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  • Divs over images using JavaScript

    - by Abhi
    Say I have an image with a couple of dots in a web page. When someone clicks on the dots I want a JavaScript function to be executed and then a div placed over the clicked dot in the image. Something akin to markers in maps. How do I go about doing this?

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  • QuadTrees - how to update when internal items are moving

    - by egarcia
    I've implemented a working QuadTree. It subdivides 2-d space in order to accomodate items, identified by their bounding box (x,y,width,height) on the smallest possible quad (up to a minimum area). My code is based on this implementation (mine is in Lua instead of C#) : http://www.codeproject.com/KB/recipes/QuadTree.aspx I've been able to successfully implement insertions and deletions successfully. I've turn now my attention to the update() function, since my items' position and dimensions change over time. My first implementation works, but it is quite naïve: function QuadTree:update(item) self:remove(item) return self.root:insert(item) end Yup, I basically remove and reinsert every item every time they move. This works, but I'd like to optimize it a bit more; after all, most of the time, moving items still remain on the same quadTree node most of the iterations. Is there any standard way to deal with this kind of update? In case it helps, my code is here: http://github.com/kikito/passion/blob/master/ai/QuadTree.lua I'm not looking for someone to implement it for me; pointers to an existing working implementation (even in other languages) would suffice.

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  • Google Maps: How does Trulia create their custom InfoWIndows?

    - by NickT
    I really like how Trulia.com has created their custom Google Map InfoWindows. What I like in particular about Trulia's implementation of the InfoWindow is: Extends beyond the map border: Google Maps InfoWindows are contained within the map border whereas Trulia's seems to be able to float on-top of the map Always displays InfoWindow near map Center: Google Maps InfoWindows always display the InfoWindow above the marker whereas Trulia InfoWindows always display the InfoWindow as close the center of the map as possible. For example, if the map marker icon is on the top of the map near the border, the Trulia InfoWindow is displayed below the map marker icon InfoWindow is displayed on mouse hover (not 'click'): With the default Google Maps InfoWindow, you have to 'click' the map marker icon to display the InfoWindow whereas Trulia InfoWindows are display simply by hovering over the map marker icon. I found the PdMarker, which is a 3rd party extension for Google Map InfoWindows that accomplishes most of the above bullets but not all. 1) It does not extend beyond the map border, 2) it does not work with Google Maps API version 3 (only version 2). Anyone know how Trulia is accomplishing their InfoWindow-like implementation on Google Maps API v3?

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  • print web on dot matrix receipt printer

    - by nightingale2k1
    Hi, I need to print a receipt from my web based apps using dot matrix printer epson tm-u220d (pos printer). I need to know, should I generate the receipt in html or in plain text ? I ever saw some commands for dot matrix printer to change the font size, line feed etc .. but I don't remember that commands. if I have to use plain text I need to use that commands. anyone knows where i can get the references ? Thanks

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  • How do you energize yourself when working alone on a project?

    - by Stephane
    I am working in an environment with a very small team (3 developers only) and each of us have been assigned a different project, without counting support tasks. I know this is a bad business practice and that we should all work on a single project at a time, and then move on to the next one (Already explained to the management on how much it sucks). So don't answer me that we should work all together on one project at a time. Energizing the work when in a team is mostly pair programming we did that when less project were thrown at us and that was great. What I would like to know is how you energize your work when working alone on a project. Do you follow any particular practice?

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  • How have popular iPhone games been ported to Android?

    - by Cirrostratus
    I am not asking how could they have been, I want to know the real answer. Doodle Jump, Paper Toss and some others have versions on the iPhone and Android that are nearly exactly the same, with the iPhone version coming first. There is a small Objective-C compiler project for Android's NDK but the timing isn't right for these apps. There's also an Android port of Cocos2d but I doubt Doodle Jump used that. Titanium? Doubtful. As their respective code bases grow, I figure it'd get harder and harder to do an exact port from Objective-C to Java every release so I wonder if there is a better way. Are they sharing C++ code for example?

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  • What does this JavaScript error mean?

    - by Tommy
    Using the “Venkman” JavaScript debugger for Mozilla and getting the following error: XML Parsing Error: not well-formed Location: x-jsd:source?location=http%3A%2F%2F192.168.1.150%2Fscript.js&instance=337 Line Number 557, Column 50:<line><margin x='t'> - </margin><num> 554</num> ?? valid = false;</line> Functions works but I don't understand the error. Any help is appreciated. Thanks. function ValidateCheckBoxes() { var valid; $(document).ready(function(){ if($('input[@name=boxesA]:checked').size() == 0) {     valid = false; } else { valid = true; } }); return valid; }

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  • Best way to write a Safari Extension

    - by username
    What is the best way to write a Safari extension? I've written a couple XUL extensions for Firefox, and now I'd like to write versions of them for Safari. Is there a way that would allow you to add buttons or forms to the browser UI, since this is not possible with an Input manager or Service menu?

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  • Built in Analyzer in Xcode 3.1.4

    - by Mustafa
    Hi all, I wonder if the built in Analyzer in Xcode 3.1.4 makes it redundant to use LLVM/Clang Static Analyzer separately? Please refer to the original article here: Finding memory leaks with the LLVM/Clang Static Analyzer Thanks.

