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• Dry length of buoy in OrcaFlex

  - by KAE

  I use a software package called OrcaFlex to model the behavior of a buoy in ocean waves. I would like to share OrcaFlex questions in this forum - hope some users are out there! Here is a starter question: For a 6D buoy, I extracted the 'Dry Length' after the simulation completed. The value of the Dry Length sometimes slightly exceeds the actual height of the buoy, even though this would not seem to be possible given the formula from the manual, Dry Length = (cylinder length) × (cylinder volume above surface) / (cylinder total volume). Any insights?

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• Errors when using a Ruby On Rails scaffold with a data type of interger

  - by bublebboy

  I am learning Ruby On Rails. I am on a shared hosting with Ruby version 1.8.1 and Rails version 2.3.10. I am working my way through a tutorial at http://railstutorial.org/chapters/a-demo-app?version=2.3#top and at one point in the tutorial it has me run: script/generate scaffold Micropost content:string user_id:interger The tutorial is using the default database, SQLite3. The command works and I use rake db:migrate to create the database. I can view the page listing the microposts (which is empty), but when I try to add a micropost (microposts/new) I get an error undefined method `user_id' for #<Micropost:0x7f710e4988e8> After doing some testing on my own it seems I experience the problem by using the data type of interger. While I understand that using a scaffold is not the best way of building a ruby on rails, I'm just beginning and would still like to know why I am experiencing this problem to help me better understand how rails works.

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• Unable to access static var from Document Class in AS3

  - by omidomid

  I have a Document class called "CityModule", and an asset with class "City". Below is the coe for each. For some reason, I am unable to access the static variables of the City class from CityModule: CityModule.as: package { public class CityModule extends MovieClip { public function CityModule() { var buildings:Array = City.getBuildings(); } } } } City.as: package { import flash.display.MovieClip; public class City extends MovieClip { private static var _buildings:Array = [ {className:'City.Generic1', type:'generic'}, {className:'City.Generic2', type:'generic'}, {className:'City.Generic3', type:'generic'} ]; public function City(){ //empty } public static function getBuildings():Array{ return _buildings; } } } Doing this gives me a "Call to a possibly undefined method getBuildings" error. If I instantiate an instance of City, I can see any public/ getters/ setters perfectly fine. But static isn't working...

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• Pop current directory until specific file is found

  - by edarroyo

  I'm interested in writing a script with the following behavior: See if a file, build.xml, exists in the current directory, if so run a command supplied through arguments to the script. If not, pop the current directory and look at the parent. Go to 1. The script would end once we find the file or we reach the root. Also, once the script finishes and control comes back to the user I want the current directory to be that one where the script was initially l I'm not very familiar with shell scripting but any help/guidance will be much appreciated.

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• Uploading to YouTube makes all browser tabs and devices disconnect

  - by fabsenet

  Whenever I upload a video to YouTube all other browser tabs behave like there is no connection at all. It even affects my phone and other computers on the network therefor I think it has to do with my router. When the upload is done everything works normally again. I never observed this behavior with any other upload. My router is a Fritz!Box 7390 and my uploading PC is connected through a 1000mb/s switch (wired) to the router. Uploading through another browser does not change anything. I understand that other sites become slow as the network resources are limited, but stopping altogether feels wrong. speed.io measures for my internet connection: 40.894 Kbit/s down, 2.685 Kbit/s up, 29 ms ping, 2.048 con/m connects

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• How do I set up my @product=Product.find(params[:id]) to have a product_url?

  - by montooner

  Trying to recreate { script/generate scaffold }, and I've gotten thru a number of Rails basics. I suspect that I need to configure default product url somewhere. But where do I do this? Setup: Have: def edit { @product=Product.find(params[:id]) } Have edit.html.erb, with an edit form posting to action = :create Have def create { ... }, with the code redirect_to(@product, ...) Getting error: undefined method `product_url' for #< ProductsController:0x56102b0 My def update: def update @product = Product.find(params[:id]) respond_to do |format| if @product.update_attributes(params[:product]) format.html { redirect_to(@product, :notice => 'Product was successfully updated.') } format.xml { head :ok } else format.html { render :action => "edit" } format.xml { render :xml => @product.errors, :status => :unprocessable_entity } end end end

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• Macbook Air Reboot after Wake when Windows 7 Running in VM

  - by rfastturnlow

  Is anyone who is running a Windows 7 VM on a new 2011 i5 Macbook Air (I have the 13" w/128 SSD) able to put their Macbook air to sleep for extended periods of time (like overnight) without manually shutting down or suspending a VM that's running in Parallels, VMware Fusion or VirtualBox? I've tried all three virtualization products with no success. With all three, if I forget to manually shutdown or suspend the VM, OSX reboots when I try and wake the Macbook. Same goes if I try and use the Deep Sleep widget. Parallels support openly admitted that this was an issue and thankfully gave me a refund. I've also tried the trial version of VMware and VirtualBox, but the behavior is the same. Should I just give up or is anyone out there having more success at this?

