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• iPhone: Custom UITableViewCell with multiple areas that respond to taps?

  - by Nick

  I've been asked to create a custom UITableViewCell with multiple areas that can be tapped. These areas won't have buttons or any graphics - they'll be invisible. 3 different methods will be called depending on which third of the cell the user taps i.e. || decrementFooCount || viewFooDetails || incrementFooCount || The cell has a few labels on it that need to be visible at all times - the fooName and fooCount. I'm thinking perhaps three hidden UIButtons over the cell? I also need to maintain the swipe to delete default behavior.

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• Using reshape + cast to aggregate over multiple columns

  - by DamonJW

  In R, I have a data frame with columns for Seat (factor), Party (factor) and Votes (numeric). I want to create a summary data frame with columns for Seat, Winning party, and Vote share. For example, from the data frame df <- data.frame(party=rep(c('Lab','C','LD'),times=4), votes=c(1,12,2,11,3,10,4,9,5,8,6,15), seat=rep(c('A','B','C','D'),each=3)) I want to get the output seat winner voteshare 1 A C 0.8000000 2 B Lab 0.4583333 3 C C 0.5000000 4 D LD 0.5172414 I can figure out how to achieve this. But I'm sure there must be a better way, probably a cunning one-liner using Hadley Wickham's reshape package. Any suggestions? For what it's worth, my solution uses a function from my package djwutils_2.10.zip and is invoked as follows. But there are all sorts of special cases it doesn't deal with, so I'd rather rely on someone else's code. aggregateList(df, by=list(seat=seat), FUN=list(winner=function(x) x$party[which.max(x$votes)], voteshare=function(x) max(x$votes)/sum(x$votes)))

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• jQuery AJAX & Multiple sp Result Sets

  - by Kevin

  Is it possible to use a stored procedure that returns multiple result sets in json format and process them as part of one request using ajax calls in jquery? In other words, I have a stored procedure that returns several result sets that are to be used with a series of select boxes that are all being filtered by the same criteria. If any of the select boxes is chosen that value is then passed to the stored procedure and all the subsequent select box updates reflect only results that match the filtered criteria. I don't want to have to call the same sp multiple times to process the results and was trying not to create multiple queries, so I'm wondering if it's possible to store more than one json result in a single request and then store and process them on the client side.

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• rcurl web scraping timeout exits program

  - by user1742368

  I am using a loop and rcurl scrape data from multiple pages which seems to work fine at certain times but fails when there is a timeout due to the server not responding. I am using a timeout=30 which traps the timeout error however the program stops after the timeout. i would like the progrm to continue to the next page when the timeout occurrs but cant figureout how to do this? url = getCurlHandle(cookiefile = "", verbose = TRUE) Here is the statement I am using that causes the timeout. I am happy to share the code if there is interest. webpage = getURLContent(url, followlocation=TRUE, curl = curl,.opts=list( verbose = TRUE, timeout=90, maxredirs = 2)) woodwardjj

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• [Ruby] How can I randomly iterate through a large Range?

  - by void

  I would like to randomly iterate through a range. Each value will be visited only once and all values will eventually be visited. For example: (0..9).sort_by{rand}.map{|x| f(x)} where f(x) is some function that operates on each value. A Fisher-Yates shuffle could be used to increase efficiency, but this code is sufficient for many purposes. My problem is that sort_by will transform the range into an array, which is not cool because I am working with astronomically large numbers. Ruby will quickly consume a large amount of RAM trying to create a monstrous array. This is also why the following code will not work: tried = {} # store previous attempts bigint = 99**99 bigint.times { x = rand(bigint) redo if tried[x] tried[x] = true f(x) # some function } This code is very naive and quickly runs out of memory as tried obtains more entries. What sort of algorithm can accomplish what I am trying to do?

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• How can I find out the original username a process was started with?

