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• business object and codelist

  - by feiroox

  Hi How to design a business object? I have a library which returns me an Object which have ten lists of other different objects. I need to store it into database all. List of objects are often like: class Item { private int id; private String name; private double point; } But the name is often the same. Like basic title of the product or code. Containing from 3 characters up to 70characters. Should I make conversion for every Object to: (or something similar) class ConvertedItem { private int id; private int code; private double point; } And have a separated table of codes ( I guess around 60). Or do not bother with duplicated stuff? It's not mission critical app. What would you do in my case? thanks in advance

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• Catching "NullPointerExceptions" in JavaScript

  - by Lenni

  I'm writing quite a bit of code in Prototype.js which returns null if a DOM-id wasn't found. $("someId").show(); If someId doesn't exist, a method will be called on null, which halts the entire program, in effect disabling all JS effects after the error. I could just check for null before executing such a statement, but this is getting tiring. I would like to catch an exception but I'm not sure which one its is. MDC lists the following ECMA Script error types: * Error * EvalError * RangeError * ReferenceError * SyntaxError * TypeError * URIError * DOMException * EventException * RangeException Also, do browsers have a unified way of dealing with a method call on null?

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• Twitter oauth/request_token failing sometimes

  - by Techpriester

  Hello there. I'm implementing Twitters OAuth for Adobe AIR in Javascript. My problem is, that out of 100 requests to api.twitter.com/oauth/request_token about 30 fail with the usual error message: Failed to validate oauth signature and token The other 70% of requests produce a correct response, so I believe that my algorithm for signing is correct. I've read about invalid timestamps in a lot of forums and mailing lists but that is not the problem. My timestamps are correct. I also checked, if the nonces are unique, so that's not the cause either. Any ideas why this is happening?

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• jQuery Optimizations

  - by aepheus

  I've just come to the end of a large development project. We were on a tight timeline, so a lot of optimization was "deferred". Now that we met our deadline, we're going back and trying to optimize things. My questions is this: What are some of the most important things you look for when optimizing jQuery web sites. Alternately I'd love to hear of sites/lists that have particularly good advise for optimizing jQuery. I've already read a few articles, http://www.tvidesign.co.uk/blog/improve-your-jquery-25-excellent-tips.aspx was an especially good read.

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• Tableview with sections managed by fetched results controller

  - by Matthes

  Hi, I'm quite new to CoreData and need help with one issue. I have tableview which simply lists cities stored in SQLite db. City is defined by "cityId" and "name" attributes. Data are fetched using NSFetchedResultsController and everything works fine except that I can't figure out how to make FetchedResultsController to group cities by first letter of city names. When I supply "name" for sectionNameKeyPath argument of initWithFetchRequest:managedObjectContext:sectionNameKeyPath:cacheName: method, it creates section for each city, which is obviously something I don't want. I can't figure out how to create an expression which would make it work in way I need. thanks for any tips and/or advices on this Matthes

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• Use of date function in PHP to output a user-friendly date

  - by Jamie

  I have a MySQL database column named DateAdded. I'd like to echo this as a readable date/time. Here is a simplified version of the code I currently have: $result = mysql_query(" SELECT ListItem, DateAdded FROM lists WHERE UserID = '" . $currentid . "' "); while($row = mysql_fetch_array($result)) { // Make the date look nicer $dateadded = date('d-m-Y',$row['DateAdded']); echo $row['ListItem'] . ","; echo $dateadded; echo "<br />"; } Is the use of the date function the best way to output a user-friendly date? Thanks for taking a look,

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• Is it possible / recommendable sending HTML emails containing Javascript?

