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• How will a search engine read data from my Ajax-based webapp?

  - by Jack W-H

  OK, not entirely related to programming, so I'm sorry. But I'd like to know about this: So I've got a webapp. There's one column where a list of results are fetched from the database. When you click one, jQuery fetches the information associated with that result and puts it into the second column - all without a refresh and using Ajax. Is it possible for Google to still read it etc.? I understand it can follow links... but presumably not Javascript actions etc.? If this is the case, what do other Ajax-heavy websites do about search engine optimisation? Jack

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• MySQL problem: How to get desired rows.

  - by Joonas Köppä

  I have been trying to solve this problem for 2 hours now but I cant understand the solutions others have given people with a similar problem. Ive seen some answers but can't apply it to my own needs. I have a table of users and their times in different sports events. I need to make a scoretable that shows the user with the best time, second best etc. The table before sorting and retrieving looks as follows: | Name | Time | Date | '''''''''''''''''''''''''''''''''''''''''''''' | Jack | 03:07:13 | 2010-12-01 | | Peter | 05:03:12 | 2010-12-03 | | Jack | 03:53:19 | 2010-12-04 | | Simon | 03:22:59 | 2010-12-02 | | Simon | 04:01:11 | 2010-12-09 | | Peter | 03:19:17 | 2010-12-06 | '''''''''''''''''''''''''''''''''''''''''''''' | Name | Time | Date | '''''''''''''''''''''''''''''''''''''''''' | Jack | 03:07:13 | 2010-12-01 | | Peter | 03:19:17 | 2010-12-06 | | Simon | 03:22:59 | 2010-12-02 | '''''''''''''''''''''''''''''''''''''''''' I know answers to this problem lie in another question asked on this very site: CLICK HERE I just have no idea how to apply it to fullfill my needs. Help is highly appreciated. Thank you -Joonas

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• Turning HTML character entities to 'regular' letters... why is it only partially working?

  - by Jack W-H

  I'm using all of the below to take a field called 'code' from my database, get rid of all the HTML entities, and print it 'as usual' to the site: <?php $code = preg_replace('~&#x([0-9a-f]+);~ei', 'chr(hexdec("\\1"))', $code); $code = preg_replace('~&#([0-9]+);~e', 'chr("\\1")', $code); $code = html_entity_decode($code); ?> However the exported code still looks like this: progid:DXImageTransform.Microsoft.AlphaImageLoader(src=’img/the_image.png’); See what's going on there? How many other things can I run on the string to turn them into darn regular characters?! Thanks! Jack

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• jQuery: detecting reaching bottom of scroll doesn't work, only detects the top! :(

  - by Jack Webb-Heller

  Hi folks! So basically my problem is a seemingly simple one. You can see it in action at http://furnace.howcode.com (please note that data is returned via Ajax, so if nothing happens give it a few moments!). What's MEANT to happen, is in the second column when you reach the bottom of scrolling, the next 5 results are returned. But what actually happens is it only returns the 5 results when you hit the TOP of the scroll area. Try it: scroll down, nothing happens. Scroll back up to the top, the results are returned. What's going wrong? Here's my code I'm using: $('#col2').scroll(function(){ if ($('#col2').scrollTop() == $('#col2').height() - $('#col2').height()){ loadMore(); } }); loadMore(); is the function that gets the data and appends it. So what's going wrong here? Thanks for your help! Jack

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• iPhone: Using plist to populate a grouped table

  - by Jack Griffiths

  Hi there, I was wanting to use a plist to populate my grouped table. I've had a look at the DrillDownSave sample project, and I'm still none-the-wiser. Although, I did learn that I could store hierarchies and suchlike in there. So here's the questions: How can I use my plist to add new items to my grouped table? I'm currently feeding the table with an array, and I've noticed that an array isn't going to be the best thing for me. When a user taps on an item in the plist, how can I push the view to the corresponding item? In other words, how can I push the view based on the selected row (which was generated by the plist) to it's next "view"? If that makes any sense, please reply. Thanks, Jack.

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• Why use Oracle Application Express for web app?

  - by Jack

  Hi all. I believe we're moving to Oracle Apex for future development. I've read about Oracle Apex on wikipedia and it's pro and con. It seem to me the con outweigh the pro but maybe I'm wrong. I get the sense that Oracle Apex is for DBA with little or no programing knowledge to setup a web app quickly sort like MS Access for none programmer. If you have Oracle Apex working experience, can you share your though? From wikipedia's entry, it doesn't seem like you need to know any programming language at all but just the PL/SQL? edit: Is Oracle Apex scalable? Can it handle traffic like Facebook's size? Thank. Jack

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• Using plist to populate a grouped table

  - by Jack Griffiths

  Hi there, I was wanting to use a plist to populate my grouped table. I've had a look at the DrillDownSave sample project, and I'm still none-the-wiser. Although, I did learn that I could store hierarchies and suchlike in there. So here's the questions: How can I use my plist to add new items to my grouped table? I'm currently feeding the table with an array, and I've noticed that an array isn't going to be the best thing for me. When a user taps on an item in the plist, how can I push the view to the corresponding item? In other words, how can I push the view based on the selected row (which was generated by the plist) to it's next "view"? If that makes any sense, please reply. Thanks, Jack.

