
        return false;
    }

    // Check whether the new location fix is more or less accurate
    int accuracyDelta = (int) (location.getAccuracy() - currentBestLocation.getAccuracy());
    boolean isLessAccurate = accuracyDelta > 0;
    boolean isMoreAccurate = accuracyDelta < 0;
    boolean isSignificantlyLessAccurate = accuracyDelta > 200;

    // Check if the old and new location are from the same provider
    boolean isFromSameProvider = isSameProvider(location.getProvider(),
            currentBestLocation.getProvider());

    // Determine location quality using a combination of timeliness and accuracy
    if (isMoreAccurate) {
        return true;
    } else if (isNewer && !isLessAccurate) {
        return true;
    } else if (isNewer && !isSignificantlyLessAccurate && isFromSameProvider) {
        return true;
    }
    return false;
}



/** Checks whether two providers are the same */
private boolean isSameProvider(String provider1, String provider2) {
    if (provider1 == null) {
        return provider2 == null;
    }
    return provider1.equals(provider2);
}



@Override
public void onDestroy() {
    // handler.removeCallbacks(sendUpdatesToUI);     
    super.onDestroy();
    Log.v("STOP_SERVICE", "DONE");
    locationManager.removeUpdates(listener);
}

public static Thread performOnBackgroundThread(final Runnable runnable) {
    final Thread t = new Thread() {
        @Override
        public void run() {
            try {
                runnable.run();
            } finally {

            }
        }
    };
    t.start();
    return t;
}
public class MyLocationListener implements LocationListener
{

    public void onLocationChanged(final Location loc)
    {
        Log.i("*****", "Location changed");
        if(isBetterLocation(loc, previousBestLocation)) {
            loc.getLatitude();
            loc.getLongitude();
            intent.putExtra("Latitude", loc.getLatitude());
            intent.putExtra("Longitude", loc.getLongitude());
            intent.putExtra("Provider", loc.getProvider());
            sendBroadcast(intent);

        }
    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {

    }

    public void onProviderDisabled(String provider)
    {
        Toast.makeText( getApplicationContext(), "Gps Disabled", Toast.LENGTH_SHORT ).show();
    }


    public void onProviderEnabled(String provider)
    {
        Toast.makeText( getApplicationContext(), "Gps Enabled", Toast.LENGTH_SHORT).show();
    }
}

Add this Service any where in your project, the way you want! :)

Combining node.js and Python

I'd recommend using some work queue using, for example, the excellent Gearman, which will provide you with a great way to dispatch background jobs, and asynchronously get their result once they're processed.

The advantage of this, used heavily at Digg (among many others) is that it provides a strong, scalable and robust way to make workers in any language to speak with clients in any language.

Transmitting newline character "\n"

late to the party, but if anyone comes across this, javascript has a encodeURI method

hibernate could not get next sequence value

For anyone using FluentNHibernate (my version is 2.1.2), it's just as repetitive but this works:

public class UserMap : ClassMap<User>
{
    public UserMap()
    {
        Table("users");
        Id(x => x.Id).Column("id").GeneratedBy.SequenceIdentity("users_id_seq");

How to fill a datatable with List<T>

Try this

static DataTable ConvertToDatatable(List<Item> list)
{
    DataTable dt = new DataTable();

    dt.Columns.Add("Name");
    dt.Columns.Add("Price");
    dt.Columns.Add("URL");
    foreach (var item in list)
    {
        var row = dt.NewRow();

        row["Name"] = item.Name;
        row["Price"] = Convert.ToString(item.Price);
        row["URL"] = item.URL;

        dt.Rows.Add(row);
    }

    return dt;
}

How to initialize java.util.date to empty

IMO, you cannot create an empty Date(java.util). You can create a Date object with null value and can put a null check.

 Date date = new Date(); // Today's date and current time
 Date date2 = new Date(0); // Default date and time
 Date date3 = null; //Date object with null as value.
 if(null != date3) {
    // do your work.
 }

Assigning a function to a variable

when you perform y=x() you are actually assigning y to the result of calling the function object x and the function has a return value of None. Function calls in python are performed using (). To assign x to y so you can call y just like you would x you assign the function object x to y like y=x and call the function using y()

Check if the file exists using VBA

I'm not certain what's wrong with your code specifically, but I use this function I found online (URL in the comments) for checking if a file exists:

Private Function File_Exists(ByVal sPathName As String, Optional Directory As Boolean) As Boolean
    'Code from internet: http://vbadud.blogspot.com/2007/04/vba-function-to-check-file-existence.html
    'Returns True if the passed sPathName exist
    'Otherwise returns False
    On Error Resume Next
    If sPathName <> "" Then

        If IsMissing(Directory) Or Directory = False Then

            File_Exists = (Dir$(sPathName) <> "")
        Else

            File_Exists = (Dir$(sPathName, vbDirectory) <> "")
        End If

    End If
End Function

How a thread should close itself in Java?

If you're at the top level - or able to cleanly get to the top level - of the thread, then just returning is nice. Throwing an exception isn't as clean, as you need to be able to check that nothing's going to catch the exception and ignore it.

The reason you need to use Thread.currentThread() in order to call interrupt() is that interrupt() is an instance method - you need to call it on the thread you want to interrupt, which in your case happens to be the current thread. Note that the interruption will only be noticed the next time the thread would block (e.g. for IO or for a monitor) anyway - it doesn't mean the exception is thrown immediately.

Setting multiple attributes for an element at once with JavaScript

Or create a function that creates an element including attributes from parameters

function elemCreate(elType){
  var element = document.createElement(elType);
  if (arguments.length>1){
    var props = [].slice.call(arguments,1), key = props.shift();
    while (key){ 
      element.setAttribute(key,props.shift());
      key = props.shift();
    }
  }
  return element;
}
// usage
var img = elemCreate('img',
            'width','100',
            'height','100',
            'src','http://example.com/something.jpeg');

FYI: height/width='100%' would not work using attributes. For a height/width of 100% you need the elements style.height/style.width

How to raise a ValueError?

>>> def contains(string, char):
...     for i in xrange(len(string) - 1, -1, -1):
...         if string[i] == char:
...             return i
...     raise ValueError("could not find %r in %r" % (char, string))
...
>>> contains('bababa', 'k')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 5, in contains
ValueError: could not find 'k' in 'bababa'
>>> contains('bababa', 'a')
5
>>> contains('bababa', 'b')
4
>>> contains('xbababa', 'x')
0
>>>

How to style icon color, size, and shadow of Font Awesome Icons

Try to simply use something like fa-lg,fa-2x,fa-3x,fa-4x,fa-5x to increase the icon size relative to their container

for eg:-

Getting activity from context in android

From your Activity, just pass in this as the Context for your layout:

ProfileView pv = new ProfileView(this, null, temp, tempPd);

Afterwards you will have a Context in the layout, but you will know it is actually your Activity and you can cast it so that you have what you need:

Activity activity = (Activity) context;

How do I get a plist as a Dictionary in Swift?

Step 1 : Simple and fastest way to parse plist in swift 3+

extension Bundle {

    func parsePlist(ofName name: String) -> [String: AnyObject]? {

        // check if plist data available
        guard let plistURL = Bundle.main.url(forResource: name, withExtension: "plist"),
            let data = try? Data(contentsOf: plistURL)
            else {
                return nil
        }

        // parse plist into [String: Anyobject]
        guard let plistDictionary = try? PropertyListSerialization.propertyList(from: data, options: [], format: nil) as? [String: AnyObject] else {
            return nil
        }

        return plistDictionary
    }
}

Step 2: How to use:

Bundle().parsePlist(ofName: "Your-Plist-Name")

How do I solve this "Cannot read property 'appendChild' of null" error?

Just reorder or make sure, the (DOM or HTML) is loaded before the JavaScript.

Calculate Age in MySQL (InnoDb)

SELECT TIMESTAMPDIFF (YEAR, YOUR_COLUMN, CURDATE()) FROM YOUR_TABLE AS AGE

Click for demo..

Simple but elegant..

Is it possible to use 'else' in a list comprehension?

Also, would I be right in concluding that a list comprehension is the most efficient way to do this?

Maybe. List comprehensions are not inherently computationally efficient. It is still running in linear time.

From my personal experience: I have significantly reduced computation time when dealing with large data sets by replacing list comprehensions (specifically nested ones) with for-loop/list-appending type structures you have above. In this application I doubt you will notice a difference.

How do I measure separate CPU core usage for a process?

dstat -C 0,1,2,3 

Will also give you the CPU usage of first 4 cores. Of course, if you have 32 cores then this command gets a little bit longer but useful if you only interested in few cores.

For example, if you only interested in core 3 and 7 then you could do

dstat -C 3,7

Copying text to the clipboard using Java

The following class allows you to copy/paste a String to/from the clipboard.

import java.awt.*;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.StringSelection;

import static java.awt.event.KeyEvent.*;
import static org.apache.commons.lang3.SystemUtils.IS_OS_MAC;

public class SystemClipboard
{
    public static void copy(String text)
    {
        Clipboard clipboard = getSystemClipboard();
        clipboard.setContents(new StringSelection(text), null);
    }

    public static void paste() throws AWTException
    {
        Robot robot = new Robot();

        int controlKey = IS_OS_MAC ? VK_META : VK_CONTROL;
        robot.keyPress(controlKey);
        robot.keyPress(VK_V);
        robot.keyRelease(controlKey);
        robot.keyRelease(VK_V);
    }

    public static String get() throws Exception
    {
        Clipboard systemClipboard = getSystemClipboard();
        DataFlavor dataFlavor = DataFlavor.stringFlavor;

        if (systemClipboard.isDataFlavorAvailable(dataFlavor))
        {
            Object text = systemClipboard.getData(dataFlavor);
            return (String) text;
        }

        return null;
    }

    private static Clipboard getSystemClipboard()
    {
        Toolkit defaultToolkit = Toolkit.getDefaultToolkit();
        return defaultToolkit.getSystemClipboard();
    }
}

jQuery Scroll to Div

It is often required to move both body and html objects together.

$('html,body').animate({
   scrollTop: $("#divToBeScrolledTo").offset().top
});

ShiftyThomas is right:

$("#divToBeScrolledTo").offset().top + 10 // +10 (pixels) reduces the margin.

So to increase the margin use:

$("#divToBeScrolledTo").offset().top - 10 // -10 (pixels) would increase the margin between the top of your window and your element.

PHP shell_exec() vs exec()

shell_exec returns all of the output stream as a string. exec returns the last line of the output by default, but can provide all output as an array specifed as the second parameter.

See

What are the lesser known but useful data structures?

I like Cache Oblivious datastructures. The basic idea is to lay out a tree in recursively smaller blocks so that caches of many different sizes will take advantage of blocks that convenient fit in them. This leads to efficient use of caching at everything from L1 cache in RAM to big chunks of data read off of the disk without needing to know the specifics of the sizes of any of those caching layers.

Choosing bootstrap vs material design

As far as I know you can use all mentioned technologies separately or together. It's up to you. I think you look at the problem from the wrong angle. Material Design is just the way particular elements of the page are designed, behave and put together. Material Design provides great UI/UX, but it relies on the graphic layout (HTML/CSS) rather than JS (events, interactions).

On the other hand, AngularJS and Bootstrap are front-end frameworks that can speed up your development by saving you from writing tons of code. For example, you can build web app utilizing AngularJS, but without Material Design. Or You can build simple HTML5 web page with Material Design without AngularJS or Bootstrap. Finally you can build web app that uses AngularJS with Bootstrap and with Material Design. This is the best scenario. All technologies support each other.

  1. Bootstrap = responsive page
  2. AngularJS = MVC
  3. Material Design = great UI/UX

You can check awesome material design components for AngularJS:

https://material.angularjs.org


enter image description here

Demo: https://material.angularjs.org/latest/demo/ enter image description here

What causes imported Maven project in Eclipse to use Java 1.5 instead of Java 1.6 by default and how can I ensure it doesn't?

<project>

    <!-- ... -->

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.2</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

C++ "Access violation reading location" Error

You haven't posted the findvertex method, but Access Reading Violation with an offset like 0x00000048 means that the Vertex* f; in your getCost function is receiving null, and when trying to access the member adj in the null Vertex pointer (that is, in f), it is offsetting to adj (in this case, 72 bytes ( 0x48 bytes in decimal )), it's reading near the 0 or null memory address.

Doing a read like this violates Operating-System protected memory, and more importantly means whatever you're pointing at isn't a valid pointer. Make sure findvertex isn't returning null, or do a comparisong for null on f before using it to keep yourself sane (or use an assert):

assert( f != null ); // A good sanity check

EDIT:

If you have a map for doing something like a find, you can just use the map's find method to make sure the vertex exists:

Vertex* Graph::findvertex(string s)
{
    vmap::iterator itr = map1.find( s );
    if ( itr == map1.end() )
    {
        return NULL;
    }
    return itr->second;
}

Just make sure you're still careful to handle the error case where it does return NULL. Otherwise, you'll keep getting this access violation.

Error "There is already an open DataReader associated with this Command which must be closed first" when using 2 distinct commands

  1. The optimal solution could be to try to transform your solution into a form where you don't need to have two readers open at a time. Ideally it could be a single query. I don't have time to do that now.
  2. If your problem is so special that you really need to have more readers open simultaneously, and your requirements allow not older than SQL Server 2005 DB backend, then the magic word is MARS (Multiple Active Result Sets). http://msdn.microsoft.com/en-us/library/ms345109%28v=SQL.90%29.aspx. Bob Vale's linked topic's solution shows how to enable it: specify MultipleActiveResultSets=true in your connection string. I just tell this as an interesting possibility, but you should rather transform your solution.

    • in order to avoid the mentioned SQL injection possibility, set the parameters to the SQLCommand itself instead of embedding them into the query string. The query string should only contain the references to the parameters what you pass into the SqlCommand.

