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  • MongoDB or CouchDB - fit for production?

    - by Alan
    I was wondering if anyone can tell me if MongoDB or CouchDB are ready for a production environment. I'm now looking at these storage solutions (I'm favouring MongoDB at the moment), however these projects are quite young and so I foresee that I'm going to have to work quite hard to convince my manager that we should adopt this new technology. What I'd like to know is: 1) Who is using MongoDB or CouchDB today in a production environment? 2) How are you using MongoDB/CouchDB? 3) What problems (if any) did you come across when you adopted this new storage mechanism (and how did you overcome them)? 4) How did you deal with any migration issues that you had to deal with? 5) Do you have any good/bad experiences with either of these solutions that you'd like to share? Thanks.

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  • Connect two daemons in python

    - by Simon
    What is the best way to connect two daemons in Python? I have daemon A and B. I'd like to receive data generated by B in A's module (maybe bidirectional). Both daemons support plugins, so I'd like to shut communication in plugins. What's the best and cross-platform way to do that? I know few mechanisms from low-level solutions - shared memory (C/C++), linux pipe, sockets (TCP/UDP), etc. and few high-level - queue (JMS, Rabbit), RPC. Both daemons should run on the same host, but obviously better approach is to abstract from connection type. What are typical solutions/libraries in python? I'm looking for an elegant and lightweight solution. I don't need external server, just two processes talking with each other. What should I use in python to do that?

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  • Update JSON file C# W8 development

    - by AndrewB
    At the moment, I've got a JSON file with content looking like this: { "username": "test", "someNumber":100 } I'm using JSON.Net to fetch the .JSON file from a webserver - C#: var http = new HttpClient(); http.MaxResponseContentBufferSize = Int32.MaxValue; var response = await http.GetStringAsync(URI); var result = JsonConvert.DeserializeObject<DatClass.Result>(response); This works great together with the class getting/setting the properties. However, what I would like to know is whether there's a good way for a user to update the .JSON file through a textbox UI? As in: [textbox - update username] [update button] - username sent to server - .JSON file updated - [textblock - showing updated username in UI]. I'm not looking for exact code solutions, I'm rather looking for good solutions on this, and/or if this is a terrible idea of an easy database(?).

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  • Optimize innodb table

    - by ming yeow
    When i run optimize table on a innodb table, i get this message instead. does it mean that the table has already been optimized, but in a different manner? "table | optimize | note | Table does not support optimize, doing recreate + analyze instead |"

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  • Insert Image in richTextBoxControl

    - by Rahat
    What is the best way to insert an image programatically into the RichTextBox control in C# Winforms? If the method is using Clipboard then what is the optimized way to keep the Clipboard original data (i.e. the data state before placing my image on the Clipboard) available to be replaced after my temporary usage of Clipboard for inseting my image in Rich Text Box Control.

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  • SEO friendly javascript and CSS links?

    - by Sattvic
    Is it possible to have a navigation system optimized using javascript, but for the sake of search engines, have the hyperlinks still be crawlable? Or maybe a condition statement that calls HTML code only if javascript is not enabled in the browser or when crawled by a search engine?

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  • Optimizing list comprehension to find pairs of co-prime numbers

    - by user3685422
    Given A,B print the number of pairs (a,b) such that GCD(a,b)=1 and 1<=a<=A and 1<=b<=B. Here is my answer: return len([(x,y) for x in range(1,A+1) for y in range(1,B+1) if gcd(x,y) == 1]) My answer works fine for small ranges but takes enough time if the range is increased. such as 1 <= A <= 10^5 1 <= B <= 10^5 is there a better way to write this or can this be optimized?

