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Can someone please elaborate the difference between mpi and mapreduce?
For an explanation of what MPI is, see this question. For an explanation of what MapReduce is, please see this question.
There are some differences between both. MPI is a standardized API that has multiple implementations such as OpenMPI or MPICH. MapReduce is mostly a programming paradigm that has a vast amounf of implementations in different programming and database languages.
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I wonder how it is possible to make a visual presentation of algorithm.
I found a very good visualization in Wikipedia like following:
If you know how to make a similar presentation, please let me know.
There are lots of libraries in various languages that can be used to visualize whatever you want, but according to this page:
http://en.wikipedia.org/wiki/File:Sorting_quicksort_anim.gif
The picture you're looking at was:
Created with: Ruby 1.8.4, RMagick.
Just for reference.
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Scheme lists are slow for random access, which is a common operation in many applications such as image processing. Does this make it naturally handicapped for that kind of application?
If performance is a concern, then you should definitely consider using fixed-access-time structures. Fortunately, Scheme has lots of these, too. The "vector" is the simplest one; it's a close match to what most languages call an "array".
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This is a trivial question - but something I always miss in the day-to-day programming.
Is there a gook lookup reference available for the common algorithms that we usually face in our everyday programming - sorting,sequences,graphs.
The emphasis is more on the applicability and pseudocode ,rather than the mathematical proofs(which I find is what books tend to stress on).
The idea is to keep a ready reference,as and when we need to resort to one of these algorithms into our respective development project and languages.
Dictionary of Algorithms and Data Structures
How about this?
List of algorithms#Wikipedia
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I have two NFA's.
I need to determine whether both recognize the same language
I would be much obliged if anyone could be so kind enough to explain how to do this.
You can get a canonical representation of an NFA by computing its equivalent minimal DFA.
If two NFA's have the same canonical representation, they accept the same language.
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I have a question in my exam that I don't know how to answer it:
Consider that you have a machine for personal use and you are developing various programs. Before going to lunch you want to leave five large programs to compile. In this scenario justifies what / which of the following scheduling algorithms would select: First Come First Served, Shortest Job First, Round Robin or Priority scheduling.
I'd honestly chose Shortest Job First for the simple reason that when I come back from lunch I want to have as many programs available to debug and test as possible.