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• C# - Listing class properties like Immediate window

  - by Robert

  Hi, I store a few classes in session. I want to be able to see the values of my class properties in trace viewer. By default I only the Type name MyNamespace.MyClass. I was wondering if I overwrite the .ToString() method and use reflection to loop over all the properties and construct a string like that ... it would do the trick but just wanted to see if there is anything already out there (specially since Immediate Window has this capability) which does the same ... i.e. list the class property values in trace instead of just the Name of the class. Thanks!

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• Multiple HTTP request - Rails

  - by bradleyg

  My application checks a number of domains to see if they are valid (approx 100). I have the following code to check a single domain: def self.test_url uri, limit = 10 if limit == 0 return get_error_messages("001") end begin url = URI.parse(uri) response = Net::HTTP.start(url.host, url.port).request_head('/') rescue SocketError => e return get_error_messages("002") end case response when Net::HTTPRedirection then test_url(response['location'], limit - 1) else return get_error_messages(response.code) end end The code checks for the response code while taking into account redirects. This works fine. The only problem I have is when I put this in a loop I want it to run in parallel. So I don't have to wait for domain 1 to respond before I can request domain 2. I have managed this in PHP using curl_multi to run the requests in parallel. Is there a similar thing I can do in Rails?

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• List with items returns empty

  - by Power-Mosfet

  I have created a simple List function but if I Loop through the List it's empty. It should not be! All, thank you for the input. problem solved // List function public class process_hook { public static List<string> pro_hook = list_all_processes(); protected static List<string> list_all_processes() { var list = new List<string>(); foreach (Process i in Process.GetProcesses(".")) { try { foreach (ProcessModule pm in i.Modules) { list.Add(pm.FileName); } } catch { } } return list; } } // call private void button1_Click(object sender, EventArgs e) { foreach (String _list in process_hook.pro_hook) { Console.WriteLine(_list); } }

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• Getting All categories in external page.

  - by Harsha

  This is very basic magento question i guess. I want to first get all the store categories, then loop through them to get their sub-categories and products and similarly continue till the last sub-category. I will be using this in an external page having Mage::app() declared at the top of the page. I am not aware of the Magento API's(if thats wat they are called) to use to get this functionality. Remember I am not using this in any of the templates, so something like getCurrentCategory() will not work here i guess. Also please guide if there are any good resources to search for particular functionality in magento and API's to implement it, or am i doomed to go through their phpdoc to know the list of methods. Any help here will be greatly appreciated, Thanks.

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• Reading JSON string in Jquery

  - by Bala

  Hi All When i try to read a JSON string like below it goes to endless loop. <script language="javascript"> $(document).ready(function() { $("#Button1").click(function() { var json = "[{'City':'Lucknow','ID':'1'},{'City':'Mumbai','ID':'2'}]"; $.each(json, function() { alert(this['City']); }); }); </script> Not sure what i am doing wrong? Please helpme out!

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• php - How do I get rid of this strange "empty delimiter" message

  - by Steven

  I have some code that uses the stristr function to extract data I need. It works, in that it gives me the results I'm looking for. BUT (you knew there was a but), it gives me this error message for every iteration of the loop: Warning: stristr() [function.stristr]: Empty delimiter in ... line 55 Like I said, the code works apart from this error. Can anyone suggest how i could amend this code to get rid of the message? Thanks in advance $data = stristr("$text", "$key"); $result = string_limit_words($data,2); print "$result<BR>";

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• "tail -f" alternate which doesn't scroll the terminal window

  - by Jagtesh Chadha

  I want to check a file at continuous intervals for contents which keep changing. "tail -f" doesn't suffice as the file doesn't grow in size. I could use a simple while loop in bash to the same effect: while [ 1 ]; do cat /proc/acpi/battery/BAT1/state ; sleep 10; done It works, although it has the unwanted effect of scrolling my terminal window. So now I'm wondering, is there a linux/shell command that would display the output of this file without scrolling the terminal?

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• Web applet game design

  - by Vlad

  I making web games in java and having troubles each time when getting to the GUI design, usually I'm looking at others codes and copy most of the design, and I can't decide which design should I use. I used Applet, Canvas, JFrame. What i need is the main loop and draw function that changing between different games. So what class should I use and what design, which is better, why, maybe links to useful tutorials and examples... Please explain. Thanks.

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• Is there a .NET class that represents operator types?

  - by user323774

  I would like to do the following: *OperatorType* o = *OperatorType*.GreaterThan; int i = 50; int increment = -1; int l = 0; for(i; i o l; i = i + increment) { //code } this concept can be kludged in javascript using an eval()... but this idea is to have a loop that can go forward or backward based on values set at runtime. is this possible? Thanks

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• PHP IF statement not taking variable into account!

