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  • Caching generated QR Code

    - by Michal K
    I use zxing to encode a qr code and store it as a bitmap and then show it in ImageView. Since the image generation time is significant I'm planning to move it to a separate thread (AsyncTaskLoader will be fine I think). The problem is - it's an image and I know that to avoid memory leaks one should never store a strong reference to it in an Activity. So how would you do it? How to cache an image to survive config changes (phone rotation) and generally avoid generating it onCreate()? Just point me in the right direction, please.

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  • Write a function that returns the longest palindrome in a given string. e.g "ccddcc" in the string "

    - by Learner
    I thought of a solution but it runs in O(n^2) time Algo 1: Steps: Its a brute force method Have 2 for loops for i = 1 to i less than array.length -1 for j=i+1 to j less than array.length This way you can get substring of every possible combination from the array Have a palindrome function which checks if a string is palindrome so for every substring (i,j) call this function, if it is a palindrome store it in a string variable If you find next palindrome substring and if it is greater than the current one, replace it with current one. Finally your string variable will have the answer Issues: 1. This algo runs in O(n^2) time. Algo 2: Reverse the string and store it in diferent array Now find the largest matching substring between both the array But this too runs in O(n^2) time Can you guys think of an algo which runs in a better time. If possible O(n) time

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  • Storing UTF-8 XML using Word's CustomXMLPart or any other supported way

    - by wpfwannabe
    I am writing a Word add-in which is supposed to store some own XML data per document using Word object model and its CustomXMLPart. The problem I am now facing is the lack of IStream-like functionality for reading/writing XML to/from a CustomXMLPart. It only provides BSTR interface and I am puzzled how to handle UTF-8 XMLs with BSTRs. To my understanding an UTF-8 XML file should really never have to undergo this sort of Unicode conversion. I am not sure what to expect as a result here. Is there another way of using Word automation interfaces to store arbitrary custom information inside a DOCX file?

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  • How to have member variables and public methods in a jQuery plugin?

    - by user169867
    I'm trying to create a jQuery plugin that will create something like an autoCompleteBox but with custom features. How do I store member variables for each matching jQuery element? For example I'll need to store a timerID for each. I'd also like to store references to some of the DOM elements that make up the control. I'd like to be able to make a public method that works something like: $("#myCtrl").autoCompleteEx.addItem("1"); But in the implementation of addItem() how can I access the member variables for that particular object like its timerID or whatever? Below is what I have so far... Thanks for any help or suggestions! (function($) { //Attach this new method to jQuery $.fn.autoCompleteEx = function(options) { //Merge Given Options W/ Defaults, But Don't Alter Either var opts = $.extend({}, $.fn.autoCompleteEx.defaults, options); //Iterate over the current set of matched elements return this.each(function() { var acx = $(this); //Get JQuery Version Of Element (Should Be Div) //Give Div Correct Class & Add <ul> w/ input item to it acx.addClass("autoCompleteEx"); acx.html("<ul><li class=\"input\"><input type=\"text\"/></li></ul>"); //Grab Input As JQ Object var input = $("input", acx); //Wireup Div acx.click(function() { input.focus().val( input.val() ); }); //Wireup Input input.keydown(function(e) { var kc = e.keyCode; if(kc == 13) //Enter { } else if(kc == 27) //Esc { } else { //Resize TextArea To Input var width = 50 + (_txtArea.val().length*10); _txtArea.css("width", width+"px"); } }); }); //End Each JQ Element }; //End autoCompleteEx() //Private Functions function junk() { }; //Public Functions $.fn.autoCompleteEx.addItem = function(id,txt) { var x = this; var y = 0; }; //Default Settings $.fn.autoCompleteEx.defaults = { minChars: 2, delay: 300, maxItems: 1 }; //End Of Closure })(jQuery);

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  • Should we use NsMutableArray in CGRectIntersect ?

    - by srikanth rongali
    To know whether two sprites cross each other or not, should we use NSMutableArray to store the sprites ? In my game one fixed sprite(player) is there. And the other is a bullet fired and if this sprite intersects player sprite, then enemy won. I have used NSMutable Array to store the bullet sprites. If I do not use NSMutableArray then even though the the bullet intersects player it is not recognizing the intersection ? I am using ( (CGRectIntersectsRect(bulletRect, playerRect)). Thank You.

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  • NoSQL: How to retrieve a 'house' based on lat & long?

