I&#39;ve just encountered this exception running a Xamarin app on the simulator. It started occurring after I toggled the software keyboard off while debugging the app. Given the exception mentioning the keyboard I think that&#39;s what caused it.

Uninstalling the app from the emulator, cleaning and rebuilding fixed the issue for me.

Unsure if this bug is on Apple&#39;s side or Xamarin&#39;s.


The only references I could find related to Xamarin was close, but the inverse of this - [the app crashing on the simulator, but working on an actual device][1]. The resolution in that forum post doesn&#39;t describe what the problem might be, but does suggest that cleaning the project and rebuilding may resolve it.


The specific message `HW kbd Failed to set (null) as keyboard focus ios` is related to the app crashing, but there&#39;s no additional information in [the pastebin][2] to really help pin down why it&#39;s crashing. 

You might also consider adding logging statements in your code to see if you can isolate the issue.


  [1]: https://forums.xamarin.com/discussion/52647/app-crashes-immediately-on-start-on-ipad-runs-fine-in-simulator
  [2]: http://pastebin.com/0ny9MPn9

I have a dictionary of dictionaries of the form:

    {&#39;user&#39;:{movie:rating} }

For example, 

    {Jill&#39;: {&#39;Avenger: Age of Ultron&#39;: 7.0,
                                &#39;Django Unchained&#39;: 6.5,
                                &#39;Gone Girl&#39;: 9.0,
                                &#39;Kill the Messenger&#39;: 8.0}
    &#39;Toby&#39;: {&#39;Avenger: Age of Ultron&#39;: 8.5,
                                    &#39;Django Unchained&#39;: 9.0,
                                    &#39;Zoolander&#39;: 2.0}}


I want to convert this dict of dicts into a pandas dataframe with column 1 the user name and the other columns the movie ratings i.e. 

    user  Gone_Girl  Horrible_Bosses_2  Django_Unchained  Zoolander etc. \

However, some users did not rate the movies and so these movies are not included in the values() for that user key(). It would be nice in these cases to just fill the entry with NaN. 

As of now, I iterate over the keys, fill a list, and then use this list to create a dataframe:

    data=[] 
    for i,key in enumerate(movie_user_preferences.keys() ):
        try:            
            data.append((key
                        ,movie_user_preferences[key][&#39;Gone Girl&#39;]
                        ,movie_user_preferences[key][&#39;Horrible Bosses 2&#39;]
                        ,movie_user_preferences[key][&#39;Django Unchained&#39;]
                        ,movie_user_preferences[key][&#39;Zoolander&#39;]
                        ,movie_user_preferences[key][&#39;Avenger: Age of Ultron&#39;]
                        ,movie_user_preferences[key][&#39;Kill the Messenger&#39;]))
        # if no entry, skip
        except:
            pass 
    df=pd.DataFrame(data=data,columns=[&#39;user&#39;,&#39;Gone_Girl&#39;,&#39;Horrible_Bosses_2&#39;,&#39;Django_Unchained&#39;,&#39;Zoolander&#39;,&#39;Avenger_Age_of_Ultron&#39;,&#39;Kill_the_Messenger&#39;])

But this only gives me a dataframe of users who rated all the movies in the set. 

My goal is to append to the data list by iterating over the movie labels (rather than the brute force approach shown above) and, secondly, create a dataframe that includes all users and that places null values in the elements that do not have movie ratings. 
 


create pandas dataframe from dictionary of dictionaries

We are implementing a REST API, which will kick off multiple long running backend tasks. I have been reading the RESTful Web Services Cookbook and the recommendation is to return HTTP 202 / Accepted with a Content-Location header pointing to the task being processed. (e.g. http://www.example.org/orders/tasks/1234), and have the client poll this URI for an update on the long running task. 

The idea is to have the REST API immediately post a message to a queue, with a background worker role picking up the message from the queue and spinning up multiple backend tasks, also using queues. The problem I see with this approach is how to assign a unique ID to the task and subsequently let the client request a status of the task by issuing a GET to the Content-Location URI. 

If the REST API immediately posts to a queue, then it could generate a GUID and attach that as an attribute on the message being added to the queue, but fetching the status of the request becomes awkward. 

Another option would be to have the REST API immediately add an entry to the database (let&#39;s say an order, with a new order id), with an initial status and then subsequently put a message on the queue to kick off the back ground tasks, which would then subsequently update that database record. The API would return this new order ID in the URI of the Content-Location header, for the client to use when checking the status of the task. 

Somehow adding the database entry first, then adding the message to the queue seems backwards, but only adding the request to the queue makes it hard to track progress. 

What would be the recommended approach? 

Thanks a lot for your insights. 



Long running REST API with queues

In my iOS app crash log I found this statement:

    HW kbd Failed to set (null) as keyboard focus ios

Does anyone know what this is and how to resolve it?

HW kbd Failed to set (null) as keyboard focus ios

In my iOS app crash log I found this statement:
<pre><code class="hljs language-kotlin">HW kbd Failed to set (null) as keyboard focus ios
</code></pre>
Does anyone know what this is and how to resolve it?

I&#39;ve upgraded to El Capitan and since then I can&#39;t update my pods.

    $ pod update
    -bash: pod: command not found

So I&#39;ve tried to reinstall CocoaPods and got this:

    $ sudo gem install cocoapods
    ERROR:  While executing gem ... (Errno::EPERM)
        Operation not permitted - /usr/bin/xcodeproj

I am the administrator on this computer. Why is this happening? 

