Incompatible version of bundler for Ruby
How to `bundle install` when your Gemfile requires an older version of bundler?
Please will someone explain what time dilation really is and how it occurs? There are lots of questions and answers going into how to calculate time dilation, but none that give an intuitive feel for how it happens. I loved the keyboard shortcuts in Windows 7 (i.e. Win + &larr; moves a window to the left side of the screen), but I'm not sure on what some of the new ones might be for Windows 8.  What are all of the NEW keyboard shortcuts that I can use while working in Windows 8? Default poster size What is the typical size for a conference poster? Is it "ask the organizers", or can I safely assume that I'll get a default size, and that there will be enough space to hang it at the poster session? How can I shorten my command line (bash) prompt? Dragon souls not activating new words So if I understand correctly you can learn new words and the souls will activate these words. I just killed a dragon and when it died it looked like I absorbed the soul but it didn't unlock any of the words I have.   I noticed some dragons actually have a name so do certain dragons unlock certain words? how to pass objects between intents What are the blue dots next to App names in iOS and macOS? They disappear once you open the apps and then return to the home screen, but I can't tell what they indicate.  Are they apps that haven't been opened since an app update? Or that it thinks have never been opened (not accurate in my case, but that could be a function of a "restore" confusing the phone). Greatest common divisor of two positive integers What is a good book to learn number theory? What would be a good book to learn basic number theory? If possible a book which also has a collection of practice problems? Thanks. WP List Table custom quick edit box - post meta data missing and columns change on submit I have extended class WP_List_Table to create a custom sortable table of posts along with a quick edit box with custom meta boxes.  The meta boxes populate and save but when I click submit the field values disappear and the defaults ( cb, title, tags, cats, etc) which are not even included in my class get added back to the column saved. This throws off the other columns on the page.  The saved custom field values return when the page is refreshed.  It seams like on submit the $post_object is missing.  I'm using a hacked get_inline_data function that includes the meta_values in my quick edit form instead of calling get_inline_data in my class.  My save function for the meta boxes:  add_action( 'save_post', 'save_inline_edit_meta' ); function save_inline_edit_meta( $post_id  ) {     global $pagenow;      if ( $pagenow == 'admin.php' ) {      if ( isset( $_POST[ 'is_quickedit' ] )  &amp;&amp; isset( $_POST[ 'standinghead' ] ) )         update_post_meta( $post_id, '_wnd_standing_head', $_POST[ 'standinghead' ] );      if ( isset( $_POST[ 'is_quickedit' ] )  &amp;&amp; isset( $_POST[ 'headline' ] ) )         update_post_meta( $post_id, '_wnd_alt_title', $_POST[ 'headline' ] );      if ( isset( $_POST[ 'is_quickedit' ] )  &amp;&amp; isset( $_POST[ 'deck' ] ) )         update_post_meta( $post_id, '_wnd_deck', $_POST[ 'deck' ] );     }   return $post_id;  }   My Javascript save function:  save : function(id) {         var params, fields, page = $('.post_status_page').val() || '';          if ( typeof(id) == 'object' )             id = this.getId(id);         $('table.widefat .inline-edit-save .waiting').show();         params = {             action: 'inline-save',             post_ID: id,             post_type: 'post',             edit_date: 'true',             post_status: page         };         fields = $('#edit-'+id+' :input').serialize();         params = fields + '&amp;' + $.param(params);          $.post('admin-ajax.php', params,             function(r) {                 $('table.widefat .inline-edit-save .waiting').hide();                  if (r) {                     if ( -1 != r.indexOf('&lt;tr') ) {                         $(inlineEditPost.what+id).remove();                         $('#edit-'+id).before(r).remove();                         $(inlineEditPost.what+id).hide().fadeIn();                     } else {                         r = r.replace( /&lt;.[^&lt;&gt;]*?&gt;/g, '' );                         $('#edit-'+id+' .inline-edit-save .error').html(r).show();                     }                 } else {                     $('#edit-'+id+' .inline-edit-save .error').html(inlineEditL10n.error).show();                 }             }         , 'html');         return false;     }, I got a UK visa for one month (restricted validity). It expires on November 4. Pakistani citizens are eligible to apply for a Turkish e visa if they have a valid UK visa. I want to visit Istanbul for a couple of days - from October 31 to November 2. Would I be eligible to still apply for an e visa?   My visa is for single entry. It's valid from October 4 to November 4. Why is the following C# code not allowed:  public abstract class BaseClass {     public abstract int Bar { get;} }  public class ConcreteClass : BaseClass {     public override int Bar     {         get { return 0; }         set {}     } }      CS0546 'ConcreteClass.Bar.set': cannot override because 'BaseClass.Bar' does not have an overridable set accessor Number of ways to write n as a sum of k nonnegative integers How many ways can I write a positive integer $n$ as a sum of $k$ nonnegative integers up to commutativity?  For example, I can write $4$ as $0+0+4$, $0+1+3$, $0+2+2$, and $1+1+2$.    I know how to find the number of noncommutative ways to form the sum: Imagine a line of $n+k-1$ positions, where each position can contain either a cat or a divider. If you have $n$ (nameless) cats and $k-1$ dividers, you can split the cats in to $k$ groups by choosing positions for the dividers: $\binom{n+k-1}{k-1}$. The size of each group of cats corresponds to one of the nonnegative integers in the sum. Coconut Water from White vs Brown Coconuts How can I undo "always allow" in keychain item Can't do comparison on PageReference In my page constructor I call a method isFirstPageLoaded, to  check if the loaded page is the first page of the wizard.   private final PageReference FIRSTPAGE = Page.Maintenance_Lock_1;   private void isFirstPageLoaded() {          if(ApexPages.currentPage()!=this.FIRSTPAGE) {              throw new MaintenanceLockException(this.FIRSTPAGE + ' --- ' + ApexPages.currentPage());          }      }   The problem is: Even if I open the first page of the wizard, the exception is thrown. How can I compare two PageReferences? I would like to avoid to parse the URLs and remove parameters etc... poll() failed, context incorrect? - Example: bpy.ops.view3d.background_image_add() Reverse / invert a dictionary mapping I'd like to build a version of Ubuntu that has absolutely no ability to recognize any USB device inserted. Is this possible?  There's the issue that mouses and keyboards nowadays are connected via usb, so I wonder if it's possible to recognize these but not everything else.  In the end it's a security measure, so different solutions to achieve this goal are also welcome. How do I translate strings in Twig templates? I am working on a (my first) Drupal 8 project witch is a multilingual site. Drupal 8 really delivers in terms of native support for content translation.  However, I have a few strings set directly in some if the theme .Twig template files printed out like ex.   {{ 'Read more'|trans }}   I am really stuck on where to handle the translation for strings like these within the Drupal 8 installation.  What steps do I need to take to be able to translate these strings into the language currently selected for on the site? Do I need any additional modules other than the ones included in Drupal 8 core?  Steps I have taken:   Activated the Content Translation &amp; Interface Translation modules Added Twig strings like {{ 'Read more'|trans }} Flushed cache and refreshed pages containing the strings Checked admin/config/regional/translate for the strings with no result