    - by Tedk
    I have a NoSQL system for storing real estate houses. One piece of information I have in my key-value store for each house is the longitude and latitude. If I wanted to retrieve all houses within a geo-lat/long box, like the SQL below: SELECT * from houses WHERE latitude IS BETWEEN xxx AND yyy AND longitude IS BETWEEN www AND zzz Question: How would I do this type of retrival with NoSQL ... using just a key-value store system? Even if I could do this with NoSQL, would it even be efficient or would simply going back to using a tradition database retrieve this type of information faster?

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  • So does Apple recommend to not use predicates and sort descriptors in an NSFetchRequest?

    - by dontWatchMyProfile
    From the docs: To summarize, though, if you execute a fetch directly, you should typically not add Objective-C-based predicates or sort descriptors to the fetch request. Instead you should apply these to the results of the fetch. If you use an array controller, you may need to subclass NSArrayController so you can have it not pass the sort descriptors to the persistent store and instead do the sorting after your data has been fetched. I don't get it. What's wrong with using them on fetch requests? Isn't it stupid to get back a whole big bunch of managed objects just to pick out a 1% of them in memory, leaving 99% garbage floating around? Isn't it much better to only fetch from the persistent store what you really need, in the order you need it? Probably I did get that wrong...

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  • Many to Many Association Tables - Is it customary to put additional columns in these tables?

    - by Randy Minder
    We've encountered the following situation in our database. We have table 'A' and table 'B' which have a M2M relationship. The association table is named 'AB' and contains a FK column to table 'A' and a FK column to table 'B'. Now we've identified a need to store additional data about this association. For example, a date when the association occurred, and who made the association etc. We've decided to put these additional columns in the 'AB' association table. However, something tells me this is frowned upon by database purists. On the other hand, it makes no sense to us to create yet an additional table to store this associated data. What's the prevailing thought on this?

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  • Storing i18n data in a database using XML

    - by TigrouMeow
    Hello, I may have to store some i18n-ed data in my database using XML if I don't fight back. That's not my choice, but it's in the specifications I have to follow. We would have, by example, something like following in a 'Country' column: <lang='fr'>Etats-Unis</lang> <lang='en'>United States</lang> This would apply to many columns in the database. I don't think it's a good idea at all. I tend to think that a cell in a database should represent a single piece of data (better for look-up), and that the database should have two dimensions maximum and not 3 or more (one request more would be required per dimension / a dimension here would be equal to the number of XML attributes). My idea was to have a separate table for all the translations, with columns such as : ID / Language / Translation. However, I should admit that I'm really not sure what is the best way to store data in various languages in a DB... Thanks for your advices :)

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  • Non Document Centric SharePoint Workflow

    - by Dan Revell
    SharePoint workflows are document centric in that the base thing the workflow runs on has to be a thing; be it a document or just a list item. The workflow itself is task based, so stuff a user has to do. Now I can put any sort of code in these tasks that I want to and even put complex InfoPath forms in for the user to perform the task. This has been fine on all my previous workflows. But what if I want the tasks to be actual official forms themselves. The item that the workflow runs on is just some abstract concept like an event. An example could be an accident has happened. There isn't an accident form, but a whole set of forms that need to be completed by different people. Task forms aren't really a nice way to go, because it locks all the forms into the task list. You can only access the forms by not deleting the tasks when complete and going to the workflow summery and following the task links to the InfoPath forms or going straight to the tasks list and doing a filter on particular "accidents". These are official documents so ideally there would be a library for each type of document and the workflow would orchestrate the completion of the right forms. It would mean each task would have to create a new blank form and then link the user to that form. The user would go complete the form but then have to go back to the task form and click yes I've completed it until the workflow could progress. Well this is short of the workflow monitoring the forms library form for some completion trigger. But then it all gets messy with the user experience from clicking the link in the task email, to open the Infopath task form, to clicking the link in the subsequent Infopath library form and then return through these forms on completion. It just gets messy trying to retrofit this non document centric sort of workflow into SharePoint. I would really appreciate any input on what might be the best way to do this. Store the forms as task forms Store the forms as library forms and create/link from the task forms Store the forms as different infopath views, and use a forms library. The workflow would trigger variables that progress the view the infopath form shows. Using the same form template for both task forms and a forms library and when a task form is complete, copy the xml into the forms library to have a official record outside of the workflow. Thanks

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  • Algorithm for Source Control System?