  - by Jess

  I have a tabled view in a while loop, where a user can view information on books. For example, book ISBN, book name, read status... Basically, when the user sets their 'readstatus' to 'complete' I want that specific table row to become grey! The logic is very straight forward, however I can't get my IF statement to recognise this: $readstatus = $_GET['readstatus']; if ($readstatus == 'complete') { echo '<tr class="completed">'; } else if ($readstatus != 'complete') { echo '<tr class="reading">'; } I'm obviously doing something wrong here, but all I need is the CSS class of the table row to change if the value of 'readstatus' = 'complete', if not, then output the default CSS table row color ('reading') Should I be putting $result as the variable or something? I have this coming just before my nested IF statement: $result = mysql_query($sql, $connection) or die ("Couldn't perform query $sql <br />".mysql_error()); while($row = mysql_fetch_array($result)) { ?>

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• JQuery get height of each previous element

  - by Jk_

  I'm trying to find a good solution to get the height of all the element above my target. So loop the prev() function ! Any ideas on how I could deal with that ? <div> <div style="height:50px;width:100%"></div> <div style="height:12px;width:100%"></div> <div style="height:23px;width:100%"></div> <div style="height:56px;width:100%"></div> <div id="#mytarget"><p>HERE</p></div> </div> $('#mytarget').prev().each(function() { alert($(this).outerHeight()); }); and it will fires ["56","23","12","50"].

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• Querying a smalldatetime's date and time seperately in SQL server?

  - by Kylee

  Imagine a table that has two fields, a smalltimedate and an int and about 1000 rows of data. What I'm attempting to do in query is to find the average of the INT field for rows between 3/3/2010 - 3/13/2010 and only if the entry is between 6:00am - 11:00pm. I tried between '2010-03-03 06:00 AND 2010-03-13 23:00' However that only restricts that very beginning and end times. I could do this with a loop but I'm going to need to have the same query run over much larger date ranges and this will quickly eat server resources. Is there a way to query date and time seperately?

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• MultiThreading question

  - by TiGer

  Hi, I am developing on Android but the question might be just as valid on any other Java platform. I have developed a multi-threaded app. Lets say I have a first class that needs to do a time-intensive task, thus this work is done in another Thread. When it's done that same Thread will return the time-intensive task result to another (3rd) class. This last class will do something and return it's result to the first-starting class. I have noticed though that the first class will be waiting the whole time, maybe because this is some kind of loop ? Also I'd like the Thread-class to stop itself, as in when it has passed it's result to the third class it should simply stop. The third class has to do it's work without being "incapsulated" in the second class (the Thread one). Anyone knows how to accomplish this ? right now the experience is that the first one seems to be waiting (hanging) till the second and the third one are done :(

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• [R] how do I quickly group the time column in a dataframe into intervals?

  - by Derek

  Hi, Assuming in R, I have a data.frame with the first column representing the time (as POSIXct). The rest of the columns (e.g., columns 2) are numeric data. I would like to group time into 3-minute intervals. Each interval will the the average of values that falls into that particular interval. Right now, I have a for-loop that iterates through the time column and generate the interval on the fly. I am wondering if there's a more elegant way to accomplish the same thing? Thanks in advance. Derek

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• UITableView with Shake and play.

  - by avural79

  hi all i am trying to make a musical app for iphone. the app is simple. there is a couple of musical note sample (caf) files. when user taps the predefined positions on uiview(like strings). app plays note sample and add a string value to a nsmutablearray about note. played note lists displays in a table. now i want to add a shake and play mode to app. when user shake iphone, recorded notes start to play from first record to last record and loop again. also if user shake iphone harder notes will plays faster. how can i do that. any idea? thanks

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• Best practice for creating objects used in for/foreach loops

  - by StupidDeveloper

  Hi! What's the best practice for dealing with objects in for or foreach loops? Should we create one object outside the loops and recreate it all over again (using new... ) or create new one for every loop iteration? Example: foreach(var a in collection) { SomeClass sc = new SomeClass(); sc.id = a; sc.Insert(); } or SomeClass sc = null; foreach(var a in collection) { sc = new SomeClass(); sc.id = a; sc.Insert(); } Which is better?

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• Minimizing distance to a weighted grid

  - by Andrew Tomazos - Fathomling

  Lets suppose you have a 1000x1000 grid of positive integer weights W. We want to find the cell that minimizes the average weighted distance.to each cell. The brute force way to do this would be to loop over each candidate cell and calculate the distance: int best_x, best_y, best_dist; for x0 = 1:1000, for y0 = 1:1000, int total_dist = 0; for x1 = 1:1000, for y1 = 1:1000, total_dist += W[x1,y1] * sqrt((x0-x1)^2 + (y0-y1)^2); if (total_dist < best_dist) best_x = x0; best_y = y0; best_dist = total_dist; This takes ~10^12 operations, which is too long. Is there a way to do this in or near ~10^8 or so operations?

