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  • What are deferred callbacks?

    - by tentimes
    I understand the idea of a callback, where I pass a function into another function and that function then uses the supplied function at will. I am struggling to understand deferred callbacks, even after googling it. Could someone provide a simple explanation please? I program in Ruby, but also know C/C++ a bit, but most of all I was a experienced assembly language programmer. So I am wondering is it a bit like a stack of callback addresses that get pop'd? I am hoping to learn jquery or node.js and these deferred callbacks seem integral to both. I understand basic threading principles (though mutex object makes my head hurt ;)

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  • If my URL's are static, but then parsed by Javascript, does that make it crawlable?

    - by Talasan Nicholson
    Lets say I have a link: <a href="/about/">About Us</a> But in Javascript [or jQuery] catches it and then adds the hash based off of the href attribute: $('a').click(function(e) { e.preventDefault(); // Extremely oversimplified.. window.location.hash = $(this).attr('href'); }); And then we use a hashchange event to do the general 'magic' of Ajax requests. This allows for the actual href to be seen by crawlers, but gives client-side users with JS enabled an ajax-based website. Does this 'help' the general SEO issues that come along with hashtags? I know hashbangs are 'ok', but afaik they aren't reliable?

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  • Using Minified Page Specific JS [migrated]

    - by Mike C
    I've been working on a rather large scale project which makes use of a number of different pages with some very specific Javascript for each of them. To lessen load times, I plan to minify it all in to one file before deploying. The problem is this: how should I avoid launching page specific JS on pages which don't require it? So far my best solution has been to wrap each page in some additional container <div id='some_page'> ...everything else... </div> and I extended jQuery so I can do something like this: // If this element exists when the DOM is ready, execute the function $('#some_page').ready(function() { ... }); Which, while kind of cool, just rubs me the wrong way.

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  • GPL question : web application using Imagick and GhostScript => Which would be the final licence?

    - by sdespont
    I am a bit confusing and I need your help to undertand my problem. I have developed a web application (PHP, JQuery) for one of my customer. Recently, my customer ask me to add a new feature permitting PDF to JPG conversion. After web browsing, I have discovered that iMagick (Apache licence) PHP extension with GhostScript (GPL licence) is the only solution. But, as my customer want to sell the web application to others companies, I have to use non-GPL licences. By the way, this feature is OPTIONAL and the final user must download and install manually iMagick and GhostScript if he his interesting by using the PDF conversion. Is there someone to tell me if the fact to use Imagick to convert PDF to JPG (and therefore use GhostScript) turns my current proprietary licence to GPL? And what about if I don't use Imagick but call GhostScript using PHP exec() function? Is there others non-GPL projects to convert PDF to JPG that I could use with PHP? Any help would be greatly appreciated.

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  • ASP.NET - Password Strength Indicator using jQuery and XML

    Last week, I had the opportunity to help implement and integrate a strong password policy into the legacy web application developed using ASP technology. The solution I proposed was to use jQuery to display the password strength meter to help users create strong passwords. One of my colleagues asked if we would have to modify multiple pages and files if the client decided to alter the password policy. The answer is no. Thanks to jQuery, the client-side script and code behind can share the same information. The password policy information is stored in an XML file and the client-side script and code behind are reading from this to perform the password strength validation.

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  • How to show history of edits for a post like StackExchange? [on hold]

    - by volume one
    Using: ColdFusion 10, JQuery, IIS 7.5 I'm creating a system where people can submit their text articles to me and I can apply edits/corrections and send it back to them. However I don't want to lose their original work. I want them to see where I made edits. StackExchange pretty much does what I want by showing when a post was edited and then you can see the history of changes. Can anyone please suggest how to go about doing this? Everytime an edit is made, it has to be written to the database. But how do I show what was edited? It could be 1 word in a whole paragraph... how would I highlight this? I just need some pointers if possible at what to think about and what to use if anyone has the time to help me out.

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  • NetAdvantage - jQuery, ASP .NET MVC and HTML5 UI Components released for Web Developers

    Built for speed and portability across operating systems, iPad/tablets, desktops and multi-browser support. Includes controls for ASP .NET MVC and uses the latest technologies like HTML 5 & CSS 3. This preview includes a sampling of powerful UI controls: grid, date picker, rating, editors, even a video player! All work with the popular WebKit engine that underpins many modern desktop browsers without requiring plug-ins or extensions. The grid embraces the latest Web techniques and frameworks like jQuery Client Templates and DOM virtualization. Download these essentials for jQuery and ASP .NET MVC from us today. span.fullpost {display:none;}

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  • Is it necessary to memorize codes?

