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  • Tutorials for .NET database app using SQLite

    - by ChrisC
    I have some MS Access experience, and had a class on console c++ apps, now I am trying to develop my first program. It's a little C# db app. I have the db tables and columns planned and keyed into VS, but that's where I'm stuck. I'm needing C#/VS tutorials that will guide me on configuring relationships, datatyping, etc, on the db so I can get it ready for testing of the schema. The only tutorials I've been able to find either talk about general db basics (ie, not helping me with VS/C#), or about C# communications with an existing SQL db. Thank you. (In case it matters, I'm using the open source System.Data.SQLite (sqlite.phxsoftware.com) for the db. I chose it over SQL Server CE after seeing a comparison between the two. Also I wanted a server-less version of SQL because this little app will be on other people's computers and I want to to do as little support as possible.)

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  • Storing and comparing biometric information

    - by Chathuranga Chandrasekara
    I am not sure whether this is the best place to post this. But this is strongly related with programming so decided to put this here. In general we use biometrics in computer applications say for authentication. Lets get 2 examples finger prints and facial recognition. In those cases how we keep the information for comparison. As an example we can't keep a image and process it every time. So what are the methodologies we use to store/determine the similarity in such cases? Are there any special algorithms that designed for that purposes.? (Ex : To return a approximately equal value for a finger print of a certain person every time)

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  • Problem setting output flags for ALU in "Nand to Tetris" course

    - by MahlerFive
    Although I tagged this homework, it is actually for a course which I am doing on my own for free. Anyway, the course is called "From Nand to Tetris" and I'm hoping someone here has seen or taken the course so I can get some help. I am at the stage where I am building the ALU with the supplied hdl language. My problem is that I can't get my chip to compile properly. I am getting errors when I try to set the output flags for the ALU. I believe the problem is that I can't subscript any intermediate variable, since when I just try setting the flags to true or false based on some random variable (say an input flag), I do not get the errors. I know the problem is not with the chips I am trying to use since I am using all builtin chips. Here is my ALU chip so far: /** * The ALU. Computes a pre-defined set of functions out = f(x,y) * where x and y are two 16-bit inputs. The function f is selected * by a set of 6 control bits denoted zx, nx, zy, ny, f, no. * The ALU operation can be described using the following pseudocode: * if zx=1 set x = 0 // 16-bit zero constant * if nx=1 set x = !x // Bit-wise negation * if zy=1 set y = 0 // 16-bit zero constant * if ny=1 set y = !y // Bit-wise negation * if f=1 set out = x + y // Integer 2's complement addition * else set out = x & y // Bit-wise And * if no=1 set out = !out // Bit-wise negation * * In addition to computing out, the ALU computes two 1-bit outputs: * if out=0 set zr = 1 else zr = 0 // 16-bit equality comparison * if out<0 set ng = 1 else ng = 0 // 2's complement comparison */ CHIP ALU { IN // 16-bit inputs: x[16], y[16], // Control bits: zx, // Zero the x input nx, // Negate the x input zy, // Zero the y input ny, // Negate the y input f, // Function code: 1 for add, 0 for and no; // Negate the out output OUT // 16-bit output out[16], // ALU output flags zr, // 1 if out=0, 0 otherwise ng; // 1 if out<0, 0 otherwise PARTS: // Zero the x input Mux16( a=x, b=false, sel=zx, out=x2 ); // Zero the y input Mux16( a=y, b=false, sel=zy, out=y2 ); // Negate the x input Not16( in=x, out=notx ); Mux16( a=x, b=notx, sel=nx, out=x3 ); // Negate the y input Not16( in=y, out=noty ); Mux16( a=y, b=noty, sel=ny, out=y3 ); // Perform f Add16( a=x3, b=y3, out=addout ); And16( a=x3, b=y3, out=andout ); Mux16( a=andout, b=addout, sel=f, out=preout ); // Negate the output Not16( in=preout, out=notpreout ); Mux16( a=preout, b=notpreout, sel=no, out=out ); // zr flag Or8way( in=out[0..7], out=zr1 ); // PROBLEM SHOWS UP HERE Or8way( in=out[8..15], out=zr2 ); Or( a=zr1, b=zr2, out=zr ); // ng flag Not( in=out[15], out=ng ); } So the problem shows up when I am trying to send a subscripted version of 'out' to the Or8Way chip. I've tried using a different variable than 'out', but with the same problem. Then I read that you are not able to subscript intermediate variables. I thought maybe if I sent the intermediate variable to some other chip, and that chip subscripted it, it would solve the problem, but it has the same error. Unfortunately I just can't think of a way to set the zr and ng flags without subscripting some intermediate variable, so I'm really stuck! Just so you know, if I replace the problematic lines with the following, it will compile (but not give the right results since I'm just using some random input): // zr flag Not( in=zx, out=zr ); // ng flag Not( in=zx, out=ng ); Anyone have any ideas? Edit: Here is the appendix of the book for the course which specifies how the hdl works. Specifically look at section 5 which talks about buses and says: "An internal pin (like v above) may not be subscripted". Edit: Here is the exact error I get: "Line 68, Can't connect gate's output pin to part". The error message is sort of confusing though, since that does not seem to be the actual problem. If I just replace "Or8way( in=out[0..7], out=zr1 );" with "Or8way( in=false, out=zr1 );" it will not generate this error, which is what lead me to look up in the appendix and find that the out variable, since it was derived as intermediate, could not be subscripted.