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• not able to close other opened tab in browser

  - by tulsi

  hi please check the below code i am trying to open tab with name and after that try to close that tab but unable to close or else can anyone tell how we can close opened all tab (url1,url2) from parent tab (url) while close parent tab error in firebug is my_window is undefined <form name="submitForm1" target="my_window" method="POST" action="http://localhost:8080/ADDMIBREP/"> <input type="hidden" name="uname" value="uname"> <a HREF="javascript:document.submitForm1.submit();">ADDMIBREPORT</a> </form> <a HREF="javascript: closepopup() ">remove</a> </body> <script> function closepopup() { alert("hi"); if(false == my_window.closed) { my_window.close (); } else { alert('Window already closed!'); } } <script>

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• Mozilla nonsense. Page changes size by itself

  - by Browser Madness

  I have never intentionally changed the size of font on latest mozilla browser install on windows machine. For example Google site is now 200% size, and I did nothing to make this happen. Whats worse is it does not change back but remembers this! Similarly other sites are too small and they remember this per site. What is going on here? I mean what nonsense! How can I undo this? And for extra points who came up with this absurd behavior at mozilla? Not making this up folks. 15.0.1 Not at all clear why it changes size or how to go back to default size for these sites Acutally it just happened again while editing this entry. Icon changes and than font size is too small.

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• Can't use static const as param in function call within binding tags in Flex 3

  - by buzzer

  I'm having a problem in flex 3 where if a static const I have defined is used as the parameter to a function call within binding tags I get a "1120: Access of undefined property NodePropertyMatrix". _propMtx is a ArrayCollection. <mx:HBox visible="{_propMtx.getItemAt(NodePropertyMatrix.srcParent)}"> Above code throws the error, but the following code does not <mx:HBox visible="{NodePropertyMatrix.srcParent}"> NodePropertyMatrix is an AS class as follows: package model.constants { import mx.collections.ArrayCollection; public class NodePropertyMatrix { public static const srcParent:Number = 0; } } Anyone know what is wrong here?

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• Binding backward-kill-word to Ctrl+w

  - by nocturnal

  I'm trying to switch from prolonged use of Tcsh to recent exploration of Bash. I've managed to port over all my favorite features, except for Ctrl+w which treats spaces and slashes as word boundaries, most likely backward-kill-word. In Bash however readline deletes all the way to the first space, deleting all slashes between. I've tried many various combinations of \C-w: backward-kill-word in both .inputrc and .bashrc using bind but I can't get it to work the way I want. Funny enough, through Putty from Windows at work I can use Alt+Backspace, which also the manual says is the default binding, to produce the exact behavior I want. But in Terminal.app on my Macs at home this does not work. Same goes for any FreeBSD or Linux server I happen to be logged into from Terminal.app. So I turn to superuser for help.

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• Vim Misbehaving

  - by zchtodd

  I'm not sure what changed, but lately Vim has been driving me nuts. Whenever I try to do a column mode insert, vim takes my current character and adds to the last character I inserted. For example, the first time I do a block comment by inserting # on multiple lines, it works fine. The next time, however, I end up with ## inserted on every line, and the problem just compounds from there. To do this, I'm hitting Ctrl-V, down or up arrow, Shift-I, #, and then Esc. This worked for months, but now it seems to be pasting extra stuff in. I've tried disabling all .vimrc files, but the behavior remains the same. Any ideas?

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• jquery find method

  - by yoda

  Hi, I have a function called using an anchor inside a form, and I need to get the values of the inputs inside the same form to perform certain actions. Problem is, the result is always undefined. Here's the code : $('#create_alert').live('click', function(e) { var form = $(this).parent().get(0); var id = $(form).find('input[name="id"]').val(); alert(id); }); .. and the context : <form name="create_alert"> <input type="hidden" name="id" value="1" /> <a href="#" type="text" id="create_alert" class="search-submit">CRIAR ALERTA</a> </form> Thoughts?

