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  • How do i implement If statement in Flex/bison

    - by Imran
    Hallo, I need help in flex/bison. Im a beginner in flex/bison, and i hav already looked out these programs and somethings i inderstood, but im learning. My problem is, i want to implement a If-statement via Flex/Bison and i dont know how to start how to do, someone any idea, im very thankful for all your help. here is an example i want to implement: :L1 IF FLAG AND X"0001" EVT 23; ELSE WAIT 500 ms; JMP L1; END IF; how do i implement JMP (jump), when JMP comes it has to jump to the Label L1.

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  • What are your thoughts on Raven DB?

    - by Ronnie Overby
    What are your thoughts on Raven DB? I see this below my title: The question you're asking appears subjective and is likely to be closed. Please don't do that. I think the question is legit because: Raven DB is brand-spanking-new. RDBMS's are probably the de facto for data persistence for .net developers, which Raven DB is not. Given these points, I would like to know your general opinions. Admittedly, the question is sort of broad. That is intentional, because I am trying to learn as much about it as possible, however here are some of my initial concerns and questions: What about using Raven DB for data storage in a shared web hosting environment, since Raven DB is interacted with through HTTP? Are there any areas that Raven DB is particularly well or not well suited for? How does it rank among alternatives, from a .net developer's perspective?

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  • How to group a complex list of objects using LINQ?

    - by Daoming Yang
    I want to select and group the products, and rank them by the number of times they occur. For example, I have an OrderList each of order object has a OrderProductVariantList(OrderLineList), and each of OrderProductVariant object has ProductVariant, and then the ProductVariant object will have a Product object which contains product information. A friend helped me with the following code. It could be compiled, but it did not return any value/result. I used the watch window for the query and it gave me "The name 'query' does not exist in the current context". Can anyone help me? Many thanks. var query = orderList.SelectMany( o => o.OrderLineList ) // results in IEnumerable<OrderProductVariant> .Select( opv => opv.ProductVariant ) .Select( pv => p.Product ) .GroupBy( p => p ) .Select( g => new { Product = g.Key, Count = g.Count() });

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  • My C# and DLL Data Woes

    - by Lynn
    Hey guys, I'm a very beginner C# coder. So, if I get some of the terms incorrect, please be easy on me. I'm trying to see if it is possible to pull data from a DLL. I did some research and found that you can store application resources within a DLL. What I couldn't find, was the information to tell me how to do that. There is a MS article that explains how to access resources within a satellite DLL, but I honestly don't know if that is what I'm looking for. http://msdn.microsoft.com/en-us/library/ms165653.aspx I did try some of the codes involved, but there are some "FileNotFoundExceptions" going on. The rest of the DLL information is showing up: classes, objects, etc. I just added the DLL as a resource in my Visual Studio Project and added it with "using". I just don't know how to get at the meat of it, if it is possible. Thanks, Lynn

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  • Why not to use Array of errors instead of Exception Handling !?

    - by Naughty.Coder
    Why not using array of errors instead of throwing errors and check if it's not empty later in the code.... Exception handling is very confusing to me , I can not understand it's purpose ... can anybody enlighten me !? they compare it with die() as better not to stop the execution of the code , why would I stop the execution of code if I don't want to !? ofcourse I do I'm a beginner programmer , it might be confusing to you as well , or because i'm not very experienced in this ugly thing. Please in the context of PHP only.

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  • updating score in card game

    - by Confused
    I am a total beginner with python. I need help updating the score of a card game. The scoring works as follows: Player A or B has a pair: score += 1 Player A asks Player B (vice versa) for a card and that player has it: score += 1 Player B doesn't have it, Player A has to draw a card. If there is pair after draw: score += 2 I have the logic down but I don't really know how to connect it together. I tried manually adding the scores in my functions, but it get's messy and complicated :( I assume I would have to make a new function for the score and call them in my other functions? I would appreciate the guidance, Thank-you!

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  • why gcc 4.x default reserve 8 bytes for stack on linux when calling a method?