SQL Server datetime LIKE select?

Unfortunately, It is not possible to compare datetime towards varchar using 'LIKE' But the desired output is possible in another way.

    select * from record where datediff(dd,[record].[register_date],'2009-10-10')=0

Formatting floats without trailing zeros

Use %g with big enough width, for example '%.99g'. It will print in fixed-point notation for any reasonably big number.

EDIT: it doesn't work

>>> '%.99g' % 0.0000001
'9.99999999999999954748111825886258685613938723690807819366455078125e-08'

Is either GET or POST more secure than the other?

GET is visible to anyone (even the one on your shoulder now) and is saved on cache, so is less secure of using post, btw post without some cryptographics routine is not sure, for a bit of security you've to use SSL (https)

Using two CSS classes on one element

Another option is to use Descendant selectors

HTML:

<div class="social">
<p class="first">burrito</p>
<p class="last">chimichanga</p>
</div>

Reference first one in CSS: .social .first { color: blue; }

Reference last one in CSS: .social .last { color: green; }

Jsfiddle: https://jsfiddle.net/covbtpaq/153/

Commit history on remote repository

git log remotename/branchname

Will display the log of a given remote branch in that repository, but only the logs that you have "fetched" from their repository to your personal "copy" of the remote repository.

Remember that your clone of the repository will update its state of any remote branches only by doing git fetch. You can't connect directly to the server to check the log there, what you do is download the state of the server with git fetch and then locally see the log of the remote branches.

Perhaps another useful command could be:

git log HEAD..remote/branch

which will show you the commits that are in the remote branch, but not in your current branch (HEAD).

SQL Server CTE and recursion example

    --DROP TABLE #Employee
    CREATE TABLE #Employee(EmpId BIGINT IDENTITY,EmpName VARCHAR(25),Designation VARCHAR(25),ManagerID BIGINT)

    INSERT INTO #Employee VALUES('M11M','Manager',NULL)
    INSERT INTO #Employee VALUES('P11P','Manager',NULL)

    INSERT INTO #Employee VALUES('AA','Clerk',1)
    INSERT INTO #Employee VALUES('AB','Assistant',1)
    INSERT INTO #Employee VALUES('ZC','Supervisor',2)
    INSERT INTO #Employee VALUES('ZD','Security',2)


    SELECT * FROM #Employee (NOLOCK)

    ;
    WITH Emp_CTE 
    AS
    (
        SELECT EmpId,EmpName,Designation, ManagerID
              ,CASE WHEN ManagerID IS NULL THEN EmpId ELSE ManagerID END ManagerID_N
        FROM #Employee  
    )
    select EmpId,EmpName,Designation, ManagerID
    FROM Emp_CTE
    order BY ManagerID_N, EmpId

Kotlin unresolved reference in IntelliJ

Ran into this issue. I had to add the following to my build.grade:

apply plugin: 'kotlin-android'

how to rotate a bitmap 90 degrees

Short extension for Kotlin

fun Bitmap.rotate(degrees: Float): Bitmap {
    val matrix = Matrix().apply { postRotate(degrees) }
    return Bitmap.createBitmap(this, 0, 0, width, height, matrix, true)
}

And usage:

val rotatedBitmap = bitmap.rotate(90f)

How to process a file in PowerShell line-by-line as a stream

System.IO.File.ReadLines() is perfect for this scenario. It returns all the lines of a file, but lets you begin iterating over the lines immediately which means it does not have to store the entire contents in memory.

Requires .NET 4.0 or higher.

foreach ($line in [System.IO.File]::ReadLines($filename)) {
    # do something with $line
}

http://msdn.microsoft.com/en-us/library/dd383503.aspx

What do the crossed style properties in Google Chrome devtools mean?

If you want to apply the style even after getting struck-trough indication, you can use "!important" to enforce the style. It may not be a right solution but solve the problem.

How to add a 'or' condition in #ifdef

May use this-

#if defined CONDITION1 || defined CONDITION2
//your code here
#endif

This also does the same-

#if defined(CONDITION1) || defined(CONDITION2)
//your code here
#endif

Further-

  • AND: #if defined CONDITION1 && defined CONDITION2
  • XOR: #if defined CONDITION1 ^ defined CONDITION2
  • AND NOT: #if defined CONDITION1 && !defined CONDITION2

Initializing a list to a known number of elements in Python

You should consider using a dict type instead of pre-initialized list. The cost of a dictionary look-up is small and comparable to the cost of accessing arbitrary list element.

And when using a mapping you can write:

aDict = {}
aDict[100] = fetchElement()
putElement(fetchElement(), fetchPosition(), aDict)

And the putElement function can store item at any given position. And if you need to check if your collection contains element at given index it is more Pythonic to write:

if anIndex in aDict:
    print "cool!"

Than:

if not myList[anIndex] is None:
    print "cool!"

Since the latter assumes that no real element in your collection can be None. And if that happens - your code misbehaves.

And if you desperately need performance and that's why you try to pre-initialize your variables, and write the fastest code possible - change your language. The fastest code can't be written in Python. You should try C instead and implement wrappers to call your pre-initialized and pre-compiled code from Python.

Execute a shell function with timeout

I have a slight modification of @Tiago Lopo's answer that can handle commands with multiple arguments. I've also tested TauPan's solution, but it does not work if you use it multiple times in a script, while Tiago's does.

function timeout_cmd { 
  local arr
  local cmd
  local timeout

  arr=( "$@" )

  # timeout: first arg
  # cmd: the other args
  timeout="${arr[0]}"
  cmd=( "${arr[@]:1}" )

  ( 
    eval "${cmd[@]}" &
    child=$!

    echo "child: $child"
    trap -- "" SIGTERM 
    (       
      sleep "$timeout"
      kill "$child" 2> /dev/null 
    ) &     
    wait "$child"
  )
}

Here's a fully functional script thant you can use to test the function above:

$ ./test_timeout.sh -h
Usage:
  test_timeout.sh [-n] [-r REPEAT] [-s SLEEP_TIME] [-t TIMEOUT]
  test_timeout.sh -h

Test timeout_cmd function.

Options:
  -n              Dry run, do not actually sleep. 
  -r REPEAT       Reapeat everything multiple times [default: 1].
  -s SLEEP_TIME   Sleep for SLEEP_TIME seconds [default: 5].
  -t TIMEOUT      Timeout after TIMEOUT seconds [default: no timeout].

For example you cnal launch like this:

$ ./test_timeout.sh -r 2 -s 5 -t 3
Try no: 1
  - Set timeout to: 3
child: 2540
    -> retval: 143
    -> The command timed out
Try no: 2
  - Set timeout to: 3
child: 2593
    -> retval: 143
    -> The command timed out
Done!
#!/usr/bin/env bash

#shellcheck disable=SC2128
SOURCED=false && [ "$0" = "$BASH_SOURCE" ] || SOURCED=true

if ! $SOURCED; then
  set -euo pipefail
  IFS=$'\n\t'
fi

#################### helpers
function check_posint() {
  local re='^[0-9]+$'
  local mynum="$1"
  local option="$2"

  if ! [[ "$mynum" =~ $re ]] ; then
     (echo -n "Error in option '$option': " >&2)
     (echo "must be a positive integer, got $mynum." >&2)
     exit 1
  fi

  if ! [ "$mynum" -gt 0 ] ; then
     (echo "Error in option '$option': must be positive, got $mynum." >&2)
     exit 1
  fi
}
#################### end: helpers

#################### usage
function short_usage() {
  (>&2 echo \
"Usage:
  test_timeout.sh [-n] [-r REPEAT] [-s SLEEP_TIME] [-t TIMEOUT]
  test_timeout.sh -h"
  )
}

function usage() {
  (>&2 short_usage )
  (>&2 echo \
"
Test timeout_cmd function.

Options:
  -n              Dry run, do not actually sleep. 
  -r REPEAT       Reapeat everything multiple times [default: 1].
  -s SLEEP_TIME   Sleep for SLEEP_TIME seconds [default: 5].
  -t TIMEOUT      Timeout after TIMEOUT seconds [default: no timeout].
")
}
#################### end: usage

help_flag=false
dryrun_flag=false
SLEEP_TIME=5
TIMEOUT=-1
REPEAT=1

while getopts ":hnr:s:t:" opt; do
  case $opt in
    h)
      help_flag=true
      ;;    
    n)
      dryrun_flag=true
      ;;
    r)
      check_posint "$OPTARG" '-r'

      REPEAT="$OPTARG"
      ;;
    s)
      check_posint "$OPTARG" '-s'

      SLEEP_TIME="$OPTARG"
      ;;
    t)
      check_posint "$OPTARG" '-t'

      TIMEOUT="$OPTARG"
      ;;
    \?)
      (>&2 echo "Error. Invalid option: -$OPTARG.")
      (>&2 echo "Try -h to get help")
      short_usage
      exit 1
      ;;
    :)
      (>&2 echo "Error.Option -$OPTARG requires an argument.")
      (>&2 echo "Try -h to get help")
      short_usage
      exit 1
      ;;
  esac
done

if $help_flag; then
  usage
  exit 0
fi

#################### utils
if $dryrun_flag; then
  function wrap_run() {
    ( echo -en "[dry run]\\t" )
    ( echo "$@" )
  }
else
  function wrap_run() { "$@"; }
fi

# Execute a shell function with timeout
# https://stackoverflow.com/a/24416732/2377454
function timeout_cmd { 
  local arr
  local cmd
  local timeout

  arr=( "$@" )

  # timeout: first arg
  # cmd: the other args
  timeout="${arr[0]}"
  cmd=( "${arr[@]:1}" )

  ( 
    eval "${cmd[@]}" &
    child=$!

    echo "child: $child"
    trap -- "" SIGTERM 
    (       
      sleep "$timeout"
      kill "$child" 2> /dev/null 
    ) &     
    wait "$child"
  )
}
####################

function sleep_func() {
  local secs
  local waitsec

  waitsec=1
  secs=$(($1))
  while [ "$secs" -gt 0 ]; do
   echo -ne "$secs\033[0K\r"
   sleep "$waitsec"
   secs=$((secs-waitsec))
  done

}

command=("wrap_run" \
         "sleep_func" "${SLEEP_TIME}"
         )

for i in $(seq 1 "$REPEAT"); do
  echo "Try no: $i"

  if [ "$TIMEOUT" -gt 0 ]; then
    echo "  - Set timeout to: $TIMEOUT"
    set +e
    timeout_cmd "$TIMEOUT" "${command[@]}"
    retval="$?"
    set -e

    echo "    -> retval: $retval"
    # check if (retval % 128) == SIGTERM (== 15)
    if [[ "$((retval % 128))" -eq 15 ]]; then
      echo "    -> The command timed out"
    fi
  else
    echo "  - No timeout"
    "${command[@]}"
    retval="$?"
  fi
done

echo "Done!"

exit 0

C++, How to determine if a Windows Process is running?

I found this today, it is from 2003. It finds a process by name, you don't even need the pid.

\#include windows.h

\#include tlhelp32.h

\#include iostream.h

int FIND_PROC_BY_NAME(const char *);

int main(int argc, char *argv[])

{

//  Check whether a process is currently running, or not

char szName[100]="notepad.exe";   // Name of process to find

int isRunning;

    isRunning=FIND_PROC_BY_NAME(szName);

    // Note: isRunning=0 means process not found, =1 means yes, it is found in memor
    return isRunning;
}

int FIND_PROC_BY_NAME(const char *szToFind)

// Created: 12/29/2000  (RK)

// Last modified: 6/16/2003  (RK)

// Please report any problems or bugs to [email protected]

// The latest version of this routine can be found at:

//     http://www.neurophys.wisc.edu/ravi/software/killproc/

// Check whether the process "szToFind" is currently running in memory

// This works for Win/95/98/ME and also Win/NT/2000/XP

// The process name is case-insensitive, i.e. "notepad.exe" and "NOTEPAD.EXE"

// will both work (for szToFind)

// Return codes are as follows:

//   0   = Process was not found

//   1   = Process was found

//   605 = Unable to search for process

//   606 = Unable to identify system type

//   607 = Unsupported OS

//   632 = Process name is invalid

// Change history:

//  3/10/2002   - Fixed memory leak in some cases (hSnapShot and

//                and hSnapShotm were not being closed sometimes)

//  6/13/2003   - Removed iFound (was not being used, as pointed out

//                by John Emmas)

{

    BOOL bResult,bResultm;
    DWORD aiPID[1000],iCb=1000,iNumProc,iV2000=0;
    DWORD iCbneeded,i;
    char szName[MAX_PATH],szToFindUpper[MAX_PATH];
    HANDLE hProc,hSnapShot,hSnapShotm;
    OSVERSIONINFO osvi;
    HINSTANCE hInstLib;
    int iLen,iLenP,indx;
    HMODULE hMod;
    PROCESSENTRY32 procentry;      
    MODULEENTRY32 modentry;

    // PSAPI Function Pointers.
     BOOL (WINAPI *lpfEnumProcesses)( DWORD *, DWORD cb, DWORD * );
     BOOL (WINAPI *lpfEnumProcessModules)( HANDLE, HMODULE *,
        DWORD, LPDWORD );
     DWORD (WINAPI *lpfGetModuleBaseName)( HANDLE, HMODULE,
        LPTSTR, DWORD );

      // ToolHelp Function Pointers.
      HANDLE (WINAPI *lpfCreateToolhelp32Snapshot)(DWORD,DWORD) ;
      BOOL (WINAPI *lpfProcess32First)(HANDLE,LPPROCESSENTRY32) ;
      BOOL (WINAPI *lpfProcess32Next)(HANDLE,LPPROCESSENTRY32) ;
      BOOL (WINAPI *lpfModule32First)(HANDLE,LPMODULEENTRY32) ;
      BOOL (WINAPI *lpfModule32Next)(HANDLE,LPMODULEENTRY32) ;

