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• Algorithm for non-contiguous netmask match

  - by Gianluca

  Hi, I have to write a really really fast algorithm to match an IP address to a list of groups, where each group is defined using a notation like 192.168.0.0/252.255.0.255. As you can see, the bitmask can contain zeros even in the middle, so the traditional "longest prefix match" algorithms won't work. If an IP matches two groups, it will be assigned to the group containing most 1's in the netmask. I'm not working with many entries (let's say < 1000) and I don't want to use a data structure requiring a large memory footprint (let's say 1-2 MB), but it really has to be fast (of course I can't afford a linear search). Do you have any suggestion? Thanks guys. UPDATE: I found something quite interesting at http://www.cse.usf.edu/~ligatti/papers/grouper-conf.pdf, but it's still too memory-hungry for my utopic use case

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• Finding the best jquery plugins

  - by Lan

  Is there a resource for finding the "best" jquery plugins, or at least just the most used ones? For example, I wanted to find a menu jquery plugin but when I goto the jquery website there are so many to look through and I don't see a way to see how popular each one is. For ruby there's the http://ruby-toolbox.com/ which lists many plugins, how popular they are, info about them, etc. Is there something similar or at least some way to filter through all the jquery plugins? EDIT 1: To shed some more light on this - the "most popular" link on the jquery page is useless. I can't find a way to search through it but even worse, the ratings don't seem to mean much. Ex - the first item, in other words the most popular plugin in that list has 5 stars and TWO votes. Doesn't seem like a very reliable resource to me.

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• header correct, but identifier not found

  - by sciloop

  I`m having two projects (x64). A. written in C (wxWidgets) B. written in c++ A compiles fine. B uses funcions of A. When I try to compile, I`m getting several errors. I suggest that the reason for the errors is the same for all, so I mention only the first: It says: strlen: identifier not found. But I have included the headers: #include <stdio.h> #include <string.h> So, currently, I have just no idea where to start to search for the reason of the errors. May it be that I have c and c++ files? May it be that I compile for x64? Thanks for help!

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• Question about the lifecycle of a simple Android application

  - by jul

  Hi, I've got a simple application with 3 activities: -the first contains a search box which calls a web service and show the results (restaurants) below in a listview -when a restaurant is clicked another activity is started showing the description of the restaurant and a button "show map" -when the button "show map" is clicked, guess what, the map is shown in a third activity. All the data is loaded in the first activity by a web service (restaurant descriptions and coordinates), and data required by each activity is passed in a bundle using "intent.putExtra". Now everything seems to run smoothly when clicking on the back button (eg. clicking on the back button from the map resumes the "restaurant description" activity with all data set properly), while I haven't done anything about the lifecycle yet. Why? Are all variables saved automatically? Should I use onSaveInstanceState() and onRestoreInstanceState() anyway? Thanks Jul

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• Sharepoint 2010 - AAM - SPSite(SPContext.Current.Site.ID) RootWeb.Url is from wrong zone

  - by user2026343

  I have a sharepoint 2010 web application with 2 different zones, default zone with windows login (for search crawl), internet with Claims (FBA) for users to login. I have custom webparts that uses using (SPSite mySite = new SPSite(SPContext.Current.Site.ID)) using (SPWeb web = mySite.RootWeb) { string url = web.Url I use this url to include to emails etc... Problem is: when user connects to FBA (extended zone), and goes to the webpart,string url in my code returns the url of the default zone(windows auth) where user should not be touching. I have different host headers for these zones, any help would be very appreciated. Update: fixed it with using (SPSite newsite =new SPSite(SPContext.Current.Site.ID,SPContext.Current.Site.Zone)) using (SPWeb web = newsite.RootWeb) { //do your implementation here }

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• Question about mysql indexes on low to medium cardinality columns

  - by Kevin J

  I have a general question about the way that database indexing works, particularly in mysql. Let's say I have a table with a million rows with a column "ClientID" that is distributed relatively equally among 30 values. Thus, this column is very low cardinality (30) relative to the primary key (1 million). Now, I understand that you shouldn't create indexes on low cardinality fields. However, in this case, queries are only ever done with one of the 30 clientIDs. Thus, wouldn't creating an index on ClientID be helpful, as the search space is automatically reduced to 1/30th what it normally would be? Or is my understanding of how the index works flawed? Thanks

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• How would I order a table by the number of matching params in the where clause of an sql statement?

