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• Having trouble with post-commit hook

  - by John Isaacks

  I am following this tutorial that is like the hello world for post-commit I am using unbuntu 10.04. I installed svnnotify and ran $ which svnnotify which output: /usr/bin/svnnotify so I changed the path in the turorial from /usr/local/bin/svnnotify to /usr/bin/svnnotify I also tried changing the line: #!/bin/sh to #!/bin/bash since bash is the login shell in ubuntu 10.04. I tried to run it the way the tutorial originally had it, with my changes, and combinations of the two. Everytime the commit is successful but I get Warning: post-commit hook failed (exit code 1) with no output. The original way had output not found I am very new to linux and shell scripting and have exhausted everything I can think of. What am I doing wrong?

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• How is location accuracy measured in Android?

  - by John Palmer

  Does anyone know the proper interpretation of the accuracy measurements returned by getAccuracy()? For instance, are they calculated as: Circular Error Probability (meaning, if i understand correctly, radius of a 50% confidence circle)? Radius of 95% confidence circle? something else? Many thanks for any advice you can give me.

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• Write a dll that is accessable from VS 2003 VC++ code

  - by John

  I need to be able to write a DLL in either C# or VC++ that is accessible from code that is written in Visual Studio 2003 VC++. It looks like the code is unmanaged (uses * for pointers) VC++ and this DLL needs to be able to drop right in and be accessed by the current code. The DLL is an RS232 driver that needs to be able to return an int for an error code and pass back, by reference, some measured values, to the calling program. Will I even be able to write this in C#? If not, I only have access to Visual Studio 2005 or 2008. Will I be able to write my code in either, and will that DLL be able to be called from the current code base? Or do I have to go looking on ebay for a copy of VS 2003?

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• dijit hovering MenuItem issue

  - by John

  I have a dijit.layout.TabContainer on my form. I resize the browser window in such a way that all tabs won't fit in a single screen. In this case dijit automatically adds a drop-down button at the right end of the TabContainer (I get this for free). If I click on the drop-down button then I get the full List of Tab Names. Hovering over the List of Tab Names (which is in fact a collection of menu items) it blanks out the menu item name which I'm currently over. e.g. Full List: Tab1 Tab2 Tab3 Hovering over Tab2 I get: Tab1 Tab3 I get the same issue with any other dijit.Menu, dijit.MenuItem AND I get the same issue on IE, Firefox, Chrome. I haven't tested on any other browser. Thanks.

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• Improve long mysql query

  - by John Adawan

  I have a php mysql query like this $query = "SELECT * FROM articles FORCE INDEX (articleindex) WHERE category='$thiscat' and did>'$thisdid' and mid!='$thismid' and status='1' and group='$thisgroup' and pid>'$thispid' LIMIT 10"; As optimization, I've indexed all the parameters in articleindex and I use force index to force mysql to use the index, supposedly for faster processing. But it seems that this query is still quite slow and it's causing a jam and maxing out the max mysql connection limit. Let's discuss how we can improve on such long query.

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• Improve long mysql query

  - by John Adawan

  I have a php mysql query like this $query = "SELECT * FROM articles FORCE INDEX (articleindex) WHERE category='$thiscat' and did>'$thisdid' and mid!='$thismid' and status='1' and group='$thisgroup' and pid>'$thispid' LIMIT 10"; As optimization, I've indexed all the parameters in articleindex and I use force index to force mysql to use the index, supposedly for faster processing. But it seems that this query is still quite slow and it's causing a jam and maxing out the max mysql connection limit. Let's discuss how we can improve on such long query.

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• in Python find number of same elements in 2 lists

  - by John

  Hi, In Python if I have 2 lists say: l1 = ['a', 'b', 'c', 'd'] l2 = ['c', 'd', 'e'] is there a way to find out how many elements they have the same. In the case about it would be 2 (c and d) I know I could just do a nested loop but is there not a built in function like in php with the array_intersect function Thanks

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• c++ global operator not playing well with template class

  - by John

  ok, i found some similar posts on stackoverflow, but I couldn't find any that pertained to my exact situation and I was confused with some of the answers given. Ok, so here is my problem: I have a template matrix class as follows: template <typename T, size_t ROWS, size_t COLS> class Matrix { public: template<typename, size_t, size_t> friend class Matrix; Matrix( T init = T() ) : _matrix(ROWS, vector<T>(COLS, init)) { /*for( int i = 0; i < ROWS; i++ ) { _matrix[i] = new vector<T>( COLS, init ); }*/ } Matrix<T, ROWS, COLS> & operator+=( const T & value ) { for( vector<T>::size_type i = 0; i < this->_matrix.size(); i++ ) { for( vector<T>::size_type j = 0; j < this->_matrix[i].size(); j++ ) { this->_matrix[i][j] += value; } } return *this; } private: vector< vector<T> > _matrix; }; and I have the following global function template: template<typename T, size_t ROWS, size_t COLS> Matrix<T, ROWS, COLS> operator+( const Matrix<T, ROWS, COLS> & lhs, const Matrix<T, ROWS, COLS> & rhs ) { Matrix<T, ROWS, COLS> returnValue = lhs; return returnValue += lhs; } To me, this seems to be right. However, when I try to compile the code, I get the following error (thrown from the operator+ function): binary '+=' : no operator found which takes a right-hand operand of type 'const matrix::Matrix<T,ROWS,COLS>' (or there is no acceptable conversion) I can't figure out what to make of this. Any help if greatly appreciated!