    - by Michael Stum
    I need to write a simple source control system and wonder what algorithm I would use for file differences? I don't want to look into existing source code due to license concerns. I need to have it licensed under MPL so I can't look at any of the existing systems like CVS or Mercurial as they are all GPL licensed. Just to give some background, I just need some really simple functions - binary files in a folder. no subfolders and every file behaves like it's own repository. No Metadata except for some permissions. Overall really simple stuff, my single concern really is how to store only the differences of a file from revision to revision without wasting too much space but also without being too inefficient (Maybe store a full version every X changes, a bit like Keyframes in Videos?)

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  • How do I include 2 tables in one LocalStorage item?

    - by Noor
    I've got a table that you can edit, and I've got a simple code saving that list when you're done with editing it. (the tables have the contenteditable on) The problem I've stumbled upon is that if I double click on enter, the table gets divided into two separate tables with the same ID. This causes the code I'm using to set the localStorage to only store one of the tables (I assume the first).. I've thought of different solutions and I wonder if someone could point out the pro's and con's (if the solutions even works that is). Make a loop that checks the page after tables and stores them into an array of localStorage-items.. I'd have to dynamically create a localStorage item for each table. Take the whole div that the tables are in, and store that in the localStorage, when a user revisits the page, the page checks after the items in storage and displays the whole divs. Any suggestions you have that can beat this :).. (but no cache, it has to be with the localStorage!) Thanks

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  • Boolean data type size and want to print its value?

    - by Vineet
    I want to know data data type of boolean , i used VSIZE() function but it is not working for boolean and Want to print and store boolean value into table. Please let me know how oracle store boolean value ,is there any other way to see data type and value for boolean variable. ERROR " expression is of wrong type" DECLARE a boolean; b number(7):=7; c number(2):=2; BEGIN a:=bc; select vsize(a) into b from dual; dbms_output.put_line(b); END;

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  • Ampersand in link description text?

    - by kitenski
    I am validating my site using validator.w3.org and have an issue where there is a & in my link description text. ie this is taken from the source <a class='tag' href='/php/iphone software.php?function=developer&amp;dev=witch%26wizards+inc.&amp;store=143441'>witch&wizards inc.</a> Which gives me this error in the validator Line 188, Column 540: cannot generate system identifier for general entity "wizards" …6wizards+inc.&store=143441'witch&wizards inc. If I urlencode the description then the validation passes, but the user then sees the text displayed urlencoded, ie Developer witch%26wizards+inc. However I believe it's much more user friendly if this was displayed unencoded, ie Developer witch&wizards inc. Is there a way to pass validation but still have user friendly text displayed? Thanks, Greg

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  • using core data with web services

    - by Jayshree
    Hi. i am a noob in xcode. I am developing an iphone app where i need to send and receive data from a web service. And i need to store them temporarily in my app. i dont want to use sqlite. so i was wondering if i should use core data for this purpose. I read some articles but i still dont have a clear picture of how to do it, coz i have used core data only with sqlite. I want to do the following things : Will receive table data from a web service. Have to perform certain calculations on those fields. Will send the data back in xml format to the server. How do i convert the xml data into int, date or any other data type? and how do i store it in managed data objects? Can anyone please help me with this??? thnx for your time.

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  • iPad book / cartoon contents plus Marvel like cartoons

    - by anthony
    Hi, I want to create and sell book / cartoons by individual episodes. What's the best way to to this? iBook from the apple store tends to sell by entire volume / book... I see an App from Marvel sells its contents by individual episodes, but I don't want to create / maintain shopping carts and stuff. (I am assuming iPad / iPhone users are downloading each cartoon episodes by their Marvel servers) I want to utilize Apple iBook / iTune store... Second questions: Is Marvel-like cartoons all jpg pictures showing frame by frame? Thanks in advance!!!

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  • Symbol info in .app file

    - by tech74
    Hi, i've recently released an app to the App store, i went to have a look at some crash logs in Organiser of my app downloaded from the app store and noticed that there is symbol info in my crash log - Shock Horror I definitely remember setting some strip symbols flags when i built the distribution build (which was copied from release) so can't for the life of me work out how there is this symbol info there. I never shipped a .SYM file to apple just the .app. So whats going on. Surely apple would have warned me about this wouldn't they??

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  • image with json and iphone

    - by alecnash
    Hi, I've got some images saved inside a db in a server and want to use them for my iphone. I created a php file so I can access them with json, got some questions though. I save all the text data from the db to a nsdictonary and it works fine. For the images should I use nsdata? Should I write a new php file for getting the image or is one enough because I am using an array to store my objects and then I use json_encode($arr) for json. Is it ok to store data to an array or is everything gonna crash?

