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• Is it possible to use Boehm garbage collector only for the part of the program?

  - by bialix

  I've read article in LinuxJournal about Boehm-Demers-Weiser garbage collector library. I'm interesting to use it in my library instead of my own reference counting implementation. I have only one question: is it possible to use gc only for my shared library and still use malloc/free in the main application? I'm not quite understand how gc checks the heap so I'm worrying about performance of gc in that case and possible side effects.

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• .NET --- Textbox control - wait till user is done typing

  - by Cj Anderson

  Greetings all, Is there a built in way to know when a user is done typing into a textbox? (Before hitting tab, Or moving the mouse) I have a database query that occurs on the textchanged event and everything works perfectly. However, I noticed that there is a bit of lag of course because if a user is quickly typing into the textbox the program is busy doing a query for each character. So what I was hoping for was a way to see if the user has finished typing. So if they type "a" and stop then an event fires. However, if they type "all the way" the event fires after the y keyup. I have some ideas floating around my head but I'm sure they aren't the most efficient. Like measuring the time since the last textchange event and if it was than a certain value then it would proceed to run the rest of my procedures. let me know what you think. Language: VB.NET Framework: .Net 2.0 --Edited to clarify "done typing"

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• What C# data types can be nullable types?

  - by Randy Minder

  Can someone give me a list, or point me to where I can find a list of C# data types that can be a nullable type? For example: I know that Nullable<int> is ok I know that Nullable<byte[]> is not. I'd like to know which types are nullable and which are not. BTW, I know I can test for this at runtime. However, this is for a code generator we're writing, so I don't have an actual type. I just know that a column is "string" or "int32" etc. Thanks.

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• Dreamweaver utf-8 encoded php page displays wrong chinese character in IE and Chrome, correct in FF

  - by user1334485

  I have an issue with character encoding: I have this page: http://www.studiomille.jp/class/ (its in japanese but the character in question is from chinese i think) FF shows it correctly, IE (all versions) and Chrome doesn't (sorry larger screenshots): FF Screenshot: IE Screenshot: (there are other character that are different throughout the site, this is just one example) Everything is set to UTF-8: * PHP sends header: Content-Type:text/html; charset=UTF-8 * PHP starts with: mb_language('uni'); mb_internal_encoding('UTF-8'); * meta tag: <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> * all files are saved with UTF-8 encoding with DreamWeaver CS3 * the same font is used in all the browsers. On that page nothing comes from the db, everything is hard coded. The site has the same behavior on my localhost too. So why only FF gets it right and how can I make it work on IE also?

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• How would I design this table in SQL?

  - by RSharma

  I have a parent master table that is generic enough to hold the common information of the children. Since the children were substantially different, we created separate tables for them. So I have something like this: tblMaster -------- MasterID int Name varchar(50) --Common to all children and there are a bunch of fields like this ChildType int -- Type of Child either ChildOne or ChildTwo ChildID int -- need to store ChildOneID or ChildTwoID depending on type of Child, so that i can refer to children tblChild1 -------- ChildOneID int IDENTITY tblChild2 --------- ChildTwoID int IDENTITY Should I have a ChildID in the master that is either ChildOneID or ChildTwoID based on the ChildType column? I have a number of children and I have simplified it for this question. The other way is to add ChildOneID and ChildTwoID as columns in the master, but since i have a number of columns, I will have a lot of null columns EDIT: Any help is appreciated

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• Swapping two jQuery draggable list items not working properly (with jsFiddle example)

  - by Tony_Henrich

  The minimalist working example below swaps the two boxes when box 'one' is dragged and dropped on box 'two'. The problem is that when box 'one' is dropped, its style has 'top' & 'left' values causing it to be placed away from where it should drop. Its class includes 'ui-draggable-dragging'. It seems the top & left values are related to the amount the elements were dragged before the drop. And the dragging was 'interrupted' hence the residual 'ui-draggable-dragging' class? What am I missing to make the swap work seamlessly? full jsfiddle example here <html> <head> <script type="text/javascript" src="includes/jquery-1.4.2.min.js"></script> <script type="text/javascript" src="includes/jquery-ui-1.8.2.custom.min.js"></script> <script type="text/javascript"> jQuery.fn.swapWith = function(to) { return this.each(function() { var copy_to = $(to).clone(true); var copy_from = $(this).clone(true); $(to).replaceWith(copy_from); $(this).replaceWith(copy_to); }); }; $(document).ready(function() { options = {revert: true}; $("li").draggable(options) $('#wrapper').droppable({ drop: function(event, ui) { $(ui.draggable).swapWith($('#two')); } }); }); </script> </head> <body> <form> <ul id="wrapper"> <li id='one'> <div style="width: 100px; height: 100px; border: 1px solid green"> one<br /></div> </li> <li id='two'> <div style="width: 110px; height: 110px; border: 1px solid red"> two<br /></div> </li> </ul> <br /> </form> </body> </html>