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• Jquery get array details

  - by Matt

  I'm having trouble getting a response back from a Jquery ajax call... (It's a script to authenticate a user, and needs to return their name and user ID. My understanding was that I could encode it as JSON and get the data in the format below. It is returning an error of "undefined" for the alert(). The javascript $.ajax({ type: "POST", url: "myURL.php", data: {username: username, password: password}, success: function(results) { //THIS IS WHERE THE PROBLEM IS alert('Hi '+results.name); //Should be "Hi Basil Fawlty" } }); The PHP (myURL.php) //This comes from a SQL call that returns the following name json_encode(array( 'id'=>1, 'name'=>'Basil Fawlty' )); Any help or ideas on where I am going wrong would be greatly appreciated! Thanks.

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• Stop moving page title in Firefox?

  - by lilydjwg

  Some websites I'm using always make the web title move or blink when, for example, a new mail has just arrived. It is really disturbing as it's not an emergency and usually I'm busy browsing other pages. I can't stand it any longer, but I have to use those services. I want to stop this kind of behavior either by installing a new extension or writing a Greasemonkey script. But I can't find one and have no idea about how to detect and stop the JavaScript code. What is the solution?

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• IE8 Stopped Keeping History

  - by BillP3rd

  Like the title says, apparently my IE8 has stopped keeping the history of pages I've visited. I've searched SU and Google and can't find anything that seems to describe what I'm seeing. I have IE set to retain history for 999 days (the maximum allowed): As you can see below, apart from today and last Thursday, IE appears to be oblivious to any activity more recent than three weeks ago. Clicking on either "Thursday" or "Today" reveals no recorded history, however. Very odd behavior. Finally, the history does extend back 30 weeks to when I built the computer, and there is recorded history for every week. I'd appreciate suggestions. NB. Windows 7 Ultimate, x64 (but 32-bit IE8).

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• Compiling zlib for 64 bit on windows

  - by Allan Hollenberg

  I am currently working on a cross-platform game for Mac OSX and Windows and I'm having some issues with the ZLib library on Windows 64 bit. My game is focussed on a 64 bit architecture and I am unable to get ZLib to work along with it. When I compile ZLib itself (through make all64 at the source directory of ZLib) it shows no issues but when I want to use it I get a error saying '/usr/local/lib/libz.a(gzread.o):gzread.c:(.text+0x28e): undefined reference to `__errno'' I have included errno.h before I include zlib.h in my project but that doesn't seem to matter. I am compiling my app through the cygwin64 terminal and using the x86_64-w64-mingw32-g++ command, I am also linking directly against the lib64 version (if I remove that it compiles correctly but crashes on running due to it having a x86 lib)

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• What am I missing in my compilation / linking stage of this C++ FreeType GLFW application?

  - by anon

  g++ -framework OpenGL GLFT_Font.cpp test.cpp -o test -Wall -pedantic -lglfw -lfreetype - pthread `freetype-config --cflags` Undefined symbols: "_GetEventKind", referenced from: __glfwKeyEventHandler in libglfw.a(macosx_window.o) __glfwMouseEventHandler in libglfw.a(macosx_window.o) __glfwWindowEventHandler in libglfw.a(macosx_window.o) "_ShowWindow", referenced from: __glfwPlatformOpenWindow in libglfw.a(macosx_window.o) "_MenuSelect", referenced from: This is on Mac OS X. I am trying to get GLFT_FONT to work on MacOSX with GLFW and FreeType2. This is not the standard Makefile. I changed parts of it myself (like the "-framework OpenGL" I am from Linux land, a bit new to Mac. I am on Mac OS X 10.5.8; using XCode 3.1.3 Thanks!

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• Select dropdown with fixed width cutting off content in IE

  - by aaandre

  The issue: Some of the items in the select require more than the specified width of 145px in order to display fully. Firefox behavior: clicking on the select reveals the dropdown elements list adjusted to the width of the longest element. IE6 & IE7 behavior: clicking on the select reveals the dropdown elements list restricted to 145px width making it impossible to read the longer elements. The current UI requires us to fit this dropdown in 145px and have it host items with longer descriptions. Any advise on resolving the issue with IE? The top element should remain 145px wide even when the list is expanded. Thank you! The css: select.center_pull { background:#eeeeee none repeat scroll 0 0; border:1px solid #7E7E7E; color:#333333; font-size:12px; margin-bottom:4px; margin-right:4px; margin-top:4px; width:145px; } Here's the select input code (there's no definition for the backend_dropbox style at this time) <select id="select_1" class="center_pull backend_dropbox" name="select_1"> <option value="-1" selected="selected">Browse options</option> <option value="-1">------------------------------------</option> <option value="224">Option 1</option> <option value="234">Longer title for option 2</option> <option value="242">Very long and extensively descriptive title for option 3</option> </select> Full html page in case you want to quickly test in a browser: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>dropdown test</title> <style type="text/css"> <!-- select.center_pull { background:#eeeeee none repeat scroll 0 0; border:1px solid #7E7E7E; color:#333333; font-size:12px; margin-bottom:4px; margin-right:4px; margin-top:4px; width:145px; } --> </style> </head> <body> <p>Select width test</p> <form id="form1" name="form1" method="post" action=""> <select id="select_1" class="center_pull backend_dropbox" name="select_1"> <option value="-1" selected="selected">Browse options</option> <option value="-1">------------------------------------</option> <option value="224">Option 1</option> <option value="234">Longer title for option 2</option> <option value="242">Very long and extensively descriptive title for option 3</option> </select> </form> </body> </html>

