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  • Does it take time to deallocate memory?

    - by jm1234567890
    I have a C++ program which, during execution, will allocate about 3-8Gb of memory to store a hash table (I use tr1/unordered_map) and various other data structures. However, at the end of execution, there will be a long pause before returning to shell. For example, at the very end of my main function I have std::cout << "End of execution" << endl; But the execution of my program will go something like $ ./program do stuff... End of execution [long pause of maybe 2 min] $ -- returns to shell Is this expected behavior or am I doing something wrong? I'm guessing that the program is deallocating the memory at the end. But, commercial applications which use large amounts of memory (such as photoshop) do not exhibit this pause when you close the application. Please advise :)

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  • Iterator blocks in Clojure?

    - by Checkers
    I am using clojure.contrib.sql to fetch some records from an SQLite database. (defn read-all-foo [] (with-connection *db* (with-query-results res ["select * from foo"] (into [] res)))) Now, I don't really want to realize the whole sequence before returning from the function (i.e. I want to keep it lazy), but if I return res directly or wrap it some kind of lazy wrapper (for example I want to make a certain map transformation on result sequence), SQL-related bindings will be reset and connection will be closed after I return, so realizing the sequence will throw an exception. How can I enclose the whole function in a closure and return a kind of iterator block (like yield in C# or Python)? Or is there another way to return a lazy sequence from this function?

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  • perl split on empty file

    - by Casey
    I have basically the following perl I'm working with: open I,$coupon_file or die "Error: File $coupon_file will not Open: $! \n"; while (<I>) { $lctr++; chomp; my @line = split/,/; if (!@line) { print E "Error: $coupon_file is empty!\n\n"; $processFile = 0; last; } } I'm having trouble determining what the split/,/ function is returning if an empty file is given to it. The code block if (!@line) is never being executed. If I change that to be if (@line) than the code block is executed. I've read information on the perl split function over at http://perldoc.perl.org/functions/split.html and the discussion here about testing for an empty array but not sure what is going on here. I am new to Perl so am probably missing something straightforward here. Thanks.

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  • Representing robot's elbow angle in 3-D

    - by Onkar Deshpande
    I am given coordinates of two points in 3-D viz. shoulder point and object point(to which I am supposed to reach). I am also given the length from my shoulder-to-elbow arm and the length of my forearm. I am trying to solve for the unknown position(the position of the joint elbow). I am using cosine rule to find out the elbow angle. Here is my code - #include <stdio.h> #include <math.h> #include <stdlib.h> struct point { double x, y, z; }; struct angles { double clock_wise; double counter_clock_wise; }; double max(double a, double b) { return (a > b) ? a : b; } /* * Check if the combination can make a triangle by considering the fact that sum * of any two sides of a triangle is greater than the remaining side. The * overlapping condition of links is handled separately in main(). */ int valid_triangle(struct point p0, double l0, struct point p1, double l1) { double dist = sqrt(pow((fabs(p1.z - p0.z)), 2) + pow((fabs(p1.y - p0.y)), 2) + pow((fabs(p1.x - p0.x)), 2)); if((max(dist, l0) == dist) && max(dist, l1) == dist) { return (dist < (l0 + l1)); } else if((max(dist, l0) == l0) && (max(l0, l1) == l0)) { return (l0 < (dist + l1)); } else { return (l1 < (dist + l0)); } } /* * Cosine rule is used to find the elbow angle. Positive value indicates a * counter clockwise angle while negative value indicates a clockwise angle. * Since this problem has at max 2 solutions for any given position of P0 and * P1, I am returning a structure of angles which can be used to consider angles * from both direction viz. clockwise-negative and counter-clockwise-positive */ void return_config(struct point p0, double l0, struct point p1, double l1, struct angles *a) { double dist = sqrt(pow((fabs(p1.z - p0.z)), 2) + pow((fabs(p1.y - p0.y)), 2) + pow((fabs(p1.x - p0.x)), 2)); double degrees = (double) acos((l0 * l0 + l1 * l1 - dist * dist) / (2 * l0 * l1)) * (180.0f / 3.1415f); a->clock_wise = -degrees; a->counter_clock_wise = degrees; } int main() { struct point p0, p1; struct angles a; p0.x = 15, p0.y = 4, p0.z = 0; p1.x = 20, p1.y = 4, p1.z = 0; double l0 = 5, l1 = 8; if(valid_triangle(p0, l0, p1, l1)) { printf("Three lengths can make a valid configuration \n"); return_config(p0, l0, p1, l1, &a); printf("Angle of the elbow point (clockwise) = %lf, (counter clockwise) = %lf \n", a.clock_wise, a.counter_clock_wise); } else { double dist = sqrt(pow((fabs(p1.z - p0.z)), 2) + pow((fabs(p1.y - p0.y)), 2) + pow((fabs(p1.x - p0.x)), 2)); if((dist <= (l0 + l1)) && (dist > l0)) { a.clock_wise = -180.0f; a.counter_clock_wise = 180.0f; printf("Angle of the elbow point (clockwise) = %lf, (counter clockwise) = %lf \n", a.clock_wise, a.counter_clock_wise); } else if((dist <= fabs(l0 - l1)) && (dist < l0)){ a.clock_wise = -0.0f; a.counter_clock_wise = 0.0f; printf("Angle of the elbow point (clockwise) = %lf, (counter clockwise) = %lf \n", a.clock_wise, a.counter_clock_wise); } else printf("Given combination cannot make a valid configuration\n"); } return 0; } However, this solution makes sense only in 2-D. Because clockwise and counter-clockwise are meaningless without an axis and direction of rotation. Returning only an angle is technically correct but it leaves a lot of work for the client of this function to use the result in meaningful way. How can I make the changes to get the axis and direction of rotation ? Also, I want to know how many possible solution could be there for this problem. Please let me know your thoughts ! Any help is highly appreciated ...