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  • Python vs Ruby Top Sites

    - by Steve
    Hi, I was just trying to find some comparison of the existing python web frameworks and ruby frameworks. There are few promising frameworks in python but I was not able to find a top 100 site using python except for google, which uses python extensively. Python has great frameworks but I am not able to find a really popular sites using python. Definitely most of the site would use python for background processing and stuff. On the other hand, ruby on rails has a few sites like twitter,hulu,yellowpages,scribd are present in top 100 sites. Can you mention some really popular sites using either of these languages.

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  • Manual testing Vs Automated testing

    - by mgj
    Respected all, As many know testing can be mainly classified into manual and automated testing. With regard to this certain questions come to mind. Hope you can help... They include: What is the basic difference between the two types of testing? What are the elements of challenges involved in both manual and automated testing? What are the different skill sets required by a software tester for manual and automated testing respectively? What are the different job prospects and growth opportunities among software testers who do manual testing automated testing respectively? Is manual testing under rated to automated testing in anyway(s)? If yes, kindly specify the way. How differently are the manual testers treated in comparison to automated testers in the corporate world?( If they truly are differentiated in any terms as such ) I hope you can share your knowledge in answering these questions.. Thank you for your time..:)

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  • GNU make copy files to distro directory

    - by TheRoadrunner
    I keep my source html (and images etc.) in separate directories for source control. Part of making the distro is to have make copy files to output folder and set the attributes. Today my makefile shows (extract): %.html: /usr/bin/install -c -p -m 644 $< $@ www: $(HTMLDST)/firmware.html $(HTMLDST)/firmware_status.html $(HTMLDST)/index.html $(HTMLDST)/firmware.html: $(HTMLSRC)/firmware.html $(HTMLDST)/firmware_status.html: $(HTMLSRC)/firmware_status.html $(HTMLDST)/index.html: $(HTMLSRC)/index.html This is shown with only three html files, but in reality, there are lots. I would like to just list the filenames (without paths) and have make do the comparison between source and destination and copy the files that have been updated. Thank you in advance Søren

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  • Novel fitness measure for evolutionary image matching simulation

    - by Nick Johnson
    I'm sure many people have already seen demos of using genetic algorithms to generate an image that matches a sample image. You start off with noise, and gradually it comes to resemble the target image more and more closely, until you have a more-or-less exact duplicate. All of the examples I've seen, however, use a fairly straightforward pixel-by-pixel comparison, resulting in a fairly predictable 'fade in' of the final image. What I'm looking for is something more novel: A fitness measure that comes closer to what we see as 'similar' than the naive approach. I don't have a specific result in mind - I'm just looking for something more 'interesting' than the default. Suggestions?

