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• Eclipse Class File Metadata

  - by Alex

  In Visual Studio, I can obtain a succinct list of public methods/members exposed in a class for which I do not have the source (i.e. bundled inside a DLL) by pressing F12 (GoToDefinition). Similarly, I am learning the Android API - in Eclipse. Jumping to an Android framework method definition produces decompilation output which is not intuitive to read, and is very verbose. To mimic results like Visual Studio, I am considering several options: How can I format the decompilation output to be 'cleaner' - I have looked through Eclipse's preferences menus and have not found a way to do this. How do I 'add corresponding source files' once Google provides it, so that jumping to definition yields the actual definition? Is there a plugin that does this already? I looked into Jadclipse, but that project has not been updated in several years, and is still a decompiler. Thank you in advance.

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• How JQuery data validation plugin works on the submit action

  - by kwokwai

  Hi all, I am learning how to use JQuery validation plugin, and came across some questions about the JQuery magic that works on the sumbit action. I got a simple HTML form which has got an input text field like this: <form class="cmxform" id="commentForm" method="get" action=""> <input id="cname" name="name" size="25" class="required" minlength="2" /> <input class="submit" type="submit" value="Submit"/> </form> The magic happened when I tried not to input any data into the field and pressed the submit button. I saw an error message in red pop up, and no matter how hard and how many times I pressed the submit button, nothing was submitted. It seemed that there was some scripts that disabled the submit action, but I just couldn't find which lines of codes in the JQuery Validatyion Plugin that did it.

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• jQuery: Self Executing Plugin?

  - by GnrlBzik

  I am working on expansion of my jQuery plug-in authoring knowledge, just playing around with my own ideas for learning benefits. So i was wondering how you guys tackle the need of plugin executing without any user specific input. So I have a need for plug-in that executes right away after document is ready, without any user's specific input just as long as doc is loaded, so the only way I see how to execute plug-in on it's own is to attach handler to ready listener that executes my function which I extended the jQuery with. And because this needs to be self enclosed, part of the code, I attach handler to event listener within the function. So how else could one tackle this? Any take at this is appreciated. Thank you in advance everyone.

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• summer experiment: GWT & python for a trading game- arch question

  - by sadhu_

  Hi, As a summer learning experiment, I'm thinking of coding up a web front end for a trading game i wrote in python, that generates share prices and random snippets of text. I am sort of struggling with how this should work on the back-end though. I'd rather have my GWT client page interact with the python share price generator, than to try and re-code it in java. I suppose i could use an sqlite db, and then use jdbc to pick up the prices, but i was wondering if there is a better way, for me to be able to poll some python script either from my client page, or from the serverside java code ? I found this python wrapper, but i'm not sure how i could use it though: http://code.google.com/apis/visualization/documentation/dev/gviz_api_lib.html Thanks.

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• What's the point of lambda in scheme?

  - by incrediman

  I am learning scheme. I know how to use both lambda and let expressions. However I'm struggling to figure out what the point is of using lambda. Can't you do everything with let that you can with lambda? It would be especially helpful to see an example of a situation where a lambda expression is a better choice than let. One other thing - are there also situations where let is more useful than lambda? If so such an example would be nice as well. Thanks!

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• Open a chrome tab from delayed javascript window.open

  - by jettero

  When I window.open("http://blarg") in chrome, I get a new tab. If I delay the open, say using a jquery $(hrm).animate({},5e3,function(){window.open(url)); it opens the url in a new window with no status bar, etc — if I give it permission to pop-up that is. I'm looking for a way to get the instant behavior, that is, I wish to open a URL after an animation, but still in a new tab. I imagine I could get by with learning a way to instruct chrome to never ever open pop-ups and to always open them in tabs (I imagine there's a webkit setting, why it's not a built in is a mystery); but I'd rather try to find a way to do it from the javascript if possible. I somewhat doubt there's any way to do this though. I'm not aware of any javascript that's tab-aware.

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• Why should I use a container div in HTML?

