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Search found 354 results on 15 pages for 'ahmed zubair'.

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• Is there an open source database/key value for windows that allows me to dynamically add/remove node

  - by Zubair

  I'm looking for something like Riak, but which can run as a native windows application, and can handle failures, addition or removal of nodes, etc.

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• How to get properties from Cassandra with get_slice in Erlang?

  - by Zubair

  I am using Erlang to interface with Cassandra and I cannot get the get_slice command to return a list of all the columns of a row. I use: X = thrift_client:call( C, 'get_slice', [ "Keyspace1", K, #columnParent{column_family="KeyValue"}, #slicePredicate{}, 1 ] ), : but I get back : invalidRequestException,<<"predicate column_names and slice_range may not both be null">> : However, using the cassandra-cli interface this works fine. Any ideas?

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• How can I add imports to an "eval"ed piece of clojure code?

  - by Zubair

  I would like to evaluate some clojure code entered by users interactively, and I would like to "use" certain namespaces and "import" certain Java classes as well. I end up running the code using: (defn execute-command [string-command] let [ code-with-context (add-code-context string-command) result (eval(read-string code-with-context)) ] result ) My question is how can I program "add-code-context" to add the required context to the code in "string-command"?

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• File format readable/writable by business people

  - by Zubair

  I am creating a document database which business people will be able to easily send documents to. Which file format do you think is the most understandable and easy to write by business / non-technical people? My current contenders are XML, JSON, and YAML

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• Is MapReduce such a generalisation of another programming principle?

  - by Zubair

  I'm getting into parallel programming and I'm studying mapreduce and other distributed algorithms. Is it best just to learn mapreduce or is there a more general algorithm that will serve me better?

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• What is a "wrapper service" in SOA?

  - by Zubair

  I have looked on the web but I am confused as to whether a wrapper service wraps a legacy application, or a set of complex services.

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• Is there a stable Cassandra library for Erlang?

  - by Zubair

  Is there a stable Cassandra library for Erlang? I can't seem to find one

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• Why is there no middleware in Erlang?

  - by Zubair

  I asked a question earlier about ESBs written in Erlang or Java, and there didn't seem to be anything in Erlang, and only products in Java. http://stackoverflow.com/questions/2453641/what-would-be-the-best-language-in-which-to-write-an-esb/2453683#2453683 I guess I find it difficult to understand why a language like Erlang has no such middleware products, especially seeing as it should be ideally suited to the job.

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• How can I reload .emacs after changing it?

  - by Zubair

  I am new to emacs and I am playing around with the .emacs file. How can I get it to reload all my definitions that I have updated in.emacs without restarting emacs?

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• How do the different services in Oracle SOA relate to each other?

  - by Zubair

  I'm am trying to figure out how the Oracle "Layered Architecture Model" works, and I am very confused about what the business, data, and presentation do, and how they relate to each other. I have seen many diagrams showing how this should work, but some real world examples would be useful?

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• How can I implement a list over an eventually consistent database?

  - by Zubair

  I want to implement lists and queues over Cassandra, Riak, or any other eventually consistent store. Is this possible and how could I do it?

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• Is it possible to package an Erlang program as a .exe file?

  - by Zubair

  It has to be self contained, some sort of Erlang runtime library, and the BEAM files. This is so that anyone can run the program with one click, by running a .exe off a network drive, without having to install Erlang or anything else.

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• Which is more suitable on Windows, git or mercurial?

  - by Zubair

  I actually use a combination of OS X, Linux and Windows, but Windows is the most important.

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• Could a hashing algorithm be used to save space in a database?

  - by Zubair

  I have been using git a lot recently and I quite like the concept of how GIT avoid duplicating similar data by using a hashing function based on sha1. I was wondering if current databases do something similar, or is this inefficient for some reason?

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• Resultset To List

  - by Gnaniyar Zubair

  I want to convert my Resultset to List in my JSP page. and want to display all the values. This is my query: SELECT userId, userName FROM user; I have executed that using preparedstatement and got the Resultset. But how to convert it as a List and want to display the result like this: userID userName ------------------ 1001 user-X 1006 user-Y 1007 user-Z

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• Network bandwidth bottleneck for sorting of mapreduce intermediate keys?

  - by Zubair

  I have been learning the mapreduce algorithm and how it can potentially scale to millions of machines, but I don't understand how the sorting of the intermediate keys after the map phase can scale, as there will be: 1,000,000 x 1,000,000 : potential machines communicating small key / value pairs of the intermediate results with each other? Isn't this a bottleneck?

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• What are the benfits of a standalone Windows .exe vs an installer?

  - by Zubair

  I am trying to make an application as easy to deploy as possible for Windows and I am trying to choose between packaging the application as a .exe or using an installer. I was wondering if anyone had opinions on the relative merits of either way? My preference would be to use a .exe as it would be just click and run for a user.

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• Is there an efficient way to query a document database?

  - by Zubair

  Since document databases store records in tree like structures the fields will never be at set positions. Does this make querying a document database inefficient, or would indexes just be used as with a normal relational database?

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• Can't import clojure records

  - by Zubair

  I have created a record like this: (defrecord User [user-id email]) :but when I try to access it from another name-space I get the error: (User. "name" "email") java.lang.IllegalArgumentException: Unable to resolve classname: User It works when I do: (oe.model.modelcore.User. "name" "email") : I know I will need to import the Java class, but is there any way for clojure to do this automatically when I do: (use 'oe.model.modelcore :reload)

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• What is the most efficient way to perform a range query over a cluster of nodes?

  - by Zubair

  What is the most efficient way to perform a range query over a cluster of nodes where I want the result sets merged?

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• How can I start a web browser and open a certain web page from Erlang on Windows in IE?

  - by Zubair

  I have an erlang program which runs a server on a local machine and I would like it to start a local web browser and point to itself on startup. How can I do this in a portable way across Windows XP. Vista, and Windows 7?

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• Is there a version of Emacs thats runs exactly the same on OSX, Windows and Linux?

  - by Zubair

  I'm using Emacs on different environments and unsure of which version to use so that they all behave the same as I hear there are differences between XEamcs, Emacs, and some other versions. Which should I use?

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• Returning an error code in Erlang

  - by Zubair

  I'm writing some Erlang code and I'm very unsure whether I should let everything fail fast. One problem I find with fail fast is that for the developer/user the exception generated is pretty meaningless. Any idea what I should return which would not give esoteric and hard to read stack traces?

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• Determining if an item is a string or a list in Erlang

  - by Zubair

  I am writing a program that can have either a list or a string as an argument. How can I tell the difference between a string and a list programmatically in Erlang. Something like: print(List) -> list; print(String) -> string.

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• Is Pseudo typing in Erlang the way to get types?

  - by Zubair

  For example, to denote a String I could use: {string,"hjggjhhggJ"} and a list would be: {list, [1,2,3]} : I guess I have found that I am running into situations where I need types, for example to distinguish between strings and lists and I am not sure how to proceed. I do however want to use whatever technique I choose everywhere in my Erlang application for consistency, and not just for strings and lists. Any advice?

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