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  • in TFS can we customize the merge algorithm (conflict resolution)

    - by Jennifer Zouak
    In our case we want to igonore changes in code comment headers for generated code. In Visual Studio, we can change the merge tool (GUI that pops up) and use a 3rd party tool that is able to be customized to ignore changes (http://msdn.microsoft.com/en-us/library/ms181446.aspx). Great, so a file comparison no longer highlights code comments as differences. However when it comes time to checkin, the TFS merge algorith is still prompting us to resolve conflicts. Is there any way to better inform the merge conflict resolution algorithm about which changes are actually important to us? Or can we replace the algorithm or otherwise have it subcontract its work to a 3rd party?

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  • Set Theory and .NET

    - by MasterMax1313
    Recently I came across a situation where set theory and set math fit what I was doing to the letter (granted there was an easier way to accomplish what I needed - i.e. LINQ - but I didn't think of that at the time). However I didn't know of any generic set libraries. Granted IEnumerables provide some set operations (Union, etc.), but nothing like Intersection or set comparison. Can anyone point out something that fits here? Something that implements set math using a generic type?

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  • MacPorts on Snow Leopard: Python install seems to succeed but doesn't install a non-system Python

    - by thebossman
    I've installed Python via MacPorts. According to this question, the files in /opt/local/bin should run the "correct" Python version. However, all those files are symlinks to: /opt/local/Library/Frameworks/Python.framework/Versions/2.6/bin/ Running them directly from that folder (using no symlinks) runs an Apple build of Python! Python 2.6.6 (r266:84292, Jan 6 2011, 13:25:25) [GCC 4.2.1 (Apple Inc. build 5664)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> For comparison, running /usr/bin/python shows a slightly different version: Python 2.6.1 (r261:67515, Jun 24 2010, 21:47:49) [GCC 4.2.1 (Apple Inc. build 5646)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> They're both Apple builds! How do I install the correct version?

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  • Ruby CMS/blog: Mephisto vs. Radiant

    - by Candidasa
    I'm looking for a blogging tool with some light CMS features in Ruby on Rails. I mainly want something simple, but configurable. I have no need for page snippets, etc. Just your basic main blog, very good (and easy) theme support, some nice sidebar stuff, a few static pages and MetaWeblog API support. I'm thinking of either using Mephisto or Radiant CMS (everything else seems half-baked or extremely lightweight at best): http://mephistoblog.com/ http://www.radiantcms.org/ Documentation for Mephisto seems very lacking and their site is a mess. I've also read some bad things about it's stability. Radiant seems more stable in comparison and has heaps of useful plug-ins. However, it isn't designed for blogging out of the box. That has to be added as almost an after thought. Creating a custom theme also seems more cumbersome with Radiant due to the sub-page/snippet feature. Which should I choose?

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  • How to compare sqlite TIMESTAMP values

    - by Roel
    I have an Sqlite database in which I want to select rows of which the value in a TIMESTAMP column is before a certain date. I would think this to be simple but I can't get it done. I have tried this: SELECT * FROM logged_event WHERE logged_event.CREATED_AT < '2010-05-28 16:20:55' and various variations on it, like with the date functions. I've read http://sqlite.org/lang_datefunc.html and http://www.sqlite.org/datatypes.html and I would expect that the column would be a numeric type, and that the comparison would be done on the unix timestamp value. Apparantly not. Anyone who can help? If it matters, I'm trying this out in Sqlite Expert Personal.

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  • Safari wrapping too early

    - by the Hampster
    I've created a class web page with a page for midterm review. It uses jsMath to turn Tex into nice math. (MathML looks awful) Anyway, I would occasionally like to have several problems per line. Each problem is in its own <span>, so if it needs to wrap, it won't split the problem. It all seems to work, except that Safari for the Mac seems overly anxious to wrap, sometimes wrapping at 30% paragraph width. Even under inspection, it reports a width of 663px, but wrapping occurs at around 150px. There is no padding. Firefox renders just fine. A comparison is here: http://davehampson.net/Images/Safaribug.png Sometimes Safari works just fine. The original web page is here: http://math.davehampson.net/index3.php (study guide 2) I don't know if this is a bug in safari, or if there is some odd/subtle css point I am missing. Any help would be appreciated. --Dave

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  • Are jQuery and GWT comparable frameworks?