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  • Cannot modify header information - headers already sent by

    - by bhaskaragr29
    header('Content-type: image/png'); require_once 'wordwrap.php'; $text="Lorem Ipsum Lorem Ipsum Lorem Ipsum Lorem Ipsum Lorem Ipsum Lorem Ipsum Lorem Ipsum Lorem Ipsum Lorem Ipsum"; $im=imagecreatefrompng('testing.png'); $arr=word($text); $white = imagecolorallocate($im,255,255,255); $grey = imagecolorallocate($im, 128, 128, 128); $font='arial.ttf'; $m=121; for($i=0;$i Word function is returning an array.I am writing array on image as multiple lines.I am getting error when when placed below imagepng function Warning: Cannot modify header information - headers already sent by (output started at /home2/puneetbh/public_html/prideapp/Testing/wordwrap.php:33) in /home2/puneetbh/public_html/prideapp/Testing/checkimage.php on line 12 ‰PNG ??? IHDR?? ??ô???J"Þ/?? ?IDATxœì¼KvÉŽ%ŠŸ}Ü)EfäjÕxÝËÇ›nE^)Èãn??Õ€J‘UÕ~ß --ŠKäƒÛàÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ7nܸqãÆ When placd in starting i m getting this file cannot be displayed because it contains errors. PLease Help

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  • JQUERY-UI Draggables - Seralize is running before the Draggable is complete

    - by nobosh
    Hello, I'm using the JQUERY-UI draggable plugin. As a setting, when the Draggable is done, using the STOP setting I run a function to seralize a list of LIs to get their order in terms of their IDs. For example, if I have an UL, with a list of LIs with the following IDs: 1,2,3,4,5 If I then move 5, between 2&3, the seralize is returning: 1,2,5,3,4,5 Which makes me think that the JQUERY UI-Draggable STOP is running before the page is finished rendering, or the DOM isn't update? Any ideas on how I can fix this from happening. Is there something I can do in my Seralize funtion to say, wait till JQUERY animations are all done, or stop all that are going on to ensure the DOM is accurate? Thanks

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  • MySQL query, SUM of multiple colums

    - by Mick
    Hi I have multiple columns in a mySQL table. Three of the columns are named i100s, i60s and i25s and what I want to do is get the sum of all three entries . currently I have this code '$query= "SELECT SUM(i100s),SUM(i60s),SUM(i25s) AS tkit FROM event WHERE acc='100' " ; $result = mysql_query($query) or die(mysql_error()); $row = mysql_fetch_assoc($result) ; $total = $row['tkit'];' But it is not returning the correct result , can anyone help me please ? Thanks Mick