  - by Adriano Varoli Piazza

  This is mostly a rhetorical question, as far as I've checked the answer is 'don't even bother', but I wanted to be really sure. We have an email app, where you can send email to lists of subscribers. This is not spam: it's used, for example, by an university to send communications to its students, by a museum to send emails to subscribers, etc. Recently, I was asked by a prospective client if it was possible to send html messages containing javascript without being marked as spam. Not knowing, I did a short trip of the webs and what I've got is (percentages out of my posterior) 'half the clients won't display properly', 'half the clients will flag you as spam' and 'half the clients will have blocked javascript altogether' (There's clearly some superposition). So the best solution seems to be adding a link to a proper page if really necessary. Have you got a different experience? Do you know of any email-merge solution that provides this feature? Do you know if specific clients accept it or refuse to display html with javascript?

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• python - from matrix to dictionary in single line

  - by Sanich

  matrix is a list of lists. I've to return a dictionary of the form {i:(l1[i],l2[i],...,lm[i])} Where the key i is matched with a tuple the i'th elements from each list. Say matrix=[[1,2,3,4],[9,8,7,6],[4,8,2,6]] so the line: >>> dict([(i,tuple(matrix[k][i] for k in xrange(len(matrix)))) for i in xrange(len(matrix[0]))]) does the job pretty well and outputs: {0: (1, 9, 4), 1: (2, 8, 8), 2: (3, 7, 2), 3: (4, 6, 6)} but fails if the matrix is empty: matrix=[]. The output should be: {} How can i deal with this?

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• How to make pdb recognize that the source has changed between runs?

  - by user88028

  From what I can tell, pdb does not recognize when the source code has changed between "runs". That is, if I'm debugging, notice a bug, fix that bug, and rerun the program in pdb (i.e. without exiting pdb), pdb will not recompile the code. I'll still be debugging the old version of the code, even if pdb lists the new source code. So, does pdb not update the compiled code as the source changes? If not, is there a way to make it do so? I'd like to be able to stay in a single pdb session in order to keep my breakpoints and such. FWIW, gdb will notice when the program it's debugging changes underneath it, though only on a restart of that program. This is the behavior I'm trying to replicate in pdb.

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• Haskell. Numbers in binary numbers. words

  - by Katja

  Hi! I need to code words into binary numbers. IN: "BCD..." OUT:1011... I have written already funktion for coding characters into siple numbers IN: 'C' OUT: 3 IN: 'c' OUT: 3 lett2num :: Char -> Int lett2num x | (ord 'A' <= ord x) && (ord x <= ord 'Z') = (ord x - ord 'A') + 1 | (ord 'a' <= ord x) && (ord x <= ord 'z') = (ord x - ord 'a') +1 num2lett :: Int -> Char num2lett n | (n <= ord 'A') && (n <= ord 'Z') = chr(ord 'A'+ n - 1) | (n <= ord 'a') && (n <= ord 'Z') = chr(ord 'A'+ n - 1) I wrote as well function for codind simple numbers into binary. num2bin :: Int->[Int] num2bin 0 = [] num2bin n | n>=0 = n `mod` 2 : (num2bin( n `div` 2)) | otherwise = error but I donw want those binary numbers to be in a list how can I get rid of the lists? Thanks

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• File listing with ActiveX

  - by Studer

  I need to program a simple Windows Explorer that only lists all files inside a folder recursively. The only solution I found up to now is using an ActiveX controller. So, I installed Visual Studio 2010, but I don't know really how to use it to make an ActiveX. I tried to create a Class Library then add a Explorer module. It compiles, but I don't know what to do now. Is there an easier way to do this or am I missing something ?

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• Markdown to text/plain and text/html for multipart email

  - by fphilipe

  I’m looking for a solution to send DRY multipart emails in Rails. With DRY I mean that the content for the mail is only defined once. I’ve thought about some possible solutions but haven’t found any existing implementations. The solutions I’ve thought about are: load the text from I18n and apply Markdown for the html mail and apply Markdown with a special output type for the text mail where links are put in parenthesis after the link text bold, italic and other formatting that doesn't make sense are removed ordered and unordered lists are maintained generate only the html mail and convert that to text according to the above conditions Is there any available solution out there? Which one is probably the better way to do it?

