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• Fibonacci Sequence using loop and recur

  - by AdamJMTech

  I am doing the Project Euler challenge in Clojure and I want to find the sum of all the even numbers in a fibonacci sequence up to a certain number. The code for a function that does this is below. I know there are quicker and easier ways of doing this, I am just experimenting with recursion using loop and recur. However the code doesn't seem to work it never returns an answer. (defn fib-even-sum [upto] (loop [previous 1 nxt 1 sum 0] (if (or (<= upto 1) (>= nxt upto)) sum) (if (= (mod nxt 2) 0) (recur nxt (+ previous nxt) (+ sum nxt)) (recur nxt (+ previous nxt) sum)))) I was not sure if I could do recur twice in the same loop or not. I'm not sure if this is causing the problem?

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• Assigning values to variable WHILE loop

  - by Milaan

  Hi! I have a WHILE loop that loops through a table as long as $i is less than 10. I want this loop to assign the INNERHTML of each cell to a variable. So that I can use it later on to process the information (the loop is because you can choose if it has to take first 3 or first 10 cells). But how do I assign every innerHTML to a different variable? I'm sure there has to be an easy way. But google couldn't get me a good answer. Thanks in advance! Milaan

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• postgresql syntax while exists loop

  - by veilig

  I'm working at function from Joe Celkos book - Trees and Hierarchies in SQL for Smarties I'm trying to delete a subtree from an adjacency list but part my function is not working yet. WHILE EXISTS –– mark leaf nodes (SELECT * FROM OrgChart WHERE boss_emp_nbr = -99999 AND emp_nbr > -99999) LOOP –– get list of next level subordinates DELETE FROM WorkingTable; INSERT INTO WorkingTable SELECT emp_nbr FROM OrgChart WHERE boss_emp_nbr = -99999; –– mark next level of subordinates UPDATE OrgChart SET emp_nbr = -99999 WHERE boss_emp_nbr IN (SELECT emp_nbr FROM WorkingTable); END LOOP; my question: is the WHILE EXISTS correct for use w/ postgresql? I appear to be stumbling and getting caught in an infinite loop in this part. Perhaps there is a more correct syntax I am unaware of.

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• How to make if loop in grails?

  - by user3569696

  I'm beginner in Grails, please help. I have this in my gsp <div class="right66"> <g:select class="time_pick" name="pick_day" placeholder="" from="${['Dani', 'Sati', 'Minute']}" valueMessagePrefix="book.category"/> </div> In translation: Dani=Days, Sati= Hours, Minute= Minutes. I need to save data in minutes but User have privilege to choose will his input be in minutes, days or hours. So i have to do if loop. I now how if loop works but i don't know how to wite it in grails. I was thinking something like this: n=1 if(params.type=Dani){ n= 3600 }else if(params.type=Sati) { n=60 } def minute=params.minute*n but how to call that choosen input "Dani"? I can't write Params.type=Dani. Does if loop go in controller in my case?

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• Two BlockingQueue in the same endless loop?

  - by DrDol

  I have a thread, that processes incomming messages (endless loop). For this, I use a BlockingQueue (Java), which works as quite nice. Now, I want to add a second processor in the same Class oder method. The problem now is, that in the endless loop i have this part newIncomming = this.incommingProcessing.take(); This part blocks if the Queue is empty. I'm looking for a solution to process to queues in the same class. The second queue can only processed, it some data is coming in for the first Queue. Is there a way to handle tow blocking queues in the same endless loop?

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• nginx 301 redirect to subfolder on primary domain

  - by 187j3x1

  sorry for my poor english. i just set up wordpress on my vps, so far its the only item on my site. there for seo reason, i think is better redirect all primary domain to the blog folder. primary domain is example.com wordpress is at example.com/blog what i want is rewrite www.example.com and example.com to example.com/blog. googled got some scripts, and make some change paste into nginx config file. here is: #301 redirect www to non-www server { server_name www.example.com; location = / { rewrite ^/(.*) http://example.com/$1 permanent; } } #301 non-www to subfolder server { server_name example.com; location = / { rewrite ^/(.*) http://example.com/blog$1 permanent; } } it works at some degree, successfully redirect to example.com/blog. the only problem is i get 404 not found error. then i only make nginx redirect www to example.com/blog. ok, this time i can access blog page. i know there is something wrong in the non-www to subfolder script. but do not how to fix it :(

