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• Is it possible to do AJAX calls in a liquid template?

  - by Brian Armstrong

  I'm looking at the liquid templating language for Rails apps: http://wiki.github.com/tobi/liquid/ I'd like my users to also be able to make AJAX calls (just like the ones in rails for periodically_call_remote, observe_field, etc). Is this possible? Assuming the rails helpers can be added as filters, how will the user be able to modify what gets returned by the AJAX call? They cannot modify an rjs file on the server or anything like that. I suppose the AJAX call could return JSON (instead of rendered html) and then the javascript could use that to render something. But I'm having a little trouble envisioning how it would work exactly. If anyone can point me to an example of this or clarify it'd be much appreciated. Thanks!

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• add on click event to picturebox vb.net

  - by Matt Facer

  I have a flowLayoutPanel which I am programatically adding new panelLayouts to. Each panelLayout has a pictureBox within it. It's all working nicely, but I need to detect when that picture box is clicked on. How do I add an event to the picture? I seem to only be able to find c# examples.... my code to add the image is as follows... ' add pic to the little panel container Dim pic As New PictureBox() pic.Size = New Size(cover_width, cover_height) pic.Location = New Point(10, 0) pic.Image = Image.FromFile("c:/test.jpg") panel.Controls.Add(pic) 'add pic and other labels (hidden in this example) to the big panel flow albumFlow.Controls.Add(panel) So I assume somewhere when I'm creating the image I add an onclick event. I need to get the index for it also if that is possible! Thanks for any help!

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• Sniffing LPT Traffic

  - by ArcherT

  I need to intercept LPT output traffic. After a couple of hours of research, I've come to understand that the only way to do this is by writing a kernel-mode driver, more precisely a "filter driver"...? I've downloaded the WDK, but the terminology and vast number of driver types is a little overwhelming. I'm basically trying to understand what kind of driver I should be writing; my target environment is Windows XP SP2 and 3 only. Some background info, if it matters: I have a bunch of legacy DOS apps that print to LPT1. I'd like to be able to capture this output and redirect this data (after GDI calls) to a modern USB (network) printer. Fortunately, the latter part of the problem's easy. I'm hoping someone could point me in the right direction. TIA.

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• django link to any user profile in social comunity

  - by dana

  i am trying to build a virtual comunity, and i have a profile page, and a personal page. In the profile page, one can see only the posts of one user(the user whos profile is checked), in the personal page one can see his posts, plus all the posts he has subscribed to (just like in Facebook) it's a little confusing for me how i can link to the profile of one user, i mean when anybody clicks on a username, it should link to his personal profile page. for example, if someone searches name "abc", the rsult would be "abc",and link to his profile. How can i pass to one function the username or id of a linked user? i mean, showing the profile of the logged in user who is checking his profile is quite easy.But how about another user profile, if one wants to access it? thanks a lot!

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• Dropdown Menus In Drupal?

  - by Wade D Ouellet

  Hi, I have my Drupal site here so far: selkirk.treethink.net Each Primary Link at the top has a bunch of other primary links under it (sub links) I need to display these sub links when you hover over the parent primary link in a dropdown menu. Everything is in the primary links but there are parents (what you see at the top of the demo) and sub links (what should be in the dropdown). I'm not sure if I set up these menus wrong though...Drupal is a little awkward for me. I did download this module but I am not sure how to get it going to automatically dropdown a primary link's submenu items when rolled over: http://drupal.org/project/jquery_dropdown Thanks, Wade

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• Simple object creation with DIY-DI?

  - by Runcible

  I recently ran across this great article by Chad Perry entitled "DIY-DI" or "Do-It-Yourself Dependency Injection". I'm in a position where I'm not yet ready to use a IoC framework, but I want to head in that direction. It seems like DIY-DI is a good first step. However, after reading the article, I'm still a little confused about object creation. Here's a simple example: Using manual constructor dependency injection (not DIY-DI), this is how one must construct a Hotel object: PowerGrid powerGrid; // only one in the entire application WaterSupply waterSupply; // only one in the entire application Staff staff; Rooms rooms; Hotel hotel(staff, rooms, powerGrid, waterSupply); Creating all of these dependency objects makes it difficult to construct the Hotel object in isolation, which means that writing unit tests for Hotel will be difficult. Does using DIY-DI make it easier? What advantage does DIY-DI provide over manual constructor dependency injection?