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• Mac OSX: Passing a file from user process to kernel module.

  - by Inso Reiges

  Hello, I need to pass a link to file from a user process to the OSX kernel driver. By link i mean anything that uniquely identifies a file on the local filesystem. I need that link to do I/O on that file in kernel. The most obvious solution seems to pass a file name and use a VFS vnode lookup. However i noticed, that Apple Disk Images helper process passes a raw data array for image-path property to driver when attaching a disk image file: <2f 56 6f 6c 75 6d 65 73 2f 73 74 6f 72 61 67 65 2f 74 65 73 74 32 2e 64 6d 67> What is that diskimages-helper passes to the kernel driver? Some serialized type perhaps? If yes, what type is it and how can i use it?

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• Void pointer values comparing C++

  - by user2962977

  My actual question is it really possible to compare values contained in two void pointers, when you actually know that these values are the same type? For example int. void compVoids(void *firstVal, void *secondVal){ if (firstVal < secondVal){ cout << "This will not make any sense as this will compare addresses, not values" << endl; } } Actually I need to compare two void pointer values, while outside the function it is known that the type is int. I do not want to use comparison of int inside the function. So this will not work for me as well: if (*(int*)firstVal > *(int*)secondVal) Any suggestions? Thank you very much for help!

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• iPhone OS SDK: Possible to download SDK 3.0 w/o Xcode?

  - by Cirrostratus

  I recently downloaded the iPhone SDK 4 along with Xcode and neglected to install 3.0 and 3.1. I've since deleted the install package. I of course can re-download the whole package, but for future reference, I wonder if you are able to download individual SDK versions separately and independent of Xcode, like you would with almost any open source package.

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• ASP.NET masterpage public variables error

  - by eugeneK

  I have public variable 'MessagePlaceholder' on MasterPage and a Class that accesses this property like that setting it's value to string from getMessage(); ((HttpContext.Current.Handler as System.Web.UI.Page).Master as MasterPage).MessagePlaceholder = getMessage(); which gives me an error like this one Error 3 'System.Web.UI.MasterPage' does not contain a definition for 'MessagePlaceholder' and no extension method 'MessagePlaceholder' accepting a first argument of type 'System.Web.UI.MasterPage' could be found (are you missing a using directive or an assembly reference?) What should i do ?

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• adding a dll to a VS 2008 Win32 application

  - by Ayusman

  Hi, I have created a project VC++ in VS 2008. I want to call a certain function in an external dll. How can I add the reference/resource [I am a java guy please forgive if I am using the wrong terms here] to my project so that I can call the functions in the dll. I have gone through several forums and yet have not found a clear solution. Please help. TIA Ayusman

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• Basic date/time manipulation in NHiberate query

  - by Yann Trevin

  I'm trying to restrict my NHibernate query with some basic date/time manipulation. More specifically, I want to execute the following statement (pseudo-SQL): select * from article where created_on + lifespan >= sysdate with: created_on is mapped to a property of type DateTime. lifespan is mapped to a property of type TimeSpan. sysdate is the current date/time (of the database server or ofthe application host, I don't care) Is there any built-in way to do that by using the Criteria-API or HQL? return session .CreateCriteria<Article>() .Add( ? ) .List<Article>();

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• jQuery AJAX POST gives undefined index

