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• help with number calculation algorithm [hw]

  - by sa125

  Hi - I'm working on a hw problem that asks me this: given a finite set of numbers, and a target number, find if the set can be used to calculate the target number using basic math operations (add, sub, mult, div) and using each number in the set exactly once (so I need to exhaust the set). This has to be done with recursion. So, for example, if I have the set {1, 2, 3, 4} and target 10, then I could get to it by using ((3 * 4) - 2)/1 = 10. I'm trying to phrase the algorithm in pseudo-code, but so far haven't gotten too far. I'm thinking graphs are the way to go, but would definitely appreciate help on this. thanks.

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• can you customize adobe acrobat reader "security warning"

  - by akaphenom

  We need to insert a web beacon (i know taboo) in to adobe PDFs to know when they are opened, as one of our clients is moving to a model of "giving" their documents away and following up repeat viewers for subscriptions. Its not enough to be able to provide a download, they want to attach the PDF to an email and "blast" to directed recipients (double-opt-in etc). Adding the javascript to the pdf is easy enough: (iText) and the "openAction" event. However the security box pops up and displays: "Security Warning" "Document is trying to connect to 'xxxx.yyy.com' if you trusty the site choose Allow. If do not trust the site choose Block" [help] [allow] [block] I don't think we need to completley overhaul the dialogue box, I just think we need to change the middle text to be more descriptive of why we are doing it. Of course our client would love us to remove this completely... Thank you in advance for any feed back you can provide, Todd

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• Why is my Tomcat 6 executor thread pool not being used by the connector?

  - by jwegan

  My server.xml looks like the following: <!--The connectors can use a shared executor, you can define one or more named thread pools--> <Executor name="tomcatThreadPool" namePrefix="catalina-exec-" maxThreads="200" minSpareThreads="4"/> <Connector executor="tomcatThreadPool" port="8080" protocol="HTTP/1.1" connectionTimeout="10000" maxKeepAliveRequests="1" redirectPort="8443" /> <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" /> However, in the Tomcat manager (http://localhost/manager/status) it shows to following http-8080: Max threads: -1 Current thread count: -1 Current thread busy: -1 jk-8009: Max threads: 200 Current thread count: 4 Current thread busy: 1 For some reason it looks like http-8080 isn't using the executor even though it is directed too and jk-8009 is using the executor even though it isn't instructed to. Is the manager just misreporting or have I not setup the thread pool correctly?

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• Reordering matrix elements to reflect column and row clustering in naiive python

  - by bgbg

  Hello, I'm looking for a way to perform clustering separately on matrix rows and than on its columns, reorder the data in the matrix to reflect the clustering and putting it all together. The clustering problem is easily solvable, so is the dendrogram creation (for example in this blog or in "Programming collective intelligence"). However, how to reorder the data remains unclear for me. Eventually, I'm looking for a way of creating graphs similar to the one below using naive Python (with any "standard" library such as numpy, matplotlib etc, but without using R or other external tools).

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• What's viewport mean to the jQuery guys?

  - by justSteve

  I came here intent on asking a 'how do i' type question focused on a particular UI problem i have to solve and i started using the term 'viewport'. Seems there's lots of contexts that tag evokes. Before i outline mine i should ask - is there a generally recognized consensus as to what a 'viewport' is? Any gallery or object browser that focuses on a UI principle where multiple frames/panes show feeds of different graphs where each feed might be a complex grid/graph? I'm imagining something where my page may open with a half dozen different grids (tabular data) stay updated via ajax interactions with various servers. UI elements provide control scale up or down a given grid with a quasi accordion slide kinda thingie. For example, one click on a scale up-or-down control would rescale the other viewports in the opposite direction. More clicks - more pronounced effect. So my 'how do i' question morphs into a 'how have others...' thx

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• iPhone Developer Program - Help?

  - by Cal S

  Hi, I just signed up for the iPhone Developer Program (the $99 one), I filled it all out, was directed to the store and completed the purchase. However, when I go to the member center it says I have not completed the purchase: Your Developer Program Enrollment Status: Once you've completed your purchase, you will receive an Order Acknowledgement email from the Apple Online Store and an Activation email within 24 hours from Apple Developer Support. The email from Apple Developer Support will contain information on how to access the resources of your Program. With a link directing me to a page that adds the program to my cart in the Apple store. (A process I have already been through with a success message at the end) Is this what has happened to everyone else? Aren't I supposed to receive an email from Apple at least confirming the purchase? I have received nothing. Thanks a lot.

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• ASP.net custom error page

  - by c11ada

  hey all, im trying to implement a custom error page, what i want to be able to do is have a single generic error page which can display the error which occurred or other information (custom error message). when a error occurs on the website, the user should be directed to this page which shows the error message. so for example if i had a page which was trying to update something to a database, but something went wrong, i should be redirected to the error page which will have some custom text like something like " there has been an error with bla bla bla ... please contact administrator". hope this makes sense thanks

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• Weird behavior of substitution in Mathematica.