  - by lara.robertson

  I am currently learning html/css, and have noticed a common technique is to place a generic container div in the root of the body tag: <html> <head> ... </head> <body> <div id="container"> ... </div> </body> </html> Is there a valid reason for doing this? Why can't the css just reference the body tag?

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• How do you implement syntax highlighting?

  - by ML

  I am embarking on some learning and I want to write my own syntax highlighting for files in C++. Can anyone give me ideas on how to go about doing this? To me it seems that when a file is opened: It would need to be parsed and decided what type of source file it is. Trusting the extension might not be fool-proof A way to know what keywords/commands apply to what language A way to decide what color each keyword/command gets I want to do this on OS X, using C++ or Objective-C. Can anyone provide pointers on how I might get started with this?

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• Netlink user-space and kernel-space communication

  - by sasayins

  Hi, I am learning programming in embedded systems using Linux as my main platform. And I want to create a Device Event Management Service. This service is a user-space application/daemon that will detect if a connected hardware module triggered an event. But my problem is I don't know where should I start. I read about Netlink implementation for userspace-kernelspace communication and it seems its a good idea but not sure if it is the best solution. But I read that the UDEV device manager uses Netlink to wait a "uevent" from the kernel space but it is not clear for me how to do that. I read about polling sysfs but it seems it is not a good idea to poll filesystem. What do you think the implementation that should I use in my service? Should I use netlink(hard/no clue how to) or just polling the sysfs(not sure if it works)? Thanks

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• syntax error in python:

  - by pecker

  Hello, I'm learning python. It gives syntax error in this script. I'm unable to figure out. import exceptions class FOUND(Exception): pass x = [1,2,3,4,56,73,29,35,12,32,63,12,76,75,89] while True: test = int(raw_input('Enter integer to be checked in list:')) try: count = -1 for y in x: count += 1 if y == test: raise FOUND except ValueError,e: print "Not a valid integer (%d)"%(e) except FOUND: print "Found (%d) at (%d)"%(test,count) else: print "Not found ,Appending (%d) to list at location (%d)"%(test,count+1) x.append(test) finally: print "The List:" print x print " " Invalid syntax & it highlights comma in this line: 'except ValueError,e:'

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• How to add a php page to Wordpress

  - by rutherford

  I want to create a custom page for my Wordpress blog that will execute my php code in it, whilst remaining a part of the overall site css/theme/design. The php code will make use of 3rd party APIs (so I need to include other php files) How do I accomplish this? N.B. I do not have a specific need to interact with the Wordpress API - apart from including certain other php libs I need I have no other dependencies in the PHP code I want to include in a WP page. So obviously any solution that didn't require learning the WP api would be the best one.

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• Question about AJAX

  - by Doug

  function showHint(str) { if (window.XMLHttpRequest) { xmlhttp=new XMLHttpRequest(); } else { xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); } xmlhttp.onreadystatechange=function() { if (xmlhttp.readyState==4 && xmlhttp.status==200) { document.getElementById("games").innerHTML=xmlhttp.responseText; } } xmlhttp.open("GET","hw9.database.php?name="+str,true); xmlhttp.send(); } I'm learning AJAX at the moment. The code here basically receives the echo from the PHP and then puts it in element id games. My question is, if I wanted to have AJAX send 3 different http requests to 3 different PHP scripts and if I wanted to retrieve data from each one and then put it in 3 different element id's then would I make 3 copies of this same function? I would imagine that there should be a more efficient way. Thanks!

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• Assigning a MVC Controller property from Asp.Net page

  - by JasonMHirst

  I don't know if I've understanding MVC correctly if my question makes no sense, but I'm trying to understand the following: I have some code on a controller that returns JSON data. The JSON data is populated based on a choice from a dropdown box on an Asp.Net page. I thought (incorrectly) that Session variables would be shared between the Asp.Net project and the MVC Project. What I'd like to do therefore (if this is possible), is to call a Sub on the MVC that sets a variable before the JSON query is run. I have the following: Sub SetCountryID(ByVal CountryID As Integer) Me.pCountrySelectedID = CountryID End Sub Which I can call by the following: Response.Write("http://localhost:7970/Home/SetCountryID/?CountryID=44") But this then results in a blank page - again obviouslly totally incorrect! Am I going about MVC the wrong way or do I still have a hell of a lot more learning to do? Is this even possible to do?