    - by nikcname
    as a beginner of asm, I am checking gcc -S generated asm code to learn. why gcc 4.x default reserve 8 bytes for stack when calling a method? func18 is the empty function with no return no param no local var defined. I can't figure out why 8 bytes is reserved here (neither any forum/site mention for the reason, ppl seems take it for granted) is it for the %ebp just push? or return type?! many thx! .globl _func18 _func18: pushl %ebp movl %esp, %ebp subl $8, %esp .text

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  • why gcc 4.x default reserve 8 bytes for stack on linux when calling a method?

    - by nikcname
    as a beginner of asm, I am checking gcc -S generated asm code to learn. why gcc 4.x default reserve 8 bytes for stack when calling a method? func18 is the empty function with no return no param no local var defined. I can't figure out why 8 bytes is reserved here (neither any forum/site mention for the reason, ppl seems take it for granted) is it for the %ebp just push? or return type?! many thx! .globl _func18 _func18: pushl %ebp movl %esp, %ebp subl $8, %esp .text

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  • python-pam & pam_time module -- possible to check a user without password?

    - by medigeek
    I've looked at the example script of python-pam and linux pam pages, but it's a bit confusing, at least for a beginner in PAM (that I am): http://www.kernel.org/pub/linux/libs/pam/Linux-PAM-html/Linux-PAM_ADG.html http://packages.ubuntu.com/python-pam Is it possible to check if a user has or does not have access to login, without entering password? I would like to create a script that root can use to check if a user is allowed or not to login to the system. If so, can someone post an example that checks if the user is allowed against pam_time? Thanks in advance!

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  • How to retrive only one cell from MySQL table with PHP

    - by JuanCee
    I'm trying to create a forgotten password form that emails users their password. I'm having a problem, though, with the actual password part. You see, I have the email and comparing the email correct, except whenever I send the email I always get either "Your password is ." or "Your password is Array". I'm using: $check_email = mysql_num_rows(mysql_query("SELECT email FROM userRecovery WHERE email = '$to'")); if($check_email == 1){ $qtip = mysql_query("SELECT password FROM userRecovery WHERE email = '$to'"); $theirPassword = mysql_fetch_array($qtip); Rest of the Code... } I used to be able to do this correctly, but I haven't done PHP or MySQL in too long so it's slightly annoying (that, and I'm at a beginner-intermediate kind of level). I remember having this exact problem, but I don't have the code with me to find out what I did. If you think I left out a detail, please say so. Any help if appreciated.

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  • abstract class NumberFormat - very confuse about getInstance()

    - by Alex
    Hi, I'm new to Java and I have a beginner question: NumberFormat is an abstract class and so I assume I can't make an instance of it. But there is a public static (factory?) method getInstance() that allow me to do NumberFormat nf = NumberFormat.getInstance(); I'm quite confuse. I'll be glad if someone could give me hints on: 1) If there is a public method to get an instance of this abstract class, why don't we have also a constructor? 2) This is an abstract class ; how can we have this static method giving us an instance of the class? 3) Why choosing such a design? If I assume it's possible to have an instance of an abstract class (???), I don't get why this class should be abstract at all. Thank you.

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  • Best resource for serious Commodore 64 programming.

    - by postfuturist
    What is the best resource for serious Commodore 64 programming? Assume that serious programming on the Commodore 64 is not done in BASIC V2 that ships with the Commodore 64. I feel like most of the knowledge is tied up in old books and not available on the internet. All that I have found online are either very beginner style introductions to Commodore 64 programming (Hello world), or arcane demo-coder hacks to take advantage of strange parts of the hardware. I haven't found a well-explained list of opcodes, memory locations for system calls, and general mid-level examples and tips. Main portals I have found: lemon64 C-64 Scene Database c64web Actually hosted on a Commodore 64! Tools I have found: cc65 A C compiler that can target Commodore 64.

