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• Regularly update database without browser/user

  - by Chris M

  I currently have a MySQL database which I was hoping to use to store regularly updated data from a temperature sensor connected to the internet. I currently have a page that, when opened, will grab the current temperature and the current timestamp and add it as an entry to the database, but I was looking for a way to do that without me refreshing the page every 5 seconds. Detail: The data comes from an Arduino Ethernet, posted to an IP address. Currently, I'm using cURL to grab the data from the IP, add a timestamp and save it to the DB. Obviously only updates when the page is refreshed (it uses PHP). Here is a live feed of the data - http://wetdreams.org.uk/ChrisProject/UI/live_graph_two.html TL;DR - Basically I need a middle man to grab the data from the IP and post it to a MySQL Edit: Thanks for all the advice. There might be a little bit of confusion, I'm looking for a solution that (ideally) doesn't require a computer to be on at all (other than the Server containing Database). Since I'm looking to store data over long periods of time (weeks), I'd like to set it up and leave a script running on the server (or Arduino) that gets the temp and posts it to the Database. In my head I would like to have a page on the server that automatically (without any browser open, or any other prompting other than a timer) calls a PHP script. Hope that clears things up!

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• C program - Seg fault, cause of

  - by resonant_fractal

  Running this gives me a seg fault (gcc filename.c -lm), when i enter 6 (int) as a value. Please help me get my head around this. The intended functionality has not yet been implemented, but I need to know why I'm headed into seg faults already. Thanks! #include<stdio.h> #include<math.h> int main (void) { int l = 5; int n, i, tmp, index; char * s[] = {"Sheldon", "Leonard", "Penny", "Raj", "Howard"}; scanf("%d", &n); //Solve Sigma(Ai*2^(i-1)) = (n - k)/l if (n/l <= 1) printf("%s\n", s[n-1]); else { tmp = n; for (i = 1;;) { tmp = tmp - (l * pow(2,i-1)); if (tmp <= 5) { // printf("Breaking\n"); break; } ++i; } printf("Last index = %d\n", i); // ***NOTE*** //Value lies in next array, therefore ++i; index = tmp + pow(2, n-1); printf("%d\n", index); } return 0; }

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• How to use Many to Many in Rails?

  - by Newbie

  Hello! In my project, I have users and quests. One User can join multiple quests and one quest can have multiple users. So I created a table called questing, containing the user_id and the quest_id. In my user.rb I did following: require 'digest/sha1' class User < ActiveRecord::Base has_many :questings has_many :quests ,:through =>:questings ... My Quest.rb: class Quest < ActiveRecord::Base has_many :questings has_many :users ,:through =>:questings ... My Questing.rb: class Questing < ActiveRecord::Base belongs_to :quest belongs_to :user end Now I want to create a link or button on my /quests/show.html.erb, calling an action in my controller, which will create the relationship between user and quest. So, in my quest_controller I did: def join_quest @quest = Quest.find(params[:id]) puts '************************' puts 'join quest:' + @quest.id puts '************************' respond_to do |format| format.html { redirect_to(@quest) } format.xml { head :ok } end end and in my show.html.erb I did: <%= link_to 'join this quest!!!', :action => :join_quest %> Now, clicking on this link will cause an error like: Couldn't find Quest with ID=join_quest and the url points to */quests/join_quest* instead of */quests/1/join_quest* Now my questions: Is my quests_controller the right place for my join_quest action, or should I move it to my users_controller? Why do I get this error? How to solve it? What do I have to write in my join_quest action for saving the relationship? On my /users/show.html.erb I want to output all quests the user joined. How to do this? I have to get all this quests from my relationship table, right? How? I hope you can help me! THX!

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• Extra NotifyIcon shown in system tray