  - by Ilya

  My question is: why doesn't the following work, and how do I fix it? Plot[f[t], {t, 0, 2*Pi}] /. {{f -> Sin}, {f -> Cos}} The result is two blank graphs. By comparison, DummyFunction[f[t], {t, 0, 2*Pi}] /. {{f -> Sin}, {f -> Cos}} gives {DummyFunction[Sin[t], {t, 0, 2 *Pi}], DummyFunction[Cos[t], {t, 0, 2 * Pi}]} as desired. This is a simplified version of what I was actually doing. I was very annoyed that, even after figuring out the annoying "right way" of putting the curly brackets nothing works. In the end, I did the following, which works: p[f_] := Plot[f[t], {t, 0, 2*Pi}] p[Sin] p[Cos]

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• Get stacktrace from stuck python process

  - by piquadrat

  I have to run a legacy Zope2 website and have some grievance with it. The biggest issue is that, occasionally, it just locks up, running at 100% CPU load and not answering to requests anymore. While the problem isn't reproducible on a regular basis, one page containing 3 dynamic graphs triggers it sometimes, so I suspect some kind of race condition that leads to an endless loop or a stuck busywait. The problem is, I have not yet found a way to debug this thing. There's nothing in the Zope logs and nothing in the system logs. I tried the suggestions from this question to get a stacktrace, but the only signal that has any effect is SIGKILL. Is there another possibility to find out where exactly the process is when it gets stuck?

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• How to use RRDTOOL for one value per day

  - by Octopus

  I have to create a graphical representation for staff salary. The staff is getting there salaries per day and I have there information in below format. This is one month data i.e. 1st March to 31st March <DATE>,<NAME1>,<NAME2>,<NAME3>......<NAME N> YYYY-MM-DD,name1,name2,Name3,.......name4 . . so on.. 1) Is rrdtool a better solution to create graphs and find AVERAGE, MAX, MIN. 2) If yes, How can I use above csv file to create RRD. 3) If no, what else I can use this to automate the graphical information on my website. Any suggestion in perl would be really appreciated.

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• How can I use RRDTOOL to plot values from a CSV file?

  - by Octopus

  I have to create a graphical representation for staff salary. The staff is getting their salaries per day and I have there information in below format. This is one month data i.e. 1st March to 31st March <DATE>,<NAME1>,<NAME2>,<NAME3>......<NAME N> YYYY-MM-DD,name1,name2,Name3,.......name4 . . so on.. 1) Is rrdtool a better solution to create graphs and find AVERAGE, MAX, MIN. 2) If yes, How can I use above CSV file to create RRD. 3) If no, what else I can use this to automate the graphical information on my website. Any suggestion in Perl would be really appreciated.

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• 2d graph in real-time by using opencv and c++

  - by user2758510

  I have a really basic question in opencv and c++. I am trying to graph something in real time by using opencv. I am looking to find a function to draw a graph in rel-time. But still unssuccesful. I need a function that gets two arrays as an input one for x axis and one for y. I tried with this but seems not work in real-time http://www.shervinemami.info/graphs.html I just need to know if there is something available in opencv or not. Thanks in advance.

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• Perl graph garbage collection usage

  - by Kevin

  Hi, I have built a tiny application in Perl that displays a graph over time. It graphs garbage collection usage over time. I use gnuplot to display the actual graph. This works fine if the time period is short, like a few hours. However, as the time increases (say a few days), the graph becomes difficult to read as the information gets crammed. Note that there is a tool called gcviewer which performs a similar function, it works by allowing you to choose the percentage of the graph. http://www.tagtraum.com/gcviewer.html Ideally I would like to take this further by adding the ability to "move" within the graph. I am not a developer but am good at scripting, so if there is some module in Perl which would provide this functionality it would be excellent! However, if it cannot be done in Perl, I am not averse to learning a new technology. Inputs are highly appreciated. Thanks!

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• Why are getters prefixed with the word "get"?

  - by Joey

  Generally speaking, creating a fluid API is something that makes all programmers happy; Both for the creators who write the interface, and the consumers who program against it. Looking beyond conventions, why is it that we prefix all our getters with the word "get". Omitting it usually results in a more fluid, easy to read set of instructions, which ultimately leads to happiness (however small or passive). Consider this very simple example. (pseudo code) Conventional: person = new Person("Joey") person.getName().toLower().print() Alternative: person = new Person("Joey") person.name().toLower().print() Of course this only applies to languages where getters/setters are the norm, but is not directed at any specific language. Were these conventions developed around technical limitations (disambiguation), or simply through the pursuit of a more explicit, intentional feeling type of interface, or perhaps this is just a case of trickle a down norm. What are your thoughts? And how would simple changes to these conventions impact your happiness / daily attitudes towards your craft (however minimal). Thanks.