    // Transfer Process name into "szToFindUpper" and
    // convert it to upper case
    iLenP=strlen(szToFind);
    if(iLenP<1 || iLenP>MAX_PATH) return 632;
    for(indx=0;indx<iLenP;indx++)
        szToFindUpper[indx]=toupper(szToFind[indx]);
    szToFindUpper[iLenP]=0;

    // First check what version of Windows we're in
    osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
    bResult=GetVersionEx(&osvi);
    if(!bResult)     // Unable to identify system version
        return 606;

    // At Present we only support Win/NT/2000 or Win/9x/ME
    if((osvi.dwPlatformId != VER_PLATFORM_WIN32_NT) &&
        (osvi.dwPlatformId != VER_PLATFORM_WIN32_WINDOWS))
        return 607;

    if(osvi.dwPlatformId==VER_PLATFORM_WIN32_NT)
    {
        // Win/NT or 2000 or XP

         // Load library and get the procedures explicitly. We do
         // this so that we don't have to worry about modules using
         // this code failing to load under Windows 95, because
         // it can't resolve references to the PSAPI.DLL.
         hInstLib = LoadLibraryA("PSAPI.DLL");
         if(hInstLib == NULL)
            return 605;

         // Get procedure addresses.
         lpfEnumProcesses = (BOOL(WINAPI *)(DWORD *,DWORD,DWORD*))
            GetProcAddress( hInstLib, "EnumProcesses" ) ;
         lpfEnumProcessModules = (BOOL(WINAPI *)(HANDLE, HMODULE *,
            DWORD, LPDWORD)) GetProcAddress( hInstLib,
            "EnumProcessModules" ) ;
         lpfGetModuleBaseName =(DWORD (WINAPI *)(HANDLE, HMODULE,
            LPTSTR, DWORD )) GetProcAddress( hInstLib,
            "GetModuleBaseNameA" ) ;

         if( lpfEnumProcesses == NULL ||
            lpfEnumProcessModules == NULL ||
            lpfGetModuleBaseName == NULL)
            {
               FreeLibrary(hInstLib);
               return 605;
            }

        bResult=lpfEnumProcesses(aiPID,iCb,&iCbneeded);
        if(!bResult)
        {
            // Unable to get process list, EnumProcesses failed
            FreeLibrary(hInstLib);
            return 605;
        }

        // How many processes are there?
        iNumProc=iCbneeded/sizeof(DWORD);

        // Get and match the name of each process
        for(i=0;i<iNumProc;i++)
        {
            // Get the (module) name for this process

            strcpy(szName,"Unknown");
            // First, get a handle to the process
            hProc=OpenProcess(PROCESS_QUERY_INFORMATION|PROCESS_VM_READ,FALSE,
                aiPID[i]);
            // Now, get the process name
            if(hProc)
            {
               if(lpfEnumProcessModules(hProc,&hMod,sizeof(hMod),&iCbneeded) )
               {
                  iLen=lpfGetModuleBaseName(hProc,hMod,szName,MAX_PATH);
               }
            }
            CloseHandle(hProc);
            // Match regardless of lower or upper case
            if(strcmp(_strupr(szName),szToFindUpper)==0)
            {
                // Process found
                FreeLibrary(hInstLib);
                return 1;
            }
        }
    }

    if(osvi.dwPlatformId==VER_PLATFORM_WIN32_WINDOWS)
    {
        // Win/95 or 98 or ME

        hInstLib = LoadLibraryA("Kernel32.DLL");
        if( hInstLib == NULL )
            return FALSE ;

        // Get procedure addresses.
        // We are linking to these functions of Kernel32
        // explicitly, because otherwise a module using
        // this code would fail to load under Windows NT,
        // which does not have the Toolhelp32
        // functions in the Kernel 32.
        lpfCreateToolhelp32Snapshot=
            (HANDLE(WINAPI *)(DWORD,DWORD))
            GetProcAddress( hInstLib,
            "CreateToolhelp32Snapshot" ) ;
        lpfProcess32First=
            (BOOL(WINAPI *)(HANDLE,LPPROCESSENTRY32))
            GetProcAddress( hInstLib, "Process32First" ) ;
        lpfProcess32Next=
            (BOOL(WINAPI *)(HANDLE,LPPROCESSENTRY32))
            GetProcAddress( hInstLib, "Process32Next" ) ;
        lpfModule32First=
            (BOOL(WINAPI *)(HANDLE,LPMODULEENTRY32))
            GetProcAddress( hInstLib, "Module32First" ) ;
        lpfModule32Next=
            (BOOL(WINAPI *)(HANDLE,LPMODULEENTRY32))
            GetProcAddress( hInstLib, "Module32Next" ) ;
        if( lpfProcess32Next == NULL ||
            lpfProcess32First == NULL ||
            lpfModule32Next == NULL ||
            lpfModule32First == NULL ||
            lpfCreateToolhelp32Snapshot == NULL )
        {
            FreeLibrary(hInstLib);
            return 605;
        }

        // The Process32.. and Module32.. routines return names in all uppercase

        // Get a handle to a Toolhelp snapshot of all the systems processes.

        hSnapShot = lpfCreateToolhelp32Snapshot(
            TH32CS_SNAPPROCESS, 0 ) ;
        if( hSnapShot == INVALID_HANDLE_VALUE )
        {
            FreeLibrary(hInstLib);
            return 605;
        }

        // Get the first process' information.
        procentry.dwSize = sizeof(PROCESSENTRY32);
        bResult=lpfProcess32First(hSnapShot,&procentry);

        // While there are processes, keep looping and checking.
        while(bResult)
        {
            // Get a handle to a Toolhelp snapshot of this process.
            hSnapShotm = lpfCreateToolhelp32Snapshot(
                TH32CS_SNAPMODULE, procentry.th32ProcessID) ;
            if( hSnapShotm == INVALID_HANDLE_VALUE )
            {
                CloseHandle(hSnapShot);
                FreeLibrary(hInstLib);
                return 605;
            }
            // Get the module list for this process
            modentry.dwSize=sizeof(MODULEENTRY32);
            bResultm=lpfModule32First(hSnapShotm,&modentry);

            // While there are modules, keep looping and checking
            while(bResultm)
            {
                if(strcmp(modentry.szModule,szToFindUpper)==0)
                {
                    // Process found
                    CloseHandle(hSnapShotm);
                    CloseHandle(hSnapShot);
                    FreeLibrary(hInstLib);
                    return 1;
                }
                else
                {  // Look for next modules for this process
                    modentry.dwSize=sizeof(MODULEENTRY32);
                    bResultm=lpfModule32Next(hSnapShotm,&modentry);
                }
            }

            //Keep looking
            CloseHandle(hSnapShotm);
            procentry.dwSize = sizeof(PROCESSENTRY32);
            bResult = lpfProcess32Next(hSnapShot,&procentry);
        }
        CloseHandle(hSnapShot);
    }
    FreeLibrary(hInstLib);
    return 0;

}

How do I check if a given Python string is a substring of another one?

Try using in like this:

>>> x = 'hello'
>>> y = 'll'
>>> y in x
True

IIS Config Error - This configuration section cannot be used at this path

Heres what worked for me, had a similar problem on my new laptop which had windows 10.

  • Search for "Turn windows features on or off"
  • Check "Internet Information Services"
  • Check "World Wide Web Services"
  • Check "Application Development Features"
  • Enable all items under this

try again, now it should work.

What is an application binary interface (ABI)?

ABI - Application Binary Interface is about a machine code communication in runtime between two binary parts like - application, library, OS... ABI describes how objects are saved in memory, how functions are called(calling convention), mangling...

A good example of API and ABI is iOS ecosystem with Swift language.

  • Application layer - When you create an application using different languages. For example you can create application using Swift and Objective-C[Mixing Swift and Objective-C]

  • Application - OS layer - runtime - Swift runtime and standard libraries are parts of OS and they should not be included into each bundle(e.g. app, framework). It is the same as like Objective-C uses

  • Library layer - Module Stability case - compile time - you will be able to import a framework which was built with another version of Swift's compiler. It means that it is safety to create a closed-source(pre-build) binary which will be consumed by a different version of compiler( .swiftinterface is used with .swiftmodule) and you will not get

    Module compiled with _ cannot be imported by the _ compiler
    
  • Library layer - Library Evolution case

    1. Compile time - if a dependency was changed, a client has not to be recompiled.
    2. Runtime - a system library or a dynamic framework can be hot-swapped by a new one.

[API vs ABI]
[Swift Module and Library stability]

What is JSONP, and why was it created?

JSONP is a great away to get around cross-domain scripting errors. You can consume a JSONP service purely with JS without having to implement a AJAX proxy on the server side.

You can use the b1t.co service to see how it works. This is a free JSONP service that alllows you to minify your URLs. Here is the url to use for the service:

http://b1t.co/Site/api/External/MakeUrlWithGet?callback=[resultsCallBack]&url=[escapedUrlToMinify]

For example the call, http://b1t.co/Site/api/External/MakeUrlWithGet?callback=whateverJavascriptName&url=google.com

would return

whateverJavascriptName({"success":true,"url":"http://google.com","shortUrl":"http://b1t.co/54"});

And thus when that get's loaded in your js as a src, it will automatically run whateverJavascriptName which you should implement as your callback function:

function minifyResultsCallBack(data)
{
    document.getElementById("results").innerHTML = JSON.stringify(data);
}

To actually make the JSONP call, you can do it about several ways (including using jQuery) but here is a pure JS example:

function minify(urlToMinify)
{
   url = escape(urlToMinify);
   var s = document.createElement('script');
   s.id = 'dynScript';
   s.type='text/javascript';
   s.src = "http://b1t.co/Site/api/External/MakeUrlWithGet?callback=resultsCallBack&url=" + url;
   document.getElementsByTagName('head')[0].appendChild(s);
}

A step by step example and a jsonp web service to practice on is available at: this post

How do I download the Android SDK without downloading Android Studio?

To download the SDK over command line, the link has changed slightly than previously mentioned:

wget --quiet --output-document=/tmp/sdk-tools-linux.zip https://dl.google.com/android/repository/commandlinetools-linux-${ANDROID_SDK_TOOLS}.zip

Latest version listed on the downloads page.

Stop jQuery .load response from being cached

/**
 * Use this function as jQuery "load" to disable request caching in IE
 * Example: $('selector').loadWithoutCache('url', function(){ //success function callback... });
 **/
$.fn.loadWithoutCache = function (){
 var elem = $(this);
 var func = arguments[1];
 $.ajax({
     url: arguments[0],
     cache: false,
     dataType: "html",
     success: function(data, textStatus, XMLHttpRequest) {
   elem.html(data);
   if(func != undefined){
    func(data, textStatus, XMLHttpRequest);
   }
     }
 });
 return elem;
}

Debug assertion failed. C++ vector subscript out of range

this type of error usually occur when you try to access data through the index in which data data has not been assign. for example

//assign of data in to array
for(int i=0; i<10; i++){
   arr[i]=i;
}
//accessing of data through array index
for(int i=10; i>=0; i--){
cout << arr[i];
}

the code will give error (vector subscript out of range) because you are accessing the arr[10] which has not been assign yet.

Finding local IP addresses using Python's stdlib

This will work on most linux boxes:

import socket, subprocess, re
def get_ipv4_address():
    """
    Returns IP address(es) of current machine.
    :return:
    """
    p = subprocess.Popen(["ifconfig"], stdout=subprocess.PIPE)
    ifc_resp = p.communicate()
    patt = re.compile(r'inet\s*\w*\S*:\s*(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})')
    resp = patt.findall(ifc_resp[0])
    print resp

get_ipv4_address()

Transactions in .net

if you just need it for db-related stuff, some OR Mappers (e.g. NHibernate) support transactinos out of the box per default.

Use LIKE %..% with field values in MySQL

  SELECT t1.a, t2.b
  FROM t1
  JOIN t2 ON t1.a LIKE '%'+t2.b +'%'

because the last answer not work

GitHub: invalid username or password

I have got the success using the following commands.

git config --unset-all credential.helper
git config --global --unset-all credential.helper
git config --system --unset-all credential.helper

Try and let me know if these are working for you.

How do you uninstall all dependencies listed in package.json (NPM)?

I recently found a node command that allows uninstalling all the development dependencies as follows:

npm prune --production

As I mentioned, this command only uninstalls the development dependency packages. At least it helped me not to have to do it manually.

How can I use xargs to copy files that have spaces and quotes in their names?

bill_starr's Perl version won't work well for embedded newlines (only copes with spaces). For those on e.g. Solaris where you don't have the GNU tools, a more complete version might be (using sed)...

find -type f | sed 's/./\\&/g' | xargs grep string_to_find

adjust the find and grep arguments or other commands as you require, but the sed will fix your embedded newlines/spaces/tabs.

How to change port for jenkins window service when 8080 is being used

  1. Go to the directory where you installed Jenkins (by default, it's under Program Files/Jenkins)
  2. Open the Jenkins.xml configuration file
  3. Search --httpPort=8080 and replace the 8080 with the new port number that you wish
  4. Restart Jenkins for changes to take effect

Converting Columns into rows with their respective data in sql server

DECLARE @TABLE TABLE 
  (RowNo INT,ScripName  VARCHAR(10),ScripCode  VARCHAR(10)
  ,Price  VARCHAR(10))      
INSERT INTO @TABLE VALUES
  (1,'20 MICRONS ','533022','39')
SELECT ColumnName,ColumnValue from @Table
 Unpivot(ColumnValue For ColumnName IN (ScripName,ScripCode,Price)) AS H

How do I show/hide a UIBarButtonItem?

It is possible to hide a button in place without changing its width or removing it from the bar. If you set the style to plain, remove the title, and disable the button, it will disappear. To restore it, just reverse your changes.