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• Passing Querystring style parameters into Javascript file

  - by Mike Mengell

  Hi, Not sure if this is possible or even if I should do it, but I think it's quite interesting. I have a javascript file which I'm referencing in a flat HTML page. I'd like to pass in a parameter or two via the path to the script. Like this; <script src="/scripts/myJavascriptFile.js?config1=true" type="text/javascript"></script> Not really sure if it can work but it would make my solution a little easier for others to take my script and implement (arguable). Cheers, Mike

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• PHP: form action on same page, still show same until refresh

  - by Karem

  Yes, Im having a little edit profile page, index.php?mode=profile. Lets take the username in the editprofile form as example. The username is already in the username-field. So i changed from "Peter" to "Tom" and press save. The action is ?mode=profile&edit=true. So now when i have pressed save it has updated the column in the db from Peter to Tom. But this field keeps having the value "Peter" until if i do press refresh (or f5), then "Tom" will appear. Like it hasnt updated in the database anything, although it did but it still shows Peter until next refresh.. like it caches, but it shouldnt cache nothing? Any help on this? Is it because its on the same "page" / file? what can i do

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• Example code of libssh2 being used for port forwarding

  - by flxkid

  I'm looking for an example of how to use libssh2 to setup ssh port forwarding. I've looked at the API, but there is very little in the way of documentation in the area of port forwarding. For instance, using PuTTY plink, There is the remote port to listen on, but also the local port that traffic should be sent to. Is it the developers responsibility to do this part? Can an example be developed of this? Also, for the opposite, where a remote port is brought to a local port, do I use libssh2_channel_direct_tcpip_ex? What about an example of this? I really need to do this exact thing on a project right now. How hard would it be to develop a couple of samples of this? I'm willing to put up a bounty if need be to get a couple of working examples of this.

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• Reviving a deleted file for use in my workspace

  - by John Cowan

  Greetings We run perforce with several users. Each user has their own development website that shows files in their workspace. This is great for making and viewing changes to webpages before submitting them. Sometime ago, we deleted a few pages in Perforce. I would like to revive these pages, but not to make them visible on our live site. I want to view them in my workspace and on my dev site, but I do want to push them out to our live server. In the "depot" tab of my P4 client, I can see the deleted files. I cannot see them in the "Workspace" tab of my client. How can I revive them for use in my Workspace, but not make them live to the world? I'm not a P4 admin so I could use a little guidance. Thanks for any help,

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• cross domain access in iframe from parent to child

  - by Aparna

  Hi, Could someone please help me with this- I've 2 applications AAA and BBB. The homepage of AAA contains an iFrame which displays the application BBB. When I login to AAA, the same login details should be used to login to BBB(single signon) and on pageload of the homepage of AAA, homepage of BBB should also be loaded in the iFrame. I tried to use javascript to access the form elements of login page of BBB to enter the login data and submit. But the browser gives me a 'Access is denied' error. I did a little reading and came to know that cross- domain communication is not allowed by the browser. Could someone tell me how i can go about achieving this?

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• Negative execution time

  - by FinalArt2005

  Hello, I wrote a little program that solves 49151 sudoku's within an hour for an assignment, but we had to time it. I thought I'd just let it run and then check the execution time, but it says -1536.087 s. I'm guessing it has to do with the timer being some signed dataype or something, but I have no idea what datatype is used for the timer in the console (code::blocks console, I'm not sure if this is actually a separate console, or just a runner that runs the terminal from the local operating system), so I can't check what the real time was. I'd rather not run this again with some coded timer within my program, since I'd like to be able to use my pc again now. Anybody have any idea what this time could be? It should be somewhere between 40 and 50 minutes, so between 2400 and 3000 seconds. Regards, Erik

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• Rails STI: SuperClass Model Methods called from SubClass

  - by Karl

  I would like a little confirmation that I'm doing this correctly. Using rails single table inheritance I have the following models and class method: class PhoneNumber < ActiveRecord::Base def self.qual?(number) klass = self klass.exists?(:phone_number => phone_number) end end class Bubba < PhoneNumber end class Rufus < PhoneNumber end Bubba.qual?("8005551212") Tests pass and everything seems to work properly in rails console. Just wanted to confirm that I'm not headed for future trouble by using self in the superclass PhoneNumber and using that to execute class methods on subclasses from the parent. Is there a better way?

