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  • Handling Solr read and write timeout exception

    - by Azhar
    Hello, I am new to solr. I have developed a an website which uses solr for indexing. I want to handle the timeouts that can occur during solr read and write index.Please guide me on how can i handle these exceptions. I am using solrj as solr client and my website and solr server are running on the tomcat. Thnak you!

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  • iframe/script attack to website

    - by Ram
    I faced a website attack problem that some malicious javascript code added to all pages in my webiste. Recently I faced another problem that my website is attacked with the following "iframe" tag. iframe src="http://shopmovielife.cn:8080/index.php" width=127 height=167 style="visibility: hidden" Even if I remove this tag, the index file of website is updated on daily basis. What would be the reason for this behaviour? Please give me a solution to solve this.

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  • polynomial multiplication using fastfourier transform

    - by mawia
    i am going through the above topic from CLRS(CORMEN) (page 834) and I got stuck at this point. Can anybody please explain how the following expression, A(x)=A^{[0]}(x^2) +xA^{[1]}(x^2) follows from, n-1 ` S a_j x^j j=0 Where, A^{[0]} = a_0 + a_2x + a_4a^x ... a_{n-2}x^{\frac{n}{2-1}} A^{[1]} = a_1 + a_3x + a_5a^x ... a_{n-1}x^{\frac{n}{2-1}} WITH REGARDS THANKS

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  • iPhone :Can we add more than One application in a Single application

    - by iPhone Fun
    Hi all, I do have an Idea to integrate with my application. I want to create multiple application within a single one application. Like and application containing Weather application as well as image processing application + camera based application. I want to know Is this thing possible with iphone application? Please suggest me is this possible with iPhone app development and is it allowed by apple or not. thanks for your suggestion in advance.

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  • Using Tor behind a proxy ?

    - by atkck
    hi, i'd like to use TOR/polipo behind a proxy like below ME -- POLIPO -- TOR -- PROXY SQUID -- WEB Couldn't find how to do that. When specifying a parent proxy for polipo, it goes straight for it without using TOR so my IP Adress doesn't change. Please any idea is welcome.

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  • Best Maven plugins

    - by ripper234
    We are just moving to Maven, and I understand there is a world of different plugins & extensions. Which are the best ones you recommend for general usage? (On plugin per answer please)

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  • Hidden Features of Erlang

    - by pageman
    In the spirit of: Hidden Features of C# Hidden Features of Java Hidden Features of ASP.NET Hidden Features of Python Hidden Features of HTML and other Hidden Features questions What are the hidden features of Erlang that every Erlang developer should be aware of? One hidden feature per answer, please.

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  • Ruby Canvas (GUI)

    - by Eugene
    Hi dear community! I need draw some lines/circles/rect/etc from ruby into something like canvas. I tried wxRuby and fxRuby but they are have no good examples to draw simple lines. Just tried to install qtruby on Windows and its fall cause of some number of errors. So: 1) Which API for ruby to draw on canvas I need? 2) Give me a little sample of it (full code please)? Sincerely Eugene

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  • Faster Matrix Multiplication in C#

    - by Kyle Lahnakoski
    I have as small c# project that involves matrices. I am processing large amounts of data by splitting it into n-length chunks, treating the chucks as vectors, and multiplying by a Vandermonde** matrix. The problem is, depending on the conditions, the size of the chucks and corresponding Vandermonde** matrix can vary. I have a general solution which is easy to read, but way too slow: public byte[] addBlockRedundancy(byte[] data) { if (data.Length!=numGood) D.error("Expecting data to be just "+numGood+" bytes long"); aMatrix d=aMatrix.newColumnMatrix(this.mod, data); var r=vandermonde.multiplyBy(d); return r.ToByteArray(); }//method This can process about 1/4 megabytes per second on my i5 U470 @ 1.33GHz. I can make this faster by manually inlining the matrix multiplication: int o=0; int d=0; for (d=0; d<data.Length-numGood; d+=numGood) { for (int r=0; r<numGood+numRedundant; r++) { Byte value=0; for (int c=0; c<numGood; c++) { value=mod.Add(value, mod.Multiply(vandermonde.get(r, c), data[d+c])); }//for output[r][o]=value; }//for o++; }//for This can process about 1 meg a second. (Please note the "mod" is performing operations over GF(2^8) modulo my favorite irreducible polynomial.) I know this can get a lot faster: After all, the Vandermonde** matrix is mostly zeros. I should be able to make a routine, or find a routine, that can take my matrix and return a optimized method which will effectively multiply vectors by the given matrix, but faster. Then, when I give this routine a 5x5 Vandermonde matrix (the identity matrix), there is simply no arithmetic to perform, and the original data is just copied. ** Please note: What I use the term "Vandermonde", I actually mean an Identity matrix with some number of rows from the Vandermonde matrix appended (see comments). This matrix is wonderful because of all the zeros, and because if you remove enough rows (of your choosing) to make it square, it is an invertible matrix. And, of course, I would like to use this same routine to convert any one of those inverted matrices into an optimized series of instructions. How can I make this matrix multiplication faster? Thanks! (edited to correct my mistake with Vandermonde matrix)

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  • Choosing suitable background / foreground colour using PHP

    - by Lizard
    I am looking to find a why to calculate a suitable background colour and a colour for the text that would go over the top, obviously I need to take into account readability and accessibility. I would need to pick the two colours from the array, the colours are stored in their hex representations. #CC9966 #996633 #FFCC99 #CCCC99 #000000 #333333 #666633 #663333 #CC9933 #FFCCCC I can use a PHP library like GD / imageMagick? Any suggestions (Please note I am using PHP)

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  • CSS hack for Safari ONLY

    - by Jakub Lédl
    Hey guys, I'm solving one task and I need to create a piece of CSS what would apply only in Safari, NOT the other WebKit browser (mustn't apply in Chrome, f.e.). Please, could anyone toss in some ideas?

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  • Using web view behind a proxy (cocoa)

    - by Cal S
    Hi, I'm creating a web-browser type app (using a web view object) that needs to be able to connect to the internet via a proxy. Server, port, username and password can all be hardcoded into the app but unfortunately I have no idea how to customise the proxy settings of a web view without changing the system wide proxy settings. If you know how to do this please provide some example code, thanks a lot! (Also, if it changes anything - I'm developing for mac, not iPhone)

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