-(void)toggleBarButton:(bool)show
{
    if (show) {
        btn.style = UIBarButtonItemStyleBordered;
        btn.enabled = true;
        btn.title = @"MyTitle";
    } else {
        btn.style = UIBarButtonItemStylePlain;
        btn.enabled = false;
        btn.title = nil;
    }
}

How to compare two double values in Java?

        int mid = 10;
        for (double j = 2 * mid; j >= 0; j = j - 0.1) {
            if (j == mid) {
                System.out.println("Never happens"); // is NOT printed
            }

            if (Double.compare(j, mid) == 0) {
                System.out.println("No way!"); // is NOT printed
            }

            if (Math.abs(j - mid) < 1e-6) {
                System.out.println("Ha!"); // printed
            }
        }
        System.out.println("Gotcha!");

How to set javascript variables using MVC4 with Razor

I've been looking into this approach:

function getServerObject(serverObject) {
  if (typeof serverObject === "undefined") {
    return null;
  }
  return serverObject;
}

var itCameFromDotNet = getServerObject(@dotNetObject);

To me this seems to make it safer on the JS side... worst case you end up with a null variable.

How to resolve "git pull,fatal: unable to access 'https://github.com...\': Empty reply from server"

I solved such a problem by replacing https part of my remote origin with http. It is also a workaround. I think it may help someone in the future.

WorksheetFunction.CountA - not working post upgrade to Office 2010

This answer from another forum solved the problem.

(substitute your own range for the "I:I" shown here)

Re: CountA not working in VBA

Should be:

Nonblank = Application.WorksheetFunction.CountA(Range("I:I"))

You have to refer to ranges in the vba format, not the in-excel format.

How can I create an array with key value pairs?

My PHP is a little rusty, but I believe you're looking for indexed assignment. Simply use:

$catList[$row["datasource_id"]] = $row["title"];

In PHP arrays are actually maps, where the keys can be either integers or strings. Check out PHP: Arrays - Manual for more information.

Does Git Add have a verbose switch

You can use git add -i to get an interactive version of git add, although that's not exactly what you're after. The simplest thing to do is, after having git added, use git status to see what is staged or not.

Using git add . isn't really recommended unless it's your first commit. It's usually better to explicitly list the files you want staged, so that you don't start tracking unwanted files accidentally (temp files and such).

Find the maximum value in a list of tuples in Python

You could loop through the list and keep the tuple in a variable and then you can see both values from the same variable...

num=(0, 0)
for item in tuplelist:
  if item[1]>num[1]:
    num=item #num has the whole tuple with the highest y value and its x value

no suitable HttpMessageConverter found for response type

You can make up a class, RestTemplateXML, which extends RestTemplate. Then override doExecute(URI, HttpMethod, RequestCallback, ResponseExtractor<T>), and explicitly get response-headers and set content-type to application/xml.

Now Spring reads the headers and knows that it is `application/xml'. It is kind of a hack but it works.

public class RestTemplateXML extends RestTemplate {

  @Override
  protected <T> T doExecute(URI url, HttpMethod method, RequestCallback requestCallback,
        ResponseExtractor<T> responseExtractor) throws RestClientException {

     logger.info( RestTemplateXML.class.getSuperclass().getSimpleName() + ".doExecute() is overridden");

     Assert.notNull(url, "'url' must not be null");
     Assert.notNull(method, "'method' must not be null");
     ClientHttpResponse response = null;
     try {
        ClientHttpRequest request = createRequest(url, method);
        if (requestCallback != null) {
           requestCallback.doWithRequest(request);
        }
        response = request.execute();

        // Set ContentType to XML
        response.getHeaders().setContentType(MediaType.APPLICATION_XML);

        if (!getErrorHandler().hasError(response)) {
           logResponseStatus(method, url, response);
        }
        else {
           handleResponseError(method, url, response);
        }
        if (responseExtractor != null) {
           return responseExtractor.extractData(response);
        }
        else {
           return null;
        }
     }
     catch (IOException ex) {
        throw new ResourceAccessException("I/O error on " + method.name() +
              " request for \"" + url + "\":" + ex.getMessage(), ex);
     }
     finally {
        if (response != null) {
           response.close();
        }
     }

  }

  private void logResponseStatus(HttpMethod method, URI url, ClientHttpResponse response) {
     if (logger.isDebugEnabled()) {
        try {
           logger.debug(method.name() + " request for \"" + url + "\" resulted in " +
                 response.getRawStatusCode() + " (" + response.getStatusText() + ")");
        }
        catch (IOException e) {
           // ignore
        }
     }
  }

  private void handleResponseError(HttpMethod method, URI url, ClientHttpResponse response) throws IOException {
     if (logger.isWarnEnabled()) {
        try {
           logger.warn(method.name() + " request for \"" + url + "\" resulted in " +
                 response.getRawStatusCode() + " (" + response.getStatusText() + "); invoking error handler");
        }
        catch (IOException e) {
           // ignore
        }
     }
     getErrorHandler().handleError(response);
  }
}

Python: List vs Dict for look up table

You want a dict.

For (unsorted) lists in Python, the "in" operation requires O(n) time---not good when you have a large amount of data. A dict, on the other hand, is a hash table, so you can expect O(1) lookup time.

As others have noted, you might choose a set (a special type of dict) instead, if you only have keys rather than key/value pairs.

Related:

  • Python wiki: information on the time complexity of Python container operations.
  • SO: Python container operation time and memory complexities

Creating temporary files in Android

Best practices on internal and external temporary files:

Internal Cache

If you'd like to cache some data, rather than store it persistently, you should use getCacheDir() to open a File that represents the internal directory where your application should save temporary cache files.

When the device is low on internal storage space, Android may delete these cache files to recover space. However, you should not rely on the system to clean up these files for you. You should always maintain the cache files yourself and stay within a reasonable limit of space consumed, such as 1MB. When the user uninstalls your application, these files are removed.

External Cache

To open a File that represents the external storage directory where you should save cache files, call getExternalCacheDir(). If the user uninstalls your application, these files will be automatically deleted.

Similar to ContextCompat.getExternalFilesDirs(), mentioned above, you can also access a cache directory on a secondary external storage (if available) by calling ContextCompat.getExternalCacheDirs().

Tip: To preserve file space and maintain your app's performance, it's important that you carefully manage your cache files and remove those that aren't needed anymore throughout your app's lifecycle.

How do I use CSS with a ruby on rails application?

To add to the above, the most obvious place to add stylesheet_link_tag is in your global application layout - application.html.erb.

Squash the first two commits in Git?

Update July 2012 (git 1.7.12+)

You now can rebase all commits up to root, and select the second commit Y to be squashed with the first X.

git rebase -i --root master

pick sha1 X
squash sha1 Y
pick sha1 Z
git rebase [-i] --root $tip

This command can now be used to rewrite all the history leading from "$tip" down to the root commit.

See commit df5df20c1308f936ea542c86df1e9c6974168472 on GitHub from Chris Webb (arachsys).


Original answer (February 2009)

I believe you will find different recipes for that in the SO question "How do I combine the first two commits of a git repository?"

Charles Bailey provided there the most detailed answer, reminding us that a commit is a full tree (not just diffs from a previous states).
And here the old commit (the "initial commit") and the new commit (result of the squashing) will have no common ancestor.
That mean you can not "commit --amend" the initial commit into new one, and then rebase onto the new initial commit the history of the previous initial commit (lots of conflicts)

(That last sentence is no longer true with git rebase -i --root <aBranch>)

Rather (with A the original "initial commit", and B a subsequent commit needed to be squashed into the initial one):

  1. Go back to the last commit that we want to form the initial commit (detach HEAD):

    git checkout <sha1_for_B>
    
  2. Reset the branch pointer to the initial commit, but leaving the index and working tree intact:

    git reset --soft <sha1_for_A>
    
  3. Amend the initial tree using the tree from 'B':

    git commit --amend
    
  4. Temporarily tag this new initial commit (or you could remember the new commit sha1 manually):

    git tag tmp
    
  5. Go back to the original branch (assume master for this example):

    git checkout master
    
  6. Replay all the commits after B onto the new initial commit:

    git rebase --onto tmp <sha1_for_B>
    
  7. Remove the temporary tag:

    git tag -d tmp
    

That way, the "rebase --onto" does not introduce conflicts during the merge, since it rebases history made after the last commit (B) to be squashed into the initial one (which was A) to tmp (representing the squashed new initial commit): trivial fast-forward merges only.

That works for "A-B", but also "A-...-...-...-B" (any number of commits can be squashed into the initial one this way)

Javascript Uncaught TypeError: Cannot read property '0' of undefined

The error is here:

hasLetter("a",words[]);

You are passing the first item of words, instead of the array.

Instead, pass the array to the function:

hasLetter("a",words);

Problem solved!


Here's a breakdown of what the problem was:

I'm guessing in your browser (chrome throws a different error), words[] == words[0], so when you call hasLetter("a",words[]);, you are actually calling hasLetter("a",words[0]);. So, in essence, you are passing the first item of words to your function, not the array as a whole.

Of course, because words is just an empty array, words[0] is undefined. Therefore, your function call is actually:

hasLetter("a", undefined);

which means that, when you try to access d[ascii], you are actually trying to access undefined[0], hence the error.

How to make input type= file Should accept only pdf and xls

Unfortunately, there is no guaranteed way to do it at time of selection.

Some browsers support the accept attribute for input tags. This is a good start, but cannot be relied upon completely.

<input type="file" name="pic" id="pic" accept="image/gif, image/jpeg" />

You can use a cfinput and run a validation to check the file extension at submission, but not the mime-type. This is better, but still not fool-proof. Files on OSX often have no file extensions or users could maliciously mislabel the file types.

ColdFusion's cffile can check the mime-type using the contentType property of the result (cffile.contentType), but that can only be done after the upload. This is your best bet, but is still not 100% safe as mime-types could still be wrong.

Time part of a DateTime Field in SQL

you can use CONVERT(TIME,GETDATE()) in this case:

INSERT INTO infoTbl
(itDate, itTime)
VALUES (GETDATE(),CONVERT(TIME,GETDATE()))

or if you want print it or return that time use like this:

DECLARE @dt TIME
SET @dt = CONVERT(TIME,GETDATE())
PRINT @dt

Publish to IIS, setting Environment Variable

I have modified the answer which @Christian Del Bianco is given. I changed the process for .net core 2 and upper as project.json file now absolute.

  1. First, create appsettings.json file in root directory. with the content

      {
         // Possible string values reported below. When empty it use ENV 
            variable value or Visual Studio setting.
         // - Production
         // - Staging
         // - Test
        // - Development
       "ASPNETCORE_ENVIRONMENT": "Development"
     }
    
  2. Then create another two setting file appsettings.Development.json and appsettings.Production.json with the necessary configuration.

  3. Add necessary code to set up the environment to Program.cs file.

    public class Program
    {
    public static void Main(string[] args)
    {
        var logger = NLogBuilder.ConfigureNLog("nlog.config").GetCurrentClassLogger();
    
      ***var currentDirectoryPath = Directory.GetCurrentDirectory();
        var envSettingsPath = Path.Combine(currentDirectoryPath, "envsettings.json");
        var envSettings = JObject.Parse(File.ReadAllText(envSettingsPath));
        var enviromentValue = envSettings["ASPNETCORE_ENVIRONMENT"].ToString();***
    
        try
        {
            ***CreateWebHostBuilder(args, enviromentValue).Build().Run();***
        }
        catch (Exception ex)
        {
            //NLog: catch setup errors
            logger.Error(ex, "Stopped program because of setup related exception");
            throw;
        }
        finally
        {
            NLog.LogManager.Shutdown();
        }
    }
    
    public static IWebHostBuilder CreateWebHostBuilder(string[] args, string enviromentValue) =>
        WebHost.CreateDefaultBuilder(args)
            .UseStartup<Startup>()
            .ConfigureLogging(logging =>
            {
                logging.ClearProviders();
                logging.SetMinimumLevel(Microsoft.Extensions.Logging.LogLevel.Trace);
            })
            .UseNLog()
            ***.UseEnvironment(enviromentValue);***
    

    }

  4. Add the envsettings.json to your .csproj file for copy to published directory.

       <ItemGroup>
            <None Include="envsettings.json" CopyToPublishDirectory="Always" />
        </ItemGroup>
    
  5. Now just change the ASPNETCORE_ENVIRONMENT as you want in envsettings.json file and published.

FragmentActivity to Fragment

first of all;

a Fragment must be inside a FragmentActivity, that's the first rule,

a FragmentActivity is quite similar to a standart Activity that you already know, besides having some Fragment oriented methods

second thing about Fragments, is that there is one important method you MUST call, wich is onCreateView, where you inflate your layout, think of it as the setContentLayout

here is an example:

    @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {     mView       = inflater.inflate(R.layout.fragment_layout, container, false);       return mView; } 

and continu your work based on that mView, so to find a View by id, call mView.findViewById(..);


for the FragmentActivity part:

the xml part "must" have a FrameLayout in order to inflate a fragment in it

        <FrameLayout             android:id="@+id/content_frame"             android:layout_width="match_parent"             android:layout_height="match_parent"  >         </FrameLayout> 

as for the inflation part

getSupportFragmentManager().beginTransaction().replace(R.id.content_frame, new YOUR_FRAGMENT, "TAG").commit();


begin with these, as there is tons of other stuf you must know about fragments and fragment activities, start of by reading something about it (like life cycle) at the android developer site

Netbeans - class does not have a main method

Make sure it is

public static void main(String[] argv)

No other signature will do.

Create a unique number with javascript time

100% guaranteed to generate a different number...