  - by szabgab

  There is a perl script that needs to run as root but the we must make sure the user who runs the script did not log-in originally as user foo as it will be removed during the script. So how can I find out if the user, who might have su-ed several times since she logged in has not impersonated 'foo' at any time in that chain? I found an interesting perl script that was calling the following two shell scripts, but I think that would only work on Solaris. my $shell_paren = `ps -ef | grep -v grep | awk \'{print \$2\" \"\$3}\' | egrep \"^@_\" | awk \'{print \$2}'`; my $parent_owner = `ps -ef | grep -v grep | awk \'{print \$1\" \"\$2}\' | grep @_ | awk \'{print \$1}\'`; This needs to work on both Linux and Solaris and I'd rather eliminate the repeated calls to he the shell and keep the whole thing in Perl.

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• Mono 2.10.5 Runtime error on Ubuntu 11.10

  - by johnluetke

  I've install mono-runtime via apt in order to run my Mono console application on Ubuntu via SSH. However, when I run the command mono myapp.exe, It exits, with no message, and my program does nothing. If I throw the -v switch to Mono, such as mono -v myapp.exe, I get about 10k lines of output (as expected, -v is verbose), with the first few lines being: converting method System.OutOfMemoryException:.ctor (string) Method System.OutOfMemoryException:.ctor (string) emitted at 0xb7052c28 to 0xb7052c4b (code length 35) [myapp.exe] converting method (wrapper runtime-invoke) <Module>:runtime_invoke_void__this___object (object,intptr,intptr,intptr) Method (wrapper runtime-invoke) <Module>:runtime_invoke_void__this___object (object,intptr,intptr,intptr) emitted at 0xb7052c68 to 0xb7052cf6 (code length 142) [myapp.exe] converting method System.SystemException:.ctor (string) I read this as the runtime throwing an OutOfMemory exception, but the machine is under no intense load, has plenty of available RAM, and is running nothing other that system processes. I've removed and reinstalled Mono countless times, and have even run the executable on other machines perfectly fine. Am I missing something completely obvious here?

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• Ray intersection and child camera

  - by lutangar

  I've been playing with three.js for few weeks now and got few inconsistencies on ray casting. Here is a simplified version demonstrating one of the bug I encoutered : http://jsfiddle.net/eMrhb/12/ The camera is added to the sphere mesh for further use of TrackBallControl for example. scene.add(mesh); mesh.add(camera); Clicking a few times on the sphere and opening the console, show us none of the expected intersections between the ray and the mesh. Adding the camera to the scene (http://jsfiddle.net/eMrhb/9/), solves the problem: scene.add(mesh); scene.add(camera); But I could use a much more complex hierarchy between my scene objects and the camera to suit my needs. Is this a limitation? If it is, is there any workarounds I could use?

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• What is so great about STL?

  - by Zygrob

  Hello StackOverflow. I am a Java developer trying to learn C++. I have many times read over the web (including StackOverflow) that STL is the best collections library that you can get in *any* language. (Sorry, I do not have any citations atm) However after studying some STL, I am really failing to see what makes STL so special. Would you please shed some light on what sets STL apart from the collection libraries of other languages and make it the _best_ collection library? Thanks in advance, Zygr??b.

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• folder structure for project documentation

  - by Qiulang

  Hi all, I saw some questions raised about the folder structure of source codes, but I never see the question about folder structure of project documentation. I googled it and still do not see many articles talk about. Here is one http://www.projectperfect.com.au/downloads/Info/info_project_folder_structure.pdf To quote some of its words: "There are two broad approaches: Organize by phase so that each top directory is a phase. For example, you might have directories for Feasibility, Business Analysis, Design etc. or whatever your phases are called. Organize by function so that the top directory level are functions. For example, Risks, Requirements, Scope, Change Control, Development. Most times a mix of both are used..." So any thought about it? I believe this is also an important issue!

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• SQL query to get field value distribution

  - by Bryan Lewis

  I have a table of over 1 million test score records that basically have a unique score_ID, a subject_ID and a score given by a person. The score range for most subjects is 0-3, but some have a range of 0-4. There are about 25 possible subjects. I need to produce a score distribution report which looks like: subject_ID 0 1 2 3 4 ---------- --- --- --- --- --- 1 967 576 856 234 2 576 947 847 987 324 . . So it groups the data by subject_ID, then shows how many times a specific score value was given within that subject. Any SQL pointers to generate this would be greatly appreciated.