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• When to choose LAMP over ASP.NET?

  - by Carlo

  Hello. A friend wants to start a dating website, she wants me to help her. We still haven't discussed on what platform it'll be developed, but I'm thinking she'll suggest LAMP to save a buck (which is one reason already to chose over ASP.NET already). If the dating website does well, it'll potentially hold a large amount of data (I'm not sure if this would be another reason to consider either ASP.NET or LAMP). Anyway, I ask this from an ASP.NET developer point of view. I have very little, almost null experience with LAMP, and I don't like it very much either, so if she decides to go with PHP odds are I won't help her. So what would be some good points to bring up when deciding which platform to develop on? Please be objective, I don't want this to be argumentative or anything, try to stick to facts, not opinions alone. Thanks!

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• Web App Server hardware question. Which configuration?

  - by JBeckton

  I am pricing some new servers and I am not sure which configuration to get. The server will be running some web applications for our company. Some of them are ASP.Net sites and some are ColdFusion. The OS will be Win Server 2008 Web or Standard Edition. Do I need 2 processors or will a single quad core handle it? Xeon multi core Hyperthreading or non Hyperthreading? I am going 64bit so I can go higher than 4 Gigs of Ram. I am shopping at Dell and there are so many options, i do not want to get too much hardware and not use half of it because that would be a waste of money and I do not want to get too little and have to ask for more money to upgrade it later.

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• Compiler warning when passing NSError ** as a method parameter

  - by splicer

  I've been scratching my head about this for the last 4 hours, trying out all kinds of little experiments, but I can't seem to figure out what's going wrong. Could this be a compiler bug? Test.m: - (id)initWithContentsOfURL:(NSURL *)aURL error:(NSError **)error { if (!(self = [super init])) { return nil; } return self; } main.m: NSError *error; Test *t = [[Test alloc] initWithContentsOfURL:[NSURL fileURLWithPath:@"/"] error:&error]; Here's the compiler warning (from main.m): warning: incompatible Objective-C types 'struct NSError **', expected 'struct NSDictionary **' when passing argument 2 of 'initWithContentsOfURL:error:' from distinct Objective-C type I'm using the latest versions of Xcode and Snow Leopard.

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• Resources for widget creation

  - by Kenji Crosland

  My rails app is about to go live and I'm trying to figure out how to create a widget based on data on the site. My Javascript is not too hot--limited to the O'reilly head first book on JS. I can read simple Javascript okay but when it comes to writing it I'm a little lost. That said, I hope to roll out a widget, maybe a wordpress plugin too soon after my app is launched. Does anyone know of any rails plugins, javascript templates, tutorials or books that can get me going? I did ask a similar question before here: But my limited knowledge of JS kept me from implementing the suggested answer properly.

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• Help need to with MySQL query to join data spanning multiple tables and use data as column names

  - by gurun8

  I need a little help putting together a SQL query that will give me the following resultsets: and The data model looks like this: The tricky part for me is that the columns to the right of the "Product" in the resultset aren't really columns in the database but rather key/value pairs spanned across the data model. Table data is as follows: My apologies in advance for the image heavy question and the image quality. This just seemed like the easiest way to convey the information. It'll probably take someone less time to write the query statement to achieve the results than it did for me to assemble this question. By the way, the "product_option" table image is truncated but it illustrated the general idea of the data structure. The MySQL server version is 5.1.45.

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• How should I rewrite my code to make it amenable to unittesting?