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• CodeIgniter's XSS Protection is removing <script> tags from user inputs... but I don't want it to!

  - by Jack W-H

  Hey folks, CodeIgniter is brilliant but I'm using it to develop a site where users need to be able to share their code for websites. Unfortunately, CodeIgniter has been doing the "right" thing by removing <script> tags from my user's inputs into the database, so when it's returned data looks like this: [removed] User's data [removed] However, I need my site to DISPLAY script tags but obviously not PARSE them. How can I get CodeIgniter or PHP to return <script> tags, but still sanitise them for the database and return them without them executing? Thanks! Jack EDIT: By the way, it's not an option to use stuff like Markdown, everything has to output to copy-pastable code that could work with no modification somewhere else

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• Security precautions and techniques for a User-submitted Code Demo Area

  - by Jack W-H

  Hey folks Maybe this isn't really feasible. But basically, I've been developing a snippet-sharing website and I would like it to have a 'live demo area'. For example, you're browsing some snippets and click the Demo button. A new window pops up which executes the web code. I understand there are a gazillion security risks involved in doing this - XSS, tags, nasty malware/drive by downloads, pr0n, etc. etc. etc. The community would be able to flag submissions that are blatantly naughty but obviously some would go undetected (and, in many cases, someone would have to fall victim to discover whatever nasty thing was submitted). So I need to know: What should I do - security wise - to make sure that users can submit code, but that nothing malicious can be run - or executed offsite, etc? For your information my site is powered by PHP using CodeIgniter. Jack

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• Entity Framework does not display the last change from the database

  - by Jack

  Entity Framework does not display the last change from the database, but after sometime it show the updated content. I don't any special change on the server or on the page. Thank in advance. Jack Here is the code i use to get the list: var m = from r in ett.Article_Relations from i in ett.Article_Articles from a in ett.Article_Contents where r.MenuItemID == id && r.Article_Articles.ArticleID == i.ArticleID && a.LanguageID == LanguageID && i.ArticleID == a.Article_Articles.ArticleID select new ArticleViewModel { ArticleID = i.ArticleID, IsActive = i.IsActive, Author = i.ArticleAuthor, Content = a, DateCreated = i.DateCreated };

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• iPhone: error: request for member 'table' in something not a structure or union

  - by Jack Griffiths

  Hi there, When it comes to compiling my application, I get the error mentioned in the title. How would I go about remedying this error? Basically, I want to get from one table to the other. Hierarchy, navigation. NextViewController.m #import "RootViewController.h" #import "NextViewController.h" @implementation NextViewController - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Releases the view if it doesn't have a superview // Release anything that's not essential, such as cached data } - (void)dealloc { [super dealloc]; } - (IBAction) changeTable:(NSString *)str{ tblCSS.table = str; } The last line contains the error. If you need any more code, just ask. I'll amend this post with it. Cheers, Jack

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• Rails CSV import, adding to a related table

  - by Jack

  Hi, I have a csv importing system on my app (used locally only) which parses the csv file line by line and adds the data to the database table. This is based on a tutorial here. require 'csv' def csv_import @parsed_file=CSV::Reader.parse(params[:dump][:file]) n = 0 @parsed_file.each_with_index do |row, i| next if i == 0 #ignore the first row course = Course.new course.title = row[0] course.unit_code = row[1] course.course_type = row[2] course.value = row[3] course.pass_mark = row[4] if course.save n = n+1 GC.start if n%50==0 end flash.now[:message] = "CSV Import Successful, #{n} new courses added to the database." end redirect_to(courses_url) end This is all in the courses controller and works fine. There is a relationship that courses HABTM years and years HABTM courses. In the csv file (effectively in row[5] to row[8]) are the year_id s. Is there a way that I can add this within the method above. I am confused as to how to loop over the 4 items and add them to the courses_years table. Thank you Jack

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• iPhone: Navigation Bar button indefinitely links to it's own view.

  - by Jack Griffiths

  Hi there, When I navigate from the root view to another view, it works. However, when I want to get back, the navigation button links to itself. This goes on for about 6 taps, until it eventually goes back to the root view. This only occurs on one view, and the rest are working fine. I have no idea what code is causing this, but if you need any code, I will amend this post with it. Just ask for it. Thanks a lot, Jack.

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• Django how to handle # in variable name.