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• Passing in a value to a usercontrol through a foreach loop

  - by LooDaFunk

  in my asp.net mark up I have a foreach loop that iterates through a simple list. In this foreach loop I am adding a new user control and attempting to pass in the value from the loop. However, this value just wont budge and get inside that damn control! Anyone have any suggestions? <%foreach (userInfo i in this.items) { %> <uc1:ItemControl ID="ItemControl" runat="server" UserID='<%#Eval("userID") %>'/> <%} %> userID is a public property in the control, when it goes to set, the value is just literally : <%#Eval("userID") %. I've tried #Bind and =Value but nothing seems to work. Any help would be appreciated!

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• C++ Sentinel/Count Controlled Loop beginning programming

  - by Bryan Hendricks

  Hello all this is my first post. I'm working on a homework assignment with the following parameters. Piecework Workers are paid by the piece. Often worker who produce a greater quantity of output are paid at a higher rate. 1 - 199 pieces completed $0.50 each 200 - 399 $0.55 each (for all pieces) 400 - 599 $0.60 each 600 or more $0.65 each Input: For each worker, input the name and number of pieces completed. Name Pieces Johnny Begood 265 Sally Great 650 Sam Klutz 177 Pete Precise 400 Fannie Fantastic 399 Morrie Mellow 200 Output: Print an appropriate title and column headings. There should be one detail line for each worker, which shows the name, number of pieces, and the amount earned. Compute and print totals of the number of pieces and the dollar amount earned. Processing: For each person, compute the pay earned by multiplying the number of pieces by the appropriate price. Accumulate the total number of pieces and the total dollar amount paid. Sample Program Output: Piecework Weekly Report Name Pieces Pay Johnny Begood 265 145.75 Sally Great 650 422.50 Sam Klutz 177 88.5 Pete Precise 400 240.00 Fannie Fantastic 399 219.45 Morrie Mellow 200 110.00 Totals 2091 1226.20 You are required to code, compile, link, and run a sentinel-controlled loop program that transforms the input to the output specifications as shown in the above attachment. The input items should be entered into a text file named piecework1.dat and the ouput file stored in piecework1.out . The program filename is piecework1.cpp. Copies of these three files should be e-mailed to me in their original form. Read the name using a single variable as opposed to two different variables. To accomplish this, you must use the getline(stream, variable) function as discussed in class, except that you will replace the cin with your textfile stream variable name. Do not forget to code the compiler directive #include < string at the top of your program to acknowledge the utilization of the string variable, name . Your nested if-else statement, accumulators, count-controlled loop, should be properly designed to process the data correctly. The code below will run, but does not produce any output. I think it needs something around line 57 like a count control to stop the loop. something like (and this is just an example....which is why it is not in the code.) count = 1; while (count <=4) Can someone review the code and tell me what kind of count I need to introduce, and if there are any other changes that need to be made. Thanks. [code] //COS 502-90 //November 2, 2012 //This program uses a sentinel-controlled loop that transforms input to output. #include <iostream> #include <fstream> #include <iomanip> //output formatting #include <string> //string variables using namespace std; int main() { double pieces; //number of pieces made double rate; //amout paid per amount produced double pay; //amount earned string name; //name of worker ifstream inFile; ofstream outFile; //***********input statements**************************** inFile.open("Piecework1.txt"); //opens the input text file outFile.open("piecework1.out"); //opens the output text file outFile << setprecision(2) << showpoint; outFile << name << setw(6) << "Pieces" << setw(12) << "Pay" << endl; outFile << "_____" << setw(6) << "_____" << setw(12) << "_____" << endl; getline(inFile, name, '*'); //priming read inFile >> pieces >> pay >> rate; // ,, while (name != "End of File") //while condition test { //begining of loop pay = pieces * rate; getline(inFile, name, '*'); //get next name inFile >> pieces; //get next pieces } //end of loop inFile.close(); outFile.close(); return 0; }[/code]

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• How to replace for-loops with a functional statement in C#?