  - by Eitan

  I'm writing sql to search a database by a number of parameters. How would I go about ordering the result set by the items that match the most parameters in the where clause. For example: SELECT * FROM users WHERE username = 'eitan' OR email = '[email protected]' OR company = 'eitan' Username | email | company 1) eitan | [email protected] | blah 2) eitan | [email protected] | eitan 3) eitan | [email protected] | blah should be ordered like: 2, 3, 1. Thanks. (ps the query isn't that easy, has a lot of joins and a lot of OR's in the WHERE) Eitan

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• How can i determine the version of the Windows SDK installed on my computer?

  - by NuclearCheese781

  Hello everyone :) I've very recently decided to teach myself c++ and win32 programming after learning vb.net, and i've got a very simple question: How can I determine what version of the Windows SDK is installed on my computer? I'm asking so I can install the latest version if it isn't installed allready, before i start playing around with c++. I'm using Microsoft Visual Studio 2008 SP1 as my IDE. (I spent 10 minutes using Google to search for an answer, but I couldn't find one) If anyone could help me, it would be very much appreciated. Matt.

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• Beginner Java Question about Integer.parseInt() and casting

  - by happysoul

  so when casting like in the statement below :- int randomNumber=(int) (Math.random()*5) it causes the random no. generated to get converted into an int.. Also there's this method I just came across Integer.parseInt() which does the same ! i.e return an integer Why two different ways to make a value an int ? Also I made a search and it says parseInt() takes string as an argument.. So does this mean that parseInt() is ONLY to convert String into integer ? What about this casting then (int) ?? Can we use this to convert a string to an int too ? sorry if it sounds like a dumb question..I am just confused and trying to understand Help ?

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• How can I try a new language or framework without installing it?

  - by flamingLogos

  With so many languages and frameworks that exist, and with new ones appearing all the time, I don't have the time to download, install, and configure each one to evaluate it. In the past I've run across webapps that allow one to write or paste code into a window, and see the results in realtime in the browser, usually in a tutorial setting. What are your favorite sandbox sites for a given technology? Edit: @fretj provided the link to the excellent Google Code Playground (+1 upvote), but I thought that it was just for experimenting with Google's own apps (Search, Maps, Earth, Language, etc). But it turns out that it contains a few hidden gems: In addition to their apps, you can try out the many Javascript libraries that they host including jQuery, jQuery UI, MooTools, Dojo, and Prototype Scriptaculous. They're all hidden under the Libraries category in the "Pick an API" box. I overlooked the category because I thought it was for an app called Google Libraries. There's also a Javascript category for Javascript itself.

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• Why shouldn't I use Flash?

  - by acidzombie24

  I heard many times i should avoid flash for my website. Yet no one has told me a good reason. I searched for reasons and i see many that are not true (such as text in flash are not indexable by search engines) or may not necessarily be true or significant enough (eating more bandwidth. Would a JS equivalent be bigger or smaller?). My site uses flash to playback sound (m4a). I dont have to worry about indexing, the back button not working, etc. But i have feeling there may be other reasons. What are reasons i shouldnt use flash on my website. I'll note one, the fact iphone/itouch and mobile devices does not support it. Not a big deal for most sites and is obvious. What are reason to avoid flash on my site?

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• speed up the speed of a sql query to mysql?

  - by fayer

  in my mysql database i've got the geonames database, containing all countries, states and cities. i am using this to create a cascading menu so the user could select where he is from: country - state - county - city. but the main problem is that the query will search through all the 7 millions rows in that table each time i want to get the list of children rows, and that is taking a while 10-15 seconds. i wonder how i could speed this up: caching? table views? reorganizing table structure somehow? and most important, how do i do these things? are there good tutorials you could link to me? i appreciate all help and feedback discussing smart ways of handling this issue!

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• What Kind of Knowledge is Necessary For a Permon Who Does Not Have IT Background? [closed]

  - by skyflyer

  One of my colleagues joined our company, which by the way is a internet company, months ago as an on-line marketing specialist. He majored English in his college and has never deeply touched IT before. He says that to be a good on-line marketing specialist he needs to lean some basic IT skills in order to deliver superb work. According to him, things like Search Engine Optimization, monitoring competitors' web sites, design some functionality on web site and so on require IT entree-level knowledge. And he asks me what kind knowledge is helpful for him to do his job. I am stunted by his question. It is easy enough to answer, things like HTML, CSS, even Photo-shop are required in some job descriptions. Also, I believe some basic understanding of dynamic web site, static web site is helpful to him. On the other hand, as a techie I still feel my answer is awkward. What is your opinion on this? Always lot of thanks to you guys on SO.