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  • abstract class NumberFormat - very confused about getInstance()

    - by Alex
    Hi, I'm new to Java and I have a beginner question: NumberFormat is an abstract class and so I assume I can't make an instance of it. But there is a public static (factory?) method getInstance() that allow me to do NumberFormat nf = NumberFormat.getInstance(); I'm quite confuse. I'll be glad if someone could give me hints on: 1) If there is a public method to get an instance of this abstract class, why don't we have also a constructor? 2) This is an abstract class ; how can we have this static method giving us an instance of the class? 3) Why choosing such a design? If I assume it's possible to have an instance of an abstract class (???), I don't get why this class should be abstract at all. Thank you.

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  • how to connect java and mysql using mysql connector java 5.1.12

    - by user225269
    I'm still a beginner in java. I dont have any idea on how to import the files that I have downloaded into my java class. Its in this path: E:\Users\user\Downloads\mysql-connector-java-5.1.12 I don't know what to do with the files I extracted from the file that I have downloaded in the mysql site for me to connect my java application and mysql database. I'm using Netbeans 6.8. And have also installed wampserver. ive already check out This: http://stackoverflow.com/questions/2118369/java-trouble-connecting-to-mysql and this: http://stackoverflow.com/questions/1640910/connecting-to-a-mysql-database But they don't seem to have answers on how to make use of the mysql java connector file from mysql site. Please help, thanks.

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  • Bookmarklet fails in IE8

    - by songdogtech
    Anyone want to take a stab at why this bookmarklet fails in IE8? It turns all text uppercase in Friefox and Safari. But in IE8, it simply stalls with "loading..." I'll admit I'm a beginner with Javascript: javascript:(function(){%20var%20i,t,D=document;for(i=0;t=D.getElementsByTagName ('textarea')[i];++i)t.value=t.value.toUpperCase();%20var%20newSS,styles='* {text-transform:uppercase}input,textarea{text-transform:none}';if(D.createStyleSheet) {D.createStyleSheet(%22javascript:'%22+styles+%22'%22);} else{newSS=D.createElement('link');newSS.rel='stylesheet'; newSS.href='data:text/css,'+escap e(styles);D.documentElement.childNodes[0].appendChild(newSS);}})()

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  • getSelection & surroundContents across multiple tags

    - by lethalbody
    Hi, I've got a script that changes the background colour of text that has been selected. However i'm encountering an issue when the text is selected across multiple elements/tags. The code that i've got is: var text = window.getSelection().getRangeAt(0); var colour = document.createElement("hlight"); colour.style.backgroundColor = "Yellow"; text.surroundContents(colour); And the error being output is: Error: The boundary-points of a range does not meet specific requirements. = NS_ERROR_DOM_RANGE_BAD_BOUNDARYPOINTS_ERR Line: 7 I believe this is to do with the getRange() function though i'm not too sure how to proceed since I am a beginner at javascript. Is there any other way I can replicate what I am trying to achieve? Many thanks.

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  • Perl system call

    - by claferri
    I'm a beginner in Perl and I have some trouble using the "system" call. Here is a little piece of code where I try to execute 2 shell commands : # First command is : # dot -Tpng $dottmpfile > $pngfile # Second command is : # rm $dottmpfile if (!($pngfile eq "")) { my @args = ("dot", "-Tpng", $dottmpfile, " > ", $pngfile); system (join (' ' , @args )) or die "system @args failed : $!"; unlink $dottmpfile; } EDIT : Here is my code now, and I still get an error : system dot -Tpng toto.dot > toto.png failed : Inappropriate ioctl for device at /home/claferri/bin/fractal.pl line 79. I've used this to produce this piece of code.

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  • Cannot use 'javascript' because another language has been specified earlier in this page (or was implied from a CodeFile attribute).