  - by Kettch19

  I'm having an issue with an app where my NotifyIcon displays an extra icon. The steps to reproduce it are easy, but the problem is that the extra icon shows up after any of the actual codebehind we've added fires. Put simply, clicking a button triggers execution of method FooBar() which runs all the way through fine but its primary duty is to fire a backgroundworker to log into another of our apps. It only appears if this particular button is clicked. Strangely enough, we have a WndProc method override and if I step through until the extra NotifyIcon appears, it always appears during this method so something else beyond the codebehind must be triggering the behavior. Our WndProc method is currently (although I don't think it's caused by the WndProc): Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message) 'Check for WM_COPYDATA message from other app or drag/drop action and handle message If m.Msg = NativeMethods.WM_COPYDATA Then ' get the standard message structure from lparam Dim CD As NativeMethods.COPYDATASTRUCT = m.GetLParam(GetType(NativeMethods.COPYDATASTRUCT)) 'setup byte array Dim B(CD.cbData) As Byte 'copy data from memory into array Runtime.InteropServices.Marshal.Copy(New IntPtr(CD.lpData), B, 0, CD.cbData) 'Get message as string and process ProcessWMCopyData(System.Text.Encoding.Default.GetString(B)) 'empty array Erase B 'set message result to 'true', meaning message handled m.Result = New IntPtr(1) End If 'pass on result and all messages not handled by this app MyBase.WndProc(m) End Sub The only place in the code where the NotifyIcon in question is manipulated at all is in the following event handler (again, don't think this is the culprit, but just for more info): Private Sub TrayIcon_MouseDoubleClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles TrayIcon.MouseDoubleClick If Me.Visible Then Me.Hide() Else PositionBottomRight() Me.Show() End If End Sub The backgroundworker's DoWork is as follows (just a class call to log in to our other app, but again just for info): Private Sub LoginBackgroundWorker_DoWork(ByVal sender As Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles LoginBackgroundWorker.DoWork Settings.IsLoggedIn = _wdService.LogOn(Settings.UserName, Settings.Password) End Sub Does anyone else have ideas on what might be causing this or how to possibly further debug this? I've been banging my head on this without seeing a pattern so another set of eyes would be extremely appreciated. :) I've posted this on MSDN winforms forums as well and have had no luck there so far either.

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• Programmatically setup a PEAP connection in Windows Mobile

  - by tomlog

  I have been working on this for a few days and this is doing my head in: Our application is built using the .NET Compact Framework 2.0 and running on Windows Mobile 5 & 6 devices. We can set the WLAN connection of the device programmatically using the Wireless Zero Config functions (described here: msdn.microsoft.com/en-us/library/ms894771.aspx), most notably the WZCSetInterface function which we pinvoke from our application. This works fine for WEP and WPA-PSK connections. In a recent effort to add support for WPA2 networks we decided to modify the code. We have successfully added support for WPA2 which uses a certificate for the 802.1x authentication by setting the correct registry settings before calling WZCSetInterface. Now we want to do the same for WPA2 using PEAP (MS-CHAPv2) authentication. When manually creating such a connection in Windows Mobile the user will be prompted to enter the domain/user/password details. In our application we will have those details stored locally and want to do this all programmatically without any user intervention. So I thought going along the same route as the certificate authentication, setting the correct registry entries before calling WZCSetInterface. The registry settings we set are: \HKCU\Comm\EAP\Config\[ssid name] Enable8021x = 1 (DWORD) LastAuthSuccessful = 1 (DWORD) EapTypeId = 25 (DWORD) Identity = "domain\username" (string) Password = binary blob containing the password that is encrypted using the CryptProtectData function (described here: msdn.microsoft.com/en-us/library/ms938309.aspx) But when these settings are set and I call WZCSetInterface with the correct parameters, it still prompts me with the User Logon dialog asking for the domain/username/password. Has anyone got an idea what I need to do to prevent the password dialog from appearing and connect straight away with the settings stored in the registry?

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• multiple form submission with one submit

  - by skylab

  I've been trying to think this through and figure out if it is possible or not. I'm using zen-cart as shopping cart software, but what I'd like to do, is hard code a page that is basically a list of 7-9 products, next to each product is a checkbox, so I'd like to figure out a way, via html,javascript or jquery to submit whichever forms(products) are checked to the cart. The typical form submission for a product looks something like this(sometimes there may be one or two additional hidden fields): <form name="cart_quantity" action="index.php?action=add_product" method="post" enctype="multipart/form-data"> <input type="hidden" name="cart_quantity" value="1"> <input type="hidden" name="products_id" value="7"> <input type="hidden" name="id[6]" value="9" id="attrib-6-9"> <input type="image" src="buy_button.png" alt="Add to Cart" title="Instructional Video Part 1: Add to Cart"> </form> There would be 7-9 of these on the page, each with a checkbox, so I'm assuming a script would need to figure out which ones where checked and submit them via the form action? Maybe there is a better way of going about this that I'm not thinking of because a)it's over my head or b)just haven't figured it out yet. Anyway is something like this possible?