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• Best way to globally set every control's ValidationGroup property in an asp.net?

  - by Steve Flook

  I have a User Control with form items that is re-used considerably throughout a large web application, and up until this point the validation summary upon an invalid form submission is being handled by the .aspx that consumes the User Control. Now I need to set the ValidationGroup property at runtime for each of my form items controls (textboxes, lists, validators, etc). Rather than do it manually by setting each control I'm interested in iterating through all the controls in the User Control, detecting if that control has a ValidationGroup property, and setting it's value that way. Something like this: For Each ctrl As System.Web.UI.Control In Me.Controls ' so now what is the proper way to detect if this control has the ValidationGroup property Next Code sample in vb.net or c# works for me. Many thanks!

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• Flex Problem Enabling and Disabling Button in List

  - by pfunc

  I have a list with a dataprovider, it lists out buttons encapsulated in an item renderer. All I want it to do is have a skin that it changes to when it is clicked. I can get this to happen, but then it just goes back to its up state. I want it to stick on the down state, which I have to do by disabling the button. So I tried this: buttonList.selectedItem.enabled = false; for(var i:Number = 0; i< buttonList.numChildren; i++) { var loopBtn = buttonList.getChildAt(i); if(loopBtn != buttonList.selectedItem) { loopBtn.enabled = true; } } But this doesn't seem to work. What am I doing wrong here?

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• How can I restore the order of an (incomplete) select list to its original order?

  - by Rob

  I have two Select lists, between which you can move selected options. You can also move options up and down in the right list. When I move options back over to the left list, I would like them to retain their original position in the list order, even if the list is missing some original options. This is solely for the purpose of making the list more convenient for the user. I am currently defining an array with the original Select list onload. What would be the best way to implement this?

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• jquery reset conditional filter

  - by VictorS

  I have 2 dropdown lists on my webform and using jquery trying to filter/reset filter 2nd dropdown elements based on 1st dropdown selection. $(document).ready(function() { $('#dropdown1').change(function(e) { switch ($(this).val()) { case "4": //this removal works $('#dropdown2').filter(function() { return ($(this).val() == 16); }).remove(); break; ................. default: //how would I restore filter here? } } }); Removing part works, so it filters item with no problem, but I have difficulty restoring the filter on dropdown 2 if something else is chosen in dropdown 1. I was trying to use .hide() and .show() instead of .remove() but it doesn't seem to work on IE6 at least.

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• Legality Of Re-Implementing An Existing API (e.g. GNU implementing the UNIX APIs)

  - by splicer

  I've often wondered about this. I'm not looking for legal advice, just casual opinions ;) If some company publishes an API on the web for their closed-source library, would it be legal for another party to release an open-source implementation of that API? Are function declarations considered source code? Take GNU implementing the UNIX APIs, for example. The UNIX standard gives the following function declaration and defines its required behaviour in English: char * mktemp(char *template); Now, consider an API that lists and declares and describes several thousand (more much complex) functions, enums, etc.; an API which defines a solution to a non-trival set of problems. If an open-source project publishes C headers that copy (verbatim) the function definitions contained in the closed-source company's published API, doesn't that violate some sort copyright law?

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• Algorithm to find the smallest snippet from searching a document?

  - by deliciousirony

  I've been going through Skiena's excellent "The Algorithm Design Manual" and got hung up on one of the exercises. The question is: "Given a search string of three words, find the smallest snippet of the document that contains all three of the search words—i.e. , the snippet with smallest number of words in it. You are given the index positions where these words in occur search strings, such as word1: (1, 4, 5), word2: (4, 9, 10), and word3: (5, 6, 15). Each of the lists are in sorted order, as above." Anything I come up with is O(n^2)... This question is in the "Sorting and Searching" chapter, so I assume there is a simple and clever way to do it. I'm trying something with graphs right now, but that seems like overkill. Ideas? Thanks

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• Creating Filter for my Associated View

  - by Hooman

  Senario: Open an account in CRM 2011 beta and click on activities on the left navigation pane, you will now see activities of the selected account and now have two filter drop down lists on the top which allow you to view activities of the account or sub accounts of this account. Is this filter drop downs something customizable or is it a feature only available for system entities (like acitivity)? Is this functionality provided because Activity entity have N:1 relationship with Type of Behavior = System? can we provide the same or similar functionality by using Type of behavior = Parental!?!? Thx

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• Ruby - Manipulating Time/DateTime by the Hour/Day?