    - by AAA
    I am a new developer, who just got hired at a big company. I don't know how but I guess they are desperate. However, I am well-versed with HTML5/CSS3 though things change and new things are released and I keep up with as much as I can. But this job required me to hand-code Javascript, know Jquery and Ajax. I have been exposed to this a bit but I am not sure if I can hand-code Javascript. My question is, is it necessary to memorize all there is about Javascript or are there a few key things that I should know how to hand-code because looking at javascript code it seems there are lots of lines code! Please point me in the right direction.

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  • Is it possible to force a tab/window to take focus without an alert()? [migrated]

    - by Chris Brandt
    I've been working to solve some form / session timeout issues on our site. I'd like to get the users attention BEFORE this happens so that they don't lose data that they've entered into long forms. I'm using jquery's .get to confirm with my server when the users session is set to timeout, and warn them 5 minutes before then. I've found that if I pop an alert(), it will bring the focus back to that tab / page -- but this seems 'heavy handed'. Is there a better way to do this?

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  • Is it necessary to memorize code?

    - by AAA
    I am a new developer, who just got hired at a big company. I don't know how but I guess they are desperate. However, I am well-versed with HTML5/CSS3 though things change and new things are released and I keep up with as much as I can. But this job required me to hand-code Javascript, know Jquery and Ajax. I have been exposed to this a bit but I am not sure if I can hand-code Javascript. My question is, is it necessary to memorize all there is about Javascript or are there a few key things that I should know how to hand-code because looking at javascript code it seems there are lots of lines code! Please point me in the right direction.

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  • When going for an interview for web development at an agency, can a real example be expected?

    - by KPO
    I just started coding a year ago. By "coding" I mean HTML(5), CSS(3), and only a few times I implemented AJAX and JavaScript. I am interviewing for a position that expects me to know HTML, CSS, JS, JQuery, and AJAX. I am good with HTML5/CSS3 and somewhat ok with js. If I go for an interview, will they expect me to write code during the interview? I do have a live website as an example and snapshots of past projects that I sent to them. I am a little nervous, so any tips or something from your experience I can learn will be helpful.

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  • Capture text typed by user on website and allow user to email a link to someone else so that they can view the message [on hold]

    - by Dano007
    Using the following html, css,jquery, js, what would be the best approach to achieving this. A visitor hits the website. The website page is displaying html and a css3 animation. The visitor is given the option to enter text freely into a text box, they enter an email address and hit send. The person receiving the message gets an email with a link, when they click the link it takes them to the webpage with the animation and the custom message their friend entered. Is this easy to achieve, what would be the best approach? anyone know of existing code I could use? Thanks

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  • Information system using JQuery [on hold]

    - by user105300
    I would like to develop an information system for a school which will provide a single integrated source of information about any student who studies there. A full student profile will be built up year-by-year, as each student progresses through a degree program from their first point of contact with the university. Which type of JQuery should I use ? Which aspect or feature of it would be useful ? Also, which layer of the three-tier architecture does JQuery belong to ? It would be great if you could help me. Thank you.

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  • T-SQL: Compute Subtotals For A Range Of Rows

    - by John Dibling
    MSSQL 2008. I am trying to construct a SQL statement which returns the total of column B for all rows where column A is between 2 known ranges. The range is a sliding window, and should be recomputed as it might be using a loop. Here is an example of what I'm trying to do, much simplified from my actual problem. Suppose I have this data: table: Test Year Sales ----------- ----------- 2000 200 2001 200 2002 200 2003 200 2004 200 2005 200 2006 200 2007 200 2008 200 2009 200 2010 200 2011 200 2012 200 2013 200 2014 200 2015 200 2016 200 2017 200 2018 200 2019 200 I want to construct a query which returns 1 row for every decade in the above table, like this: Desired Results: DecadeEnd TotalSales --------- ---------- 2009 2000 2010 2000 Where the first row is all the sales for the years 2000-2009, the second for years 2010-2019. The DecadeEnd is a sliding window that moves forward by a set ammount for each row in the result set. To illustrate, here is one way I can accomplish this using a loop: declare @startYear int set @startYear = (select top(1) [Year] from Test order by [Year] asc) declare @endYear int set @endYear = (select top(1) [Year] from Test order by [Year] desc) select @startYear, @endYear create table DecadeSummary (DecadeEnd int, TtlSales int) declare @i int -- first decade ends 9 years after the first data point set @i = (@startYear + 9) while @i <= @endYear begin declare @ttlSalesThisDecade int set @ttlSalesThisDecade = (select SUM(Sales) from Test where(Year <= @i and Year >= (@i-9))) insert into DecadeSummary values(@i, @ttlSalesThisDecade) set @i = (@i + 9) end select * from DecadeSummary This returns the data I want: DecadeEnd TtlSales ----------- ----------- 2009 2000 2018 2000 But it is very inefficient. How can I construct such a query?