_x000D_
_x000D_
var Q;_x000D_
Q = {};_x000D_
Q.timeInterval;_x000D_
_x000D_
function genUniqueID(kol) {_x000D_
 Q.timeInterval = setTimeout(function() {_x000D_
  document.querySelector('#demo').innerHTML += new Date().valueOf() + '<br>';_x000D_
  kol--;_x000D_
  if (kol > 0) {_x000D_
   genUniqueID(kol);_x000D_
  }_x000D_
 }, document.querySelector('#i2').value);_x000D_
}
_x000D_
<div><input id="i1" type="number" value="5" style="width: 60px;"><label> - Amount</label><br>_x000D_
    <input id="i2" type="number" value="10" style="width: 60px;"><label> - Millisecond interval</label></div><br>_x000D_
<div>_x000D_
    <button onclick="genUniqueID(document.querySelector('#i1').value);">Start</button>_x000D_
    <button onclick="clearTimeout(Q.timeInterval);">Stop</button>_x000D_
    <button onclick="document.querySelector('#demo').innerHTML = ''">Clear</button>_x000D_
</div><br>_x000D_
<div id="demo"></div>
_x000D_
_x000D_
_x000D_

utf-8 special characters not displaying

If you're using PHP and none of the above worked (as it was my case), you need to set the locale with utf-8 encoding.

Like this

setlocale(LC_ALL, 'fr_CA.utf-8');

Converting data frame column from character to numeric

If we need only one column to be numeric

yyz$b <- as.numeric(as.character(yyz$b))

But, if all the columns needs to changed to numeric, use lapply to loop over the columns and convert to numeric by first converting it to character class as the columns were factor.

yyz[] <- lapply(yyz, function(x) as.numeric(as.character(x)))

Both the columns in the OP's post are factor because of the string "n/a". This could be easily avoided while reading the file using na.strings = "n/a" in the read.table/read.csv or if we are using data.frame, we can have character columns with stringsAsFactors=FALSE (the default is stringsAsFactors=TRUE)


Regarding the usage of apply, it converts the dataset to matrix and matrix can hold only a single class. To check the class, we need

lapply(yyz, class)

Or

sapply(yyz, class)

Or check

str(yyz)

What is a Python egg?

Python eggs are a way of bundling additional information with a Python project, that allows the project's dependencies to be checked and satisfied at runtime, as well as allowing projects to provide plugins for other projects. There are several binary formats that embody eggs, but the most common is '.egg' zipfile format, because it's a convenient one for distributing projects. All of the formats support including package-specific data, project-wide metadata, C extensions, and Python code.

The easiest way to install and use Python eggs is to use the "Easy Install" Python package manager, which will find, download, build, and install eggs for you; all you do is tell it the name (and optionally, version) of the Python project(s) you want to use.

Python eggs can be used with Python 2.3 and up, and can be built using the setuptools package (see the Python Subversion sandbox for source code, or the EasyInstall page for current installation instructions).

The primary benefits of Python Eggs are:

  • They enable tools like the "Easy Install" Python package manager

  • .egg files are a "zero installation" format for a Python package; no build or install step is required, just put them on PYTHONPATH or sys.path and use them (may require the runtime installed if C extensions or data files are used)

  • They can include package metadata, such as the other eggs they depend on

  • They allow "namespace packages" (packages that just contain other packages) to be split into separate distributions (e.g. zope., twisted., peak.* packages can be distributed as separate eggs, unlike normal packages which must always be placed under the same parent directory. This allows what are now huge monolithic packages to be distributed as separate components.)

  • They allow applications or libraries to specify the needed version of a library, so that you can e.g. require("Twisted-Internet>=2.0") before doing an import twisted.internet.

  • They're a great format for distributing extensions or plugins to extensible applications and frameworks (such as Trac, which uses eggs for plugins as of 0.9b1), because the egg runtime provides simple APIs to locate eggs and find their advertised entry points (similar to Eclipse's "extension point" concept).

There are also other benefits that may come from having a standardized format, similar to the benefits of Java's "jar" format.

What process is listening on a certain port on Solaris?

#!/usr/bin/bash
# This is a little script based on the "pfiles" solution that prints the PID and PORT.

pfiles `ls /proc` 2>/dev/null | awk "/^[^ \\t]/{smatch=\$0;next}/port:[ \\t]*${1}/{print smatch, \$0}{next}"

Changing column names of a data frame

The error is caused by the "smart-quotes" (or whatever they're called). The lesson here is, "don't write your code in an 'editor' that converts quotes to smart-quotes".

names(newprice)[1]<-paste(“premium”)  # error
names(newprice)[1]<-paste("premium")  # works

Also, you don't need paste("premium") (the call to paste is redundant) and it's a good idea to put spaces around <- to avoid confusion (e.g. x <- -10; if(x<-3) "hi" else "bye"; x).

var.replace is not a function

My guess is that the code that's calling your trim function is not actually passing a string to it.

To fix this, you can make str a string, like this: str.toString().replace(...)
...as alper pointed out below.

how to place last div into right top corner of parent div? (css)

If you can add another wrapping div "block3" you could do something like this.

 <html>
      <head>
      <style type="text/css">
      .block1 {color:red;width:120px;border:1px solid green; height: 100px;}
      .block3 {float:left; width:10px;}
      .block2 {color:blue;width:70px;border:2px solid black;position:relative;float:right;}
      </style>
      </head>

    <body>
    <div class='block1'>

        <div class='block3'>
            <p>text1</p>
            <p>text2</p>
        </div>

        <div class='block2'>block2</DIV>

    </div>

    </body>
    </html>

Event for Handling the Focus of the EditText

when in kotlin it will look like this :

editText.setOnFocusChangeListener { view, hasFocus ->
        if (hasFocus) toast("focused") else toast("focuse lose")
    }

What tools do you use to test your public REST API?

We are using Groovy to test our RestFUL API, using a series of helper functions to build the xml put/post/gets and then a series of tests on the nodes of the XML to check that the data is manipulated correctly.

We use Poster (for Firefox, Chrome seems to be lacking a similar tool) for hand testing single areas, or simply to poll the API at times when we need to create further tests, or check the status of things.

How do you uninstall the package manager "pip", if installed from source?

I was using above command but it was not working. This command worked for me:

python -m pip uninstall pip setuptools

jQuery Validate Plugin - How to create a simple custom rule?

Thanks, it worked!

Here's the final code:

$.validator.addMethod("greaterThanZero", function(value, element) {
    var the_list_array = $("#some_form .super_item:checked");
    return the_list_array.length > 0;
}, "* Please check at least one check box");

How to get a pixel's x,y coordinate color from an image?

Canvas would be a great way to do this, as @pst said above. Check out this answer for a good example:

getPixel from HTML Canvas?

Some code that would serve you specifically as well:

var imgd = context.getImageData(x, y, width, height);
var pix = imgd.data;

for (var i = 0, n = pix.length; i < n; i += 4) {
  console.log pix[i+3]
}

This will go row by row, so you'd need to convert that into an x,y and either convert the for loop to a direct check or run a conditional inside.

Reading your question again, it looks like you want to be able to get the point that the person clicks on. This can be done pretty easily with jquery's click event. Just run the above code inside a click handler as such:

$('el').click(function(e){
   console.log(e.clientX, e.clientY)
}

Those should grab your x and y values.

XAMPP Start automatically on Windows 7 startup

Try to run Your XAMPP Control Panel as Run as administrator, then install Apache and MySQL.

enter image description here

When XAMPP opens, ensure that Apache and MySQL services are stopped.

enter image description here

Now just check/tick on Apache and Mysql service module.

enter image description here

Now Apache and MySQL will be added to window services. You can set these services to start when Windows boots.

How do I print colored output with Python 3?

This one answer I have got from the earlier python2 answers that is

  1. Install termcolor module.

    pip3 install termcolor

  2. Import the colored library from termcolor.

    from termcolor import colored

  3. Use the provided methods, below is an example.

    print(colored('hello', 'red'), colored('world', 'green'))

How to use mongoose findOne

Use obj[0].nick and you will get desired result,

git - Your branch is ahead of 'origin/master' by 1 commit

I resolved this by just running a simple:

git pull

Nothing more. Now it's showing:

# On branch master
nothing to commit, working directory clean

Can I try/catch a warning?

Set and restore error handler

One possibility is to set your own error handler before the call and restore the previous error handler later with restore_error_handler().

set_error_handler(function() { /* ignore errors */ });
dns_get_record();
restore_error_handler();

You could build on this idea and write a re-usable error handler that logs the errors for you.

set_error_handler([$logger, 'onSilencedError']);
dns_get_record();
restore_error_handler();

Turning errors into exceptions

You can use set_error_handler() and the ErrorException class to turn all php errors into exceptions.

set_error_handler(function($errno, $errstr, $errfile, $errline) {
    // error was suppressed with the @-operator
    if (0 === error_reporting()) {
        return false;
    }
    
    throw new ErrorException($errstr, 0, $errno, $errfile, $errline);
});

try {
    dns_get_record();
} catch (ErrorException $e) {
    // ...
}

The important thing to note when using your own error handler is that it will bypass the error_reporting setting and pass all errors (notices, warnings, etc.) to your error handler. You can set a second argument on set_error_handler() to define which error types you want to receive, or access the current setting using ... = error_reporting() inside the error handler.

Suppressing the warning

Another possibility is to suppress the call with the @ operator and check the return value of dns_get_record() afterwards. But I'd advise against this as errors/warnings are triggered to be handled, not to be suppressed.

What's the difference between .NET Core, .NET Framework, and Xamarin?

.NET 5 will be a unified version of all .NET variants coming in November 2020, so there will be no need to choose between variants anymore. enter image description here

Logging best practices

As far as aspect oriented logging is concerned I was recommended PostSharp on another SO question -

Aspect Oriented Logging with Unity\T4\anything else

The link provided in the answer is worth visiting if you are evaluating logging frameworks.

The FastCGI process exited unexpectedly

I tried opening php-cgi.exe directly and it gave me a more clear error message.

Can I call jQuery's click() to follow an <a> link if I haven't bound an event handler to it with bind or click already?

Interesting, this is probably a "feature request" (ie bug) for jQuery. The jQuery click event only triggers the click action (called onClick event on the DOM) on the element if you bind a jQuery event to the element. You should go to jQuery mailing lists ( http://forum.jquery.com/ ) and report this. This might be the wanted behavior, but I don't think so.

EDIT:

I did some testing and what you said is wrong, even if you bind a function to an 'a' tag it still doesn't take you to the website specified by the href attribute. Try the following code:

<html>
<head>

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js"></script>
 <script>
  $(document).ready(function() {
   /* Try to dis-comment this:
   $('#a').click(function () {
    alert('jQuery.click()');
    return true;
   });
   */
  });
  function button_onClick() {
   $('#a').click();
  }
  function a_onClick() {
   alert('a_onClick');
  }
 </script>

</head>
<body>
 <input type="button" onclick="button_onClick()">
 <br>
 <a id='a' href='http://www.google.com' onClick="a_onClick()"> aaa </a>

</body>
</html> 

It never goes to google.com unless you directly click on the link (with or without the commented code). Also notice that even if you bind the click event to the link it still doesn't go purple once you click the button. It only goes purple if you click the link directly.

I did some research and it seems that the .click is not suppose to work with 'a' tags because the browser does not suport "fake clicking" with javascript. I mean, you can't "click" an element with javascript. With 'a' tags you can trigger its onClick event but the link won't change colors (to the visited link color, the default is purple in most browsers). So it wouldn't make sense to make the $().click event work with 'a' tags since the act of going to the href attribute is not a part of the onClick event, but hardcoded in the browser.

Bootstrap Dropdown with Hover

The easiest solution would be in CSS. Add something like...

.dropdown:hover .dropdown-menu {
    display: block;
    margin-top: 0; // remove the gap so it doesn't close
 }

Working Fiddle

Seaborn plots not showing up

If you plot in IPython console (where you can't use %matplotlib inline) instead of Jupyter notebook, and don't want to run plt.show() repeatedly, you can start IPython console with ipython --pylab:

$ ipython --pylab     
Python 3.6.6 |Anaconda custom (64-bit)| (default, Jun 28 2018, 17:14:51) 
Type 'copyright', 'credits' or 'license' for more information
IPython 7.0.1 -- An enhanced Interactive Python. Type '?' for help.
Using matplotlib backend: Qt5Agg

In [1]: import seaborn as sns

In [2]: tips = sns.load_dataset("tips")

In [3]: sns.relplot(x="total_bill", y="tip", data=tips) # you can see the plot now

What is WEB-INF used for in a Java EE web application?

You should put in WEB-INF any pages, or pieces of pages, that you do not want to be public. Usually, JSP or facelets are found outside WEB-INF, but in this case they are easily accesssible for any user. In case you have some authorization restrictions, WEB-INF can be used for that.

WEB-INF/lib can contain 3rd party libraries which you do not want to pack at system level (JARs can be available for all the applications running on your server), but only for this particular applciation.

Generally speaking, many configurations files also go into WEB-INF.

As for WEB-INF/classes - it exists in any web-app, because that is the folder where all the compiled sources are placed (not JARS, but compiled .java files that you wrote yourself).

strange error in my Animation Drawable

Looks like whatever is in your Animation Drawable definition is too much memory to decode and sequence. The idea is that it loads up all the items and make them in an array and swaps them in and out of the scene according to the timing specified for each frame.

If this all can't fit into memory, it's probably better to either do this on your own with some sort of handler or better yet just encode a movie with the specified frames at the corresponding images and play the animation through a video codec.

What is the difference between CMD and ENTRYPOINT in a Dockerfile?

The accepted answer is fabulous in explaining the history. I find this table explain it very well from official doc on 'how CMD and ENTRYPOINT interact': enter image description here

How to change content on hover

The CSS content property along with ::after and ::before pseudo-elements have been introduced for this.

.item:hover a p.new-label:after{
    content: 'ADD';
}

JSFiddle Demo

How can I uninstall an application using PowerShell?