  - by Lernkurve

  A colleague once said that God is killing a kitten every time I write a for-loop. When asked how to avoid for-loops, his answer was to use a functional language. However, if you are stuck with a non-functional language, say C#, what techniques are there to avoid for-loops or to get rid of them by refactoring? With lambda expressions and LINQ perhaps? If so, how? Questions So the question boils down to: Why are for-loops bad? Or, in what context are for-loops to avoid and why? Can you provide C# code examples of how it looks before, i.e. with a loop, and afterwards without a loop?

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• string parse and replace in for loop

  - by reffer

  i have a string that looks like this - "1AL||9CA||34CO||196WY||..." i want to use a for loop or while loop, in which if i have an integer, it should parse this string and delete the value matching that integer. example for above string string = "1AL||9CA||34CO||196WY||..." integer = 34 for ... loop new string = "1AL||9CA||196WY||..." As you can see the integer matched the integer 34 and deleted from one delimeter "||" to th next one. how can i do this?

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• Strange behavior of for loop in scheduler_tick

  - by EpsilonVector

  I'm working on Linux kernel 2.4 (homework) and I inserted the following code into the scheduler_tick function: if (unlikely(rt_task(p)) || (p->policy==SCHED_PROD && p->time_ran>=p->process_expected_time)) { /* * RR tasks need a special form of timeslice management. * FIFO tasks have no timeslices. */ if ((p->policy == SCHED_RR || /*change*/p->policy==SCHED_PROD) && !--p->time_slice) { /*changes*/ if (p->policy == SCHED_PROD){ for (i=0; i<5000; i++){ printk("I'm leeching off SCHED_RR code! %d\n", i); } } /*end changes*/ The addition was added for debugging purposes. For some reason this causes very weird behavior: when a SCHED_PROD process triggers this code (and consequently the loop that follows) the loop counts to about 4600 normally, but then goes back to 4600 each time it counts to 4800, and gets stuck in an infinite loop. What's going on?? EDIT: The i variable is my own.

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• Bash loop command until file contains n duplicate entries (lines)

  - by Andrew

  Hello, I'm writing a script and I need to create a loop that will execute same commands until file does contain a specified number of duplicate entries. For example, with each loop I will echo random string to file results. And I want loop to stop when there are 10 lines of of the same string. I thought of something like while [ `some command here (maybe using uniq)` -lt 10 ] do command1 command2 command3 done Do you have any idea how can this problem be solved? Using grep can't be done since I don't know what string I need to look for. Thank you for your suggestions.

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• Erlang message loops

  - by Roger Alsing

  How does message loops in erlang work, are they sync when it comes to processing messages? As far as I understand, the loop will start by "receive"ing a message and then perform something and hit another iteration of the loop. So that has to be sync? right? If multiple clients send messages to the same message loop, then all those messages are queued and performed one after another, or? To process multiple messages in parallell, you would have to spawn multiple message loops in different processes, right? Or did I misunderstand all of it?

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• border highlighting loop with jquery

  - by Tek

  I'm having trouble coming up with a loop that changes the border color of an image from black to yellow and yellow to black over x seconds. Then applying an interrupt to the loop when the image gets clicked on. I don't know where to start, can someone point me in the right direction? I think I may be using the wrong tools to properly write this. Here's what I've come up so far, though if there's a better way to write this, do share! for( i = 100; i >= 0; i--) { $("#imgid").css("border-color", 'rgb(' + i + '%,' + i + '%,0)'); } I'm having trouble picturing how I could combine two loops so that I can also count upwards as well so that it will turn into yellow and back to black. I also don't know how to go about controlling the amount of time it takes for that loop to execute and creating an interrupt when #imigid is clicked. Which is where I'm not sure how to write.