    - by klm9971
    Hello: I have a website in which I am including a javascript file from this link: Code Snippet Page I am getting this error: Microsoft JScript runtime error: Object expected Here is my code: <%@ Page Title="" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="ATP_Assignment.Default" %> <asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" runat="server"> </asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="topArea" runat="server"> <div> <div id="matchUp" class="floatLeft"> <div class="tabTop"> <div class="tabTL"></div> <div class="tabTM"> <font class="title">Player Matchup History</font> </div> <div class="tabTR"></div> </div> <div class="tabMiddle"> <asp:DropDownList ID="ddlPlayer1" runat="server" Height="16px" Width="146px" DataTextField="Name" DataValueField="Id"> </asp:DropDownList> &nbsp;&nbsp;VS&nbsp;&nbsp; <asp:DropDownList ID="ddlPlayer2" runat="server" Height="16px" Width="150px" DataTextField="Name" DataValueField="ID"> </asp:DropDownList> <asp:Button ID="Button1" runat="server" Text="Click" onclick="Button1_Click" /> <br /> Player1: <asp:Label ID="lblPlayer1Score" Value="" runat="server"></asp:Label>&nbsp;&nbsp; Player2: <asp:Label ID="lblPlayer2Score" Value="" runat="server"></asp:Label> </div> <div class="tabBottom"> <div class="tabBL"></div> <div class="tabBM"></div> <div class="tabBR"></div> </div> </div> <div id="favList" class="floatLeft"> <div class="tabTop2"> <div class="tabTL"></div> <div class="tabTM2"> <font class="title">Favorite Player List</font> </div> <div class="tabTR"></div> </div> <div class="tabMiddle2"> Enter Fav JQuery Here!!! </div> <div class="tabBottom2"> <div class="tabBL"></div> <div class="tabBM2"></div> <div class="tabBR"></div> </div> </div> <div class="clearFix">&nbsp;</div> </div> </asp:Content> <asp:Content ID="Content3" ContentPlaceHolderID="contentArea" runat="server"> <div class="padding"> <div> <div id="playerList" class="floatLeft"> <font class="title">Player List</font> <br /> <asp:DataList ID="PlayerList" runat="server"> <ItemTemplate> Name: <asp:Label ID="lblFirstName" runat="server" Text='<%# Eval("FirstName") %>' /> &nbsp; <asp:Label ID="lblLastName" runat="server" Text='<%# Eval("LastName") %>' /> <br /> Rank: <asp:Label ID="lblRank" runat="server" Text='<%# Eval("Rank") %>' /> <br /> Country: <asp:Label ID="lblCountry" runat="server" Text='<%# Eval("Country") %>' /> <br /> <br /> </ItemTemplate> </asp:DataList> </div> <div class="smallPadding">&nbsp;</div> <div id="video"> </div> <div class="clearFix">&nbsp;</div> </div> <div id="tweet"> <font class="title">Recent Tweets</font> <br /> <script type="text/javascript"> alert($ && $.fn ? $.fn.jquery : "jQuery not defined") $(function () { $("#favorites").tweet({ avatar_size: 32, count: 3, username: "atpworldtour", favorites: true, loading_text: "loading list..." }); }); </script> </div> </div> </asp:Content> Where should I put this code: <script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script> <script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.9/jquery-ui.min.js"></script>

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  • Tracking graphics tablet input in C#

    - by Martin
    I'm writing an XNA application with C#, and I want to be able to control the application with a graphics tablet. All I need to be able to do is track the position and pressure of the pen on the tablet, it would be nice to have some built in gesture recognition but I'm willing to build that myself if needed. My first attempt at this was to use the vbtablet library. However, when I sent this to a friend it failed to work. It seems that the underlying technology is quite old and not supported by some tablets. My second attempt is to play with the Microsoft.Ink system. This looks promising, but I know very little about this subject and I'm struggling to make it work properly - for example I can't find how to read the raw tablet input and disable mouse pointer mode on the tablet when using an InkOverlay. What's the best system to use and what good documentation is there for a beginner in this field?