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  • Linux Kernel - programmatically retrieve block numbers as they are written to

    - by SpdStr
    I want to maintain a list of block numbers as they are physically written to using the linux kernel source. I plan to modify the kernel source to do this. I just need to find the structure and functions in the kernel source that handle writing to physical partitions and get the block numbers as they write to the physical partition. Any way of doing this? Any help is appreciated. If I can find where the kernel is actually writing to the partitions and returning the block numbers, that'd work.

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  • Using one sqlconnection/sqlcommand through 2 DB-bound methods

    - by dotnetdev
    I have a class with a method which gets data from a database through a SELECT stored proc. This method uses a SqlDbReader by returning ExecuteReader() on a SqlCommand. The connection and everything is made in this method, with fields (such as connection string) set as class level fields. I now need to populate an array based on the results of this query (so the columns of each row will go into the array with its own index). However, this query will not select all of the data from one table which is involved. I can write the queries to get what I need, but how can I use one connection throughout the class? If I instantiate the connection object and call Open() in the constructor, I get an exception @ runtime. I'm hoping for something like this: // At class level: sqlconn.Open(); // sqlcommand set up Method() { // Fire stored proc // Insert results in a collection } Method2() { // Pass same collection in (use same one), // Add new row columns into same collection } How can I do this with strict performance in mind? Thanks

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  • Can't resignFirstResponder with UITextView

    - by Calvin L
    I have a UITextView. I implemented a navigationBar UIBarButtonItem to respond to a touch and resign the firstResponder for my UITextView. But, when the selector method is called, the keyboard doesn't get dismissed. I checked the UITextView's responder status with isFirstResponder and it returns YES. I also checked it with canResignFirstResponder and the return value is NO. I must be missing something here...why is it returning NO? I get that I can override canResignFirstResponder by subclassing UITextView, but I'd like to avoid that if possible. Here's a code snippet: - (void) commentCancelButtonTouched:(id)sender { NSLog(@"Cancel button touched"); [self.navigationBar popNavigationItemAnimated: NO]; if ([self.textInput.textView canResignFirstResponder] == NO) { NSLog(@"I don't want to resign!"); } [self.textInput.textView resignFirstResponder]; }

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  • ANDing javascript objects together

    - by Jonas
    I ran across this chunk of code (modified) in our application, and am confused to how it works: function someObject() { this.someProperty = {}; this.foo = { bar: { baz: function() { return "Huh?" } } }; this.getValue = function() { return (this.someProperty && this.foo.bar && this.foo.bar.baz && this.foo.bar.baz()) || null; } } function test() { var o = new someObject(); var val = o.getValue(); alert(val); } when you call the test() function, the text "Huh?" is alerted. I'm not sure how the result of getValue is returning that, I would've thought doing A && B && C && D would have returned true, rather than the value of D.

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  • Decoration View *above* cells in UICollectionView

    - by Dhiraj Gupta
    I've got a decoration view showing the way I want, in my UICollectionView. The position and size is right. The decoration view stays at the frame I'm setting for it in my layout. But, I want the decoration view to be above the cells, not below them. I tried setting the zIndex property on the UICollectionViewLayoutAttributes for the decoration view, but this has no effect - I tried logging out the zindex of the cells, and they're all returning 0, and my decoration view's zIndex is set to 20. I'm guessing having decoration views above the cells is not supported, at least in UICollectionViewFlowLayout? Someone please confirm this, thanks! In the meantime, I'm going back to having a custom UIView subclass as a subview in the parent controller of the collection view and laying out the frame of it in the - (void) viewWillLayoutSubviews() method.