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• Error: 'Sys' is undefined

  - by thegunner

  Hi, When I moved my website over to another server I've noticed now that ajax doesn't appear to be working. When I remote desktop to the server and go to the url on the server i.e. http://myserver/mywebsite ... everything works ok. When I open up the website in visual studio on the server it works as no problem as well. It's only when I connect remotely that the 'javascript' error occurs. To my web.config I've added: <httpHandlers> <remove verb="*" path="*.asmx"/> <add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" validate="false"/> </httpHandlers> <httpModules> <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> </httpModules> I've tried <compilation debug="false"/> and tried emptying web history and still no luck. Any ideas?

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• contentscript, dynamic created iframe, postmessage

  - by thefoyer

  I'm attempting to inject an iframe from a content script. From the content script, post a message to the iframe, without much success. This is the closest I have got. No errors/warnings in the console but it doesn't work (alert test). contentscript: var iframe = document.createElement("iframe"); iframe.setAttribute("src", "https://www.com/iframe.php"); iframe.id = "iframe01"; document.getElementsByTagName("body")[0].appendChild(iframe); //then I inject this "web_accessible_resources" script var script = document.createElement("script"); script.type = "text/javascript"; script.src = chrome.extension.getURL("postMessage.js"); document.getElementsByTagName("head")[0].appendChild(script); postMessage.js window.postMessage({msg: "test"}, "*"); I've also tried top.postMessage({msg: "test"}, "*"); And var iframe = document.getElementById('iframe01'); iframe.contentWindow.postMessage({msg: "test"}, "*"); EDIT: I tried to make sure the iframe was loaded before postMessage, even if I put an alert there, it would alert telling me the iframe was loaded. var iframe = document.getElementById('iframe01'); if (ifrm_prsto.contentWindow.document) //do postMessage EDIT2: I did get it to work by moving the iframe from the contentscript to the inject.js script. Wasn't totally ideal but I do have it working now, I guess. iframe.php window.addEventListener("message", function(e) {alert("test");}); I am however able to do the reverse, talk to the parent script from the iframe.

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• firefox does not load large size images

  - by Pradeep

  I am stuck with a kind of bug in FF, wherein it’s unable to load images of big size (I have 8 MB size of image) from the server. The loading of image is all fine on IE. I am still looking out for ways to get rid of this problem. I changed server(IIS) settings to allow bigger file sizes. Also, I used “load” event on image using JQuery and tried all sort of options listed here http://api.jquery.com/load-event/, but nothing worked so far. If anyone of you has come across any such similar problem, and a way to resolve it, it would be nice to hear from you Please note: high resolution images are part of the requirement. Code : <style> img { background-color: #FFFFFF; background-image: url(http://eremurus.hyd:8080/QMS/plugin/imagepanner/loader.gif); background-repeat: no-repeat; background-position: center center; } </style> <script src="../plugin/jquery-ui-1.8.7.custom/js/jquery-1.4.4.min.js" type="text/javascript"></script> <script> jQuery(document).ready(function($){ ///var _url = "http://eremurus.hyd:8080/QMS/plugin/imagepanner/floorPlan.jpg"; // set up the node / element _im =$("#main"); //_im.bind("load",function(){ $(this).fadeIn(); }); // set the src attribute now, after insertion to the DOM //_im.attr('src',_url); $("#main").one("load",function(){ alert('loaded'); }) .each(function(){ if(this.complete){ $(this).trigger("load"); } }); }); </script> </head> <body> <div id="target"><img id='main' src="http://eremurus.hyd:8080/QMS/plugin/imagepanner/floorPlan.jpg"> </img></div> </body> </html>

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• Surely eAsy but I am not able ... JQUERY UI - WIDGET - HEADER