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  • Conditional themes in Visual Studio 2008

    - by Bala R
    Can I have different visual studio themes associated to different solutions? Here's my problem. I have two files with sames names that have almost identical contents from two different solutions, open simultaneously. Of course, I have the first solution open and the file from the second solution is opened from explorer and has no connection to the first solution what so ever. Is there any way I can distinguish the the file that belongs to the solution from the other file, just by a different tab color or something like that and without hovering over the tab to look up the path. Thanks

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  • C# Dynamic Query Without A Database Model

    - by hitopp
    I have been searching the web for a solution to dynamic queries. I have found many different solutions (e.g. Linq to Sql, Dynamic Linq Expressions, Dynamic Query), but all of these solutions involve some sort of previous knowledge of the database (like a model in code). Maybe what I am asking is way off the deep end, but is there any possible way to dynamically query a database without a model? For example, a database has a Customers table with the following columns: CustomerID Name FavoriteColor I want to create a query as SELECT Name FROM Customers WHERE @0 = @1, where the two placeholders are populated dynamically. The resulting data does not tie to a model class and I would prefer to use some sort of framework to build the queries, not simple string concatenation. The System.Linq.Dynamic namespace came really close to fulfilling this request, but it uses a database model. I realize this is crazy, but I was just curious.

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  • Read Text File line by line using Command Prompt/Batch

    - by user353305
    Hello All, First of all I am very thankful to the owner of this website. I have learned and implement various technologies with the help of solutions provided by the readers. I know the question I asked is posted many time in this forum. And I have tired all of the solutions available, but no luck I may case I am trying to read a dat file which is basically a msg/feed file having more than 22000 Characters. Every line may or may not be of same length. My requirement is to convert the file to fixed line length character file. I have a logic that work well using vb script, however its pretty slow. I have checked with For f/ but no luck. The only delimiter I have is EOT, which i can see in Textpad but not in notepad. I have tried with \n, token=. Please help me in resolving the issue. Regards, Rajiv [email protected]

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  • NoSQL for concurrent reads/writes

    - by Mickael Marrache
    After getting some performance issues for an application using a MySQL database, I'm thinking of using NoSQL solutions. My architecture is as follows: One application receives messages from the network at a high throughput (i.e. 50000 messages/sec). Each message is stored in the DB, so it's important for the write rate to be as fast as the arrival rate. Then, I also have some PHP pages that accesses the DB to get the data stored by the other application. It's important for me that the retrieved data is as relevant as possible (i.e. not old data, let's say not more than 5 seconds old). Also, the data is not critical, so I don't need any security mechanism to avoid losing the data. I see there are a lot of NoSQL solutions, but I don't know if they are all relevant. Could you please provide me some directions. Thanks

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  • Dynamic Programming resources in C?

    - by EsotericMe
    Hi everyone, I'll be writing the online Google test tomorrow as a fresher. Apparently, they definitely ask one problem on Dynamic Programming? Does anyone know of a good resource for collection of DP problems in C along with solutions? I know what DP is & have used it on an occasion or twice. However I feel to crack a DP problem in test, prior practice of typical problems will make it easier to approach. Any good resources or problem sets with solutions in C will be highly appreciated. Thanks.

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  • Visual Studio 2005 - strange characters rendered for ANSI text

    - by Apogee
    Hi all, Has anyone seen this odd text rendering issue in VS2005 before? The first line of using statements actually says "using System;". If I copy the line as it is displayed and paste into notepad, the text appears correctly, so clearly the character codes are correct. In addition, the solution compiles and runs correctly. I was thinking it might be due to ClearCase using a different character encoding as all the solutions we're using were freshly checked-out yesterday on to a new build machine, but this is only happening in 2 of our ~30 solutions. Incidentally the same .cs files when opened in VS2008 render correctly on this machine, could this be a corruption in VS2005?

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  • Using CONNECT BY to get all parents and one child in Hierarchy through SQL query in Oracle

    - by s khan
    I was going through some previous posts on CONNECT BY usage. What I need to find is that what to do if I want to get all the parents (i.e, up to root) and just one child for a node, say 4. It seems Like I will have to use union of the following two:- SELECT * FROM hierarchy START WITH id = 4 CONNECT BY id = PRIOR parent union SELECT * FROM hierarchy WHERE LEVEL =<2 START WITH id = 4 CONNECT BY parent = PRIOR id Is there a better way to do this, some workaround that is more optimized?