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• Which langauge should i use for Artificial intelligence on web projects

  - by Mirage

  I have to do one project for my thesis involving Artificial intelligence, collaborative filtering and machine learning methods. I only know PHP/mysq/JS, and there is not much AI stuff examples in PHP. There are some books on AI on internet but they use Java , Python. Now I have to apply AI techniques on web application. Which language should i choose java or python. I searhed on internet that I can call java classes inside my php so that can help as as I am very good at php I have also seen that python can also be used with php as well So which way should I go and roughly how much it will take me to learn java I have done java basics but that was 6 years ago

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• Will WF 4.0 make me Obsolete

  - by codemnky

  I saw a post on Oslo about making us obsolete. I just happened to listen to the latest Deep Fried Episode with Brian Noyes. They were talking about SharePoint and Windows Workflow and how the "dream" of Windows Workflow is to let mere Business Analyst Drag and Drop their way to a functioning service. I am a newbie dotnet developer, and afraid that by the time I get to Consulting "Level" my skills would be obsolete. Should I abandon learning basic skills and just learn how to work with Frameworks and Packaged applications such as SAP, SharePoint, BizTalk. Am I wasting time trying to learn Expression Trees and Func of T's?

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• Lightweight PHP library alternative to common MVC frameworks

  - by artarad

  Hi hi, I'm looking for a easy to learn php library to use for my coming web app project. I've recently finished a web app with fully handwritten raw php code and it's absolutely hard to be done again for another project. even though I have the recent project code snippets to be used again, but due to their non-structural arrangement (not object oriented), i have no passion to use 'em again. I have no experience with common frameworks like ZF, CakePhp, CodeIgniter, so I think to get my hands on a multipurpose OO library for my web app and the framework learning will be the next step! any suggestion? UPDATE: Many thanks guys, I have not enough time to get through the depth of every lib or framework you have kindly introduced. Since I'm going one step further I'm going to use ZF as famous framework which could provide me more job opportunities perhaps. thankssss :)

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• Migrating from Forms to WPF

  - by Jason Williams

  We're considering migrating a WinForms app to WPF, but are just starting on the WPF learning curve now that 4.0 is out. What I'd like to do is migrate our application commands (cut, copy, paste, etc) to a WPF-like command-binding system, while still running as a WinForms app - but in such a way as to make the migration easy when we go ahead with WPF. The ideal approach would be to implement our commands using the WPF command interfaces, classes and events directly, and simply hooking the WinForms events up to them with our own dispatcher. Has anyone tried something like this or know if it might be possible?

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• Problems with noobs putting my GA code into their sites

  - by dclowd9901

  I don't mean for the title to be derogatory, but this is a rather frustrating problem, and I'm looking for a good workaround, given a language barrier involved. I have a site set up for a plugin I wrote, and, rather than use the site's resources to write their own code, I've had people simply rip the code from the samples on the site. Normally, this wouldn't be any issue at all, but they are also taking my Google Analytics instantiation, so my Analytics data is getting very skewed by incorporating visitation data from their websites. I've been able to contact the English-speaking site owners with little issue. The problem lies in the Japanese language sites that are yanking the code. I have no idea how to ask them to take down the analytics portion. Long-term, I'm providing a package that streamlines the learning-to-use process, but in the meantime, what can I do about this language barrier? Is there a way around this problem that I haven't thought of?

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• Simulating a cookie-enabled browser in PHP

  - by Itamar Benzaken

  How can I open a web-page and receive its cookies using PHP? The motivation: I am trying to use feed43 to create an RSS feed from the non-RSS-enabled HighLearn website (remote learning website). I found the web-page that contains the feed contents I need to parse, however, it requires to login first. Luckily, logging in can be done via a GET request so it's as easy as fopen()ing "http://highlearn.website/login_page.asp?userID=foo&password=bar" for example. But I still need to get the cookies generated when I logged in, pass the cookies to the real client (using setcookie() maybe?) and then redirect.