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  • How to build an interactive search engine web interface using python

    - by asmaier
    I have build a static web interface for searching data from some tables in my PostgreSQL database. The query website consists of a simple textfield for entering the search term, the result website presents the results as a simple html table. The server side code for searching the PostgreSQL database and returning the results is written in python using psycopg2. Now I would like to add some interactive "Ajax features" to my search engine. When entering the search term I would like to be able to see a list of possible search terms like Google does it. On the results page, I would like to be able to sort the table showing the results. What would be the easiest/recommended way to implement these features for my search engine web site? Do I need a full-fledged web framework like Django for that?

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  • SharePoint Virtual Directories Sitemap

    - by Edison
    I have created and asp.net web site utilizing a web.sitemap file to help with navigation. The site needs to be deployed within a virtual directory inside of our SharePoint intranet site. The problem that I am running in to is that when I request the SiteMap.CurrentNode property, it is returning information from SharePoint's sitemap. Specifically, when i try to get my sitemap's title or description, I am getting information from SharePoint. I have tried re-naming my sitemap and declaring a new Sitemap provider within the web.config. After creating the new sitemap provider and requesting the SiteMap.currentNode, I receive an error message saying that it can't find the web.sitemap file. Any help you can provide would be greatly appreciated.

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  • Wordpress Template get_the_tags() help

    - by Andy
    Hi Guys, I am using this code to get the tags in my wordpress posts for a theme `<?php $posttags = get_the_tags(); if ($posttags) { foreach ($posttags as $tag) { $tagnames[count($tagnames)] = $tag->name; } $comma_separated_tagnames = implode(", ", $tagnames); print_r($comma_separated_tagnames); } ?>` The PROBLEM is that it is returning tags for "all posts" not just individual posts, and I think the problem is that if a post DOESNT have tags - it just inserts tags anyway. Can anyone help modify this so: It return tags only for a post - not all tags If there are no tags for a post, dont return anything ? Really appreciate any help P.S - Can check out here for the wordpress docs

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  • Suppressing default anchor behavior in Safari with jQuery

    - by Macy Abbey
    Hello, I am attempting to prevent default anchor behavior in Safari using the jQuery library. Unfortunately, the standard techniques of returning false or using event.preventDefault() do not seem to be working in Safari. Could anyone help me with this issue? The code I'm working with is like this: $('#main .green-tabs a').live("click",function(event){ $('.green-tabs a').removeClass('active'); $(this).addClass('active'); event.preventDefault(); var that = this; return LolPage(event,that);});

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  • Django template not loading javascript and css properly due to urlpatterns

    - by fmsf
    Hey, When this one runs everything goes fine: (r"^newobject$", "views.myobjects.newobject"), All the CSS + JS files are properly fetched from: static/css/... static/js/... When this one runs: (r"^mybjects/(([a-z]|[A-Z]|[0-9])+)$","views.myobjects.loadobject"), All the css and JS files that are being fetched, are run trough the urlpatterns and are returning my defailt page: (r"", 'views.main.index'), This makes all my CSS and JS code to actualy be HTML. My guess is that i'm giving some noob mistake. Is there any common reason why this should happen? And how to fix it?

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  • Calling linux utilities with options from within a Bash script.

    - by Kyle
    This is my first Bash script so forgive me if this question is trivial. I need to count the number of files within a specified directory $HOME/.junk. I thought this would be simple and assumed the following would work: numfiles= find $HOME/.junk -type f | wc -l echo "There are $numfiles files in the .junk directory." Typing find $HOME/.junk -type f | wc -l at the command line works exactly how I expected it to, simply returning the number of files. Why is this not working when it is entered within my script? Am I missing some special notation when it comes to passing options to the utilities? Thank you very much for your time and help.

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  • How to store javascript variables in iPhone application

    - by sugar
    <script type="text/javascript"> function getSelectionRange() { var sel; if (window.getSelection) { sel = window.getSelection(); if (sel.rangeCount) { return sel.getRangeAt(0); } } else if (document.selection) { return document.selection.createRange(); } return null; } var range; </script> whatShouldBeHere=[wvText stringByEvaluatingJavaScriptFromString:@"getSelectionRange();"]; Here, method getSelectionRange is returning JavaScript Object of Range type. How can I catch & store in plist file in iPhone application ? Thanks in advance for sharing your knowledge. Sagar

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  • Objective C - RegexKitLite - Parsing inner contents of a string, ie: start(.*?)end

    - by Stu
    Please consider the following: NSString *myText = @"mary had a little lamb"; NSString *regexString = @"mary(.*?)little"; for)NSString *match in [myText captureComponentsMatchedByRegex:regexString]){ NSLog(@"%@",match); } This will output to the console two things: 1) "mary had a little" 2) "had a" What I want is just the 2nd bit of information "had a". Is there is a way of matching a string and returning just the inner part? I'm fairly new to Objective C, this feels a rather trivial question yet I can't find a less messy way of doing this than incrementing an integer in the for loop and on the second iteration storing the "had a" in an NSString.