  - by Jack

  I've got a dictionary in python which is assigned as a template variable. One of the keys is named "#text" but when i try to access it using {{ artist.image.3."#text"}} I get an error which is File "/home/jack/Desktop/test/appengine/lib/django/django/template/__init__.py", line 558, in __init__ raise TemplateSyntaxError, "Could not parse the remainder: %s" % token[upto:] TemplateSyntaxError: Could not parse the remainder: "#text" So how can I use this in the template? I've tried putting quotes around it but to no avail. I'd like to not modify the dictionary if possible, but if its easy enough to do then I guess its okay. Thanks

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• destroy an android service

  - by Jack Trowbridge

  I am using a service in my android app, which is called when an alarm is activated by a calander. When the service has been activated i want it to be destroyed by the OnStart() method once it has completed its code. My OnStart() method: @Override public void onStart(Intent intent, int startId) { super.onStart(intent, startId); Vibrator vi = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE); vi.vibrate(5000); Toast.makeText(this, "MyAlarmService.onStart()", Toast.LENGTH_LONG).show(); //CODE HERE TO DESTROY SERVICE?? } This bassically means when the service is called it runs the code in the OnStart() method and i want it to destroy itself. Any Ideas, methods that would do this?. Thanks, jack.

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• Counting the most tagged tag with MySQL

  - by Jack W-H

  Hi folks My problem is that I'm trying to count which tag has been used most in a table of user-submitted code. But the problem is with the database structure. The current query I'm using is this: SELECT tag1, COUNT(tag1) AS counttag FROM code GROUP BY tag1 ORDER BY counttag DESC LIMIT 1 This is fine, except, it only counts the most often occurence of tag1 - and my database has 5 tags per post - so there's columns tag1, tag2, tag3, tag4, tag5. How do I get the highest occurring tag value from all 5 columns in one query? Jack

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• Commutative (operational transform) diffs for databases

  - by barrycarter

  What Unix program generates "diff"s between text files (or INSERT/UPDATE/DELETEs for databases) in such a way that the order that the "diff"s are applied in is irrelevant, and the result is the same regardless of order. Etherpad used to do something like this. Example (for a given document or database): % Adam makes a change X, then Bob makes a change Y, then Adam makes another change Z. % However, because of network latency, Adam sees the changes in this order: XZY, while Bob sees them in this order: YXZ. % However, the code/changes are written so that XYZ and YXZ yield the same result. Note: ideally, this can be done without having to do X/Y/Z inverse at any point. I have read http://stackoverflow.com/questions/2043165/operational-transformation-library but I'm not sure this really does what I want.

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• AJAX response inside jqplot not working

  - by JuanGesino

  I'm trying to render data from an AJAX response as a bar chart with jqplot. To render this bar chart I use two variables: s1 which contains the numbers ex: s1 = [22,67,32,89] ticks which contains the name corresponding to a number inside s1 ex: ticks = ["Jack", "Mary", "Paul", "John"] So my AJAX returns two variables, data1 and data2. When I console.log(data1) I get 22,67,32,89 When I console.log(data2) I get "Jack", "Mary", "Paul", "John" I then add the square brackets and change variable: s1 = [data1] ticks = [data2] When I console.log(s1) I get ["22,67,32,89"] When I console.log(ticks) I get "Jack", "Mary", "Paul", "John" And the graph does not render, this is my code: s1 = [data]; ticks = [data]; plot4 = $.jqplot('chartdiv4', [s1], { animate: !$.jqplot.use_excanvas, series:[{color:'#5FAB78'}], seriesDefaults:{ renderer:$.jqplot.BarRenderer, pointLabels: { show: true } }, axes: { xaxis: { renderer: $.jqplot.CategoryAxisRenderer, ticks: ticks }, yaxis:{min:0, max:100, label:'%',labelRenderer: $.jqplot.CanvasAxisLabelRenderer} }, highlighter: { show: false } }); });

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• iPhone: App crashes when I click on a cell in table view.

  - by Jack Griffiths

  Hi there, Compiling my application works—everything is fine. The only errors I get are by deprecated functions (setText). The only problem is now, is that when I tap on a cell in my table, the app crashes, even though it's meant to push to the next view in the stack. Any solutions are appreciated, if you need any code, just ask. Also, how can I only make sure that one cell goes to only one view? For example: When I tap on CSS, it takes me to a new table with different levels of CSS. WHen I tap on an item in that new view, it comes up with an article on what I just selected. Regards, Jack

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• Query to retrieve records by aplhabetic order, except for n predefined items which must be on top

  - by Ashraf Bashir

  I need to retrieve all records ordered alphabetically. Except for a predefined list of record's columns which their records should appear first in a given predefined order, then all other records should be sorted alphabetically based on the same column For instance, assume we have the following table which is called Names Lets assume the predefined list is ("Mathew", "Ashraf", "Jack"). I.e. these are the names of whom their records should be listed first as in the predefined order. So the desired query result should be: Which query could retrieve this custom order ? P.S, I'm using MySQL. Here's my trial based on comments' request: (SELECT * FROM Names WHERE Name in ('Mathew', 'Ashraf', 'Jack')) UNION (SELECT * FROM Names WHERE Name NOT IN ('Mathew', 'Ashraf', 'Jack') ORDER BY Name ASC); the first query result wasn't ordered as required.