EDIT: Over the years this answer has gotten quite a few upvotes. I would like to add some comments. I have not used PowerShell since, but I remember observing some issues:

  1. If there are more matches than 1 for the below script, it does not work and you must append the PowerShell filter that limits results to 1. I believe it's -First 1 but I'm not sure. Feel free to edit.
  2. If the application is not installed by MSI it does not work. The reason it was written as below is because it modifies the MSI to uninstall without intervention, which is not always the default case when using the native uninstall string.

Using the WMI object takes forever. This is very fast if you just know the name of the program you want to uninstall.

$uninstall32 = gci "HKLM:\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall" | foreach { gp $_.PSPath } | ? { $_ -match "SOFTWARE NAME" } | select UninstallString
$uninstall64 = gci "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall" | foreach { gp $_.PSPath } | ? { $_ -match "SOFTWARE NAME" } | select UninstallString

if ($uninstall64) {
$uninstall64 = $uninstall64.UninstallString -Replace "msiexec.exe","" -Replace "/I","" -Replace "/X",""
$uninstall64 = $uninstall64.Trim()
Write "Uninstalling..."
start-process "msiexec.exe" -arg "/X $uninstall64 /qb" -Wait}
if ($uninstall32) {
$uninstall32 = $uninstall32.UninstallString -Replace "msiexec.exe","" -Replace "/I","" -Replace "/X",""
$uninstall32 = $uninstall32.Trim()
Write "Uninstalling..."
start-process "msiexec.exe" -arg "/X $uninstall32 /qb" -Wait}

Force a screen update in Excel VBA

This worked for me:

ActiveWindow.SmallScroll down:=0

or more simply:

ActiveWindow.SmallScroll 0

How to change DataTable columns order

We Can use this method for changing the column index but should be applied to all the columns if there are more than two number of columns otherwise it will show all the Improper values from data table....................

How do I implement charts in Bootstrap?

Definitely late to the party; anyway, for those interested, picking up on Lan's mention of HTML5 canvas, you can use gRaphaël Charting which has a MIT License (instead of HighCharts dual license). It's not Bootstrap-specific either, so it's more of a general suggestion.

I have to admit that HighCharts demos seem very pretty, and I have to warn that gRaphaël is quite hard to understand before becoming proficient with it. Anyway you can easily add nice features to your gRaphaël charts (say, tooltips or zooming effects), so it may be worth the effort.

Google Maps API v3: How to remove all markers?

Here you can find an example of how to remove markers:

https://developers.google.com/maps/documentation/javascript/examples/marker-remove?hl=es

// Add a marker to the map and push to the array.
function addMarker(location) {
  var marker = new google.maps.Marker({
    position: location,
    map: map
  });
  markers.push(marker);
}

// Sets the map on all markers in the array.
function setAllMap(map) {
  for (var i = 0; i < markers.length; i++) {
    markers[i].setMap(map);
   }
}

// Removes the markers from the map, but keeps them in the array.
function clearMarkers() {
  setAllMap(null);
}

// Deletes all markers in the array by removing references to them.
function deleteMarkers() {
  clearMarkers();
  markers = [];
}

How to create unit tests easily in eclipse

You can use my plug-in to create tests easily:

  1. highlight the method
  2. press Ctrl+Alt+Shift+U
  3. it will create the unit test for it.

The plug-in is available here. Hope this helps.

How to extract text from an existing docx file using python-docx

Without Installing python-docx

docx is basically is a zip file with several folders and files within it. In the link below you can find a simple function to extract the text from docx file, without the need to rely on python-docx and lxml the latter being sometimes hard to install:

http://etienned.github.io/posts/extract-text-from-word-docx-simply/

Programmatically read from STDIN or input file in Perl

You need to use <> operator:

while (<>) {
    print $_; # or simply "print;"
}

Which can be compacted to:

print while (<>);

Arbitrary file:

open F, "<file.txt" or die $!;
while (<F>) {
    print $_;
}
close F;

Could not install packages due to an EnvironmentError: [Errno 13]

I had similar trouble in a venv on a mounted NTFS partition on linux with all the right permissions. Making sure pip ran with --ignore-installed solved it, i.e.:

python -m pip install --upgrade --ignore-installed

Get paragraph text inside an element

Try this:

<li onclick="myfunction(this)">

function myfunction(li) {
    var TextInsideLi = li.getElementsByTagName('p')[0].innerHTML;
}

Live demo

Lotus Notes email as an attachment to another email

Tested vith Notes versions 6.5.x and 7.0.x From your Lotus Notes inbox

  1. Open the message
  2. Click View > Show > Page Source
  3. Copy all the data into a text file and save the file with .eml extension.
  4. Create a new message
  5. Attach the .eml file(s) and send the new message

Hop this helps. I have no client on my current machine but will test from home on 8.5.1

Use table name in MySQL SELECT "AS"

To declare a string literal as an output column, leave the Table off and just use Test. It doesn't need to be associated with a table among your joins, since it will be accessed only by its column alias. When using a metadata function like getColumnMeta(), the table name will be an empty string because it isn't associated with a table.

SELECT
  `field1`, 
  `field2`, 
  'Test' AS `field3` 
FROM `Test`;

Note: I'm using single quotes above. MySQL is usually configured to honor double quotes for strings, but single quotes are more widely portable among RDBMS.

If you must have a table alias name with the literal value, you need to wrap it in a subquery with the same name as the table you want to use:

SELECT
  field1,
  field2,
  field3
FROM 
  /* subquery wraps all fields to put the literal inside a table */
  (SELECT field1, field2, 'Test' AS field3 FROM Test) AS Test

Now field3 will come in the output as Test.field3.

How to rename a component in Angular CLI?

Here is a checklist I use to rename a component:

1.Rename the component class (VSCode Rename Symbool will update all the references)

<Old Name>Component => <New Name>Component

2.Rename @Component selector along with references (use VSCode's Replace in Files):

app-<old-name> => app-<new-name>

Result:
@Component({
  selector: 'app-<old-name>' => 'app-<new-name>',
  ...
})

<app-{old-name}></app-{old-name}> => <app-{new-name}></app-{new-name}>

3.Rename component folder (when renaming folder in VSCode, it will update references in module and other components)

src\app\<module>\<old-name> => src\app\<module>\<new-name>

4.Rename component files (renaming manually will be the fastest, but you can also use a terminal to rename all at once)

<old-name>.compoonent.* => <new-name>.compoonent.*

Bash:
find . -name "<old-name>.component.*" -exec rename 's/\/<old-name>\.component/\/<new-name>.component/' '{}' +

PowerShell: 
Get-Item <old-name>.component.* | % { Rename-Item $_ <new-name>.component.$($_.Extension) }

Cmd:
rename <old-name>.component.* <new-name>.component.*

5.Replace file references in @Component (use VSCode's Replace in Files):

<old-name>.component => <new-name>.component

Result:
@Component({
  ...
  templateUrl: './<old-name>.component.html' => './<old-name>.component.html',
  styleUrls: ['./<old-name>.component.scss'] => ['./<new-name>.component.scss']
})

That should be sufficient

Setting session variable using javascript

You could better use the localStorage of the web browser.

You can find a reference here

How to install lxml on Ubuntu

I installed lxml with pip in Vagrant, using Ubuntu 14.04 and had the same problem. Even though all requirements where installed, i got the same error again and again. Turned out, my VM had to little memory by default. With 1024 MB everything works fine.

Add this to your VagrantFile and lxml should properly compile / install:

config.vm.provider "virtualbox" do |vb|
  vb.memory = 1024
end

Thanks to sixhobbit for the hint (see: can't installing lxml on Ubuntu 12.04).

How do I convert a number to a letter in Java?

Another variant:

private String getCharForNumber(int i) {
    if (i > 25 || i < 0) {
        return null;
    }
    return new Character((char) (i + 65)).toString();
}

How to declare an array inside MS SQL Server Stored Procedure?

You could declare a table variable (Declaring a variable of type table):

declare @MonthsSale table(monthnr int)
insert into @MonthsSale (monthnr) values (1)
insert into @MonthsSale (monthnr) values (2)
....

You can add extra columns as you like:

declare @MonthsSale table(monthnr int, totalsales tinyint)

You can update the table variable like any other table:

update m
set m.TotalSales = sum(s.SalesValue)
from @MonthsSale m
left join Sales s on month(s.SalesDt) = m.MonthNr

How to send cookies in a post request with the Python Requests library?

The latest release of Requests will build CookieJars for you from simple dictionaries.

import requests

cookies = {'enwiki_session': '17ab96bd8ffbe8ca58a78657a918558'}

r = requests.post('http://wikipedia.org', cookies=cookies)

Enjoy :)

Can't install via pip because of egg_info error

virtualenv is a tool to create isolated Python environments.

you will need to add the following to fix command python setup.py egg_info failed with error code 1, so inside your requirements.txt add this:

virtualenv==12.0.7

CSS3 transform not working

Are you specifically trying to rotate the links only? Because doing it on the LI tags seems to work fine.

According to Snook transforms require the elements affected be block. He's also got some code there to make this work for IE using filters, if you care to add it on(though there appears to be some limitation on values).

Two Decimal places using c#

here is another approach

decimal decimalRounded = Decimal.Parse(Debitvalue.ToString("0.00"));

How to overplot a line on a scatter plot in python?

A one-line version of this excellent answer to plot the line of best fit is:

plt.plot(np.unique(x), np.poly1d(np.polyfit(x, y, 1))(np.unique(x)))

Using np.unique(x) instead of x handles the case where x isn't sorted or has duplicate values.

The call to poly1d is an alternative to writing out m*x + b like in this other excellent answer.

How are people unit testing with Entity Framework 6, should you bother?

This is a topic I'm very interested in. There are many purists who say that you shouldn't test technologies such as EF and NHibernate. They are right, they're already very stringently tested and as a previous answer stated it's often pointless to spend vast amounts of time testing what you don't own.

However, you do own the database underneath! This is where this approach in my opinion breaks down, you don't need to test that EF/NH are doing their jobs correctly. You need to test that your mappings/implementations are working with your database. In my opinion this is one of the most important parts of a system you can test.

Strictly speaking however we're moving out of the domain of unit testing and into integration testing but the principles remain the same.

The first thing you need to do is to be able to mock your DAL so your BLL can be tested independently of EF and SQL. These are your unit tests. Next you need to design your Integration Tests to prove your DAL, in my opinion these are every bit as important.

There are a couple of things to consider:

  1. Your database needs to be in a known state with each test. Most systems use either a backup or create scripts for this.
  2. Each test must be repeatable
  3. Each test must be atomic

There are two main approaches to setting up your database, the first is to run a UnitTest create DB script. This ensures that your unit test database will always be in the same state at the beginning of each test (you may either reset this or run each test in a transaction to ensure this).

Your other option is what I do, run specific setups for each individual test. I believe this is the best approach for two main reasons:

  • Your database is simpler, you don't need an entire schema for each test
  • Each test is safer, if you change one value in your create script it doesn't invalidate dozens of other tests.

Unfortunately your compromise here is speed. It takes time to run all these tests, to run all these setup/tear down scripts.

One final point, it can be very hard work to write such a large amount of SQL to test your ORM. This is where I take a very nasty approach (the purists here will disagree with me). I use my ORM to create my test! Rather than having a separate script for every DAL test in my system I have a test setup phase which creates the objects, attaches them to the context and saves them. I then run my test.

This is far from the ideal solution however in practice I find it's a LOT easier to manage (especially when you have several thousand tests), otherwise you're creating massive numbers of scripts. Practicality over purity.

I will no doubt look back at this answer in a few years (months/days) and disagree with myself as my approaches have changed - however this is my current approach.

To try and sum up everything I've said above this is my typical DB integration test:

[Test]
public void LoadUser()
{
  this.RunTest(session => // the NH/EF session to attach the objects to
  {
    var user = new UserAccount("Mr", "Joe", "Bloggs");
    session.Save(user);
    return user.UserID;
  }, id => // the ID of the entity we need to load
  {
     var user = LoadMyUser(id); // load the entity
     Assert.AreEqual("Mr", user.Title); // test your properties
     Assert.AreEqual("Joe", user.Firstname);
     Assert.AreEqual("Bloggs", user.Lastname);
  }
}

The key thing to notice here is that the sessions of the two loops are completely independent. In your implementation of RunTest you must ensure that the context is committed and destroyed and your data can only come from your database for the second part.

Edit 13/10/2014

I did say that I'd probably revise this model over the upcoming months. While I largely stand by the approach I advocated above I've updated my testing mechanism slightly. I now tend to create the entities in in the TestSetup and TestTearDown.

[SetUp]
public void Setup()
{
  this.SetupTest(session => // the NH/EF session to attach the objects to
  {
    var user = new UserAccount("Mr", "Joe", "Bloggs");
    session.Save(user);
    this.UserID =  user.UserID;
  });
}

[TearDown]
public void TearDown()
{
   this.TearDownDatabase();
}

Then test each property individually

[Test]
public void TestTitle()
{
     var user = LoadMyUser(this.UserID); // load the entity
     Assert.AreEqual("Mr", user.Title);
}

[Test]
public void TestFirstname()
{
     var user = LoadMyUser(this.UserID);
     Assert.AreEqual("Joe", user.Firstname);
}

[Test]
public void TestLastname()
{
     var user = LoadMyUser(this.UserID);
     Assert.AreEqual("Bloggs", user.Lastname);
}

There are several reasons for this approach:

  • There are no additional database calls (one setup, one teardown)
  • The tests are far more granular, each test verifies one property
  • Setup/TearDown logic is removed from the Test methods themselves

I feel this makes the test class simpler and the tests more granular (single asserts are good)

Edit 5/3/2015

Another revision on this approach. While class level setups are very helpful for tests such as loading properties they are less useful where the different setups are required. In this case setting up a new class for each case is overkill.

To help with this I now tend to have two base classes SetupPerTest and SingleSetup. These two classes expose the framework as required.