    - by lomaxx
    At work there's a bit of discussion around what client side framework we should use for our front end web applications. Currently it's a showdown between GWT and jQuery and I'm kind of on the fence but leaning towards jQuery. From what I can tell, GWT and jQuery are trying to solve different problems but are compared to each other because they both end up existing in the web applications space. I suspect that if this is the case, then comparing the two may be fruitless so what I'm trying to get my head around is if comparing jQuery to GWT is even an apples to apples comparison in the same way that jQuery and ExtJS can be compared, or would it be more beneficial for our team to ask certain questions of our application and use the answers to determine which framework is a better fit for us?

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  • Comparing datafeeds from different networks (Affiliate Marketing)

    - by Logistetica
    Hi, I am working on integrating affiliate sales into few existing sites. We are using a few merchants who work via different networks (cj, shareasale, linkshare, avantlink). Now my observation is that all these networks provide data feeds in different formats. But that's not a big problem. My main concern is actually merchants using different titles on same products. I don't want to run into these situations: a) two listings of the SAME product from N merchants (if titles are just a bit different) b) one listing of N different products from merchants (if we don't use strict comparison algorithm) We want to automate everything as much as possible, want to avoid operators scanning listings under question all the time. How is this problem typically handled?

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  • Capture ASP output for monitoring

    - by scourge.zero
    How do I Capture ASP.NET output and then store it as temp memory so that I can use them in an application to do comparison. example. there's this site which has ASP output. Sorry I do not have server access, what I can do is view the output. The site by the way is a monitor for all users logged in and in which ever channel. output e.g. Channel 1 Username logged in (0 / 1) Username 1 1 John Smith 1 George B 0 Channel 2 Username logged in (0 / 1) Username 1 1 John Smith 0 George B 0 what I wanted to do is to capture this output and then show them this way. Username Channel 1 Channel 2 Total Username 1 1 1 2 John Smith 1 0 1 George B 0 0 0 I dont knw where to start.

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  • Rank Source Control Optionsl-VSS vs CVS vs none vs your own hell

    - by Roman A. Taycher
    It seems like a lit of people here and on many programmer wikis/blogs/ect. elsewhere really dislike VSS. A lot of people also have a serious dislike for cvs. In many places I have heard a lot of differing opinions on whether or not using vss or cvs is better or worse then using no source control, please rate the worst and explain why!!!!! you rated them this way. Feel free to throw in your own horrible system in the rankings. If you feel it depends on the circumstances try to explain the some of the different scenarios which lead to different rankings. (note:I see a lot of discussion of what is better but little of what is worse.) second note: while both answers are nice I'm looking less for good replacements and more for a comparison of which is worse and more importantly why!!!!!

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  • PHP Email Form Sending Random Text