  - by alex

  I was making this simple trial, but can anyone tell me why the distance from the border of DIV to the H2 header is so much ? How can I reduce it ? I don't want space ... Prova WIDGET <link rel="stylesheet" href="jquery-ui-1.8.custom/css/smoothness/jquery-ui-1.8.custom.css" type="text/css"> <link rel="stylesheet" href="jquery-ui-1.8.custom/development-bundle/ui/jquery-ui-1.8.custom.css" type="text/css"> <script src="jquery-ui-1.8.custom/development-bundle/jquery-1.4.2.js" type="text/javascript"></script> <script src="jquery-ui-1.8.custom/js/jquery-ui-1.8.custom.min.js" type="text/javascript"></script> <script type="text/javascript"> $(themify); function themify(){ $("div").addClass("ui-widget ui-widget-content ui-corner-all"); $("input").addClass("ui-button ui-button-text"); $(":header").addClass("ui-widget-header ui-corner-all"); //ui-widget } </script> <style>#test{display:none}</style> <script type="text/javascript"> function rendiVisibile(){ if(document.getElementById("test").style.display = "none"){ $("#test").css({"width":"200px","float":"right","text-align":"center"}); $("#test").show("slide",{},1000); } } </script> </head> <body> <h2>Tentativo widget con DIV</h2> <form action=""> <input type="button" value="Submit" id="pulsante" onclick="rendiVisibile()";><br/></br> <div id="test"> <h2>CIAO</h2> Un saluto </div> </form> </body>

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• python recursive iteration exceeding limit for tree implementation

  - by user3698027

  I'm implementing a tree dynamically in python. I have defined a class like this... class nodeobject(): def __init__(self,presentnode=None,parent=None): self.currentNode = presentnode self.parentNode = parent self.childs = [] I have a function which gets possible childs for every node from a pool def findchildren(node, childs): # No need to write the whole function on how it gets childs Now I have a recursive function that starts with the head node (no parent) and moves down the chain recursively for every node (base case being the last node having no children) def tree(dad,children): for child in children: childobject = nodeobject(child,dad) dad.childs.append(childobject) newchilds = findchildren(child, children) if len(newchilds) == 0: lastchild = nodeobject(newchilds,childobject) childobject.childs.append(lastchild) loopchild = copy.deepcopy(lastchild) while loopchild.parentNode != None: print "last child" else: tree(childobject,newchilds) The tree formation works for certain number of inputs only. Once the pool gets bigger, it results into "MAXIMUM RECURSION DEPTH EXCEEDED" I have tried setting the recursion limit with set.recursionlimit() and it doesn't work. THe program crashes. I want to implement a stack for recursion, can someone please help, I have gone no where even after trying for a long time ?? Also, is there any other way to fix this other than stack ?

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• Why do I get "request for member in something not a struct or union" from this code?

  - by pyroxene

  I'm trying to teach myself C by coding up a linked list. I'm new to pointers and memory management and I'm getting a bit confused. I have this code: /* Remove a node from the list and rejiggle the pointers */ void rm_node(struct node **listP, int index) { struct node *prev; struct node *n = *listP; if (index == 0) { *listP = *listP->next; free(n); return; } for (index; index > 0; index--) { n = n->next; if (index == 2) { prev = n; } } prev->next = n->next; free(n); } to remove an element from the list. If I want to remove the first node, I still need some way of referring to the list, which is why the listP arg is a double pointer, so it can point to the first element of the list and allow me to free the node that used to be the head. However, when I try to dereference listP to access the pointer to the next node, the compiler tells me error: request for member ‘next’ in something not a structure or union . What am I doing wrong here? I think I might be hopelessly mixed up..?

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• IntelliJ inspection -- non-thrown exception

  - by skiaddict1

  This is a follow-up question to 1832203. I'm making it a new question as well, because it seems that posting an answer to a question doesn't change its position on the java page and so I'm worried that it won't get seen. Apologies if I've just stepped on some etiquette toes. I'm an IntelliJ newbie -- started using it two days ago and I'm absolutely head-over-heels in love! One of the things I adore is the code inspections. However... In one of my classes I often create exceptions without throwing them. If I can't turn off (or downgrade) the inspection warning for this then I can see I'm going to end up ignoring inspections on at least that file (if not the entire project), which would be a real pity. I've done a search in the inspection settings for "exception", and found nothing that relates exactly, so I turned them all off just to see, and it's still doing it (even after a rebuild...BTW when are inspections redone? at save? at rebuild? ???), so I would really like some help on how to make this one into an info/typo level -- which I can then ignore. Using the free version, if that makes any difference TIA to all those experienced IntelliJ warriors out there!

