Maruti car is mainly based on which technology? Television was invented by:. Suggested Test Series. Suggested Exams. More General Knowledge Questions Q1. In which year Indian government has enacted the Consumer Protection Act? The activities in primary, secondary, and tertiary sectors are. What does the V mean in Ctrl V? What is the opposite key of Ctrl Z? How do I get my Ctrl Z back? What does Ctrl Q do? What is Ctrl F? Can you Undo control Z?
What are the advantages of using Undo and redo? Why does undo typing keep popping up? You can reverse more than one action that has been undone. You can use Redo command only after Undo command.
Seeing how things have been lately, it's worth finding an answer for this question before someone attempts to patent the idea. Re:Good question Score: 1. Actually, I once saw a patent plaque for a method to handle undo in software, hanging on the walls at IBM's main software group building.
So you may be too late. Re:Good question Score: 2 , Funny. Arabian Nights? Of course, this was long before computers but it still worked like magic. IN Score: 1 , Troll. Re:IN Score: 1 , Offtopic.
That is soooo Re:I'd like to know Score: 1. I'm pretty sure it's just incremental changes saved in memory. This can be a huge problem if you work with sensitive information. With this "feature", sensitive information from a client's case can make its way into documents for other cases.
That's one of the reasons that informed lawyers still use Wordperfect. MS Word question Score: 1. Re:MS Word question Score: 2. Not sure about that, I've never really cared but you can easily do "save as" and pick some format other than. Re:I'd like to know Score: 4 , Interesting. Here's what one well known Academy Award winning 3D package does. Every command is an object. When you execute a command that object is stored in a 'history'. The command has two methods, a do method and an undo method.
As long is the object remains alive it can undo or redo the associated operation. If you do your software design properly, it is surprisingly easy to implement undo.
I remember the first time I implemented it, in a course in university. I was planning on that feature alone taking a day to get in place iirc, we were implementing a bookmark manager in Java. And redo is just as easy to implement as undo, provided you did undo correctly.
Score: 4 , Funny. I can run a tangent off topic! Re:I can run a tangent off topic! Of course, things went different with the Commodore Re:is it just me Slippery writes:. Try thinking "Command-Z" Score: 5 , Informative. That's right people Apple did it first at least in a consumer machine.
The original Macintosh had "undo" functionality in its applications, right from the start. There may have been one or two individual applications before it I don't know but the Mac made "undo" ubiquitous. Re:Try thinking "Command-Z" Score: 4 , Informative. Although, IIRC there wasn't originally a command key associated with it All the major editing command keys were in the one location.
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