  - by viatropos

  Where can I find some examples on how to manipulate the time objects by days/hours/etc? I would like to do this: time.now_by_hour #=> "Tue Jun 15 23 MST 2010" time.now_by_day #=> ""Tue Jun 15 MST 2010" time.now_by_hour - 4.weeks - 3.days #=> "Sat May 15 MST 2010" What is the recommended order of operations? The reason for this is I would like to run through lists of times and sort them by date to the hour, not to the minute and second.

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• Python - from file to data structure?

  - by Seafoid

  Hi, I have large file comprising ~100,000 lines. Each line corresponds to a cluster and each entry within each line is a reference i.d. for another file (protein structure in this case), e.g. 1hgn 1dju 3nmj 8kfn 9opu 7gfb 4bui I need to read in the file as a list of lists where each line is a sublist, thus preserving the integrity of the cluster, e.g. nested_list = [['1hgn', '1dju', '3nmj', '8kfn'], ['9opu', '7gfb'], ['4bui']] My current code creates a nested list but the entries within each list are a single string and not comma separated. Therefore, I cannot splice the list with indices so easily. Any help greatly appreciated. Thanks, S :-)

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• Adding Postgres table cells based on same value

  - by russell kinch

  I have a table called expenses. There are numerous columns but the ones involved in my php page are date, spplierinv, amount. I have created a page that lists all the expenses in a given month and totals it at the end. However, each row has a value, but many rows might be on the same supplier invoice.This means adding each row with the same supplierinv to get a total as per my bank statement. Is there anyway I can get a total for the rows based on the supplierinv. I mean say I have 10 rows. 5 on supplierinv 4, two on supplierinv 5 and 3 on supplierinv 12, how can a get 3 figures (inv 4, 5 and 12) and the grand total at the bottom. Many thanks

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• How Do You Parse Column Data ?

  - by discwiz

  I am trying to parse a file generated by LGA Tracon that lists the position data for aircraft over a given time frame. The data of interest starts with TRACKING DATA and ends with SST and there are thousands of entries per file. The system generating the file, Common ARTS, is very rigid in its formatting and we can expect the column spacing to be consistent. Any help would be greatly appreciated. Thanks, Here is an image to preserve the exact formatting Here is a reduced text file. link text

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• Override jQuery style value

  - by MrAwesome

  Hi To resolve a jQuery slideDown/Up problem, I had to change one line in the jQuery file. I changed line 5738 from this.elem.style.display = "block"; to this.elem.style.display = "inline-block"; The block attribute messed up my lists when using slideDown/Up/Toggle. slideDown changes my list from display:inline to display:block during execution, and then back to display: inline again. It would be much better if it was inline (or inline-block) all the way. Is there a way to override the value stated above from my html page, or do I have to stick with my modified jQuery file? It would be nice if I could override the style attribute only when I perform $('.gallery_container li:gt(4)').slideToggle(); Here's the code: http://90.230.237.71/gandhi.html

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• Any reccomendations for implementing a user-defined workflow in Ruby?

  - by midas06

  I'm interested in creating a system where the user can define the steps in a workflow. Is there a gem that already handles this? I thought about one of the state machine gems, but they all seem to be for pre-defined states. I've been thinking maybe i can use state machine for the individual step types... An email step could have a few states [New, Assigned, Done], and the workflow could just be lists of these stateful steps. Are there other solutions out there?

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