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• JS dynamic img change and SEO

  - by Gusepo

  Hi all, I've built a web site using jquery to make nice transitions between content. The code works this way: there are 2 imgs (body and footer) when I click on a link (instead of going to another page) I fade out the 2 imgs and change the src attribute of the 2. When the new imgs are loaded I fade them back in. I'm using SWFaddress to allow user go directly to internal content. Now I'd like to make my content indexed by google and other Search engines, all the text content is inside the imgs, So I've got the text in ALT attribute. My question is: if a dinamically change the imgs ALT attribute using JS, will spiders be able to read it properly? consider that I'm using SWFaddress to create a sitemap.. Thanks

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• MS Access antiquated? Anything new in 2011?

  - by Heidi

  Our company has a database of 17,000 entries. We have used MS Access for over 10 years for our various mailings. Is there something new and better out there? I'm not a techie, so keep in mind when answering. Our problems with Access are: -no record of what was deleted, -will not turn up a name in a search if cap's or punctuation is not entered exactly, -is complicated for us to understand the de-duping process. - We'd like a more nimble program that we can access from more than one dedicated computer.

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• How to detect VC++ 2008 redistributable?

  - by RobH

  Is there a Registry setting that I can look for to determine whether or not the Visual C++ redistributable is installed, whether standalone or as part of Visual Studio 2008? I know that I could launch the VC++ 2008 redistributable installer and let it handle the detection, but it would look cleaner if I can check for it and not bother launching the installer if the redistributable is already on the system. It's no biggie if there is no setting to search for, as this is just for the preliminary installers that we have for the new version of our software. We won't need it for the new Windows Installer-based installers that we are working on that will replace the old tech ones and will use the merge modules.

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• Games that are still winable against the computer?

  - by roygbiv

  There's a game on my laptop called 'Chess Titans' which I've been playing one game a day for almost 90 days. With the difficulty on the hardest setting I have not been able to win one game, however, I have come close. What's the fun in playing a chess game if the computer can search all moves and win? Has (or can) anyone beat a modern computer chess AI? What games can't a computer gain an advantage in? (i.e. They would be 'fun' to play.)

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• How can I convert German characters during XML read and PHP write into mysql?

  - by kitenski

  Morning, I am inputting data from an XML file into my database, but have any isse with German words (that are in the XML by mistake) For example the word für appears in my XML as für and thus appears the same in my database. I know I could do a simple search/replace for that exact phrase, but I was wondering if there was a smarter way to do it as I can't predict if any other German words may one day appear in the XML? ADDING SOME MORE DETAIL The XML source says: and in my PHP I have $domString = utf8_encode($dom-saveXML($element)); If I look into the XML file before I start reading it, it has - <title> - <![CDATA[ CoPilot Live v8 Europa für Android 8.0.0.644 ]]> </title> Thanks. Greg

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• How do i serlialize the product using php?

  - by Ibrahim Azhar Armar

  hi, i am building a real estate application where in it will store the properties and search it. the property will have different categories like (residential, commercial, industrial or agricultural). based upon the category i want to serailize each and every property listing . for example the property with id 1 belongs to resedential will have the serial code rs_SOMERANDOMUNIQUENUMBER. and for commercial it can be cm_SOMERANDOMUNIQUENUMBER and so on. for this my database table looks like this. CREATE TABLE IF NOT EXISTS `propSerials` ( `id` bigint(20) NOT NULL auto_increment, `serial` varchar(50) NOT NULL, `property_id` int(10) UNIQUE NOT NULL, PRIMARY KEY  (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; what would be the best possible format to store the serial with the prefix according to category? thank you

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• Eclipse - Galileo IDE force save of changed files before build?

  - by the empirical programmer

  Hi, When I used previous versions of Eclipse (e.g. Ganymede/Europa) if I had edited a file and then attempted a build Eclipse would prompt me to save first. Since I updated to Galileo (Build id: 20090920-1017 & just checked for updates) when I build I'm not prompted to save first. Perhaps the dialog had a checkbox for "don't tell me again" which I mistakenly checked on??? I figure it is just a preference setting some where but I can't seem to find it, search in Preferences for 'save' and for 'build' but did not find it. I tried "Save automatically before build" but that actually did not work for me, and isn't really what I was looking for anyways. Any ideas? thanks. Edit: I'm actually using an Ant script to 'build' (right click on script and Run As...Ant Build). So perhaps my original wording was a bit off base since I did not state how I was building.