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• Passing an array of data to a private function in CodeIgniter/PHP? [facepalm]

  - by Jack Webb-Heller

  So I thought this should be easy, but, I'm n00bing out here and failing epicly (as they say on teh interwebz). So here's my code: function xy() { $array['var1'] = x; $array['var2'] = y; echo $this->_z; } function _z($array) { $xy = $x.$y; return $xy; } So, why doesn't that seemingly simple code work? I know with views you can pass arrays and the variables are accessible in the views with just their array title, but, why doesn't it work in this case? Jack

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• Python how to handle # in a dictionary

  - by Jack

  I've got some json from last.fm's api which I've serialised into a dictionary using simplejson. A quick example of the basic structure is below. { "artist": "similar": { "artist": { "name": "Blah", "image": {"#text":"URLHERE","size": "small"} "image": {"#text":"URLHERE","size": "medium"} "image": {"#text":"URLHERE","size": "large"} } } } Any ideas how I can access the image urls of various different sizes. My attempts at accessing the #text variable don't seem to work because python doesn't appear to like #'s in the names. And any ideas how I can easily get the url for the depending on the size? Thanks, Jack

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• IIS6.0 asking for credentials after MS Updates

  - by Adam M.

  We have an IIS6.0 Server running on a Windows 2003 Server. Last weekend it went though maintenance, and updated a quite a few Windows updates, it is now brought up to current updates (as of March 29th). Previous to these updates we could connect to the Web page via the hostname or via a alias (there is a DNS and a WINS alias (the alias is the same name in both) that are both pointing to the system). Now since the updates it asks for credentials to access the page, when trying to access the page via IP, or by name. If you use the alias it will go right into the page. I had added a new alias in DNS and tried to access it via this name with the same effect. So it appears that the WINS alias allows the page to show up properly. I have seen this KB but http://support.microsoft.com/kb/871179 though not sure if it really is relevant to this issue. As it does refer to the 3 strikes rules to display the 401.1 error. The IIS Application pool is running under a domain account. Teh default page is allowing Anonymous login under a local account. Any thoughts? Thanks Adam

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• Windows Vista - Can Boot into Safe Mode Command Prompt, Cannot Access Flash Drive

  - by Adam

  Hey there, Got a laptop dropped into my lap. Has Vista installed. Normal boot never gets past the login screen. Safe mode will get past, but just barely. I can try and start the task manager at that point, but it never opens. Only reliable way to do anything I've got is the safe mode command prompt... Boots up and logs in fine. I can't see anything noticably wrong via regedit, but it's been a long time since I've had to fix up a Windows box... not sure that I would. Problem I'm having, is that I want to run ComboFix/etc, but have no way to get them on there... When I pop a flash drive in, it seems to mount it (flash drive flickers as normal) but it never seems to be mounted... I cannot access it through any drive letter on the command line. I managed to start the device manager (devmgmt.msc) and the flash drive was recognized and listed... Any ideas on how to get this thing going again? (Short of a reinstall.) (It has no CD drive, either, so burning files to CD would not be easy...) Thanks! Adam

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• Apache2.2 not responding on Windows 7 desktop

  - by Adam

  Afternoon! I'm having some trouble with Apache2.2 on Windows 7. For over a year it's been running no problem, but all of a sudden requests have just stopped responding. They don't ever time out, the browser just keeps on waiting for a response, which makes me think it's something blocking communication with Apache. Interestingly though, if I stop Apache the requests fail immediately. The Apache service is running, and using netstat I can see it listening on port 80 as configured: TCP 127.0.0.1:80 0.0.0.0:0 LISTENING If I stop the Apache service, that line disappears. I have an entry within my hosts file for each VHost I'm trying, all pointing to 127.0.0.1. Each VHost is configured to *:80. Nothing however is getting recorded in the access or error (at debug level) log files. I've verified the file paths are correct, even though they were never changed. Neither is anything getting recorded within Windows' Event Log. The problem showed up when I added a new VHost and restarted, however I hadn't been using it for a couple of days prior so I don't believe it's the config change. I have performed a syntax check to be sure, and when starting from the command prompt no errors are reported there. I do have Windows Firewall running, however I've verified the Apache rule is correct and tried turning it off to ensure that wasn't the problem. I've reinstalled Apache, in the hope it might magically fix something using the default config, but still no joy. I've also tried using a different port. I'm completely lost for ideas now. Can anybody help? Cheers Adam

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