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• Objects of the same name in base and derived class not getting flagged as an error

  - by John Smith

  class Base { public: type1 m_Pants; }; class Derived : Base { public: type2 m_Pants }; This essentially didn't get flagged as an error, but was creating all kinds of clobbering and issues throughout a project. Does anyone know of a technicality that wouldn't flag this?

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• visual studio qt5 plugins not working on release

  - by John Smith

  I'm got this project where i'm showing images with a qt5 interface, i'm simply setting the Pixmap of a label with the qimage pixmap The thing is, it's working on a debug build, but not on a release build and i dont understand why. I already got a folder in my .Exe folder named "plugins" and a subfolder in it named "imageformats", and in this folder the file named "qjpeg.dll" So i coming here to see if someone has an idea on why it doesn't work ? Thanks in advance !

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• Convolving two signals

  - by John Elway

  Calculate the convolution of the following signals (your answer will be in the form of an equation): h[n] = delta[n-1] + delta[n+1], x[n] = delta[n-a] + delta[n+b] I'm lost as to what I do with h and x. Do I simply multiply them? h[n]*x[n]? I programmed convolution with several types of blurs and edge detectors, but I don't see how to translate that knowledge to this problem. please help!

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• Function name inside a variable

  - by John Doe

  Hello. I have a simple question (i guess). I'm getting the name of the function inside a variable from database. After that, i want to run the specific function. How can i echo the function's name inside the php file? The code is something like this: $variable= get_specific_option; //execute function $variable_somesuffix(); The "somesuffix" will be a simple text. I tried all the things i had in mind but nothing worked.

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• MVC binding form data problem.

  - by John

  I am using an object that matches all the fields in my form. I then use the default binding to populate the object in my action, like this; public ActionResult GetDivisionData(DivisionObj FormData) My DivisionObj initializes all it's values to string.empty in the constructor. The problem is that when the binder populates the model from the posted form data, any data that is not posted is set to null in the object, eventhough I initialized the object to contain empty strings. Is there a way to change this so that unposted data will be an empty string.

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• Replace ",**" with a linebreak using RegEx (or something else)

  - by John

  I'm getting started with RegEx and I was wondering if anyone could help me craft a statement to convert coordinates as follows: 145.00694,-37.80421,9 145.00686,-37.80382,9 145.00595,-37.8035,16 145.00586,-37.80301,16 to 145.00694,-37.80421 145.00686,-37.80382 145.00595,-37.8035 145.00586,-37.80301 (Strip off the last comma and value and turn it into a line break.) I can't figure out how to use wildcards to do something like that. Any help would be greatly appreciated! Thanks.

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• If I use a menu.xml to create an Options menu, can I change the standard menu attributes like text s

  - by John

  If I use a menu.xml to create an Options menu, can I change the standard menu button attributes like text size, etc inside of that menu.xml? I would like to make the text in each button larger, bold and different colors. Thank you for reading my question

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• Prawn image position

  - by John

  I'm trying to layout 6 images per page with prawn in Ruby: case (idx % 6) # ugly when 0 : (pdf.start_new_page; pdf.image img, :position => :left, :vposition => :top, :width => 270) when 1 : pdf.image img, :position => :right, :vposition => :top, :width => 270 when 2 : pdf.image img, :position => :left, :vposition => :center, :width => 270 when 3 : pdf.image img, :position => :right, :vposition => :center, :width => 270 when 4 : pdf.image img, :position => :left, :vposition => :bottom, :width => 270 when 5 : pdf.image img, :position => :right, :vposition => :bottom, :width => 270 end Not sure what I'm doing wrong, but it prints the first 3 images to the PDF, then creates a new page and prints the last three: Page 1: <img> <img> <blank> <blank> <blank> <blank> Page 2: <blank> <blank> <blank> <img> <img> <img> Any suggestions would help.