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• Custom layout in Android: scrollable graphic with selectable elements over top

  - by Martyn

  Hi, I'm fairly new to the Android platform and was wondering if I could get some advice for my current head scratcher: I'm making an app which in one view will need an image, which can be scrolled on one axis, with a load of selectable points over the top of it. Each point needs to be positionable on the x and y (unlikely to change once the app is running, but I'll need to fine tune the positions whilst I'm developing it). I'd like to be able to let the user select each point and have a graphic drawn on the point the user has selected or just draw a graphic on one/more points without user intervention. I though for the selectable points I could extend the checkbox with a custom image for the selected state - does that sounds right, or is there a better way of doing this? Is there any thing I can read up on doing this, I can't seem to find anything on the net about replacing the default images? I was going to use the absolute layout, but see that it's been depreciated and I can't find anything to replace it. Can anyone give me some code or advice on where to read up on what I need to do? Thank you in advance

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• PUT-ing a form to update a row, but I can't find the id. Where is it?

  - by montooner

  How should I be passing in the ID? Error: Couldn't find Product without an ID Form: <% form_for :product, @product, :url => { :action => :update } do |f| %> <%= f.error_messages %> <p> <%= f.label :names %><br /> <%= f.text_field :names %> </p> <p> <%= f.submit 'Update' %> </p> <% end %> Controller (for /products/edit/1 view): def edit @product = Product.find(params[:id]) end Controller (to change the db): def update @product = Product.find(params[:id]) respond_to do |format| if @product.update_attributes(params[:product]) format.html { redirect_to(@product, :notice => 'Product was successfully updated.') } format.xml { head :ok } else format.html { render :action => "edit" } format.xml { render :xml => @product.errors, :status => :unprocessable_entity } end end end

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• Sequential searching with sorted linked lists

  - by John Graveston

  struct Record_node* Sequential_search(struct Record_node *List, int target) { struct Record_node *cur; cur = List->head ; if(cur == NULL || cur->key >= target) { return NULL; } while(cur->next != NULL) { if(cur->next->key >= target) { return cur; } cur = cur->next; } return cur; } I cannot interpret this pseudocode. Can anybody explain to me how this program works and flows? Given this pseudocode that searches for a value in a linked list and a list that is in an ascending order, what would this program return? a. The largest value in the list that is smaller than target b. The largest value in the list that is smaller than or same as target c. The smallest value in the list that is larger than or same as target d. Target e. The smallest value in the list that is larger than target And say that List is [1, 2, 4, 5, 9, 20, 20, 24, 44, 69, 70, 71, 74, 77, 92] and target 15, how many comparisons are occurred? (here, comparison means comparing the value of target)

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• Retrieving my own data via FaceBook API

  - by goggin13

  I am building a website for a comedy group which uses Facebook as one of their marketing platforms; one of the requirements for the new site is to display all of their Facebook events on a calendar. Currently, I am just trying to put together a Python script which can pull some data from my own Facebook account, like a list of all my friends. I presume once I can accomplish this I can move to pulling more complicated data out of my clients account (since they have given me access to their account). I have looked at many of the posts here, and also went through the Facebook API documentation, including Facebook Connect, but am really beating my head against the wall. Everything I have read seems like overkill, as it involves setting up a good deal of infrastructure to allow my app to set up connections to any arbitrary user's account (who authorizes me). Shouldn't it be much simpler, given I only ever need to access 1 account? I cannot find a way to retrieve data without having to display the Facebook login window. I have a script which will retrieve all my friends, but it includes a redirect where I have to physically log myself in to Facebook. Would appreciate any advice or links, I just feel like I must be missing something simple. Thank you!

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• Please suggest other ways of communicating between server & client.

  - by Geo

  I'm writing a TCP chat server ( programming language does not mather ). It's a school project for my nephew, so it won't be released, and all questions I'm asking are just for my knowledge :). . Some of the things it will support: chatting between users ( doh ), it will be multithreaded sending each other files I know I could easily get away with all the stuff above if I go with serialization, and just send objects from client to server and back. But, if I do that, it will be limited to a specific programming language ( meaning clients written in other programming languages may not be able to deserialize the objects ). What would be the way to go so that other clients written in other languages could be supported? One way to go, off the top of my head, would be to go in this direction: the server & the client communicate by sending messages & chunks ( in lieu of other names ). Here's what I mean by this: every time the client/server wants to send something ( text message or file ) it will first send a simple text message ( newline terminated ) with the number of the chunks it will send. Example: command 4,20,30,40,50 Where command would be something like instant-message or file,4 would be the number of chunks to be sent, 20 would be the size in bytes of the first chunk, 30 of the 2nd, and so forth. after the message was sent, the client/server will start sending chunks ( of sizes mentioned in the sent message ). What do you think about implementing the client/server communication this way? What better options are there?