Cocoa Pods not updating pods on El Capitan

I know this topic is quite popular, but I&#39;m a little iniciate problem in a programming language, the fact is that I still do not understand where I put the code. Well, I&#39;ll tell the whole case:

[![enter image description here][1]][1]

I&#39;m trying to make a modal Swift in a little different from normal: By clicking on a button, the ViewController is displayed (following modal type) on the screen, but with transparent background. Only the blue View with label will be displayed. When this ViewController is presented, it is with transparent background, but as soon as it completes the transition, it will stay with the black background. Already deactivated the opaque option, and tested some options, but nothing this troubleshooting.

Some can help me?

The video is a test in the simulator on the case (https://www.youtube.com/watch?v=wT8Uwmq9yqY).


  [1]: http://i.stack.imgur.com/DGFlN.png

I&#39;m starting with swift, and I&#39;m still pretty lost with how to program in Xcode, I read an answer to a question that has the following code to solve this:

    self.presentingViewController.providesPresentationContextTransitionStyle = YES;
    self.presentingViewController.definesPresentationContext = YES;
    modal.modalPresentationStyle = UIModalPresentationOverCurrentContext;

Where do I put this code?

Swift Modal View Controller with transparent background

I have already searched and almost implemented max solution but it&#39;s not installing any app even though if I am creating just sample single view app.

&gt;**App installation failed**  
&gt;A valid provisioning profile for this executable was not found.

[![enter image description here][1]][1]

  [1]: http://i.stack.imgur.com/TU8NJ.png


Xcode 7: App installation failed: A valid provisioning profile for this executable was not found

I&#39;m setting up payments using the Stripe API to allow a user to log into their Stripe account on an iPad and accept payments from anyone. To do this, I&#39;m using Stripe Connect to log them in and save their account id, then I&#39;m using the `STPPaymentCardTextField` to obtain credit card details, then using the Stripe iOS SDK I&#39;m submitting a card (with the test card info - 4242...) and getting back a token via `createTokenWithCard`. This successfully returns a token. At this point I need to submit that token along with the destination account id (provided to the app after the user logged in) and other info (currency, amount, etc) to my own server to submit the payment to Stripe. I have verified that information is being submitted and forwarded onto Stripe, but Stripe is returning an error:

    { type: &#39;invalid_request_error&#39;,
    app[web.1]:      message: &#39;No such token: tok_13vxes2eZkKYli2C9bHY1YfX&#39;,
    app[web.1]:      param: &#39;source&#39;,
    app[web.1]:      statusCode: 400,
    app[web.1]:      requestId: &#39;req_7AIT8cEasnzEaq&#39; },
    app[web.1]:   requestId: &#39;req_7AIT8cEasnzEaq&#39;,
    app[web.1]:   statusCode: 400 }

If we submit the credit card info directly, avoiding the token altogether, the payment succeeds. Something is wrong with this token, and we are not sure why it is failing. What could be going wrong here?

    [[STPAPIClient sharedClient] createTokenWithCard:card completion:^(STPToken *token, NSError *error) {
        //submit tokenId and other info to &#39;charge&#39; endpoint below
    }

NodeJS:

    app.post(&#39;/charge&#39;, (req, res, next) =&gt; {
      stripe.charges.create({
        amount: req.body.amount,
        currency: req.body.currency,
        source: req.body.token,
        description: req.body.description,
        destination: req.body.destination
      }, (err, charge) =&gt; {
        if (err) return next(err)
        res.json(charge)
      })
    })

&#39;No such token&#39; error upon submitting payment request to Stripe

while getting cookies from `UIWebView` seems straightforward by using `NSHTTPCookieStorage.sharedHTTPCookieStorage()`, it seems `WKWebView` stores the cookies somewhere else.

I did some research, and I was able to get some cookies from the grabbing it from `NSHTTPURLResponse` object. this, however, does not contain all the cookies used by `WKWebView`:

    func webView(webView: WKWebView, decidePolicyForNavigationResponse navigationResponse: WKNavigationResponse, decisionHandler: (WKNavigationResponsePolicy) -&gt; Void) {
    
      if let httpResponse = navigationResponse.response as? NSHTTPURLResponse {
        if let headers = httpResponse.allHeaderFields as? [String: String], url = httpResponse.URL {
          let cookies = NSHTTPCookie.cookiesWithResponseHeaderFields(headers, forURL: url)
          
          for cookie in cookies {
            logDebug(cookie.description)
            
            logDebug(&quot;found cookie &quot; + cookie.name + &quot; &quot; + cookie.value)
          }
        }
      }
    }


Strangely, there&#39;s also a class `WKWebsiteDataStore` in ios 9 that responsible for managing cookies in `WKWebView`, however, the class does not contain a public method to retrieve the cookies data:

    let storage = WKWebsiteDataStore.defaultDataStore()
      
    storage.fetchDataRecordsOfTypes([WKWebsiteDataTypeCookies], completionHandler: { (records) -&gt; Void in
      for record in records {
        logDebug(&quot;cookie record is &quot; + record.debugDescription)
          
        for dataType in record.dataTypes {
          logDebug(&quot;data type is &quot; + dataType.debugDescription)
            
          // get cookie data??
        }
      }
    })


Is there a workaround for getting the cookie data?

Content Type	Original Author	Original Content on Stackoverflow
Question	Waris Shams	View Question on Stackoverflow
Solution 1 - Ios	James Mundy	View Answer on Stackoverflow
Solution 2 - Ios	heckj	View Answer on Stackoverflow

HW kbd Failed to set (null) as keyboard focus ios

Ios Problem Overview

Ios Solutions

Solution 1 - Ios

Solution 2 - Ios

Long running REST API with queues

create pandas dataframe from dictionary of dictionaries

Attributions