I realize that you asked this back in March, but according to [this](http://support.getsocialize.com/socialize/topics/authenticate_facebook_failed_social_sdk_2_7_1) it can happen when a login (like a connection to FB) has timed out.

If you do a stacktrace and see &lt;redacted&gt;, then [this](https://stackoverflow.com/questions/12809174/how-to-stop-symbolicate-adding-redacted-pieces-to-ios-crash-log/12854350#12854350) should help.

And [here](http://developer.limneos.net/?framework=GeoServices.framework&amp;header=GEOResourceManifestServerRemoteProxy.h) is the code for that interface, if that&#39;s helpful.

In pandas, how can I convert a column of a DataFrame into dtype object?
Or better yet, into a factor? (For those who speak R, in Python, how do I `as.factor()`?)

Also, what&#39;s the difference between `pandas.Factor` and `pandas.Categorical`?


Pandas - make a column dtype object or Factor

I&#39;m creating a simple programming language for a school project. I&#39;m using ANTLR 4 to generate a lexer and a parser from my grammar. Until now, I have been using ANTLRs listener pattern to apply the actual functionality of the programming language.

Now I would like to implement if/else statements but I&#39;m not sure that these can actually be implemented when using the listener pattern as ANTLR decides in which order to traverse the parse tree when using listeners and I imagine that the implementation of if/else statements will require jumping around the parse tree depending on which condition in the statement is satisfied.

Can anyone tell me if it will be possible to implement if/else statements using ANTLR or if I will have to implement the visitor pattern myself? Also, can anyone give an extremely simple example of the implementation the statements?

If/else statements in ANTLR using listeners

I am testing my app that uses `iCloud`. Sometimes, when I fire up the app I get the following warning in the console:

    GEOResourceManifestServerRemoteProxy: Lost connection to geod

Once I get this warning I don&#39;t seem to get any data from `iCloud`. I have tried searching this issue, but have found very little information on it. 

Any suggestions on how one should try to detect this issue and try to handle it?

iCloud and GEOResourceManifestServerRemoteProxy: Lost connection to geod warning

I am testing my app that uses <code>iCloud</code>. Sometimes, when I fire up the app I get the following warning in the console:
<pre><code class="hljs language-vbnet">GEOResourceManifestServerRemoteProxy: Lost connection to geod
</code></pre>
Once I get this warning I don't seem to get any data from <code>iCloud</code>. I have tried searching this issue, but have found very little information on it.
Any suggestions on how one should try to detect this issue and try to handle it?

I have a `UITableViewCell` which is linked to an object and I need to tell if the cell is visible. From the research I&#39;ve done, this means I need to somehow access the `UITableView` that contains it (from there, there are several ways to check if it&#39;s visible). So I&#39;m wondering if `UITableViewCell` has a pointer to the `UITableView`, or if there was any other way to get a pointer from the cell?

How to get UITableView from UITableViewCell?

How do I, from a cell, get its `indexPath` in a `UITableView`?

I&#39;ve searched around stack overflow and google, but all the information is on the other way around. Is there some way to access the `superView`/`UITableView` and then search for the cell?

More information about the context: there are two classes that I have, one is called `Cue` and one is called `CueTableCell` (which is a subclass of `UITableViewCell`) `CueTableCell` is the visual representation of `Cue` (both classes have pointers to each other). `Cue` objects are in a linked list and when the user performs a certain command, the visual representation (the `CueTableCell`) of the next `Cue` needs to be selected. So the `Cue` class calls the `select` method on the next `Cue` in the list, which retrieves the `UITableView` from the `cell` and calls its `selectRowAtIndexPath:animated:scrollPosition:`, for which it needs the `indexPath` of the `UITableViewCell`.

How to get UITableViewCell indexPath from the Cell?

While improving the security of an iOS application that we are developing, we found the need to PIN (the entire or parts of) the SSL certificate of server to prevent man-in-the-middle attacks. 