    - by Doug
    Hi, I did a webpage for a client that involved a series of text boxes asking for specific information such as a person's name, e-mail address, company, etc. Along with a button that would e-mail the information to my client. Whenever I tested the button it seemed to work perfectly, I uploaded the page and thought I was done. But, the other day my client got this email from the site: Name: rfhopzdgmx rfhopzdgmx Email: [email protected] Company: zUDXatAfoDvQrdH Mailing Address: AaSsXklqpHIsoCNcei gXsimMPRBYZqq vGLvZraZNdpOAV, ChsmuibE PoKzaSCubXPRI Home Phone: CIJbIfjMfjIaTqAlD Work Phone: JFLZBOvru Cell Phone: XlFJTTFGiTTiiFQfy Fax: UEJMOVZodWPkKxew Comments: sPvSCE hgetwoguderu,* [url=http://atyktjlxcznl.com/]atyktjlxcznl[/url], [link=http://nudvfcehwpyg.com/]nudvfcehwpyg[/link], http://lvvwkbzbhnzp.com/ Note: The * line contained HTML link code, I just don't know how to get this site to show it. Here is the PHP code in the site for the e-mail button. <?php //This Sends A Formatted Text Email Using The Text Boxes if ($_POST['submit']){ //This Gets The Form Data $fname = $_POST['fName']; $lname = $_POST['lName']; $email = $_POST['email']; $company = $_POST['co']; $address1 = $_POST['address1']; $address2 = $_POST['address2']; $city = $_POST['city']; $state = $_POST['state']; $zip = $_POST['zip']; $homep = $_POST['homeP']; $workp = $_POST['workP']; $cellp = $_POST['cellP']; $fax = $_POST['fax']; $comments = $_POST['txaOutputField']; //echo "<script language = 'javascript'>alert('YAY');</script>"; if ($fname && $lname && $email && $comments){ //Check If Required Fields Are Filled //This Sets The SMTP Configuration In php.ini ini_set("SMTP", "smtp.2ndsourcewire.com"); //This Replaces Any Blank Fields With 'None's if ($company == ""){ $company = "None"; } if ($address1 == ""){ $address1 = "None"; } if ($city == ""){ $city = "None"; } if ($state == ""){ $state = "None"; } if ($zip == ""){ $zip = "None"; } if ($homep == ""){ $homep = "None"; } if ($workp == ""){ $workp = "None"; } if ($cellp == ""){ $cellp = "None"; } if ($fax == ""){ $fax = "None"; } //This Creates The Variables Necessary For The Email $to = "CLIENT EMAIL WHICH I'M CENSORING"; $subject = "Email from 2ndSourceWire.com"; $from = "From: [email protected]"; $secondEmail = "MY EMAIL WHICH I'M ALSO CENSORING"; if ($address2 == ""){ $body = "Name: $fname $lname\n". "Email: $email\n". "Company: $company\n\n". "Mailing Address:\n". "$address1\n". "$city, $state $zip\n\n". "Home Phone: $homep\n". "Work Phone: $workp\n". "Cell Phone: $cellp\n". "Fax: $fax\n\n". "Comments:\n". "$comments"; } else { $body = "Name: $fname $lname\n". "Email: $email\n". "Company: $company\n\n". "Mailing Address:\n". "$address1\n". "$address2\n". "$city, $state $zip\n\n". "Home Phone: $homep\n". "Work Phone: $workp\n". "Cell Phone: $cellp\n". "Fax: $fax\n\n". "Comments:\n". "$comments"; } //This Sends The Email mail($to, $subject, $body, $from); mail($secondEmail, $subject, $body, $from); echo "<script language = 'javascript'>alert('The email was sent successfully.');</script>"; } else { //The Required Fields Are Not Filled echo "<script language = 'javascript'>alert('Please fill your first name, last name, email address, and your comment or question.');</script>"; } } ? I'm a little dumbfounded on how this happened, the client mentioned a couple e-mails of this, so I don't think it is a random glitch. Also, the e-mail address was formatted like an e-mail address, so someone or some program was interpreting the labels next to each text box. I also noticed that the first and last names entered are the same word, even though they were in different text boxes, I'm thinking its some spam program, but wouldn't they try to advertise something and make money, rather than just spouting out random text? Also, the comments section makes no sense to me at all, the links goto nowhere and they're all perfectly formatted, a random person just screwing around wouldn't know those tags, and a programmer doing it wouldn't bother with it, but also neither would a program. I have no idea what caused this or how to fix it, I'm drawing a blank here. Anyone have any ideas?

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  • graphics don't draw when loop condition is dates. c#, winForms

    - by jello
    so i got this piece of code. (currPosX is defined earlier) while (earliestDate < DateTime.Today) { currPosX = currPosX + 5; e.Graphics.DrawLine(Pens.Black, currPosX, 0, currPosX, 10); earliestDate = earliestDate.AddDays(1); } the graphics don't draw. it's really weird, since this only happens when the condition statement is a date comparison. I debugged, and it does go in the loop, and the values are messed with (currPosX for example). But, no display. one more weirdness, if I add a MessageBox.Show("blabla") in the loop, the message box pops up, and graphics are drawn. what's going on here?