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• Git Svn dcommit error - restart the commit

  - by Rob Wilkerson

  Last week, I made a number of changes to my local branch before leaving town for the weekend. This morning I wanted to dcommit all of those changes to the company's Svn repository, but I get a merge conflict in one file: Merge conflict during commit: Your file or directory 'build.properties.sample' is probably out-of-date: The version resource does not correspond to the resource within the transaction. Either the requested version resource is out of date (needs to be updated), or the requested version resource is newer than the transaction root (restart the commit). I'm not sure exactly why I'm getting this, but before attempting to dcommit, I did a git svn rebase. That "overwrote" my commits. To recover from that, I did a git reset --hard HEAD@{1}. Now my working copy seems to be where I expect it to be, but I have no idea how to get past the merge conflict; there's not actually any conflict to resolve that I can find. Any thoughts would be appreciated. EDIT: Just wanted to specify that I am working locally. I have a local branch for the trunk that references svn/trunk (the remote branch). All of my work was done on the local trunk: $ git branch maint-1.0.x master * trunk $ git branch -r svn/maintenance/my-project-1.0.0 svn/trunk Similarly, git log currently shows 10 commits on my local trunk since the last commit with a Svn ID. Hopefully that answers a few questions. Thanks again.

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• How do I do a table join on two fields in my second table?

  - by Cannonade

  I have two tables: Messages - Amongst other things, has a to_id and a from_id field. People - Has a corresponding person_id I am trying to figure out how to do the following in a single linq query: Give me all messages that have been sent to and from person x (idself). I had a couple of cracks at this. Not quite right MsgPeople = (from p in db.people join m in db.messages on p.person_id equals m.from_id where (m.from_id == idself || m.to_id == idself) orderby p.name descending select p).Distinct(); This almost works, except I think it misses one case: "people who have never received a message, just sent one to me" How this works in my head So what I really need is something like: join m in db.messages on (p.people_id equals m.from_id or p.people_id equals m.to_id) Gets me a subset of the people I am after It seems you can't do that. I have tried a few other options, like doing two joins: MsgPeople = (from p in db.people join m in AllMessages on p.person_id equals m.from_id join m2 in AllMessages on p.person_id equals m2.to_id where (m2.from_id == idself || m.to_id == idself) orderby p.name descending select p).Distinct(); but this gives me a subset of the results I need, I guess something to do with the order the joins are resolved. My understanding of LINQ (and perhaps even database theory) is embarrassingly superficial and I look forward to having some light shed on my problem.

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• Problem using find function in Matlab

  - by Peter Etchells

  Hi all, I have two arrays of data that I'm trying to amalgamate. One contains actual latencies from an experiment in the first column (e.g. 0.345, 0.455... never more than 3 decimal places), along with other data from that experiment. The other contains what is effectively a 'look up' list of latencies ranging from 0.001 to 0.500 in 0.001 increments, along with other pieces of data. Both data sets are X-by-Y doubles. What I'm trying to do is something like... for i = 1:length(actual_latency) row = find(predicted_data(:,1) == actual_latency(i) full_set(i,1:4) = [actual_latency(i) other_info(i) predicted_info(row,2)... predicted_info(row,3)]; end ...in order to find the relevant row in predicted_data where the look up latency corresponds to the actual latency. I then use this to created an amalgamated data set, full_set. I figured this would be really simple, but the find function keeps failing by throwing up an empty matrix when looking for an actual latency that I know is in predicted_data(:,1) (as I've double-checked during debugging). Moreover, if I replace find with a for loop to do the same job, I get a similar error. It doesn't appear to be systematic - using different participant data sets throws it up in different places. Furthermore, during debugging mode, if I use find to try and find a hard-coded value of actual_latency, it doesn't always work. Sometimes yes, sometimes no. I'm really scratching my head over this, so if anyone has any ideas about what might be going on, I'd be really grateful.

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• post increment operator java

  - by srandpersonia

  I can't make heads or tails of the following code from "java puzzlers" by joshua bloch. public class Test22{ public static void main(String args[]){ int j=0; for(int i=0;i<100;i++){ j=j++; } System.out.println(j); //prints 0 int a=0,b=0; a=b++; System.out.println(a); System.out.println(b); //prints 1 } } I can't get the part where j prints 0. According to the author, j=j++ is similar to temp=j; j=j+1; j=temp; But a=b++ makes b 1. So it should've evaluated like this, a=b b=b+1 By following the same logic, shouldn't j=j++ be evaluated as, j=j j=j+1 Where does the temp come into picture here? Any explanations would be much appreciated. << I'm breaking my head over this. ;) Thanks in advance.