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• using a test account for in app purchases??

  - by hemant

  i created in app purchases in my application.But still my test account doesn’t work fine. When i test my application using test account the sandbox environment asks me to buy the product and after buying it asks me to buy the product again straightaway. Is it some problem while using test accounts or is there a problem in my coding?? this is my first application and figuring out in app purchases for your application can be really hard at times. i have 4 products and this happens only with 1 or 2 products and rest work fine. So i am sure the in app purchases is fine but cant figure out what could be wrong??

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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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• Disable Link while animated Basket

  - by Dante

  Hi, I'm using this script for my online shopping basket: http://www.webresourcesdepot.com/fly-to-basket-effect-with-jquery/. Like people suggest in the comments it's easy buggy when you click multiple times on the same image. How can I disable the img link when it's clicked once and re-enable it when the product is added to the basket? I've tried setting the attribute HREF of to # in the beginning of the function, but that doesn't help. So when a user clicks the function needs to be executed, but the link should be disabled as long as the function is busy. thanks in advance for your help.

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• Can someone help with big O notation?

  - by Dann

  void printScientificNotation(double value, int powerOfTen) { if (value >= 1.0 && value < 10.0) { System.out.println(value + " x 10^" + powerOfTen); } else if (value < 1.0) { printScientificNotation(value * 10, powerOfTen - 1); } else // value >= 10.0 { printScientificNotation(value / 10, powerOfTen + 1); } } I understand how the method goes but I cannot figure out a way to represent the method. For example, if value was 0.00000009 or 9e-8, the method will call on printScientificNotation(value * 10, powerOfTen - 1); eight times and System.out.println(value + " x 10^" + powerOfTen); once. So the it is called recursively by the exponent for e. But how do I represent this by big O notation? Thanks!

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• Can Wordpress Duplicate An Entire Page Structure?

  - by rob walsh

  I have a wordpress site that i've been working on that has some pages (as in NOT posts) that a client changes content on in order to target particular keywords. these pages have been using podscms for content management. The client now wants to be able to duplicate these pages any number of times and edit the text within them. So basically, he wants to be have a dozen or so versions of about 4 linked pages. Does anyone know if it's possible to duplicate an entire multipage structure like this in WP? Or any WP driven sites that implement segmentation similarly?

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• xCode complitions, spelling checkings stoped

  - by SentineL

  My xCode 4.3.2 stopped to show up spelling errors and completions for code. The only way to find out if there is any error in the code - build it. xCode colores only keywords such as if, else, for etc. All other code hasn't colored. Shown only a few very strange completions. For example: CGPoint p; p.y // complition is "YES" p.x // complition is "xor" Completions for methods calls are only nearaly used methods. How can I fix this? I rebooted my mac several times allready, and didn't find any staff obout this in xCode's preferences.

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• Tracking/Counting Word Frequency

  - by Joel Martinez

  I'd like to get some community consensus on a good design to be able to store and query word frequency counts. I'm building an application in which I have to parse text inputs and store how many times a word has appeared (over time). So given the following inputs: "To Kill a Mocking Bird" "Mocking a piano player" Would store the following values: Word Count ------------- To 1 Kill 1 A 2 Mocking 2 Bird 1 Piano 1 Player 1 And later be able to quickly query for the count value of a given arbitrary word. My current plan is to simply store the words and counts in a database, and rely on caching word count values ... But I suspect that I won't get enough cache hits to make this a viable solution long term. Can anyone suggest algorithms, or data structures, or any other idea that might make this a well-performing solution?