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  • (php) how to properly 'save' info in forms completed thus far

    - by hatorade
    So i have a form that on paper is 40 pages long. I was going to take the natural sections of this form, and make separate html forms for each section, with the idea that on the first page there would be a first form, then you hit 'Continue to next section' which essentially is the 'submit' button, which moves the user to section two, etc, until they hit the last section. i am not actually storing the results of the form in a database, but rather sending an email. the idea then is to store the separate form answers (one html form per section in the real form) as arrays or objects in the session, so that if they go back to a section in the form, it repopulates the values they entered since they are stored in the session. the result would be an array in the session storing the results for each of my forms, and i have one form for each section. my question is: is it secure to temporarily store things like SSNs or driver's license numbers as session variables? why or why not?

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  • Maximum number of files one ext3 directory while still getting acceptable performance?

    - by knorv
    I have an application writing to an ext3 directory which over time has grown to roughly three million files. Needless to say, reading the file listing of this directory is unbearably slow. I don't blame ext3. The proper solution would have been to let the directory write to sub-directories such as ./a/b/c/abc.ext rather than just ./abc.ext. I'm changing to such a sub-directory structure and my question is simply: roughly how many files should I expect to store in one ext3 directory while still getting acceptable performance? Or in other words; assuming that I need to store three million files in the structure, how many levels deep should the ./a/b/c/abc.ext structure be? Obviously this is a question that cannot be answered exactly, but I'm looking for a ball park estimate.

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  • Best Pratice to Implement Secure Remember Me

    - by Yan Cheng CHEOK
    Sometimes, I came across certain web development framework which doesn't provide authentication feature as in Authenication ASP.NET I was wondering what is the security measure needs to be considered, when implementing "Remember Me" login feature, by hand coding? Here are the things I usually did. 1) Store the user name in cookie. The user name are not encrypted. 2) Store a secret key in cookie. The secret key is generated using one way function based on user name. The server will verify secret key against user name, to ensure this user name is not being changed. 3) Use HttpOnly in cookie. http://www.codinghorror.com/blog/2008/08/protecting-your-cookies-httponly.html Any things else I could miss out, which could possible lead a security hole.

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  • 'button_to' gives me an ugly URL!

    - by Tyler
    Im trying to get an 'add to cart' button to work. When I use <%= button_to "Add to Cart", :acton = "add_to_cart", :id = @product % and then click the button, I get a URL that puts the action after the ID, like this: 'http://localhost:3000/store/show/1?acton=add_to_cart.' The cart page does not load. What I need is a URL that looks like this: 'http://localhost:3000/store/add_to_cart/1'. I can get that result (and the cart to work) if I don't use 'button_to': <% form_for @product, :url = {:action = "add_to_cart", :id = @product} do |f| % <% end % But, what the heck? Why can't I use 'button_to'?

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  • itemdoubleclick event in ExtJS Charts

    - by Abdel Olakara
    Hi all, I got a strange issue today while working on ExtJS charts. I am trying to use some of the events for the chart when user clicks on the chart items. I found the following events are available: itemclick, itemdoubleclick, itemdrag, itemdragstart, itemdragend, itemmouseover, itemmouseout Here is my test chart where I have implemented all these events. Each event just create a list tag in my debuging console. The issue is, no matter what, itemdoubleclick do not get fired! what is the issue? Why is it not getting fired? xtype:'columnchart', width:600, height:350, id:'myChart', store: store, xField: 'month', yField: 'sales', listeners: { itemdoubleclick: function(o) { var dh = Ext.DomHelper; dh.append('consoleList', {tag: 'li', html: 'itemdoubleclick'}); } } In firebug console, I see that this event is registered. PS: In my code above, I have put only the event that is not working. Thanks in advance for your ideas and suggestions.

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  • Filter zipcodes by proximity in Django with the Spherical Law of Cosines

    - by spiffytech
    I'm trying to handle proximity search for a basic store locater in Django. Rather than haul PostGIS around with my app just so I can use GeoDjango's distance filter, I'd like to use the Spherical Law of Cosines distance formula in a model query. I'd like all of the calculations to be done in the database in one query, for efficiency. An example MySQL query from The Internet implementing the Spherical Law of Cosines like this: SELECT id, ( 3959 * acos( cos( radians(37) ) * cos( radians( lat ) ) * cos( radians( lng ) - radians(-122) ) + sin( radians(37) ) * sin( radians( lat ) ) ) ) AS distance FROM stores HAVING distance < 25 ORDER BY distance LIMIT 0 , 20; The query needs to reference the Zipcode ForeignKey for each store's lat/lng values. How can I make all of this work in a Django model query?

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