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• Thousands of visits a day from untraceable traffic to website - Serious issue

  - by kel

  At the end of January we noticed a spike in traffic to what JetPack stats says was home/archive page and what Google was classifying as going to /gaming/ which is an archive list in WordPress. This started off as ~3,000 unique visitors and jumped up to 65,000 unique visitors in one day, again all to the "home" page. This happened over a course of a couple of weeks and we thought we were getting attacked. The traffic then dropped off for a few days but then came back but came back as only about ~15,000 uniques a day and has been like that every day since. We came to the conclusion that something wasn't tracking right somewhere and this is legitimate traffic and brushed it off. Now here comes the problem, Google AdSense has just disabled our account for "invalid clicks". We are trying to figure out where this traffic is coming from and stop it if it's not legitimate or figure out a way to track it correctly. Specs for the site: Dedicated server running CentOS 6 with nginx, php-fpm and MySQL. The site is built in WordPress and we use CloudFlare and W3 Total Cache. Analytics being used are Google Analytics, Quantcast, Alexa and Compete. Any kind of help would be awesome. UPDATE: I'm finding more people with the same type of problem and there doesn't seem to be a solution. http://netmeg.com/bot-attack/ http://stkywll.com/2012/03/02/annoying-cyborgs-attach-distort-analytics/ After looking at the access logs I noticed they were all CloudFlare IP's. I looked into that and found out CloudFlare acts as a proxy and there was a way to fix the logs in nginx. They are coming from many different ISP's in the US. They are going to /games/ or /gaming/ (/games/ redirects to /gaming/) and all seem to have the same user agent of Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0).

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• Write the longest possible loop.

  - by Abhay

  Hello Group, Recently I was asked this question in a technical discussion. What is the longest possible loop that can be written in a programming language? This loop has to be as long as possible and yet not an infinite loop and should not end-up crashing the program (Recursion etc...) I honestly did not know how to attack this problem, so I asked him if is it practically possible. He said using some computer science concepts, you can arrive at a hypothetical number which may not be practical but nevertheless it will still not be infinite. Anyone here; knows how to analyse / attack this problem. P.S. Choosing some highest limit for a type that can store the highest numerical value is apparently not an answer. Thanks in advance,

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• a nicer way to create structs in a loop

  - by sandra

  Hi guys, I haven't coded in C++ in ages. And recently, I'm trying to work on something involving structs. Like this typedef struct{ int x; int y; } Point; Then in a loop, I'm trying to create new structs and put pointers to them them in a list. Point* p; int i, j; while (condition){ // compute values for i and j with some function... p = new Point; p* = {i, j}; //initialize my struct. list.append(p); //append this pointer to my list. } Now, my question is it possible to simplify this? I mean, the pointer variable *p outside of the loop and calling p = new Point inside the loop. Isn't there a better/nicer syntax for this?

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• Removing title from wp_list_cats()

  - by Alex

  I'm trying to remove/replace the title attribute on the category elements used by WordPress. I'm using WordPress 2.9.1, with the following code: <div id="categories"> <h3>Manufacturers</h3> <ul> <?php str_replace("title=\"View all posts filed under ","",wp_list_categories('use_desc_for_title=0&exclude=1,2,3,4,5&title_li=&hierarchical=1')); ?> </ul> </div> From what I had read this method used to work on older versions (I had never tried it though). I really don't want to hack at the interals of WordPress, or have to use a JavaScript hack, for something so straight forward. Any help is appreciated... Update below is what is created from the code above... Manufacturers Featured

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• Breaking from for loop in MATLAB GUI

  - by Nick

  I have a for loop in the opening function of a GUI in MATLAB and I'm trying to use a callback button to break the loop. I'm new to MATLAB. Here's the code I have: %In the opening function of the GUI handles.stop_now = 0; for i=1:inf if handles.stop_now==1 break; end end % Executes on button press function pushbutton_Callback(hObject, eventdata, handles) % hObject handle to end_segmenting_button (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) handles.stop_now=1; guidata(hObject, handles); For some reason, despite defining the variables with handles, the loop doesn't break upon pressing the button. Anyone know what's going on? Thanks.