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• Flash Player 10.1 for Flash Professional CS4 playerglobal.swc?

  - by TheDarkIn1978

  Adobe released projector, debugger and plugin for Flash 10.1 yesterday. on my Mac i've installed the standalone player and debugger in Adobe Flash CS4/Players/ and Adobe Flash CS4/Players/Debug respectively. however, i think i need to download the globalplayer.swc for 10.1 so that Flash CS4 IDE is directed to use the new players. i've searched but i could only find the globalplayer.swc that was released during the 10.1 betas, and i'm not sure if that's the .swc i should use for the final 10.1 release. Adobe's site doesn't mention anything about replacing the .swc to use 10.1 in CS4, so i'm not sure if it's necessary. i've tried creating actionscripts to include flash.ui.Multitouch and flashx.textLayout and neither can be found. i have no idea how to make Flash Professional CS4 use the new APIs available in Flash Player 10.1 suggestions?

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• phing and phpUnderControl ... working together

  - by Paul Hanssen

  Hi, Has anyone got these to work together seemlessly? I have tried, had some success using the plugin at http://phing.info/trac/wiki/Users/Documentation/CruiseControl, but have failed to: Get the metrics graphs working (nothing appears) Enable the "PMD" - project mess detection - reports Are there any other ant-specific commands that must (can) be run in addition to my phing build script? Also, the front page of the reports section dumps a heap of log information, and I'm trying to get rid of that too. Cheers for any help ... we are running phing 2.3.0 and phpUnderControl 0.4.7. Paul

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• htaccess not called when the url point to an existing folder

  - by Eldad

  Hi, I'm running zend server on windows 7. I'm using the htaccess from jooml: Options +FollowSymLinks RewriteEngine On RewriteCond %{QUERY_STRING} mosConfig_[a-zA-Z_]{1,21}(=|\%3D) [OR] RewriteCond %{QUERY_STRING} base64_encode.*\(.*\) [OR] RewriteCond %{QUERY_STRING} (\<|%3C).*script.*(\>|%3E) [NC,OR] RewriteCond %{QUERY_STRING} GLOBALS(=|\[|\%[0-9A-Z]{0,2}) [OR] RewriteCond %{QUERY_STRING} _REQUEST(=|\[|\%[0-9A-Z]{0,2}) RewriteRule ^(.*)$ index.php [F,L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_URI} !^/index.php RewriteCond %{REQUEST_URI} (/|\.php|\.html|\.htm|\.feed|\.pdf|\.raw|/[^.]*)$ [NC] RewriteRule (.*) index.php RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization},L] when I'm calling this url: http://localhost/ABC/ the data is been redirect to index.php but if I'm creating the folder ABC the server is showing the ABC folder content and not redirecting the data back to index.php. how can I prevent that, I want all the calls data to be directed into index.php? Thanks

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• Datacontracts property getter running twice

  - by user321426

  I have a set of data contracts that act as wrappers to base classes that we wish to expose. A quick example is: [DataMember] public List<decimal> Points { get { return sourceObject.ListPoints(); } private set{} } We have some other properties that we have to massage the data first (we are converting object graphs and need to guard against circular references). The issue that we are seeing is that this getter will fire twice, once within the service operation, then again during serialization. This is causing two problems: We manually add to collections, since this is running twice the collections are filled with dupes. If an exception is thrown during the second run, it happens outside of the try/catch in the operation, and does not throw a fault. The service throws a cryptic timeout message, and the only way to see the error is via WCF trace logs.

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• computing "node closure" of graph with removal

  - by Fakrudeen

  Given a directed graph, the goal is to combine the node with the nodes it is pointing to and come up with minimum number of these [lets give the name] super nodes. The catch is once you combine the nodes you can't use those nodes again. [first node as well as all the combined nodes - that is all the members of one super node] The greedy approach would be to pick the node with maximum out degree and combine that node with nodes it is pointing to and remove all of them. Do this every time with the nodes which are not removed yet from graph. The greedy is O(V), but this won't necessarily output minimum number super nodes. So what is the best algorithm to do this?