In the SingleSetup we have a very similar mechanism as described in my first edit. An example would be

public TestProperties : SingleSetup
{
  public int UserID {get;set;}

  public override DoSetup(ISession session)
  {
    var user = new User("Joe", "Bloggs");
    session.Save(user);
    this.UserID = user.UserID;
  }

  [Test]
  public void TestLastname()
  {
     var user = LoadMyUser(this.UserID); // load the entity
     Assert.AreEqual("Bloggs", user.Lastname);
  }

  [Test]
  public void TestFirstname()
  {
       var user = LoadMyUser(this.UserID);
       Assert.AreEqual("Joe", user.Firstname);
  }
}

However references which ensure that only the correct entites are loaded may use a SetupPerTest approach

public TestProperties : SetupPerTest
{
   [Test]
   public void EnsureCorrectReferenceIsLoaded()
   {
      int friendID = 0;
      this.RunTest(session =>
      {
         var user = CreateUserWithFriend();
         session.Save(user);
         friendID = user.Friends.Single().FriendID;
      } () =>
      {
         var user = GetUser();
         Assert.AreEqual(friendID, user.Friends.Single().FriendID);
      });
   }
   [Test]
   public void EnsureOnlyCorrectFriendsAreLoaded()
   {
      int userID = 0;
      this.RunTest(session =>
      {
         var user = CreateUserWithFriends(2);
         var user2 = CreateUserWithFriends(5);
         session.Save(user);
         session.Save(user2);
         userID = user.UserID;
      } () =>
      {
         var user = GetUser(userID);
         Assert.AreEqual(2, user.Friends.Count());
      });
   }
}

In summary both approaches work depending on what you are trying to test.

How to use `subprocess` command with pipes

After Python 3.5 you can also use:

    import subprocess

    f = open('test.txt', 'w')
    process = subprocess.run(['ls', '-la'], stdout=subprocess.PIPE, universal_newlines=True)
    f.write(process.stdout)
    f.close()

The execution of the command is blocking and the output will be in process.stdout.

Extract text from a string

If program name is always the first thing in (), and doesn't contain other )s than the one at end, then $yourstring -match "[(][^)]+[)]" does the matching, result will be in $Matches[0]

Why does scanf() need "%lf" for doubles, when printf() is okay with just "%f"?

Because otherwise scanf will think you are passing a pointer to a float which is a smaller size than a double, and it will return an incorrect value.

I'm trying to use python in powershell

The Directory is not set correctly so Please follow these steps.

  1. "MyComputer">Right Click>Properties>"System Properties">"Advanced" tab
  2. "Environment Variables">"Path">"Edit"
  3. In the "Variable value" box, Make sure you see following:

    ;c:\python27\;c:\python27\scripts

  4. Click "OK", Test this change by restarting your windows powershell. Type

    python

  5. Now python version 2 runs! yay!

What is the right way to check for a null string in Objective-C?

As others have pointed out, there are many kinds of "null" under Cocoa/Objective C. But one further thing to note is that [title isKindOfClass:[NSNull class]] is pointlessly complex since [NSNull null] is documented to be a singleton so you can just check for pointer equality. See Topics for Cocoa: Using Null.

So a good test might be:

if (title == (id)[NSNull null] || title.length == 0 ) title = @"Something";

Note how you can use the fact that even if title is nil, title.length will return 0/nil/false, ie 0 in this case, so you do not have to special case it. This is something that people who are new to Objective C have trouble getting used to, especially coming form other languages where messages/method calls to nil crash.

Renaming part of a filename

Something like this will do it. The for loop may need to be modified depending on which filenames you wish to capture.

for fspec1 in DET01-ABC-5_50-*.dat ; do
    fspec2=$(echo ${fspec1} | sed 's/-ABC-/-XYZ-/')
    mv ${fspec1} ${fspec2}
done

You should always test these scripts on copies of your data, by the way, and in totally different directories.

How to add jQuery to an HTML page?

Inside of your <head></head> tags add...

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script>
$(document).ready(function(){
    $('input[type=radio]').change(function() {

    $('input[type=radio]').each(function(index) {
        $(this).closest('tr').removeClass('selected');
    });

        $(this).closest('tr').addClass('selected');
    });
});
</script>

EDIT: The placement inside of <head></head> is not the only option...this could just as easily be placed RIGHT before the closing </body> tag. I generally try and place my JavaScript inside of head for placement reasons, but it can in some cases slow down page rendering so some will recommend the latter approach (before closing body).

bool to int conversion

int x = 4<5;

Completely portable. Standard conformant. bool to int conversion is implicit!

§4.7/4 from the C++ Standard says (Integral Conversion)

If the source type is bool, the value false is converted to zero and the value true is converted to one.


As for C, as far as I know there is no bool in C. (before 1999) So bool to int conversion is relevant in C++ only. In C, 4<5 evaluates to int value, in this case the value is 1, 4>5 would evaluate to 0.

EDIT: Jens in the comment said, C99 has _Bool type. bool is a macro defined in stdbool.h header file. true and false are also macro defined in stdbool.h.

§7.16 from C99 says,

The macro bool expands to _Bool.

[..] true which expands to the integer constant 1, false which expands to the integer constant 0,[..]

Understanding CUDA grid dimensions, block dimensions and threads organization (simple explanation)

Hardware

If a GPU device has, for example, 4 multiprocessing units, and they can run 768 threads each: then at a given moment no more than 4*768 threads will be really running in parallel (if you planned more threads, they will be waiting their turn).

Software

threads are organized in blocks. A block is executed by a multiprocessing unit. The threads of a block can be indentified (indexed) using 1Dimension(x), 2Dimensions (x,y) or 3Dim indexes (x,y,z) but in any case xyz <= 768 for our example (other restrictions apply to x,y,z, see the guide and your device capability).

Obviously, if you need more than those 4*768 threads you need more than 4 blocks. Blocks may be also indexed 1D, 2D or 3D. There is a queue of blocks waiting to enter the GPU (because, in our example, the GPU has 4 multiprocessors and only 4 blocks are being executed simultaneously).

Now a simple case: processing a 512x512 image

Suppose we want one thread to process one pixel (i,j).

We can use blocks of 64 threads each. Then we need 512*512/64 = 4096 blocks (so to have 512x512 threads = 4096*64)

It's common to organize (to make indexing the image easier) the threads in 2D blocks having blockDim = 8 x 8 (the 64 threads per block). I prefer to call it threadsPerBlock.

dim3 threadsPerBlock(8, 8);  // 64 threads

and 2D gridDim = 64 x 64 blocks (the 4096 blocks needed). I prefer to call it numBlocks.

dim3 numBlocks(imageWidth/threadsPerBlock.x,  /* for instance 512/8 = 64*/
              imageHeight/threadsPerBlock.y); 

The kernel is launched like this:

myKernel <<<numBlocks,threadsPerBlock>>>( /* params for the kernel function */ );       

Finally: there will be something like "a queue of 4096 blocks", where a block is waiting to be assigned one of the multiprocessors of the GPU to get its 64 threads executed.

In the kernel the pixel (i,j) to be processed by a thread is calculated this way:

uint i = (blockIdx.x * blockDim.x) + threadIdx.x;
uint j = (blockIdx.y * blockDim.y) + threadIdx.y;

Loop through columns and add string lengths as new columns

You need to use [[, the programmatic equivalent of $. Otherwise, for example, when i is col1, R will look for df$i instead of df$col1.

for(i in names(df)){
  df[[paste(i, 'length', sep="_")]] <- str_length(df[[i]])
}

Invalid CSRF Token 'null' was found on the request parameter '_csrf' or header 'X-CSRF-TOKEN'

In your controller add the following:

@RequestParam(value = "_csrf", required = false) String csrf

And on jsp page add

<form:form modelAttribute="someName" action="someURI?${_csrf.parameterName}=${_csrf.token}

LINQ Inner-Join vs Left-Join

Left joins in LINQ are possible with the DefaultIfEmpty() method. I don't have the exact syntax for your case though...

Actually I think if you just change pets to pets.DefaultIfEmpty() in the query it might work...

EDIT: I really shouldn't answer things when its late...

jQuery Refresh/Reload Page if Ajax Success after time

In your ajax success callback do this:

success: function(data){
   if(data.success == true){ // if true (1)
      setTimeout(function(){// wait for 5 secs(2)
           location.reload(); // then reload the page.(3)
      }, 5000); 
   }
}

As you want to reload the page after 5 seconds, then you need to have a timeout as suggested in the answer.

How to urlencode data for curl command?

Here is my version for busybox ash shell for an embedded system, I originally adopted Orwellophile's variant:

urlencode()
{
    local S="${1}"
    local encoded=""
    local ch
    local o
    for i in $(seq 0 $((${#S} - 1)) )
    do
        ch=${S:$i:1}
        case "${ch}" in
            [-_.~a-zA-Z0-9]) 
                o="${ch}"
                ;;
            *) 
                o=$(printf '%%%02x' "'$ch")                
                ;;
        esac
        encoded="${encoded}${o}"
    done
    echo ${encoded}
}

urldecode() 
{
    # urldecode <string>
    local url_encoded="${1//+/ }"
    printf '%b' "${url_encoded//%/\\x}"
}

Why is there no multiple inheritance in Java, but implementing multiple interfaces is allowed?

The answer of this question is lies in the internal working of java compiler(constructor chaining). If we see the internal working of java compiler:

public class Bank {
  public void printBankBalance(){
    System.out.println("10k");
  }
}
class SBI extends Bank{
 public void printBankBalance(){
    System.out.println("20k");
  }
}

After compiling this look like:

public class Bank {
  public Bank(){
   super();
  }
  public void printBankBalance(){
    System.out.println("10k");
  }
}
class SBI extends Bank {
 SBI(){
   super();
 }
 public void printBankBalance(){
    System.out.println("20k");
  }
}

when we extends class and create an object of it, one constructor chain will run till Object class.

Above code will run fine. but if we have another class called Car which extends Bank and one hybrid(multiple inheritance) class called SBICar:

class Car extends Bank {
  Car() {
    super();
  }
  public void run(){
    System.out.println("99Km/h");
  }
}
class SBICar extends Bank, Car {
  SBICar() {
    super(); //NOTE: compile time ambiguity.
  }
  public void run() {
    System.out.println("99Km/h");
  }
  public void printBankBalance(){
    System.out.println("20k");
  }
}

In this case(SBICar) will fail to create constructor chain(compile time ambiguity).

For interfaces this is allowed because we cannot create an object of it.

For new concept of default and static method kindly refer default in interface.

Hope this will solve your query. Thanks.

adb doesn't show nexus 5 device

Something nobody has mentioned yet:

Some cables do NOT support data. I was sitting here wondering why my Nexus 5 was refusing to show up on OSX. It turned out I was using a cable that didn't support data.

I swapped to a different cable which did support it, and suddenly I was able to use USB debugging.

CSS Resize/Zoom-In effect on Image while keeping Dimensions

You could achieve that simply by wrapping the image by a <div> and adding overflow: hidden to that element:

<div class="img-wrapper">
    <img src="..." />
</div>
.img-wrapper {
    display: inline-block; /* change the default display type to inline-block */
    overflow: hidden;      /* hide the overflow */
}

WORKING DEMO.


Also it's worth noting that <img> element (like the other inline elements) sits on its baseline by default. And there would be a 4~5px gap at the bottom of the image.

That vertical gap belongs to the reserved space of descenders like: g j p q y. You could fix the alignment issue by adding vertical-align property to the image with a value other than baseline.

Additionally for a better user experience, you could add transition to the images.

Thus we'll end up with the following:

.img-wrapper img {
    transition: all .2s ease;
    vertical-align: middle;
}

UPDATED DEMO.

What is the difference between __init__ and __call__?

__init__ is a special method in Python classes, it is the constructor method for a class. It is called whenever an object of the class is constructed or we can say it initialises a new object. Example:

    In [4]: class A:
   ...:     def __init__(self, a):
   ...:         print(a)
   ...:
   ...: a = A(10) # An argument is necessary
10

If we use A(), it will give an error TypeError: __init__() missing 1 required positional argument: 'a' as it requires 1 argument a because of __init__ .

........

__call__ when implemented in the Class helps us invoke the Class instance as a function call.

Example:

In [6]: class B:
   ...:     def __call__(self,b):
   ...:         print(b)
   ...:
   ...: b = B() # Note we didn't pass any arguments here
   ...: b(20)   # Argument passed when the object is called
   ...:
20

Here if we use B(), it runs just fine because it doesn't have an __init__ function here.

Add x and y labels to a pandas plot

In Pandas version 1.10 and above you can use parameters xlabel and ylabel in the method plot:

df.plot(xlabel='X Label', ylabel='Y Label', title='Plot Title')

enter image description here

Insert/Update Many to Many Entity Framework . How do I do it?

I use the following way to handle the many-to-many relationship where only foreign keys are involved.

So for inserting:

public void InsertStudentClass (long studentId, long classId)
{
    using (var context = new DatabaseContext())
    {
        Student student = new Student { StudentID = studentId };
        context.Students.Add(student);
        context.Students.Attach(student);

        Class class = new Class { ClassID = classId };
        context.Classes.Add(class);
        context.Classes.Attach(class);

        student.Classes = new List<Class>();
        student.Classes.Add(class);

        context.SaveChanges();
    }
}

For deleting,

public void DeleteStudentClass(long studentId, long classId)
{
    Student student = context.Students.Include(x => x.Classes).Single(x => x.StudentID == studentId);

    using (var context = new DatabaseContext())
    {
        context.Students.Attach(student);
        Class classToDelete = student.Classes.Find(x => x.ClassID == classId);
        if (classToDelete != null)
        {
            student.Classes.Remove(classToDelete);
            context.SaveChanges();
        }
    }
}

how do I get a new line, after using float:left?