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• HTTP authentication and filesend in C

  - by sfactor

  i have some parsed data in two files. i need to send these to a webserver of a website. i also need to be logged into the webserver first. i am new to this web interaction thing. i just need to know how might i go about doing this. i am learning the libcurl library so i guess in can send standard HTTP POST messages. i will make a simple webserver to test it myself. can anyone tell me what kind of interaction is needed. by that i mean how do i send the username and password information, know that i am logged in and then be send the files. may be some examples of Form Posts which i believe is what i shud be doing right now.

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• Beginner's resources/introductions to classification algorithms.

  - by Dirk

  Hi, everybody. I am entirely new to the topic of classification algorithms, and need a few good pointers about where to start some "serious reading". I am right now in the process of finding out, whether machine learning and automated classification algorithms could be a worthwhile thing to add to some application of mine. I already scanned through "How to Solve It: Modern heuristics" by Z. Michalewicz and D. Fogel (in particular, the chapters about linear classifiers using neuronal networks), and on the practical side, I am currently looking through the WEKA toolkit source code. My next (planned) step would be to dive into the realm of Bayesian classification algorithms. Unfortunately, I am lacking a serious theoretical foundation in this area (let alone, having used it in any way as of yet), so any hints at where to look next would be appreciated; in particular, a good introduction of available classification algorithms would be helpful. Being more a craftsman and less a theoretician, the more practical, the better... Hints, anyone?

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• Page content bleeding past footer, dynamic resize?

  - by Spider

  Hey all im learning as i go with editing CSS and PHP and ive manage to put together a layout, looks fine on the main page, but I noticed the content is not stretching properly height wise when i goto click on the 3D gallery. Here is the a link to the page that has the issue: http://www.idreamfx.com/wp/?page_id=36&album=1&gallery=2 as you can see its bleeding past the footer, and the content section is not resizing properly. What steps do i take to allow it to be dynamically resized with the content in it? Doing some searching i came across the code: but i'm not sure if how or rather, where to apply such a code or what it really does?

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• Convert the code from PHP to Ruby

  - by theband

  public function getFtime() { $records=array(); $sql="SELECT * FROM `finishedtime`"; $result=mysql_query($sql); if(!$result){throw new Exception(mysql_error());} if(mysql_num_rows($result)==0){return $records;} while($row=mysql_fetch_assoc($result)){$records[]=$row;} return $records; } I am in the process of learning Ruby, can anyone convert this code into Ruby. This will make me construe on how to run a query and thrown the fetched result back.

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• Understanding run time code interpretation and execution

  - by Bob

  I'm creating a game in XNA and was thinking of creating my own scripting language (extremely simple mind you). I know there's better ways to go about this (and that I'm reinventing the wheel), but I want the learning experience more than to be productive and fast. When confronted with code at run time, from what I understand, the usual approach is to parse into a machine code or byte code or something else that is actually executable and then execute that, right? But, for instance, when Chrome first came out they said their JavaScript engine was fast because it compiles the JavaScript into machine code. This implies other engines weren't compiling into machine code. I'd prefer not compiling to a lower language, so are there any known modern techniques for parsing and executing code without compiling to low level? Perhaps something like parsing the code into some sort of tree, branching through the tree, and comparing each symbol and calling some function that handles that symbol? (Wild guessing and stabbing in the dark)

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• Memory Allocation - Arduino

  - by Joey Arnold Andres

  I'm new to this low level stuff. I'm currently learning arduino. I'm currently using an Arduino Mega 2560 and in our course we are practicing memory management. I'm a pro at memory management in pc but somehow I'm having crazy problems here in arduino. For instance: The arduino have 8192B, I'm trying to overflow it with uint_16 so I made an array of 8192/16 which is 512. so I did uint16_t A[512+1]; Well I expected that to cause an overflow. What is wrong with my concept?

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