  - by Sebastian

  My eventinfo.php is giving the following output: <br /> <b>Notice</b>: Undefined index: club in <b>/homepages/19/d361310357/htdocs/guestvibe/wp-content/themes/yasmin/guestvibe/eventinfo.php</b> on line <b>11</b><br /> [] HTML (index.php): <select name="club" class="dropdown" id="club"> <?php getClubs(); ?> </select> jQuery (index.php): <script type="text/javascript"> $(document).ready(function() { $.ajax({ type: "POST", url: "http://www.guestvibe.com/wp-content/themes/yasmin/guestvibe/eventinfo.php", data: $('#club').serialize(), success: function(data) { $('#rightbox_inside').html('<h2>' + $('#club').val() + '<span style="font-size: 14px"> (' + data[0].day + ')</h2><hr><p><b>Entry:</b> ' + data[0].entry + '</p><p><b>Queue jump:</b> ' + data[0].queuejump + '</p><br><p><i>Guestlist closes at ' + data[0].closing + '</i></p>'); }, dataType: "json" }); }); $('#club').change(function(event) { $.ajax({ type: "POST", url: "http://www.guestvibe.com/wp-content/themes/yasmin/guestvibe/eventinfo.php", data: $(this).serialize(), success: function(data) { $('#rightbox_inside').hide().html('<h2>' + $('#club').val() + '<span style="font-size: 14px"> (' + data[0].day + ')</h2><hr><p><b>Entry:</b> ' + data[0].entry + '</p><p><b>Queue jump:</b> ' + data[0].queuejump + '</p><br><p><i>Guestlist closes at ' + data[0].closing + '</i></p>').fadeIn('500'); }, dataType: "json" }); }); </script> I can run alerts from the jQuery, so it is active. I've copied this as is from an old version of the website, but I've changed the file structure (through to move to WordPress) so I suspect the variables might not even be reaching eventinfo.php in the first place... index.php is in wp-content/themes/cambridge and eventinfo.php is in wp-content/themes/yasmin/guestvibe but I've tried to avoid structuring issues by referencing the URL in full. Any ideas?

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• What version of mongodb was full $text query operator introduced?

  - by Marc Maxson

  Stupid question, right? But the official docs for 'text index' say: http://docs.mongodb.org/manual/core/index-text/ Text Indexes New in version 2.4. To perform queries that access the text index, use the $text query operator. Whereas if you click on the help for searching the index you created with the $text operator, it reads: http://docs.mongodb.org/manual/reference/operator/query/text/#op._S_text $text New in version 2.6. Seems to be 2.4 but still having problems wiht it.

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• Using JSON Data to Populate a Google Map with Database Objects

  - by MikeH

  I'm revising this question after reading the resources mentioned in the original answers and working through implementing it. I'm using the google maps api to integrate a map into my Rails site. I have a markets model with the following columns: ID, name, address, lat, lng. On my markets/index view, I want to populate a map with all the markets in my markets table. I'm trying to output @markets as json data, and that's where I'm running into problems. I have the basic map displaying, but right now it's just a blank map. I'm following the tutorials very closely, but I can't get the markers to generate dynamically from the json. Any help is much appreciated! Here's my setup: Markets Controller: def index @markets = Market.filter_city(params[:filter]) respond_to do |format| format.html # index.html.erb format.json { render :json => @market} format.xml { render :xml => @market } end end Markets/index view: <head> <script type="text/javascript" src="http://www.google.com/jsapi?key=GOOGLE KEY REDACTED, BUT IT'S THERE" > </script> <script type="text/javascript"> var markets = <%= @markets.to_json %>; </script> <script type="text/javascript" charset="utf-8"> google.load("maps", "2.x"); google.load("jquery", "1.3.2"); </script> </head> <body> <div id="map" style="width:400px; height:300px;"></div> </body> Public/javascripts/application.js: function initialize() { if (GBrowserIsCompatible() && typeof markets != 'undefined') { var map = new GMap2(document.getElementById("map")); map.setCenter(new GLatLng(40.7371, -73.9903), 13); map.addControl(new GLargeMapControl()); function createMarker(latlng, market) { var marker = new GMarker(latlng); var html="<strong>"+market.name+"</strong><br />"+market.address; GEvent.addListener(marker,"click", function() { map.openInfoWindowHtml(latlng, html); }); return marker; } var bounds = new GLatLngBounds; for (var i = 0; i < markets.length; i++) { var latlng=new GLatLng(markets[i].lat,markets[i].lng) bounds.extend(latlng); map.addOverlay(createMarker(latlng, markets[i])); } } } window.onload=initialize; window.onunload=GUnload;

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• How to Make ESC exits full-screen mode in Trusted Application?