Another approach that's a little more semantic is to have a UL defined as your total 6 image width, each LI defined as float left and width defined - so that when LI #7 hits, it runs into the boundry of the UL, and is pushed down to the new row. You'll still have an open float that you'll want to clear after the /UL - but that can be done on the next element of the page, or as a clear div. Here's sort of the idea, you may have to mess with actual values, but this should give you the idea. The code is a little cleaner.

 <style type="text/css"> 
ul#imageSet { width: 600px; margin: 0; padding:0; }
ul#imageSet li { float: left; width: 100px;  height: 188px; margin: 0; padding:0; position: relative; list-style-type: none; }
.cornerimage { position: absolute; bottom: 0; right: 0; } 
h3.nextelement { clear: both; }
</style>


<ul id="imageSet">
    <li>
        <img border="0" height="188" src="http://farm3.static.flickr.com/2459/3534790964_5d8bed17c0.jpg" width="100" />
        <img class="cornerimage" height="140" src="http://farm4.static.flickr.com/3310/3514664446_08e9745681.jpg" width="50" />
    </li>
     <li>
        <img border="0" height="188" src="http://farm3.static.flickr.com/2459/3534790964_5d8bed17c0.jpg" width="100" />
        <img class="cornerimage" height="140" src="http://farm4.static.flickr.com/3310/3514664446_08e9745681.jpg" width="50" />
    </li>
    <li>
        <img border="0" height="188" src="http://farm3.static.flickr.com/2459/3534790964_5d8bed17c0.jpg" width="100" />
        <img class="cornerimage" height="140" src="http://farm4.static.flickr.com/3310/3514664446_08e9745681.jpg" width="50" />
    </li>
    <li>
        <img border="0" height="188" src="http://farm3.static.flickr.com/2459/3534790964_5d8bed17c0.jpg" width="100" />
        <img class="cornerimage" height="140" src="http://farm4.static.flickr.com/3310/3514664446_08e9745681.jpg" width="50" />
    </li>
    <li>
        <img border="0" height="188" src="http://farm3.static.flickr.com/2459/3534790964_5d8bed17c0.jpg" width="100" />
        <img class="cornerimage" height="140" src="http://farm4.static.flickr.com/3310/3514664446_08e9745681.jpg" width="50" />
    </li>
    <li>
        <img border="0" height="188" src="http://farm3.static.flickr.com/2459/3534790964_5d8bed17c0.jpg" width="100" />
        <img class="cornerimage" height="140" src="http://farm4.static.flickr.com/3310/3514664446_08e9745681.jpg" width="50" />
    </li>
    <li>
        <img border="0" height="188" src="http://farm3.static.flickr.com/2459/3534790964_5d8bed17c0.jpg" width="100" />
        <img class="cornerimage" height="140" src="http://farm4.static.flickr.com/3310/3514664446_08e9745681.jpg" width="50" />
    </li>
    <li>
        <img border="0" height="188" src="http://farm3.static.flickr.com/2459/3534790964_5d8bed17c0.jpg" width="100" />
        <img class="cornerimage" height="140" src="http://farm4.static.flickr.com/3310/3514664446_08e9745681.jpg" width="50" />
    </li>
</ul>


<h3 class="nextelement">Next Element in Doc</h3>

Suppress warning messages using mysql from within Terminal, but password written in bash script

it's very simple. this is work for me.

export MYSQL_PWD=password; mysql --user=username -e "statement"

MYSQL_PWD is one of environment variables from mysql. it's default password when connecting to mysqld.

Convert Word doc, docx and Excel xls, xlsx to PDF with PHP

I found a solution to my issue and after a request, will post it here to help others. Apologies if I missed any details, it's been a while since I worked on this solution.

The first thing that is required is to install Openoffice.org on the server. I requested my hosting provider to install the open office RPM on my VPS. This can be done through WHM directly.

Now that the server has the capability to handle MS Office files you are able to convert the files by executing command line instructions via PHP. To handle this, I found PyODConverter: https://github.com/mirkonasato/pyodconverter

I created a directory on the server and placed the PyODConverter python file within it. I also created a plain text file above the web root (I named it "adocpdf"), with the following command line instructions in it:

directory=$1
filename=$2
extension=$3
SERVICE='soffice'
if [ "`ps ax|grep -v grep|grep -c $SERVICE`" -lt 1 ]; then 
unset DISPLAY
/usr/bin/soffice -headless -accept="socket,host=127.0.0.1,port=8100;urp;" -nofirststartwizard & 
sleep 5s
fi
python /home/website/python/DocumentConverter.py /home/website/$directory$filename$extension /home/website/$directory$filename.pdf

This checks that the openoffice.org libraries are running and then calls the PyODConverter script to process the file and output it as a PDF. The 3 variables on the first three lines are provided when the script is executed from with a PHP file. The delay ("sleep 5s") is used to ensure that openoffice.org has enough to time to initiate if required. I have used this for months now and the 5s gap seems to give enough breathing room.

The script will create a PDF version of the document in the same directory as the original.

Finally, initiating the conversion of a Word / Excel file from within PHP (I have it within a function that checks if the file we are dealing with is a word / excel document)...

//use openoffice.org
$output = array();
$return_var = 0;
exec("/opt/adocpdf {$directory} {$filename} {$extension}", $output, $return_var);

This PHP function is called once the Word / Excel file has been uploaded to the server. The 3 variables in the exec() call relate directly to the 3 at the start of the plain text script above. Note that the $directory variable requires no leading forward slash if the file for conversion is within the web root.

OK, that's it! Hopefully this will be useful to someone and save them the difficulties and learning curve I faced.

Change the selected value of a drop-down list with jQuery

Just an FYI, you don't need to use CSS classes to accomplish this.

You can write the following line of code to get the correct control name on the client:

$("#<%= statusDDL.ClientID %>").val("2");

ASP.NET will render the control ID correctly inside the jQuery.

Can't bind to 'ngIf' since it isn't a known property of 'div'

Instead of [ngIf] you should use *ngIf like this:

<div *ngIf="isAuth" id="sidebar">

Optional Parameters in Web Api Attribute Routing

Converting my comment into an answer to complement @Kiran Chala's answer as it seems helpful for the audiences-

When we mark a parameter as optional in the action uri using ? character then we must provide default values to the parameters in the method signature as shown below:

MyMethod(string name = "someDefaultValue", int? Id = null)

Select info from table where row has max date

SELECT distinct
  group, 
  max_date = MAX(date) OVER (PARTITION BY group), checks
FROM table

Should work.

Unable to run Java code with Intellij IDEA

Last resort option when nothing else seems to work: close and reopen IntelliJ.

My issue was with reverting a Git commit, which happened to change the Java SDK configured for the Project to a no longer installed version of the JDK. But fixing that back still didn't allow me to run the program. Restarting IntelliJ fixed this

String replacement in batch file

I was able to use Joey's Answer to create a function:

Use it as:

@echo off
SETLOCAL ENABLEDELAYEDEXPANSION

SET "MYTEXT=jump over the chair"
echo !MYTEXT!
call:ReplaceText "!MYTEXT!" chair table RESULT
echo !RESULT!

GOTO:EOF

And these Functions to the bottom of your Batch File.

:FUNCTIONS
@REM FUNCTIONS AREA
GOTO:EOF
EXIT /B

:ReplaceText
::Replace Text In String
::USE:
:: CALL:ReplaceText "!OrginalText!" OldWordToReplace NewWordToUse  Result
::Example
::SET "MYTEXT=jump over the chair"
::  echo !MYTEXT!
::  call:ReplaceText "!MYTEXT!" chair table RESULT
::  echo !RESULT!
::
:: Remember to use the "! on the input text, but NOT on the Output text.
:: The Following is Wrong: "!MYTEXT!" !chair! !table! !RESULT!
:: ^^Because it has a ! around the chair table and RESULT
:: Remember to add quotes "" around the MYTEXT Variable when calling.
:: If you don't add quotes, it won't treat it as a single string
::
set "OrginalText=%~1"
set "OldWord=%~2"
set "NewWord=%~3"
call set OrginalText=%%OrginalText:!OldWord!=!NewWord!%%
SET %4=!OrginalText!
GOTO:EOF

And remember you MUST add "SETLOCAL ENABLEDELAYEDEXPANSION" to the top of your batch file or else none of this will work properly.

SETLOCAL ENABLEDELAYEDEXPANSION
@REM # Remember to add this to the top of your batch file.

Retrieve the commit log for a specific line in a file?

Simplifying @matt's answer -

git blame -L14,15 -- <file_path>

Here you will get a blame for a lines 14 to 15.

Since -L option expects Range as a param we can't get a Blame for a single line using the -L option`.

Reference

This API project is not authorized to use this API. Please ensure that this API is activated in the APIs Console

For Angular developer:

When I need to use agm-direction package, the console shows that "you have to have a credential key first, please go to here", but I already have one so I can view the google map.

Aftet a while, I found the only thing you need to do is go to Direction API and enable it, then wait for about 10s, you are good to go. The whole thing sums up that the console log didn't tell what API is needed exactly.

C++ Vector of pointers

By dynamically allocating a Movie object with new Movie(), you get a pointer to the new object. You do not need a second vector for the movies, just store the pointers and you can access them. Like Brian wrote, the vector would be defined as

std::vector<Movie *> movies

But be aware that the vector will not delete your objects afterwards, which will result in a memory leak. It probably doesn't matter for your homework, but normally you should delete all pointers when you don't need them anymore.

How to go to a specific element on page?

If the element is currently not visible on the page, you can use the native scrollIntoView() method.

$('#div_' + element_id)[0].scrollIntoView( true );

Where true means align to the top of the page, and false is align to bottom.

Otherwise, there's a scrollTo() plugin for jQuery you can use.

Or maybe just get the top position()(docs) of the element, and set the scrollTop()(docs) to that position:

var top = $('#div_' + element_id).position().top;
$(window).scrollTop( top );

jQuery how to bind onclick event to dynamically added HTML element

It is possible and sometimes necessary to create the click event along with the element. This is for example when selector based binding is not an option. The key part is to avoid the problem that Tobias was talking about by using .replaceWith() on a single element. Note that this is just a proof of concept.

<script>
    // This simulates the object to handle
    var staticObj = [
        { ID: '1', Name: 'Foo' },
        { ID: '2', Name: 'Foo' },
        { ID: '3', Name: 'Foo' }
    ];
    staticObj[1].children = [
        { ID: 'a', Name: 'Bar' },
        { ID: 'b', Name: 'Bar' },
        { ID: 'c', Name: 'Bar' }
    ];
    staticObj[1].children[1].children = [
        { ID: 'x', Name: 'Baz' },
        { ID: 'y', Name: 'Baz' }
    ];

    // This is the object-to-html-element function handler with recursion
    var handleItem = function( item ) {
        var ul, li = $("<li>" + item.ID + " " + item.Name + "</li>");

        if(typeof item.children !== 'undefined') {
            ul = $("<ul />");
            for (var i = 0; i < item.children.length; i++) {
                ul.append(handleItem(item.children[i]));
            }
            li.append(ul);
        }

        // This click handler actually does work
        li.click(function(e) {
            alert(item.Name);
            e.stopPropagation();
        });
        return li;
    };

    // Wait for the dom instead of an ajax call or whatever
    $(function() {
        var ul = $("<ul />");

        for (var i = 0; i < staticObj.length; i++) {
            ul.append(handleItem(staticObj[i]));
        }

        // Here; this works.
        $('#something').replaceWith(ul);
    });
</script>
<div id="something">Magical ponies ?</div>

Custom pagination view in Laravel 5

Maybe it is too late, but I would like to share another custom pagination template I made that creates a first/next and last/previous links. It also hides the links when the user is in the first/last page already.

(Optional) You can also determine the interval of links (the number of links before and after the current page)

Usage example:

 @include('pagination', ['paginator' => $users])

or

@include('pagination', ['paginator' => $users, 'interval' => 5])

Here is the gist: https://gist.github.com/carloscarucce/33f6082d009c20f77499252b89c35dea

And the code:

@if (isset($paginator) && $paginator->lastPage() > 1)

    <ul class="pagination">

        <?php
        $interval = isset($interval) ? abs(intval($interval)) : 3 ;
        $from = $paginator->currentPage() - $interval;
        if($from < 1){
            $from = 1;
        }

        $to = $paginator->currentPage() + $interval;
        if($to > $paginator->lastPage()){
            $to = $paginator->lastPage();
        }
        ?>

        <!-- first/previous -->
        @if($paginator->currentPage() > 1)
            <li>
                <a href="{{ $paginator->url(1) }}" aria-label="First">
                    <span aria-hidden="true">&laquo;</span>
                </a>
            </li>

            <li>
                <a href="{{ $paginator->url($paginator->currentPage() - 1) }}" aria-label="Previous">
                    <span aria-hidden="true">&lsaquo;</span>
                </a>
            </li>
        @endif

        <!-- links -->
        @for($i = $from; $i <= $to; $i++)
            <?php 
            $isCurrentPage = $paginator->currentPage() == $i;
            ?>
            <li class="{{ $isCurrentPage ? 'active' : '' }}">
                <a href="{{ !$isCurrentPage ? $paginator->url($i) : '#' }}">
                    {{ $i }}
                </a>
            </li>
        @endfor

        <!-- next/last -->
        @if($paginator->currentPage() < $paginator->lastPage())
            <li>
                <a href="{{ $paginator->url($paginator->currentPage() + 1) }}" aria-label="Next">
                    <span aria-hidden="true">&rsaquo;</span>
                </a>
            </li>

            <li>
                <a href="{{ $paginator->url($paginator->lastpage()) }}" aria-label="Last">
                    <span aria-hidden="true">&raquo;</span>
                </a>
            </li>
        @endif

    </ul>

@endif

HTML Script tag: type or language (or omit both)?

HTML4/XHTML1 requires

<script type="...">...</script>

HTML5 faces the fact that there is only one scripting language on the web, and allows

<script>...</script>

The latter works in any browser that supports scripting (NN2+).