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• Grabbing Just The Top Entry From A LINQ Query

  - by Soo

  I basically have a lot of poorly designed code to do something that, I'm sure, can be done far more elegantly. What I'm trying to do is grab the last date from a database table. var Result = from a in DB.Table orderby a.Date descending select new {Date = a}; foreach(var Row in Result) { LastDate = Row.Date.Date; break; } Basically, there's a foreach loop that is designed to run only once. Crappy code! What's a "best practice" way to accomplish the same thing?

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• How do I use link_to_remote to pass then render a partial in rails?

  - by Angela

  I want to create several link_to_remote links that are campaign names: <% @campaigns.each do |campaign| %> <!--link_to_remote(name, options = {}, html_options = nil)--> <%= link_to_remote(campaign, :update => "campaign_todo", :url => %> <% end %> I want the output to update on the page to render a partial, which runs a loop through the values associated with the campaign. The API docs says this will render a partial, but I'm not clear where the name of the :partial template is passed in, either here or in the controller Thanks.

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• Is it bad practice to initialize a variable to a dummy value?

  - by froadie

  This question is a result of the answers to this question that I just asked. It was claimed that this code is "ugly" because it initializes a variable to a value that will never be read: String tempName = null; try{ tempName = buildFileName(); } catch(Exception e){ ... System.exit(1); } FILE_NAME = tempName; Is this indeed bad practice? Should one avoid initializing variables to dummy values that will never actually be used? (EDIT - And what about initializing a String variable to "" before a loop that will concatenate values to the String...? Or is this in a separate category? e.g. String whatever = ""; for(String str : someCollection){ whatever += str; } )

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• Ant loadfile override property

  - by lucks

  Hi, I'm trying to use the Ant task <loadfile> in a loop to parse the contents of a file. I have something like <loadfile srcFile="@{some.input}" property="my.property"> Since Ant properties are immutable, this doesn't work for me. I need 'my.property' to update on every iteration. Is there a way to achieve this? I know Ant-contrib has a <var> task but I'm not sure how to use <loadfile> with it. Any recommendations? Thanks.

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• Mootools event leak

  - by user572263

  The example to demonstrate the issue can be found here: link text The test shows a basic Mootools class that contains an element variable with a click event attached. There’s also a “cleanup” function to remove the event and nullify the element variable. My problem is that when I loop a thousand times to create the “LeakClass” instance and clean it up, it causes a major memory leak like there’s no tomorrow. I tested this on IE8 and Chrome. On the other hand what I’ve noticed is that if I comment out the line that adds the “click” event, the code doesn’t leak. Can somebody please help me structure the class/event in a manner that it doesn’t leak. Thanks in advance.

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• sort a list of objects based on runtime property

  - by jijo

  I have an arraylist of VOs. These objects have many properties and corresponding get/set methods. I want to sort this array list based on a property which I'll be getting in runtime. Let me explain in detail. My VO is like this public class Employee { String name; String id; private String getName() { return name; } private String getId() { return id; } } I will be getting a string ‘sort’ in runtime, which can be either ‘id’ of ‘name’. I want to sort the list based on the value of the string. I have tried to use comparator and reflection together, but no luck. I don’t want to use an if loop and create new comparator classes. Any other thoughts?

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• Please help me with this Ruby code

  - by Bragaadeesh

  Hi, I am new to Ruby and I know that I am not using the simple and powerful methods available within it. I made my code work but it has to be simple not this huge (especially I feel I am very bad at loop variables) i = 0 j = 0 loop_count = ((to_date-from_date)/(60*60*24)).to_i#diff b/w two dates in days loop_count.times do 48.times do event = Icalendar::Event.new status = get_availability_on_date_and_hour(@templates, @availabilities, from_date+j.days, i).downcase if(status != 'unavailable') #Initialize start and end dates in DateTime's civil format bias_date_time = DateTime.civil(from_date.year, from_date.month, from_date.day) event.dtstart = bias_date_time + j.day + (i/2).to_i.hour + (i%2*30).to_i.minutes event.dtend = event.dtstart + 30.minutes event.summary = status.upcase cal.add_event(event) end i += 1 end i = 0 j += 1 end

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• Heap Error in C++

  - by BobAlmond

  Dear all, I'm a beginner programmer in C++. Recently, I'm working on image processing thing using C++. but I have some problem that I want to ask. Suppose I have some code as follow: for (int i=0;i<100000;i++) { int * a = new int[10000]; //do something delete [] a; } When I executed that code, I receive runtime error, Heap Error... Is there anything wrong with that code, I mean, can I allocate memory and release it in the same loop? Thanks in advance...

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