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  • return new string vs .ToString()

    - by Leroy Jenkins
    Take the following code: public static string ReverseIt(string myString) { char[] foo = myString.ToCharArray(); Array.Reverse(foo); return new string(foo); } I understand that strings are immutable, but what I dont understand is why a new string needs to be called return new string(foo); instead of return foo.ToString(); I have to assume it has something to do with reassembling the CharArray (but thats just a guess). Whats the difference between the two and how do you know when to return a new string as opposed to returning a System.String that represents the current object?

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  • Regular Expression Help in .NET

    - by Matt H.
    I have a simple pattern I am trying to match, any characters captured between parenthesis at the end of an HTML paragraph. I am running into trouble any time there is additional parentheticals in that paragraph: i.e. If the input string is "..... (321)</p" i want to get the value (321) However, if the paragraph has this text: "... (123) (321)</p" my regex is returning "(123) (321)" (everything between the opening "(" and closing ")" I am using the regex pattern "\s(.+)</p" How can I grab the correct value (using VB.NET) This is what I'm doing so far: Dim reg As New Regex("\s\(.+\)</P>", RegexOptions.IgnoreCase) Dim matchC As MatchCollection = reg.Matches(su.Question) If matchC.Count > 0 Then Dim lastMatch As Match = matchC(matchC.Count - 1) Dim DesiredValue As String = lastMatch.Value End If

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  • How to execute an update via SQLQuery in Hibernate

    - by Udo Fholl
    Hi, I need to update a joined sub-class. Since Hibernate doesn't allow to update joined sub-classes in hql or named-query I want to do it via SQL. I also can't use a sql named-query because updates via named-query are not supported in Hibernate. So I decided to use a SQLQuery. But Hibernate complaints about not calling addScalar(). Are updates returning the number of rows affected and how is named that column? Are there any other ways to do an update on a joined sub-class in hibernate? Thanks in advance!

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  • Null Pointer Exception while using Java Compiler API

    - by java_geek
    MyClass.java: package test; public class MyClass { public void myMethod(){ System.out.println("My Method Called"); } } Listing for SimpleCompileTest.java that compiles the MyClass.java file. SimpleCompileTest.java: package test; import javax.tools.*; public class SimpleCompileTest { public static void main(String[] args) { String fileToCompile = "test" + java.io.File.separator +"MyClass.java"; JavaCompiler compiler = ToolProvider.getSystemJavaCompiler(); int compilationResult = compiler.run(null, null, null, fileToCompile); if(compilationResult == 0){ System.out.println("Compilation is successful"); }else{ System.out.println("Compilation Failed"); } } } I am executing the SimpleCompileTest class and getting a NullPointerException. The ToolProvider.getSystemJavaCompiler() is returning null. Can someone tell me what is wrong with the code

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  • Future proofing client-server code?

    - by Koran
    Hi, We have a web based client-server product. The client is expected to be used in the upwards of 1M users (a famous company is going to use it). Our server is set up in the cloud. One of the major questions while designing is how to make the whole program future proof. Say: Cloud provider goes down, then move automatically to backup in another cloud Move to a different server altogether etc The options we thought till now are: DNS: Running a DNS name server on the cloud ourselves. Directory server - The directory server also lives on the cloud Have our server returning future movements and future URLs etc to the client - wherein the client is specifically designed to handle those scenarios Since this should be a usual problem, which is the best solution for the same? Since our company is a very small one, we are looking at the least technically and financially expensive solution (say option 3 etc)? Could someone provide some pointers for the same? K

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