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• PHP Casting as Object type in foreach Loop

  - by Coulton

  Within the following code, $quiz_object->personalities contains an array of Personality() objects. // Loop through each personality that exists for the quiz foreach($quiz_object->personalities AS $existing_personality) { // Show all of the existing personalities echo $existing_personality->GetQuizMakerPersonalityHTML(); } How do I "cast" (I think that's the right word) my variable $existing_personality within the foreach loop as the object type? I wish to do this so that when I type $existing_personality->, I get the list of public functions available for that object type. At the moment, Zend doesn't know that it refers to a Personality object within the loop.

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• How to improve the speed of a loop containing a sqlalchemy query statement as conditional

  - by LtPinback

  This loop checks if a record is in the sqlite database and builds a list of dictionaries for those records that are missing and then executes a multiple insert statement with the list. This works but it is very slow (at least i think it is slow) as it takes 5 minutes to loop over 3500 queries. I am a complete newbie in python, sqlite and sqlalchemy so I wonder if there is a faster way of doing this. list_dict = [] session = Session() for data in data_list: if session.query(Class_object).filter(Class_object.column_name_01 == data[2]).filter(Class_object.column_name_00 == an_id).count() == 0: list_dict.append({'column_name_00':a_id, 'column_name_01':data[2]}) conn = engine.connect() conn.execute(prices.insert(),list_dict) conn.close() session.close() edit: I moved session = Session() outside the loop. Did not make a difference.

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• String loops in Python

  - by Steve Hunter

  I have two pools of strings and I would like to do a loop over both. For example, if I want to put two labeled apples in one plate I'll write: basket1 = ['apple#1', 'apple#2', 'apple#3', 'apple#4'] for fruit1 in basket1: basket2 = ['apple#1', 'apple#2', 'apple#3', 'apple#4'] for fruit2 in basket2: if fruit1 == fruit2: print 'Oops!' else: print "New Plate = %s and %s" % (fruit1, fruit2) However, I don't want order to matter -- for example I am considering apple#1-apple#2 equivalent to apple#2-apple#1. What's the easiest way to code this? I'm thinking about making a counter in the second loop to track the second basket and not starting from the point-zero in the second loop every time.

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• C++: Allocation of variables in a loop

  - by Rosarch

  Let's say I have a loop like this: vector<shared_ptr<someStruct>> vec; int i = 0; while (condition) { i++ shared_ptr<someStruct> sps(new someStruct()); WCHAR wchr[20]; memset(wchr, i, 20); sps->pwsz = wchr; vec.push_back(sps); } At the end of this loop, I see that for each sps element of the vector, sps->pwsz is the same. Is this because I'm passing a pointer to memory allocated in a loop, which is destructed after each iteration, and then refilling that same memory on the next iteration?

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• how to not use relative links in html, but everytime starting from the domain.

  - by Andy

  Hi, I'm trying to make a page for use with wordpress and it's almost working, The page I want to use is an HTML page with designated space for it within certain DIVs. I'm encountering the problem of wordpress using the wrong links to kind of everything. I will probably have to change every link to http://www.mydomain.com/sub/folder/image.jpg while there are many links. the page is positioned in a subfolder, there where wordpress is installed on the server. But other pages are positioned in the root, and retrieve all other files directly starting from the domain so writing /sub/folder/image.jpg is enough. Is there a way I could get this to work with html/php files in sub folders as well (so when typing a link like /sub/folder/image.jpg they retrieve http://www.mydomain.com/sub/folder/image.jpg and not http://www.mydomain.com/sub/folder/sub/folder/image.jpg thanks!

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• Can't subtract in a for loop in C/Objective-C

  - by user1612935

  I'm going through the Big Nerd Ranch book on Objective-C, which takes you through some early C stuff. I've played with C before, and am pretty experienced in PHP. Anyhow, I'm doing the challenges and this one is not working the way I think it should. It's pretty simple - start at 99, loop through and subtract three until you get to zero, and every time you get a number that is divisible by 5 print "Found one." Pretty straightforward. However, subtracting by three in the for loop is not working #include <stdio.h> int main (int argc, const char * argv[]) { int i; for(i = 99; i > 0; i-3){ printf("%d\n", i); if(i % 5 == 0) { printf("Found one!\n"); } } return 0; } It creates and endless loop at 99, and I'm not sure why.

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