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• Using stringstream instead of `sscanf` to parse a fixed-format string

  - by John Dibling

  I would like to use the facilities provided by stringstream to extract values from a fixed-format string as a type-safe alternative to sscanf. How can I do this? Consider the following specific use case. I have a std::string in the following fixed format: YYYYMMDDHHMMSSmmm Where: YYYY = 4 digits representing the year MM = 2 digits representing the month ('0' padded to 2 characters) DD = 2 digits representing the day ('0' padded to 2 characters) HH = 2 digits representing the hour ('0' padded to 2 characters) MM = 2 digits representing the minute ('0' padded to 2 characters) SS = 2 digits representing the second ('0' padded to 2 characters) mmm = 3 digits representing the milliseconds ('0' padded to 3 characters) Previously I was doing something along these lines: string s = "20101220110651184"; unsigned year = 0, month = 0, day = 0, hour = 0, minute = 0, second = 0, milli = 0; sscanf(s.c_str(), "%4u%2u%2u%2u%2u%2u%3u", &year, &month, &day, &hour, &minute, &second, &milli ); The width values are magic numbers, and that's ok. I'd like to use streams to extract these values and convert them to unsigneds in the interest of type safety. But when I try this: stringstream ss; ss << "20101220110651184"; ss >> setw(4) >> year; year retains the value 0. It should be 2010. How do I do what I'm trying to do? I can't use Boost or any other 3rd party library, nor can I use C++0x.

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• django-admin.py startproject mysite not working well on windows 7

  - by john

  Hi I'm learning django and I did successfully start a site on Window XP by following the tutorial. However, on Window 7 when I issued: django-admin.py startproject mysite python.exe was started and a window appeared to ask me to choose either python.exe or other program to open a file.... did I do anthing wrong or there are more tricks for window 7? thanks.

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• Put indexes on a table with lots of BOOL/TINYINT?

  - by John Tyler

  An old mentor once told me to place indexes on most things you use a WHERE clause for. Should I put an index on BOOL/TINYINT's? There is a significant amount of them in the table I am working with, and often results are filtered by anywhere from 1-20 of these boolean conditions.

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• Code Igniter controller - can't use uri->segment with function index()?

  - by John

  I'm working with code igniter and for some reason, the url http://mysite.com/account/100 gives me a 404 error. Here's what my controller looks like. class account extends Controller { function account() { parent::Controller(); } function index() { echo $this->uri->segment(2); } Any idea what's wrong?

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• Library to parse C/C++ source code

  - by John

  Which library should I use to parse C/C++ source code file? I need to parse source file, calculate how much useful strings inside, how much 'for' blocks, 'if' blocks, how much comments inside. I also may need to insert a comment or small piece of code after each 'for' block. Is there any libraries? May be any library included in Microsoft Visual Studio?

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• Rewriting .each() loop as for loop to optimize, how to replicate $(this).attr()

  - by John B

  I running into some performance issues with a jquery script i wrote when running in ie so I'm going through it trying to optimize any way possible. Apparently using for loops is way faster than using the jQuery .each method. This has led me to a question regarding the equivalent of $(this) inside a for loop. I'm simplifying what I'm doing in my loop down to just using an attr() function as it gets across my main underlying question. Im doing this with each(simplified) var existing = $('#existing'); existing.each(function(){ console.log($(this).attr('id')); }); And I've tried rewriting it as a for loop as such: var existing = $('#existing'); for(var i = 0;i < existing.length;i++) { console.log(existing[i].attr('id')); } Its throwing an error saying: Uncaught TypeError: Object #<HTMLDivElement> has no method 'attr' Thanks.

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• What does a JSON-encoded request look like?

  - by john

  I'm building an API using PHP. What do I need to do to recognize a JSON encoded request? Does it come with a certain request type? How do I get just the request body so that I can json_decode it?

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• Changing A Different Class Display on Hover with Jquery

  - by John K

  Ok, here's what I'm trying to do. I have a DIV box with a child element set with DISPLAY: NONE;. I'm trying to use Jquery so that when the mouse enters the parent DIV box, the child element is made visible, and then hides when the mouse leaves the parent DV. There will be multiple divs on the page with these classes. For some reason it's not working. Any ideas? Here's my code: HTML: <div class="parent"> <span class="handle" style="display: none;">My Handle</span> <p>Child Text</p> </div> Javascript: $(document).ready(function () { $('.parent').mouseenter(function(){ $(this).next('.handle').show(); }); $('.parent').mouseleave(function(){ $(this).next('.handle').hide(); }); })

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• How can I use the compile time constant __LINE__ in a string?

  - by John

  I can use __LINE__ as a method parameter just fine, but I would like an easy way to use it in a function that uses strings. For instance say I have this: 11 string myTest() 12 { 13 if(!testCondition) 14 return logError("testcondition failed"); 15 } And I want the result of the function to be: "myTest line 14: testcondition failed" How can I write logError? Does it have to be some monstrosity of a macro?

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