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  • Silverlight MergedDictionary - Attribute Value out of Range

    - by Wonko the Sane
    Hello All, I have a Silverlight-3 solution that contains a few different projects. I want to have one "common" project for holding controls and resources that will be used by multiple other projects. Within the common project, there is a folder called Resources, which holds a ResourceDictionary (CommonColors.xaml). This is set to be built as a Resource, Do Not Copy. I add a reference to the common project in another project (call it UncommonControls), and attempt to add the ResourceDictionary as a MergedDictionary: <UserControl.Resources> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="/Common;component/Resources/CommonColors.xaml" /> <ResourceDictionary Source="/UncommonControls;component/Resources/UncommonStyles.xaml" /> </ResourceDictionary.MergedDictionaries> </ResourceDictionary> </UserControl.Resources> When I try to run, I get an exception: Attribute /Common;component/Resources/CommonColors.xaml value is out of range. [Line: 14 Position: 44] --- Inner Exception --- The given key was not present in the dictionary. However, if I reference a ResourceDictionary local to Uncommon (such as the UncommonStyles.xaml, above) project, which is set up with the same Build properties, it works fine. I haven't seen anything that says SL3 can't reference an external ResourceDictionary (on the contrary, I've seen an example of using one, albeit with no downloadable project to verify the behavior). Thanks, Wonko

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  • I am getting a Radix out of range exception on performing decryption

    - by user3672391
    I am generating a keypair and converting one of the same into string which later is inserted into the database using the following code: KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA"); keyGen.initialize(2048); KeyPair generatedKeyPair = keyGen.genKeyPair(); PublicKey pubkey = generatedKeyPair.getPublic(); PrivateKey prvkey = generatedKeyPair.getPrivate(); System.out.println("My Public Key>>>>>>>>>>>"+pubkey); System.out.println("My Private Key>>>>>>>>>>>"+prvkey); String keyAsString = new BigInteger(prvkey.getEncoded()).toString(64); I then retrieve the string from the database and convert it back to the original key using the following code (where rst is my ResultSet): String keyAsString = rst.getString("privateKey").toString(); byte[] bytes = new BigInteger(keyAsString, 64).toByteArray(); //byte k[] = "HignDlPs".getBytes(); PKCS8EncodedKeySpec encodedKeySpec = new PKCS8EncodedKeySpec(bytes); KeyFactory rsaKeyFac = KeyFactory.getInstance("RSA"); PrivateKey privKey = rsaKeyFac.generatePrivate(encodedKeySpec); On using the privKey for RSA decryption, I get the following exception java.lang.NumberFormatException: Radix out of range at java.math.BigInteger.<init>(BigInteger.java:294) at com.util.SimpleFTPClient.downloadFile(SimpleFTPClient.java:176) at com.Action.FileDownload.processRequest(FileDownload.java:64) at com.Action.FileDownload.doGet(FileDownload.java:94) Please guide.

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  • LINQ - How to query a range of effective dates that only has start dates

    - by itchi
    I'm using C# 3.5 and EntityFramework. I have a list of items in the database that contain interest rates. Unfortunately this list only contains the Effective Start Date. I need to query this list for all items within a range. However, I can't see a way to do this without querying the database twice. (Although I'm wondering if delayed execution with EntityFramework is making only one call.) Regardless, I'm wondering if I can do this without using my context twice. internal IQueryable<Interest> GetInterests(DateTime startDate, DateTime endDate) { var FirstDate = Context.All().Where(x => x.START_DATE < startDate).Max(x => x.START_DATE); IQueryable<Interest> listOfItems = Context.All().Where(x => x.START_DATE >= FirstDate && x.START_DATE <= endDate); return listOfItems; }

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