Even though there are various approaches to do this, when you searching for thisI only found  examples for pinning the entire certificate. Such practice poses a problem: As soon as the certificate is updated, your application will not be able to connect anymore. 
If you choose to pin the public key instead of the entire certificate you will find yourself (I believe) in an equally secure situation, while being more resilient to certificate updates in the server. 

But how do you do this?

How to pin the Public key of a certificate on iOS

I have a UITableView that in some cases it is legal to be empty. So instead of showing the
background image of the app, I would prefer to print a friendly message in the screen, such as:

&gt; This list is now empty

What is the simplest way to do it? 

Handling an empty UITableView. Print a friendly message

I have a View Controller in which my value is 0 (label) and when I open that View Controller from another `ViewController` I have set `viewDidAppear` to set value 20 on label.  It works fine but when I close my app and than again I open my app but the value doesn&#39;t change because `viewDidLoad`, `viewDidAppear` and `viewWillAppear` nothing get called.  How can I call when I open my app.  Do I have to do anything from `applicationDidBecomeActive`? 


ViewDidAppear is not called when opening app from background

I&#39;m using Xcode 4.6.1 to code on Objective-C. I want to know how can I keep the navigation bar shown when I create a modal segue between 2 View controllers, because I&#39;m doing the segue in the storyboard and when I run the application the navigation bar of the second view controller disappears, and I have a done button on that bar but I can&#39;t see it.

Modal segue, navigation bar disappears

I know I&#39;m using the latest version (v3.2.1). But I want find it in header or programmatically.

In iOS I can&#39;t find version number in FacebookSDK.framework headers.


Find Facebook SDK Version on iOS

I have to make a Lagrange polynomial in Python for a project I&#39;m doing. I&#39;m doing a barycentric style one to avoid using an explicit for-loop as opposed to a Newton&#39;s divided difference style one. The problem I have is that I need to catch a division by zero, but Python (or maybe numpy) just makes it a warning instead of a normal exception.

So, what I need to know how to do is to catch this warning as if it were an exception. The related questions to this I found on this site were answered not in the way I needed. Here&#39;s my code:

	import numpy as np
	import matplotlib.pyplot as plt
	import warnings

	class Lagrange:
		def __init__(self, xPts, yPts):
			self.xPts = np.array(xPts)
			self.yPts = np.array(yPts)
			self.degree = len(xPts)-1 
			self.weights = np.array([np.product([x_j - x_i for x_j in xPts if x_j != x_i]) for x_i in xPts])
		
		def __call__(self, x):
			warnings.filterwarnings(&quot;error&quot;)
			try:
				bigNumerator = np.product(x - self.xPts)
				numerators = np.array([bigNumerator/(x - x_j) for x_j in self.xPts])
				return sum(numerators/self.weights*self.yPts) 
			except Exception, e: # Catch division by 0. Only possible in &#39;numerators&#39; array
				return yPts[np.where(xPts == x)[0][0]]
			
	L = Lagrange([-1,0,1],[1,0,1]) # Creates quadratic poly L(x) = x^2

	L(1) # This should catch an error, then return 1. 

When this code is executed, the output I get is:

    Warning: divide by zero encountered in int_scalars

That&#39;s the warning I want to catch. It should occur inside the list comprehension.


How do I catch a numpy warning like it&#39;s an exception (not just for testing)?

I have a long R script that throws some warnings, which I can ignore.
I could use 

    suppressWarnings(expr)

for single statements. But how can I suppress warnings in R globally? Is there an option for this?

How to suppress warnings globally in an R Script

I don&#39;t understand why I got this warning message.

    &gt; fixed &lt;- data.frame(&quot;Type&quot; = character(3), &quot;Amount&quot; = numeric(3))
    &gt; fixed[1, ] &lt;- c(&quot;lunch&quot;, 100)
    Warning message:
    In `[&lt;-.factor`(`*tmp*`, iseq, value = &quot;lunch&quot;) :
      invalid factor level, NA generated
    &gt; fixed
      Type Amount
    1 &lt;NA&gt;    100
    2           0
    3           0

Warning message: In `...` : invalid factor level, NA generated

I&#39;m still kinda new with Python, using Pandas, and I&#39;ve got some issues debugging my Python script.