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• McAfee Virus Scan and Oracle RAC

  - by Lee Gathercole

  Hi, We're experiencing a strange problem with Oracle RAC and McAfee anti-virus. As part of the installation of the Oracle RAC we disable anti virus as directed. We have had our RAC running fine, but when we came to re-enable the AV and reboot we got the BSOD. Abnormal Program Termination (BugCheck, STOP: 0x00000035 (0x8E984678, 0x00000000, 0x00000000, 0x00000000 NO_MORE_IRP_STACK_LOCATIONS Following the standard process of raising this problem with Microsoft they identify the problem and also a fix. Microsoft talk about too many file filter drivers being present and pushing the DFS upper limit beyond the default size. Upping this value, as per msdn, has no impact. We're able to recover from this BSOD by disabling AV. We don't have the problem if we run the AV service manually whilst the system is up. However, if we make the service automatic we fail to boot. Tech Details 2 Node Oracle 10g Cluster 2 * Windows 2003 SP2, 16GB RAM, Quad Core 3ghz Processor SAN attached storage McAfee VirusScan Enterprise 8.5.0i, Scan Engine (5300.2777), DAT Version (5536.0000) Thanks Lee

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• HTML/JavaScript: mouseover effect for image maps?

  - by MVCDummy09

  I'm trying to help out a nonprofit by doing their website. They want (ugh) their logo to serve as an HTML image map. In other words, when you click on different parts of the logo, you're directed to different web pages. They also, however, want mouseover effects: when you mouseover a particular portion of the image map, that piece of the graphic should be highlighted. If the logo was simple, I would slice it up into rectangles and attach mouseover and click events to the appropriate rectangles. With the complexity of their logo, this is not possible, however. Has anyone done anything like this without Flash? I'm not a Flash developer but this is looking like a very difficult task in just HTML/JavaScript. Any ideas? Thanks!

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• How to persist a very abstract data type between sessions: PHP

  - by Greelmo

  I have an abstract data type that behaves much like stack. It represents a history of "graph objects" made by a particular user. Each "graph object" holds one or more "lines", a date range, keys, and a title. Each "line" holds a sql generator configured for a particular subset of data in my db. I would like for these "histories" to be available to users between their sessions. It will be in the form of a tab that reads something like "most recent graphs". What do you believe to be the best way to persist this type of data between sessions. This application could get rather large, so efficiency is a concern. Thanks in advance.

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• Using TortoiseHg’s Repository explorer

  - by krebstar

  I posted this question on superuser.com but I wasn't sure if it was appropriate there.. Anyway: Hi, I'm coming from a TortoiseSVN background and decided to give TortoiseHg a try.. One thing I got really used to with TortoiseSVN was the SVN Repo-Explorer, which worked quite similarly to Windows Explorer.. However, when I tried to use TortoiseHg's Repository Explorer, what I got was something else, it was more like TortoiseSVN's Show Log. It showed me what the recent commits were and what files were changed and even had nifty graphs.. However, I'm still left wanting for TortoiseSVN's Repo-Explorer.. Does TortoiseHg have anything like this? How am I supposed to poke around the Repository if I can only view changed stuff? Thanks, kreb

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• How can I use Perl and RRD to plot ping times?

  - by ChrisMuench

  I'm trying to do my first rrd graph through Perl. I have tried RRD::Simple and rrds and just can't get either one to work. Here's what I have so far: use strict; use RRD::Simple (); # Create an interface object my $rrd = RRD::Simple-new( file = "server.rrd" ); # Put some arbitary data values in the RRD file for the same # 3 data sources called bytesIn, bytesOut and faultsPerSec. $rrd-create( EqSearch = "DERIVE", MfSearch = "DERIVE", EQCostBasis = "DERIVE", MFCostBasis = "DERIVE" ); $rrd-update( EqSearch = 2, MfSearch = 3, EQCostBasis = 10, MFCostBasis = 15 ); # Generate graphs: # /var/tmp/myfile-daily.png, /var/tmp/myfile-weekly.png # /var/tmp/myfile-monthly.png, /var/tmp/myfile-annual.png my %rtn = $rrd-graph( destination = "/Users/cmuench/Documents/Code/perl", title = "Server A", vertical_label = "", interlaced = "", periods = [qw(hour)] );

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• Google Visualization legend format Jquery ui tabs

  - by Liam

  I've got an issue when using the Google Visualization api line chart with Jquery ui tabs. I've got two graphs on two tabs. The first graph, which is visible by default displays fine: the second chart on the hidden tab seems to be messing up the key: I've tried changing the options but nothing I do seems to make any difference. Here are my options: options = { 'title': title, titleTextStyle: { color: color, fontSize: 20 }, 'width': 950, 'height': 400, hAxis: { minorGridlines: { count: x } }, chartArea: { width: 880 }, legend: { position: 'bottom', textStyle: { fontSize: 10 } } }; // Instantiate and draw our chart, passing in some options. var chart = new google.visualization.LineChart(document.getElementById(divId)); chart.draw(data, options); $('#tabs').tabs(); any thoughts on what is causing this and how to prevent it?? Edit If I remove the tabs() call it displays correctly. As per answer below from @Vipul tried setting the div to a fixed width, no difference.

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