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• Having 'mvn deploy' in Hudson's build goals and the standard approach of releasing

  - by user68759

  I set up Hudson for my project with the build goals mvn clean deploy site:site, run a build every midnight and whenever there are new changes. One thing I have been wondering is whether I should include deploy in the build goals because it could happen that if I had just released version 1.0.0 of my project (I've changed the pom to be version 1.0.0 and committed it) but not yet increased the version number to 1.0.1-SNAPSHOT for several days, I could end up with multiple different 1.0.0 builds being deployed at different times. But I've seen people are using deploy in their Hudson's build goals - I wonder how they deal with this issue. What's the correct way of doing a release with Maven actually? Thanks for any pointers!

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• breaking out from socket select

  - by kamziro

  I have a loop which basically calls this every few seconds (after the timeout): while(true){ if(finished) return; switch(select(FD_SETSIZE, &readfds, 0, 0, &tv)){ case SOCKET_ERROR : report bad stuff etc; return; default : break; } // do stuff with the incoming connection } So basically for every few seconds (which is specified by tv), it reactivates the listening. This is run on thread B (not a main thread). There are times when I want to end this acceptor loop immediately from thread A (main thread), but seems like I have to wait until the time interval finishes.. Is there a way to disrupt the select function from another thread so thread B can quit instantly?

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• How do I split up a long value (32 bits) into four char variables (8bits) using C?

  - by Jordan S

  I have a 32 bit long variable, CurrentPosition, that I want to split up into 4, 8bit characters. How would I do that most efficiently in C? I am working with an 8bit MCU, 8051 architectecture. unsigned long CurrentPosition = 7654321; unsigned char CP1 = 0; unsigned char CP2 = 0; unsigned char CP3 = 0; unsigned char CP4 = 0; // What do I do next? Should I just reference the starting address of CurrentPosition with a pointer and then add 8 two that address four times? It is little Endian. ALSO I want CurrentPosition to remain unchanged.

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• [struts 2] How do you iterate through a list of objects?

  - by Kevin

  I have a User class that has a String username in it. I have a list of users that I'm trying to display in a table using <s:iterator value="users" id="list"> <tr> <td><s:property value="#list.username" /></td> <td></td> <td></td> <td></td> </tr> </s:iterator> The rows are being displayed the right number of times, so it's iterating through my list properly. However, I don't know how to access the username property to display it. Obviously what I have above isn't correct... Any ideas?

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• Explicit or implicit execution control statement use

  - by Andrei Rinea

  I sometimes use if (this._currentToolForeColor.HasValue) return this._currentToolForeColor.Value; else throw new InvalidOperationException(); other times I use if (this._currentToolForeColor.HasValue) return this._currentToolForeColor.Value; throw new InvalidOperationException(); The two are equivalent, I know, but I am not sure which is the best and why. This goes even further as you can use other execution-control statements such as brake or continue : while(something) { if(condition) { DoThis(); continue; } else break; } versus while(something) { if(condition) { DoThis(); continue; } break; } EDIT 1 : Yes the loop example(s) suck because they are synthetic (i.e.: made up for this question) unlike the first which is practical.

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• Using SmtpClient.Send to send ~500-2500 emails what way would be faster.

  - by jamone

  I'm needing to send around 500-2500 emails out at a time to internal email accounts. I'm wondering which was would be faster both for the mail server and for my client app. Should I send multiple emails with just different TO addresses, or just one with multiple BCC addresses? I tried testing this by sending a bunch to my own email and the multiple emails method work, but with the BCC and a single message I only get that single message in my inbox. Shouldn't I be getting as many copies as the number of times I put my address in the BCC line?

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• How to bind value to its parent element value?

  - by KentZhou

  Silverlight provides element to element binding. How to apply it this is case: I have a xaml as below: <TextBlock Text="{Binding ABC}" > <ToolTipService.ToolTip> <local:MyControl Title="{Binding ...}" /> </ToolTipService.ToolTip> </TextBlock> I want to bind MyControl Title to the same data as its parent Textblock Text, but I don't want set x:Name for its parent Textblock. I know there is one solution to bind Title to same data source: <local:MyControl Title="{Binding ABC}" /> This may cause two times to call "{Binding ABC}", with my case, there ValurConverter for this binding. I don't want to use this way.

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