I&#39;ve got the following warning message :

    [...]\pandas\core\index.py:756: UnicodeWarning: Unicode equal comparison failed to convert both arguments to Unicode - interpreting them as being unequal
    return self._engine.get_loc(key)

And can&#39;t find where it&#39;s from.

After some research, I tried to do that in the Pandas lib file (index.py):

    try:
        return self._engine.get_loc(key)
    except UnicodeWarning:
        warnings.warn(&#39;Oh Non&#39;, stacklevel=2)

But that didn&#39;t change anything about the warning message.

How to find out where a Python Warning is from

This should be obvious to do, but I just couldn&#39;t make it work...

What I&#39;m trying to do is simple: **I would like my compilation to fail with an error if there is a warning**. Yes, the famous `TreatWarningsAsErrors`...

I configured it in my C# project properties

![treat warnings as errors][1]

This results in the expected `TreatWarningsAsErrors` section in my csproj:

    &lt;TreatWarningsAsErrors&gt;true&lt;/TreatWarningsAsErrors&gt;

So far so good, if I add an useless `private` variable in my code, it results in a compilation error:

    private int unused;

&gt; Error	3	Warning as Error: The field &#39;XXXX.unused&#39; is never used

But the whole problem is, I can&#39;t make it work for **assembly reference issues**. If I have a reference to an unknown assembly, the compiler (either devenv or msbuild) throws a warning, but I want an error instead.

Ultimately, I&#39;m trying to configure a gated check-in TFS build configuration, so TFS would reject a commit in case there is a &quot;*The referenced component &#39;XXXX&#39; could not be found.*&quot; warning. Something simpler than modifying the build process template would be great.


  [1]: http://i.stack.imgur.com/UoLt2.png

Treat all warnings as errors

I am trying to test the iCloud sync functionality of my app between a (real) device and the simulator, however I can&#39;t seem to log into iCloud. When I go to Settings-&gt;iCloud and enter my account details, it just gets stuck on &#39;Verifying&#39;. However if I enter incorrect details, it brings up the invalid password prompt as expected.

Has anyone got a fix for this? 

iOS Simulator - Can&#39;t log in with iCloud

I am in the early stages of creating an app where I would like to save, sync and backup data.  The app will not store any files just data in a database. It is going to be iOS 8 and up so I am able to use CloudKit.  I did some research and still not clear on how Core Data, iCloud and CloudKit work together. 

As far as understand CloudKit is just a way of getting and retrieving data to/from the cloud. Is CloudKit just a different way of syncing data with iCloud?

My questions are: 

1. If I do use CloudKit, do I still need to create local core data database?
  - If yes will it be automatically synced with iCloud or I would have to call methods to store to both places?

2. If the data is only stored in the cloud will user be able to access it when iOS device is not connected to the internet. I read that CloudKit will have only limited caching.
3. How will that work if iCloud account is not enabled. 

If someone can kind of break down what each technology does in the process of saving and syncing core data database offline and online.
 
My current understanding is:

 - Core Data is used to store data locally 

 - iCloud syncs the data and stores in the cloud 

 - CloudKit gives the ability to store and manage data in the cloud??

I hope I provided enough info for this question not to get closed.

Using Core Data, iCloud and CloudKit for syncing and backup and how it works together

I accidentally created a new container in CloudKit, and it is really annoying that it comes up when I open dashboard. Any suggestion how to delete? On developer.apple.com I don&#39;t see a delete button for containers.

Content Type	Original Author	Original Content on Stackoverflow
Question	reza23	View Question on Stackoverflow
Solution 1 - Iphone	Joshua Walcher	View Answer on Stackoverflow

iCloud and GEOResourceManifestServerRemoteProxy: Lost connection to geod warning

Iphone Problem Overview

Iphone Solutions

Solution 1 - Iphone

If/else statements in ANTLR using listeners

Pandas - make a column dtype object or Factor

Attributions