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  • How to get all paths in drupal install

    - by Aaron
    Hi, I need to write a module that gives me a page will all possible paths in a drupal install, including orphaned pages. (site map won't work for that). I can query the url_alias table for aliases, and I can query the menu_router table for all paths, even ones set in page/feed displays in views. But, variable paths (those with arguments) get interpreted at run-time. So, is there a way to get all possible paths in a drupal install, including dynamic paths and orphans? It's catch22. I have to know all the urls ahead of time to get them.

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  • How has RIA technology evolved and what technology stack currently rules this domain?

    - by Rachel
    I am new to RIA and have not been actively involved with this technology in my projects as we using server-side Java, but I want to gain some experience with RIA. My questions are: How has RIA technology evolved and in your opinion? What technology stack currently rules this domain? What are the recommended resources for learning RIA? In general what is the suggested approach for getting started on the RIA journey?

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  • Flex: Would a computational engine for a Connect-4 type game be too slow?

    - by Robusto
    OK, I was just fooling around in my spare time and have made this cool interface and game-playing code for a Connect-4 type game, written in Flex and playable by 2 human players in Flash. It accurately detects wins, etc. I'm smart enough to know that I've done the easy part. Before I dig into an AI for game play, I wanted to ask if this is the kind of thing that can really be handled computationally by a Flash plugin. It seems to me that for every turn up until the end there are 8 possible moves, 8 responses to each move, etc. So wouldn't a perfect engine have to be able to potentially see 8^8 moves (over 16 million), and a fairly good engine see up to a million? I don't know game coding so this is new to me. What's a reasonable move horizon for such a game to be able to see?

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  • Programming language for web

    - by cable729
    I haven't programmed in a while, and have kind of lost interest, but I want to get back, and I've enjoyed C# the most, a lot more than objective-c and visual basic. So I want to make some games that me and my friends will be able to play next school year. So basically something you can play on the web. What programming languages deploy to the web? If c# is possible, and a mac with safari/firefox would be able to use it (I can't install plugins, and I don't want to get in trouble for making myself admin again) Flash, Java, etc. If java does, I'd like that most since it's most like c#. Then what libraries/engines would I use? I want to do 2d. And then what IDE would I use? Thanks in advance!

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  • Link all'interno di un campo testo

    - by aleds
    Ciao a tutti, nella Rails app che sto realizzando, l'utente ha la possibilita' di inserire un post (campo memo) con all'interno una URL. Ad esempio: "bla bla bla bla www.blabla.com bla bla bla ..." Nel mostrare tale post vorrei che www.blabla.com diventasse un link cliccabile (come avviene in twitter). Ovviamente deve essere fatto un parsing della url, immagino usando le espressioni regolari. Avete dei consigli in merito ? Esiste qualcosa di gia' fatto oppure inizio da subito a scrivere il codice :) ? Grazie Alessandro DS http://alex-on-rails.blogspot.com/

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  • What Level of Education Is Most Useful?

    - by Steve Rowe
    If you were going to hire a programmer to work for/with you, what level of CS education would you prefer them to have and why? This assumes all other things are equal which, of course, they never are in real life. Self taught? Bachelor's? Masters? PHD? The important part of the answer is why, not the level. I'm looking for how important people think a Computer Science education really is and if one can go too far. A little clarification: To make things a little more even, assume you're hiring them without a lot of work experience. Obviously having a higher education is of less value the farther you are from graduation.

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  • Conceptual website designer ideas?

    - by Alex Tang
    Hi, I'm just wondering if anyone knows of any tool (apart from Visio) to generate visually nice looking website site maps or diagrams of a conceptual website. We're wanting to present some nice diagrams to our client but we're unsure about where to get started - we're all coders, not designers. Visio shapes or stencils are quite old. Just wondered what others in the industry are using!

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  • Regexp that matches user-agents of end-user browsers but NOT crawlers with >90 % accuracy

    - by knorv
    I'm trying to construct a regexp that will evaluate to true for User-Agent:s of "browsers navigated by humans", but false for bots. Needless to say the matching will not be exact, but if it gets things right in say 90 % of cases that is more than good enough. My approach so far is to target the User-Agent string of the the five major desktop browsers (MSIE, Firefox, Chrome, Safari, Opera). Specifically I want the regexp NOT to match if the user-agent is a bot (Googlebot, msnbot, etc.). Currently I'm using the following regexp which appears to achieve the desired precision: ^(Mozilla.*(Gecko|KHTML|MSIE|Presto|Trident)|Opera).*$ I've observed small number of false negatives which are mostly mobile browsers. The exceptions all match: (BlackBerry|HTC|LG|MOT|Nokia|NOKIAN|PLAYSTATION|PSP|SAMSUNG|SonyEricsson) My question is: Given the desired accuracy level, how would you improve the regexp? Can you think of any major false positives or false negatives to the given regexp? Please note that the question is specifically about regexp-based User-Agent matching. There are a bunch of other approaches to solving this problem, but those are out of the scope of this question.

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