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• How to print element values when iterating through XML document in PHP

  - by pharma_joe

  I am iterating through the results of a service call to yahoo news thus: //Send service request if (!$yahooResults = file_get_contents($yahooRequest)) { echo 'Error processing service request'; } //Read result into xml document $yahooResultXml = new DOMDocument('1.0', 'UTF-8'); $yahooResultXml-loadXML($yahooResults); //Build page include_once('components/pageHeader.php'); echo 'Search Results'; //echo $yahooResultXml-saveHTML(); //Iterate over each Result node $stories = $yahooResultXml-getElementsByTagName('Result'); foreach ($stories as $story) { //Title //Summary //Url //Source //Language //Publish Date //Modification Date } include_once('components/pageFooter.php'); Each Title is in a Title node within a Result Node. I cannot figure out how to simply echo the content of the Title node!

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• How to populate gridview on button_click after searching from access database?

  - by Usman

  I am creating a form in c#.net . I want to populate the gridview only on button click with entries meeting search criteria. I have tried but on searching ID it works but on searching FirstName it gives error plz check SQL also. My Code behind private void button1_Click(object sender, EventArgs e) { try { string strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=L:/New project/Project/Project/Data.accdb"; string sql = "SELECT * FROM AddressBook WHERE FirstName='" + textBox1.Text.ToString(); OleDbConnection connection = new OleDbConnection(strConn); OleDbDataAdapter dataadapter = new OleDbDataAdapter(sql, connection); DataSet ds = new DataSet(); connection.Open(); dataadapter.Fill(ds, "AddressBook"); connection.Close(); dataGridView1.DataSource = ds; dataGridView1.DataMember = "AddressBook"; } catch (System.Exception err) { this.label27.Visible = true; this.label27.Text = err.Message.ToString(); } }

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• How can I change the filename of a shared library after building a program that depends on it?

  - by ZorbaTHut

  I have a program that depends on a shared library it expects to find deep inside a directory structure. I'd like to move that shared library out and into a better place. On OS X, this can be done with install_name_tool. I'm unable to find an equivalent for Linux. For reference, readelf -d myprogram spits out the following paraphrased output: Dynamic section at offset 0x1e9ed4 contains 30 entries: Tag Type Name/Value 0x00000001 (NEEDED) Shared library: [this/is/terrible/library.so] 0x00000001 (NEEDED) Shared library: [libGL.so.1] 0x00000001 (NEEDED) Shared library: [libGLU.so.1] 0x00000001 (NEEDED) Shared library: [libstdc++.so.6] and I would like to errata "this/is/terrible/library.so" to be "shared/library.so". I know about RPATH and it isn't what I'm looking for, I don't need to change search paths globally.

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• Suggestions on how to track tag count for a particular object

  - by Robin Fisher

  Hi, I'm looking for suggestions on how to track the number of tags associated with a particular object in Rails. I'm using acts_as_taggable_on and it's working fine. What I would like to be able to do is search for all objects that have no tags, preferably through a scope i.e. Object.untagged.all My first thought was to use an after_save callback to update an attribute called "taggings_count" in my model: def update_taggings_count self.taggings_count = self.tag_list.size self.save end Unfortunately, this does the obvious thing of putting me in an infinite loop. I need to use an after_save callback because the tag_list is not updated until the main object is saved. Would appreciate any suggestions as I'm on the verge of rolling my own tagging system. Regards Robin

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• Problem in passing arrays from C# to C++

  - by Rakesh K

  Hi, I have an application in which I need to pass an array from C# to a C++ DLL. What is the best method to do it? I did some search on Internet and figured out that I need to pass the arrays from C# using ref. The code for the same: status = IterateCL(ref input, ref output); The input and output arrays are of length 20. and the corresponding code in C++ DLL is IterateCL(int *&inArray, int *&outArray) This works fine for once. But if I try to call the function from C# in a loop the second time, the input array in C# is showing up as an array of one element. Why is this happening and please help me how I can call this function iteratively from C#. Thanks, Rakesh.

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