  - by Jeaffrey Gilbert

  One consequence of the keyboard-restriction change is that pressing ESC will not exit full-screen mode in trusted applications. This enables you to use the ESC key for other functionality. However, you must provide your own user interface for exiting full-screen mode. Reference: http://msdn.microsoft.com/en-us/library/ee721083(v=VS.95).aspx#fullscreen_support I need to make pressing ESC will exit from full-screen mode in trusted application without provide a UI control in all pages. Please give me hints, thank you.

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• Makefile issue with compiling a C++ program

  - by Steve

  I recently got MySQL compiled and working on Cygwin, and got a simple test example from online to verify that it worked. The test example compiled and ran successfully. However, when incorporating MySQL in a hobby project of mine it isn't compiling which I believe is due to how the Makefile is setup, I have no experience with Makefiles and after reading tutorials about them, I have a better grasp but still can't get it working correctly. When I try and compile my hobby project I recieve errors such as: Obj/Database.o:Database.cpp:(.text+0x492): undefined reference to `_mysql_insert_id' Obj/Database.o:Database.cpp:(.text+0x4c1): undefined reference to `_mysql_affected_rows' collect2: ld returned 1 exit status make[1]: *** [build] Error 1 make: *** [all] Error 2 Here is my Makefile, it worked with compiling and building the source before I attempted to put in MySQL support into the project. The LIBMYSQL paths are correct, verified by 'mysql_config'. COMPILER = g++ WARNING1 = -Wall -Werror -Wformat-security -Winline -Wshadow -Wpointer-arith WARNING2 = -Wcast-align -Wcast-qual -Wredundant-decls LIBMYSQL = -I/usr/local/include/mysql -L/usr/local/lib/mysql -lmysqlclient DEBUGGER = -g3 OPTIMISE = -O C_FLAGS = $(OPTIMISE) $(DEBUGGER) $(WARNING1) $(WARNING2) -export-dynamic $(LIBMYSQL) L_FLAGS = -lz -lm -lpthread -lcrypt $(LIBMYSQL) OBJ_DIR = Obj/ SRC_DIR = Source/ MUD_EXE = project MUD_DIR = TestP/ LOG_DIR = $(MUD_DIR)Files/Logs/ ECHOCMD = echo -e L_GREEN = \e[1;32m L_WHITE = \e[1;37m L_BLUE = \e[1;34m L_RED = \e[1;31m L_NRM = \e[0;00m DATE = `date +%d-%m-%Y` FILES = $(wildcard $(SRC_DIR)*.cpp) C_FILES = $(sort $(FILES)) O_FILES = $(patsubst $(SRC_DIR)%.cpp, $(OBJ_DIR)%.o, $(C_FILES)) all: @$(ECHOCMD) " Compiling $(L_RED)$(MUD_EXE)$(L_NRM)."; @$(MAKE) -s build build: $(O_FILES) @rm -f $(MUD_EXE) $(COMPILER) -o $(MUD_EXE) $(L_FLAGS) $(O_FILES) @echo " Finished Compiling $(MUD_EXE)."; @chmod g+w $(MUD_EXE) @chmod a+x $(MUD_EXE) @chmod g+w $(O_FILES) $(OBJ_DIR)%.o: $(SRC_DIR)%.cpp @echo " Compiling $@"; $(COMPILER) -c $(C_FLAGS) $< -o $@ .cpp.o: $(COMPILER) -c $(C_FLAGS) $< clean: @echo " Complete compile on $(MUD_EXE)."; @rm -f $(OBJ_DIR)*.o $(MUD_EXE) @$(MAKE) -s build I like the functionality of the Makefile, instead of spitting out all the arguments etc, it just spits out the "Compiling [Filename]" etc. If I add -c to the L_FLAGS then it compiles (I think) but instead spits out stuff like: g++: Obj/Database.o: linker input file unused because linking not done After a full day of trying and research on google, I'm no closer to solving my problem, so I come to you guys to see if you can explain to me why all this is happening and if possible, steps to solve. Regards, Steve

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• What version of Apache HTTP Client is bundled in Android 1.6?