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• Is there any possibility of rendering differences betweeen firefox 3 and 3.5 and IE 7 and 8, even if

  - by metal-gear-solid

  I'm making a site for European client and he said Firefox 3 and IE 7 and 8 has more user than others browser for desktop in Europe http://gs.statcounter.com/#browser_version-eu-monthly-200812-201001-bar I've only IE 7 and Firefox 3.5.7 installed in my PC. Should I download portable Firefox 3.0 and test in it too even if I'm not using any new css property/selector which only has support in Firefox 3.5 or testing in 3.5.7 would be enough? And for IE testing in IE 7 would be enough or should i check my site in IE8 (downloading VPC image of IE8 and testing in VM) even if I'm not using any new css property/selector which only has support in IE8? Or is it necessary to use <meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" /> in <head> ? But what will happen when user will switch compatibility mode to IE 8 default rendering mode? Can we make site compatible in IE 7 and 8 both without using <meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" />? If yes, then what special we need to do.care/consider in css to make site identical in both?

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• Big task - problems with page refresh and ajax

  - by user1830414

  I have a navigation which load dynamically content via ajax. But if I refresh the page or visit another url and go back the current content is away and I see the old content under the first menu tab. Now I have to solve this problem. The index.php include the elements header_registrated.inc.php, navigation.inc.php and main_container.inc.php index.php: <?php include("inc/incfiles/header_registrated.inc.php"); ?> <?php if (!isset($_SESSION["userLogin"])) { echo "<meta http-equiv=\"refresh\" content=\"0; url=http://localhost/project\">"; } else { echo ""; } ?> <?php include("inc/incfiles/navigation.inc.php"); ?> <?php include("inc/incfiles/main_container.inc.php"); ?> <?php include("inc/incfiles/footer.inc.php"); ?> header_registrated.inc.php: <?php include ("inc/scripts/mysql_connect.inc.php"); session_start(); $user = $_SESSION["userLogin"]; ?> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>title</title> <link href="css/style.css" rel="stylesheet" type="text/css" /> <script language="JavaScript" src="js/framework/jquery.js"></script> <script language="JavaScript" src="js/dropdown/window.js"></script> <script language="JavaScript" src="js/navigation/navigation.js"></script> </head> <body> </body> navigation.inc.php: <div class="navigation"> <ul> <li id="1"> <div id="menuImage1" class="menuImage"></div> <div class="menuText"><p>Punkt 1</p></div> <div class="navigationDart"></div> </li> <li id="2"> <div id="menuImage2" class="menuImage"></div> <div class="menuText"><p>Punkt 2</p></div> </li> <li id="3"> <div id="menuImage3" class="menuImage"></div> <div class="menuText"><p>Punkt 3</p></div> </li> <li id="4"> <div id="menuImage4" class="menuImage"></div> <div class="menuText"><p>Punkt 4</p></div> </li> <li id="5"> <div id="menuImage5" class="menuImage"></div> <div class="menuText"><p>Punkt 5</p></div> </li> <li id="6"> <div id="menuImage6" class="menuImage"></div> <div class="menuText"><p>Punkt 6</p></div> </li> </ul> </div> main_container.inc.php: <div class="mainContainer"> <div class="containerHeader"> <div class="contentHeader"> </div> </div> <div class="contentContainer"> <div class="content"> </div> <div class="advertisement"> </div> </div> </div> Now the divs content, cnotentHeader and advertisement (in file main_content.inc.php) is filled via ajax. Also the navigation has some jquery effects which also have to be the same after page refresh. navigation.js: $(document).ready(function() { $.get('inc/incfiles/content_container/header/1.php', function(data) { $('.contentHeader').html(data); }); $.get('inc/incfiles/content_container/content/1.php', function(data) { $('.content').html(data); }); $.get('inc/incfiles/content_container/advertisement/1.php', function(data) { $('.advertisement').html(data); }); var current = '1.php'; $(".navigation li").click(function() { var quelle = $(this).attr('id') + ".php"; // the current content doesn't load again if(current === quelle) { return; } current = quelle; // content $(".content").fadeOut(function() { $(this).load("inc/incfiles/content_container/content/" + quelle).fadeIn('normal'); }) // advertisement $(".advertisement").fadeOut(function() { $(this).load("inc/incfiles/content_container/advertisement/" + quelle).fadeIn('normal'); }) // header $(".contentHeader").fadeOut(function() { $(this).load("inc/incfiles/content_container/header/" + quelle).fadeIn('normal'); }) }); $(".navigation li").click(function() { $(".menuImage").removeClass("menuImageActive1"); $(".menuImage").removeClass("menuImageActive2"); $(".menuImage").removeClass("menuImageActive3"); $(".menuImage").removeClass("menuImageActive4"); $(".menuImage").removeClass("menuImageActive5"); $(".menuImage").removeClass("menuImageActive6"); }); $("#1").mousedown(function() { $("#menuImage1").addClass("menuImageClick1"); // new class on mouse button press }); $("#1").mouseup(function() { $("#menuImage1").removeClass("menuImageClick1"); //remove class after mouse button release }); $("#1").click(function() { $("#menuImage1").addClass("menuImageActive1"); }); $("#2").mousedown(function() { $("#menuImage2").addClass("menuImageClick2"); // new class on mouse button press }); $("#2").mouseup(function() { $("#menuImage2").removeClass("menuImageClick2"); //remove class after mouse button release }); $("#2").click(function() { $("#menuImage2").addClass("menuImageActive2"); }); $("#3").mousedown(function() { $("#menuImage3").addClass("menuImageClick3"); // new class on mouse button press }); $("#3").mouseup(function() { $("#menuImage3").removeClass("menuImageClick3"); //remove class after mouse button release }); $("#3").click(function() { $("#menuImage3").addClass("menuImageActive3"); }); $("#4").mousedown(function() { $("#menuImage4").addClass("menuImageClick4"); // new class on mouse button press }); $("#4").mouseup(function() { $("#menuImage4").removeClass("menuImageClick4"); //remove class after mouse button release }); $("#4").click(function() { $("#menuImage4").addClass("menuImageActive4"); }); $("#5").mousedown(function() { $("#menuImage5").addClass("menuImageClick5"); // new class on mouse button press }); $("#5").mouseup(function() { $("#menuImage5").removeClass("menuImageClick5"); //remove class after mouse button release }); $("#5").click(function() { $("#menuImage5").addClass("menuImageActive5"); }); $("#6").mousedown(function() { $("#menuImage6").addClass("menuImageClick6"); // new class on mouse button press }); $("#6").mouseup(function() { $("#menuImage6").removeClass("menuImageClick6"); //remove class after mouse button release }); $("#6").click(function() { $("#menuImage6").addClass("menuImageActive6"); }); $("#1").click(function(){ $(".navigationDart").animate({ top: "16px" }, 500 ); }); $("#2").click(function(){ $(".navigationDart").animate({ top: "88px" }, 500 ); }); $("#3").click(function(){ $(".navigationDart").animate({ top: "160px" }, 500 ); }); $("#4").click(function(){ $(".navigationDart").animate({ top: "232px" }, 500 ); }); $("#5").click(function(){ $(".navigationDart").animate({ top: "304px" }, 500 ); }); $("#6").click(function(){ $(".navigationDart").animate({ top: "376px" }, 500 ); }); }); My idea was it to work with if(isset($_SESSION['ajaxresponse'])) but I don't no how to do this. Please help me. I have the feeling that I've searched the whole web to find an answer.

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• Sharing code between two or more rails apps... alternatives to git submodules?

  - by jtgameover

  We have two separate rails_app, foo/ and bar/ (separate for good reason). They both depend on some models, etc. in a common/ folder, currently parallel to foo and bar. Our current svn setup uses svn:externals to share common/. This weekend we wanted to try out git. After much research, it appears that the "kosher" way to solve this is using git submodule. We got that working after separating foo,bar,common into separate repositories, but then realized all the strings attached: Always commit the submodule before committing the parent. Always push the submodule before pushing the parent. Make sure that the submodule's HEAD points to a branch before committing to it. (If you're a bash user, I recommend using git-completion to put the current branch name in your prompt.) Always run 'git submodule update' after switching branches or pulling changes. All these gotchas complicate things further than add,commit,push. We're looking for simpler ways to share common in git. This guy seems to have success using the git subtree extension, but that deviates from standard gitand still doesn't look that simple. Is this the best we can do given our project structure? I don't know enough about rails plugins/engines, but that seems like a possible RoR-ish way to share libraries. Thanks in advance.

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