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  • Warning when using qsort in C

    - by controlfreak123
    I wrote my comparison function int cmp(const int * a,const int * b) { if (*a==*b) return 0; else if (*a < *b) return -1; else return 1; } and i have my declaration int cmp (const int * value1,const int * value2); and I'm calling qsort in my program like so qsort(currentCases,round,sizeof(int),cmp); when i compile it I get the following warning warning: passing argument 4 of ‘qsort’ from incompatible pointer type /usr/include/stdlib.h:710: note: expected ‘__compar_fn_t’ but argument is of type ‘int (*)(const int *, const int *)’ The program works just fine so my only concern is why it doesn't like the way im using that?

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  • Custom Sorting on Custom Field in Django

    - by RotaJota
    In my app, I have defined a custom field to represent a physical quantity using the quantities package. class AmountField(models.CharField): def __init__(self, *args, **kwargs): ... def to_python(self, value): create_quantities_value(value) Essentially the way it works is it extends CharField to store the value as a string in the database "12 min" and represents it as a quantities object when using the field in a model array(12) * min Then in a model it is used as such: class MyModel(models.Model): group = models.CharField() amount = AmountField() class Meta: ordering = ['group', 'amount'] My issue is that these fields do not seem to sort by the quantity, but instead by the string. So if I have some objects that contain something like {"group":"A", "amount":"12 min"} {"group":"A", "amount":"20 min"} {"group":"A", "amount":"2 min"} {"group":"B", "amount":"20 min"} {"group":"B", "amount":"1 hr"} they end up sorted something like this: >>> MyModel.objects.all() [{A, 12 min}, {A, 2 min}, {A, 20 min}, {B, 1 hr}, {B, 20 min}] essentially alphabetical order. Can I give my custom AmountField a comparison function so that it will compare by the python value instead of the DB value?

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  • How to make an NSOutlineView indent multiple columns?

    - by Rinzwind
    What would be the easiest or recommended way for making an NSOutlineView indent multiple columns? By default, it only indents the outline column; and as far as I know there is no built-in support for making it indent other columns. I have an NSOutlineView which shows a comparison between two sets of hierarchical data. For visual appeal, if some item in the outline column is indented, I'd like to indent the item on the same row in another column by the same indentation amount. (There's also a third column which shows the result of comparing the two items, this column should never be indented.) Can this only be achieved by subclassing NSOutlineView? And what would need to be overridden in the subclass? Or is there an easier way to get it to indent multiple columns?

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  • How to convert a plist file from mac os project to iphone project?

    - by Tom Pace
    I am developing an app for the iPhone OS devices, and am using a third-party engine which is not well documented but I've made great progress with it anyway. The problem: The engine's developer strongly urges extending from the existing template projects bundled with the engine, but the engine's plist files are Mac OSX project plist files. This is an iPhone engine, and so I cannot understand why the plist file is structured to take keys for Mac OS apps, but that's how it is. I did a FileMerge comparison to ensure there was nothing within the file itself that defined its use for one OS or the other, so I guess it's defined somewhere in the project settings.

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  • How to differentiate new items from existing items in SharePoint workflow

    - by Jim Hoerber
    I have a SPD workflow that is set to run when an item changes but it keeps getting triggered on new items, which is pretty annoying. I'm looking into why this is happening but I'm also looking for a way to terminate the workflow if the item is new as a temporary workaround. I tried to compare the Created field to the Modified field i.e. if Created and Modified are the same then don't run. This didn't work, either as a date or string comparison. Any suggestions would be much appreciated.

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  • Nonstandard SSIS lookup

    - by Stefan
    I have a situation where I am trying to lookup a value in one table based on values in another table, using a BETWEEN operator and not an = operator. In one table, I have a value "EffectiveDate". I want to get a Weight number from another table, but the other table has two fields: "Inception" and "Termination". What I want to do is extract the Weight from that table for use where the EffectiveDate is between Inception and Termination. SSIS doesn't seem to provide a way to do this. It's good at matching one column to another column, but doesn't seem to allow one to many-column comparison/operations. Am I missing anything? Is this possible to do somehow?

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