The .NET System.ComponentModel namespace comes with an IEditableObject interface, you could also use INotifyPropertyChanging and INotifyPropertyChanged. MVC Pattern would also make it that your interface responds to changes in the model through events thus updating or restoring the value of your textbox. Effectively the Memento Pattern. Have you had a look into these? Here is … Read more
Note: this no longer works as of iOS 11 In lieu of that mess with trying to find the UIBarButtonItem’s view in the toolbar’s subview list, you can also try this, once the item is added to the toolbar: [barButtonItem valueForKey:@”view”]; This uses the Key-Value Coding framework to access the UIBarButtonItem’s private _view variable, where … Read more
It isn’t a data structure but a design pattern. You’re looking for the Command Pattern. The standard is to keep the Command objects in a stack to support multi level undo. In order to support redo, a second stack keeps all the commands you’ve Undone. So when you pop the undo stack to undo a … Read more
With the help of this answer, I have worked it out… Go into Settings (Ctrl+Alt + S) Type Redo in the search box. Double-click on the Redo result Select Add Keyboard Shortcut Press Ctrl+Y Click OK Click OK
Put this in your .vimrc to create an undodir if it doesn’t exist and enable persistent undo. Tested on both Windows and Linux. ” Put plugins and dictionaries in this dir (also on Windows) let vimDir=”$HOME/.vim” if stridx(&runtimepath, expand(vimDir)) == -1 ” vimDir is not on runtimepath, add it let &runtimepath.=’,’.vimDir endif ” Keep undo … Read more
According to Apple’s NSInvocation class reference: An NSInvocation is an Objective-C message rendered static, that is, it is an action turned into an object. And, in a little more detail: The concept of messages is central to the objective-c philosophy. Any time you call a method, or access a variable of some object, you are … Read more
You can use the u button to undo the last modification. (And Ctrl+R to redo it). Read more about it at: http://vim.wikia.com/wiki/Undo_and_Redo
Open Settings (press CTRL+ALT+S) Click Keymap on the left list. There is a combobox that contains keymaps. Select one of them (default means IntelliJ of course. We can’t change any of pre-defined keymap however we can copy, edit and then use the edited one. So) we should copy “default” to change only redo mapping. Give … Read more
Short version: by undoing the undo. If you undo, and then do a non-editing command such as C-f, then the next undo will undo the undo, resulting in a redo. Longer version: You can think of undo as operating on a stack of operations. If you perform some command (even a navigation command such as … Read more