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  • Solving the problem of finding parts which work well with each other

    - by dotnetdev
    Hi, I have a database of items. They are for cars and similar parts (eg cam/pistons) work better than others in different combinations (eg one product will work well with another, while another combination of 2 parts may not). There are so many possible permutations, what solutions apply to this problem? So far, I feel that these are possible approaches (Where I have question marks, something tells me these are solutions but I am not 100% confident they are). Neural networks (?) Collection-based approach (selection of parts in a collection for cam, and likewise for pistons in another collection, all work well with each other) Business rules engine (?) What are good ways to tackle this sort of problem? Thanks

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  • Mysql syntax help

    - by Karthick
    Query: select t1.col1 from table1 t1 inner join with (nolock) table2 t2 on t1.col2 = t2.col1 Am trying to use nolock option for optimized query in mySQL db, but for some reason the above query does not work and the error i receive is You have an error in your SQL syntax; Any thoughts?

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  • How do I get developers to look at our bug tracking page regularly?

    - by abeger
    We've recently started using Trac and are still trying to figure out the best way to use it in our environment. It's great, but it will only be effective if developers look at it once in a while and I'm trying to figure out how to instill that habit in them. I've contemplated several solutions, such as: forcing them to use Trac as their homepage (too draconian) handing out bookmarks to the RSS feeds (same problem--no one will look at them) automatic email notifications (won't drive them to the site and might just annoy them more than anything else) What are some other solutions? What have you tried that worked?

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  • Experience with protecting PHP code

    - by Alec Smart
    Hello, I am aware of that there are a number of code obfuscators/licensing programs for PHP. I wanted to know if anyone has actually used these and what their experience has been. Please note I do not want to know the solutions available. I want to know your experience using one of these solutions. Is it worth investing say 200$ purchasing a code obfuscator etc? I honestly would prefer something that does not have a loader etc. I know that it increases the chances of cracking, but I only want it to be a detrimental factor for them. Thank you for your time.

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  • How to implement a book preview (2 page spread) without using Flash?

    - by littlejim84
    I'm looking into a solution for work, where you have a two page spread of the book to preview. Either side of this, you can hover in the corner to create a pseudo-flip and then click the mouse button to actually turn the page. I know there is many Flash solutions out there, but in this case we cannot use it... So we are looking for a possible solution that can work across all major browsers (yes, including IE6)... I looked a few canvas solutions, but with Google's canvas extension for IE, these will terribly slow. So was thinking about an SVG/VML solution, like Raphael Javascript library. This could be good, but then trying to look into how to code this, without examples, could be a challenge with the time constraint. Is there a solution out there that fits (or almost fits) this problem?

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  • ConcurrenctBag(Of MyType) Vs List(Of MyType)

    - by Ben
    What is the advantage of using a ConcurrentBag(Of MyType) against just using a List(Of MyType)? The MSDN page on the CB (http://msdn.microsoft.com/en-us/library/dd381779(v=VS.100).aspx) states that ConcurrentBag(Of T) is a thread-safe bag implementation, optimized for scenarios where the same thread will be both producing and consuming data stored in the bag So what is the advantage? I can understand the advantage of the other collection types in the Concurrency namespace, but this one puzzled me. Thanks.

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  • 3 DIV's - Center Middle and Others taking up rest of room

    - by Adam
    I need to have 3 DIV's - you can see 3 colors in the above image. The middle DIV needs always be 960px and alls needs to be centered (you can see the 2 grey lines above). The other 2 DIV's need to take up all the other available space. If I zoom in and out of the page the red and yellow DIV's need to expand with the page while the middle green one remains centered. I've tried DIV solutions and Table solutions and I can't get it to fit. HTML <div id="div1" style="background-color:red"></div> <div id="div2" style="background-color:red"></div> <div id="div3" style="background-color:red"></div> any advice would be appreciated. thx ** Update: http://jsfiddle.net/scxAq/ working on this... with limited success...

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  • Which version of .NET is available for Xbox 360?

    - by Rosarch
    I tried to look this up on MSDN, but couldn't get a straight answer. It says: The .NET Compact Framework for Xbox 360 implements a subset of the .NET Compact Framework, and has been optimized to take advantage of and expose the power of the Xbox 360. What exactly is the subset? Which version of the framework? 3.5? 2.0?

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