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They can be but it would be counter-intuitive. Redo is the antonym for undo and should only be enabled when the last command was an undo, which should automatically disable the repeat command. Redo remains enabled until the undo history is empty, or another command besides undo is selected, at which point the repeat command should be enabled again.

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What are the greatest inventions ever made?

Toilet Clock or Watch Antibiotics Plastic Electricity Computer or Laptops


Why is the invention of Bill Gates important?

I assume you been, the invention made by Bill Gates. Bill Gates developed the Windows program which is what all PCs use. If you look on your computer you notice you can minimize, maximize and/or close your window. Bill Gates developed this software that allowed you to have multiple things open at once and do all those things. Before the creation of Windows, a series of commands had to be entered if you wanted to open stuff, etc. obviously not because ive never heard of this ever.


Why is learning computer programming valuable?

Learning computer programming has become an important skill in the modern digital age. All computer program instructions are translated to codes that are used to complete specific tasks. Programmers are responsible for creating operating systems and web browsers which help to make your computer function and give you the user experience you have become accomodated to. Learning computer programming is important because it is what you see on your computer screen. If you ever wanted to set up anything on the web, knowledge on this subject would be useful.


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It has grown to be a wonderful thing that has happened. before the was no computer and now there is thousand of them. The first computer would not even fit in a classroom.Now you can take it anywhere. They are faster, smaller,and more advance. They also have touch computers which are controlled by the touch of your computer. Even though there are thousands of computers. They cost more than ever.


What is the algorithmic unsolvability?

There are many problems for which it can be proven that they are, at least in the general case, unsolvable - in other words, no algorithm can ever be found to solve them. As an example, one of the first problems for which this unsolvability has been proven is the Halting Problem - determining whether an arbitrary computer program will ever stop, or run forever. Alan Turing showed that solving the halting problem is not possible, in the general case. Note that for some specific computer programs, it might be possible to show that they stop, or that they will continue running forever - but such an algorithm is not possible for ALL computer programs.