  - by justin

  I've been trying to get started with unit-testing while working on a little cli program. My program basically parses the command line arguments and options, and decides which function to call. Each of the functions performs some operation on a database. So, for instance, I might have a create function: def create(self, opts, args): #I've left out the error handling. strtime = datetime.datetime.now().strftime("%D %H:%M") vals = (strtime, opts.message, opts.keywords, False) self.execute("insert into mytable values (?, ?, ?, ?)", vals) self.commit() Should my test case call this function, then execute the select sql to check that the row was entered? That sounds reasonable, but also makes the tests more difficult to maintain. Would you rewrite the function to return something and check for the return value? Thanks

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• How do I dynamically instantiate a class in javascript?

  - by Adam

  I'm starting out with classes in Javascript and have hit a wall. I've looked all over for a tutorial that goes a little further than simply how to construct a class (usually Animal) then extend the class and have a Method do something (Dog alert('Bark');). I have created a class that I want a user to be able to instantiate (is that the right word)? For example the first stage in my program is for the user to give the class a name, and then start to populate the various variables in the class. When they've done that they may do it again many times. So if: var className = new MyObject(); How do I dynamically create the name of the new object className and then refer to it later in the code?

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• How can I call a module in a Perl one-liner?

  - by Zaid

  Say I have a data file that I want to process; I want to take the maximum value of each of the column and append it to the end of each line. INPUT: T1 T2 T3 35.82 34.67 31.68 32.20 34.52 33.59 37.41 38.64 37.56 OUTPUT: T1 T2 T3 35.82 34.67 31.68 35.82 32.20 34.52 33.59 34.52 37.41 38.64 37.56 38.64 I'm trying to implement this as a one-liner. So far, this is what I've come up with, although it complains that &main::max is undefined: perl -MList::Util -ani.bak -e "print qq(@F).q( ).max(@F).qq(\n)" file1.txt It seems that I haven't loaded the List::Util module. What's wrong? And is the header column an issue? perlrun doesn't have a decent example on how to do this (actually it does now, my documentation was a little out-of-date).

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• Actionscript 3 Sprite AddChild

  - by Amy

  Im new to actionscript 3 and am a little confused about how the addchild function works. I want to draw 5 houses. each house has a roof and wall. Each wall has a door and a window. I have the following classes and this is how I grouped them class Main class House class Roof //a triangle class Wall //a rectangle class Door //a rectangle class Window //a square Im having trouble with inheritance of the classes. I cant made the wall class show up with a window and a door. Can someone point me to the right direction?

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• SSRS Passing values between list and subreport

  - by mjmcloug

  So this is like my third SSRS question and I've only been looking at it for a day :S This question may be a little sketchy as I'm still not up with the terminology. Basically I have a list that is bound to a "Select" of SiteId's. Inside this list I have a sub report. The idea is to pass these SiteId's into the sub report one at a time to generate a report for each site Id. But I can't figure out the expression required to pass this value in? Way off the mark? or is there an answer to this question

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• jQuery - Trigger click event on links with spacebar?

  - by Herb Caudill

  It looks like in most browsers, an <input type="submit"> treats both [spacebar] and [enter] as a click, but an <a> link only treats [enter] as a click. My app uses a number of links formatted to simulate buttons, so a user that is accustomed to tabbing to a button and pressing [spacebar] will be frustrated. This bit of jQuery solves the problem: $("a.Button").die("keypress").live("keypress", function(e) { if (e.which == 32) { $(this).trigger("click"); e.preventDefault(); } }); My question: Is this a reason not to do this? I'm a little reluctant to override the browser's default behavior on something as basic as this, but since I'm already abusing the link tag to make it look like a button, at least this way I'm not violating the user's expectations any further.

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• PHP Prepared Statement Returns -1

  - by pws5068

  I've been using prepared statements for a little while now and I've never had any problems. Now I'm trying to: $sql="SELECT PhotoID,Caption FROM Photos WHERE EntityID=? AND TypeID=? LIMIT ?,?"; $iDB = new mysqliDB(); // Extends mysqli $stmt = $iDB->prepare($sql); $stmt->bind_param('iiii',$entityID,$typeID,$minRange,$maxRange); $stmt->execute(); $stmt->bind_result($photoID,$caption); echo("Affected={$stmt->affected_rows}"); This prints -1. I have triple tested that all 4 values in bindParam are set, and that the sql query works when pasted into myAdmin with the respective values. Any idea what may be causing this?

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