  - by Benju

  I want to have a seperate project that runs my server communication code in a normal JVM for the purposes of integration testing. This code uses these libraries which are build into the Android Framework... http://developer.android.com/reference/org/apache/http/client/package-summary.html Does anybody know what version of Apache HTTP Client this is supposed to be? I want to run it without the Android tests which are painfully slow.

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• argparse coding issue

  - by Carl Skonieczny

  write a script that takes two optional boolean arguments,"--verbose‚" and ‚"--live", and two required string arguments, "base"and "pattern". Please set up the command line processing using argparse. This is the code I have so far for the question, I know I am getting close but something is not quite right. Any help is much appreciated.Thanks for all the quick useful feedback. def main(): import argparse parser = argparse.ArgumentParser(description='') parser.add_argument('base', type=str) parser.add_arguemnt('--verbose', action='store_true') parser.add_argument('pattern', type=str) parser.add_arguemnt('--live', action='store_true') args = parser.parse_args() print(args.base(args.pattern))

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• conditionals in wordpress

  - by pablo

  Why this code works fine: <?php if (**is_page**('4')) { ?> <style type="text/css"> body {background-image:url("<?php bloginfo('template_url'); ?>/images/bac4.jpg");} </style> <?php } else ?> and this not: <?php if (**is_category**()) { ?> <style type="text/css"> body {background-image:url("<?php bloginfo('template_url'); ?>/images/coaching.jpg");} </style> <?php } else ?>

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• attaching a file path in a html form

  - by sushant

  <form><label for="attachment">Attachment:</label> <input type="file" name="attachment" id="attachment"><input type="submit"></form> i want to attach the file path to a form. i am doing it using the following code. but i want that the pop up window should open to a specified path. say D:\newfolder, so that user need not go to D: and then newfolder to attach the file. is there any way i can set this predefined path. any help is really appreciated and also i am really sorry for formatting , i dont know how to format it.

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• Find selected WPF Listbox entries

  - by wonea

  I've been trying iterate through the selected items of a listbox in WPF, with the following code; try { for (int i = 0; i < mylistbox.SelectedItems.Count; i++) { ListItem li = (ListItem)mylistbox.SelectedItems[i]; string listitemcontents_str = li.ToString(); } } catch(Exception e) { // Error appears here string error = e.ToString(); } However I receive an invalid cast exception; System.InvalidCastException: Unable to cast object of type 'mylist' to type 'System.Windows.Documents.ListItem'. Is there a way around this?

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• How do I get the CPU speed and total physical ram in C#?

  - by edude05

  I need a simple way of checking how much ram and fast the CPU of the host PC is. I tried WMI however the code I'm using private long getCPU() { ManagementClass mObject = new ManagementClass("Win32_Processor"); mObject.Get(); return (long)mObject.Properties["MaxClockSpeed"].Value; } Throws a null reference exception. Furthermore, WMI queries are a bit slow and I need to make a few to get all the specs. Is there a better way?

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• Model-layer validation in Doctrine, Symfony

  - by Andree

  Hi there, I have a schema.yml containing something similiar to the following: Character: tableName: characters actAs: { Timestampable: ~ } columns: id: { type: integer(4), primary: true, autoincrement: true } name: { type: string(255), notnull: true, notblank: true, minlength: 3 } I define the minlength of the column name to be 3. I created a unit test to test the minlength validation, and I found out that the validation is not working. $character = new Character(); $character->set('name', 'Dw'); $t->ok(! $character->isValid()); # This test failed Can someone tell me what might be the problem here? Thanks, Andree

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• Is it valid to replace http:// with // in a <script src="http://...">?

  - by Darryl Hein

  I have the following tag: <script type="text/javascript" src="https://cdn.example.com/js_file.js"></script> In this case the site is HTTPS, but the site may also be just HTTP. (The JS file is on another domain.) I'm wondering if it's valid to do the following for convenience sake: <script type="text/javascript" src="//cdn.example.com/js_file.js"></script> I'm wondering if it's valid to remove the http: or https: ? It seems to work everywhere I have tested, but are there any cases where it doesn't work?

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