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• Some search keywords in the omnibox have stopped working

  - by pinouchon

  My problem in the same as described here: http://productforums.google.com/forum/#!topic/chrome/HE7ak4y92YU When I type a search in the chrome omnibox, after typing enfr [space] chrome replaces it by a search in the history and I end up googling my search prefixed by the keyword : for example, I end up googling "enfr former", instead of translating "former" from engligh into french. (in my case, the search is the folowing name: enfr, keywoard: enfr, search: http://translate.google.fr/#en/fr/%s in the other search engines options) Chrome version: 21.0.1180.89 How do I restore the normal behavior (searching on the specified search engine instead of the default search) ? Update: I have seen that clearing browsing data while I did the search fixes the problem. But I am not sure if it wont reapear.

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• jQuery hide/show div using variables

  - by user295927

  I am a nOOb to jQuery. I want to use variables in jQuery to hide/show divs. what I have so far is: $(document).ready(function(){ $('#listMenu a').click(function () { var getPage = $(this).attr("id"); var getName = $(this).attr("name"); //console.log(getPage); //console.log(getName); $("#" & getName ).show(); }); }); firebug console shows that I have the vars correctly, but I get this error next: this[H].style is undefined [Break on this error] (function(){var R=/((?:((?:([^()]+)...typeof K==="string"?K:K+"px")}})})(); any help is appreciated. sjs

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• Is It Safe to Cast Away volatile?

  - by Yan Cheng CHEOK

  Most of the time, I am doing this way. class a { public: ~ a() { i = 100; // OK delete (int *)j; // Compiler happy. But, is it safe? // Error : delete j; } private: volatile int i; volatile int *j; }; int main() { a aa; } However, I saw an article here: https://www.securecoding.cert.org/confluence/display/seccode/EXP32-C.+Do+not+access+a+volatile+object+through+a+non-volatile+reference Casting away volatile allows access to an object through a non-volatile reference. This can result in undefined and perhaps unintended program behavior. So, what will be the workaround for my above code example?

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• problem with extern variable

  - by sksingh73

  I have got 2 cpp files & a header file, which I have included in both cpp files. It's like this: abc.h extern uint32_t key; a.cpp #include "abc.h" uint32_t key; int main { ............. } b.cpp #include "abc.h" int main { printf("Key: %.8x\n", key); ............. } Now when I compile a.cpp, there is no error. but when i compile b.cpp it gives error "undefined reference to `key'". Please help me in finding the problem in this code.

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• Hyper-v dynamic memory client machines always use maximum memory

  - by Eric P

  When I create a virtual machine in Hyper-V and set it up to use dynamic memory, the virtual machine will always use the maximum memory within the virtualized OS. Hyper-V will show the assigned memory at 514mb, but when I log into the server and pull up task manager, it will show 90% memory used. When I bump the maximum memory up to 4gb, I get the same result: 90% memory usage. Nothing is even running on the virtual machine other than a clean instal of Windows Server 2008 R2. I have also tried it with Windows 7 with the same results. Is this the expected behavior or is something setup wrong

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• Keep a javascript variable after an ajax call

  - by Guillaume le Floch

  I'm new in javascript and jQuery. I'm using ajax calls to get data from my server. The fact is, I'm losing my javascript variables after the call .. Here is what I did : the variable is define outside any function and treat in an other function. var a = 0; function myfunction(url){ $.ajax({ url: url, timeout: 20000, success: function(data){ // Do some stuff // The a variable is now undefined }, error: function(){ // Do some stuff } }); } Everything is working fine, the only thing is that I need to keep my variables ... but it looks like it's gone .. Does anyone know why? Thanks

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