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  • Extending DOMDocument and DOMNode: problem with return object

    - by Glauber Rocha
    I'm trying to extend the DOMDocument class so as to make XPath selections easier. I wrote this piece of code: class myDOMDocument extends DOMDocument { function selectNodes($xpath){ $oxpath = new DOMXPath($this); return $oxpath->query($xpath); } function selectSingleNode($xpath){ return $this->selectNodes($xpath)->item(0); } } These methods return a DOMNodeList and a DOMNode object, respectively. What I'd like to do now is to implement similar methods to the DOMNode objects. But obviously if I write a class (myDOMNode) that extends DOMNode, I won't be able to use these two extra methods on the nodes returned by myDOMDocument because they're DOMNode (and not myDOMNode) objects. I'm rather a beginner in object programming, I've tried various ideas but they all lead to a dead-end. Any hints? Thanks a lot in advance.

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  • Module import error using IDLE

    - by Nimbuz
    I'm an absolute beginner using IDLE (Python 2.6.4) to learn the basics. I recently found a Python program that I want to run but it throws an error although the code looks fine (i.e all modules exist): from css.parse import parse data = """ em { padding: 2px; margin: 1em; border-width: medium; border-style: dashed; line-height: 2.4em; } p { color: red; font-size: 12pt } p:first-letter { color: green; font-size: 200% } p:first-line { color: blue }""" for rule in parse(data): print rule for decl in parse(data)[0]: print decl Error: ImportError: No module named parse How do I fix this? I'm using Snow Leopard. Edit: I guess its a PATH issue, where should I place the modules, which directory?

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  • 500px.com Ranking Algorithm

    - by alex
    I was recently wondering how http://500px.com calculates their "Pulse" rating. The "Pulse" is a score from 1..100 based on the popularity of the photo. I think it might use some of the following criteria: Number of likes Number of "favorites" Number of comments Total views maybe the time since the photo has been uploaded maybe some other non-obvious criteria like the users follower count, user rank, camera model or similar How would I achieve some sort of algorithm like this? Any advice on how to implement an algorithm with this criteria (and maybe some code) would be appreciated too.

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  • Where to find good 3d articles for wpf?

    - by Ankit Rathod
    Hello, I am beginner in WPF. I am basically a Silverlight guy and as i know it doesn't support the full real 3d model of WPF. I am getting interested in learning 3D in WPF. I googled up for WPF and i get very old links which are 3 years old back when WPF was known as Avalon. They may not be of any use in V4.0. Can anybody refer me some links where i can learn WPF 3D from basics? Thanks in advance :)

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  • Nielson's usablity scale

    - by Banderdash
    Just wondering if anyone out there knows of a standard survey (preferably based off Jacob Nielson's work on usability) that web admin's can administer to test groups for usability? I could just make up my own but I feel there as got to be some solid research out there on the sort of judgments on tasks I should be asking. For example Q:: Ask user to find profile page Do I ... A.) Present them with standard likert scale after each question B.) Present them the likert after all the questions .. Then what should that likert be, I know Nielson's usability judgments scale is based on Learnability, Efficiency of Use, Memorability, Error Rate, Satisfaction but I can only imagine a likert I would design that would effectively measure satisfaction...how am I suppose to ask a user to rank the Memorability of a site after one use on a 1-5 scale? Surely someone has devised a good way to pose the question?

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  • Transferring a flat file database to a MySQL database

    - by Jon
    I have a flat file database (yeah gross I know - the worst part is that it's 1.4GB), and I'm in the process of moving it to a MySQL database. The problem is that I'm not sure how to go about doing this - and I've checked through every related question on here but none relate to what I want to do, nor how my database is currently setup. My current flat file database is setup to where a normal MySQL row is its own file, and a MySQL table would be the directory. So for example if you have a user named Jon, there would be a file for the user in a directory named /members/. Within that file would be various information for the user including the users id, rank etc - all separated by tabs, all on separate lines (userid\t4). So here's an example user file: userid 4 notes staff notes: bla bla staff2 notes: bla bla bla username Example So how can I convert the above into their own rows and fields in MySQL? And if possible, could I do thousands of these files at once? Thanks.

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