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• How do I replace colours in a movieclip?

  - by Oli

  I am trying to take a movieclip of a character and change the colour of their clothes. The character is comprised of vectors. So far I have semi-sucessfully used this method: stop the movieclip take the bitmap data from the current frame use threshold to replace the colour store the resulting bitmap data in an array add an onenterframe function - clear the current frame and add the bitmap data from the processed data in the array So - this works pretty well. Each frame is only processed once at the beginning and then the write to the movieclip is very quick. However! As the replacement is being performed on a bitmap there is an amount of aliasing that takes place to remove jaggies/pixelation. This produces colours that are not matched using threshold. So the main colour is replaced correctly but it is surrounded by a halo of mixed colours :( I am sure there should be a better way to do this. Any ideas or answers would be greatly apreciated - Thanks.

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• Ruby Socket Inheritance

  - by Jarsen

  I'm writing a Ruby class that extends TCPSocket. Assume it looks something like this: class FooSocket < TCPSocket def hello puts 'hello' end end I have a TCPServer listening for incoming connections server = TCPServer.new 1234 socket = server.accept When my server finally accepts a connection, it will return a TCPSocket. However, I want a FooSocket so that I can call socket.hello. How can I change TCPSocket into a FooSocket? I could duck-punch the methods and attributes I want directly onto the TCPSocket class, but I'm using it elsewhere and so I don't want to do that. Probably the easiest solution is to write a class that encapsulates a TCPSocket, and just pass the socket returned by accept as a param. However, I'm interested to know how to do it through inheritance—I've been trying to bend my mind around it but can't figure it out. Thanks in advance.

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• linux thread synchronization

  - by johnnycrash

  I am new to linux and linux threads. I have spent some time googling to try to understand the differences between all the functions available for thread synchronization. I still have some questions. I have found all of these different types of synchronizations, each with a number of functions for locking, unlocking, testing the lock, etc. gcc atomic operations futexes mutexes spinlocks seqlocks rculocks conditions semaphores My current (but probably flawed) understanding is this: semaphores are process wide, involve the filesystem (virtually I assume), and are probably the slowest. Futexes might be the base locking mechanism used by mutexes, spinlocks, seqlocks, and rculocks. Futexes might be faster than the locking mechanisms that are based on them. Spinlocks dont block and thus avoid context swtiches. However they avoid the context switch at the expense of consuming all the cycles on a CPU until the lock is released (spinning). They should only should be used on multi processor systems for obvious reasons. Never sleep in a spinlock. The seq lock just tells you when you finished your work if a writer changed the data the work was based on. You have to go back and repeat the work in this case. Atomic operations are the fastest synch call, and probably are used in all the above locking mechanisms. You do not want to use atomic operations on all the fields in your shared data. You want to use a lock (mutex, futex, spin, seq, rcu) or a single atomic opertation on a lock flag when you are accessing multiple data fields. My questions go like this: Am I right so far with my assumptions? Does anyone know the cpu cycle cost of the various options? I am adding parallelism to the app so we can get better wall time response at the expense of running fewer app instances per box. Performances is the utmost consideration. I don't want to consume cpu with context switching, spinning, or lots of extra cpu cycles to read and write shared memory. I am absolutely concerned with number of cpu cycles consumed. Which (if any) of the locks prevent interruption of a thread by the scheduler or interrupt...or am I just an idiot and all synchonization mechanisms do this. What kinds of interruption are prevented? Can I block all threads or threads just on the locking thread's CPU? This question stems from my fear of interrupting a thread holding a lock for a very commonly used function. I expect that the scheduler might schedule any number of other workers who will likely run into this function and then block because it was locked. A lot of context switching would be wasted until the thread with the lock gets rescheduled and finishes. I can re-write this function to minimize lock time, but still it is so commonly called I would like to use a lock that prevents interruption...across all processors. I am writing user code...so I get software interrupts, not hardware ones...right? I should stay away from any functions (spin/seq locks) that have the word "irq" in them. Which locks are for writing kernel or driver code and which are meant for user mode? Does anyone think using an atomic operation to have multiple threads move through a linked list is nuts? I am thinking to atomicly change the current item pointer to the next item in the list. If the attempt works, then the thread can safely use the data the current item pointed to before it was moved. Other threads would now be moved along the list. futexes? Any reason to use them instead of mutexes? Is there a better way than using a condition to sleep a thread when there is no work? When using gcc atomic ops, specifically the test_and_set, can I get a performance increase by doing a non atomic test first and then using test_and_set to confirm? *I know this will be case specific, so here is the case. There is a large collection of work items, say thousands. Each work item has a flag that is initialized to 0. When a thread has exclusive access to the work item, the flag will be one. There will be lots of worker threads. Any time a thread is looking for work, they can non atomicly test for 1. If they read a 1, we know for certain that the work is unavailable. If they read a zero, they need to perform the atomic test_and_set to confirm. So if the atomic test_and_set is 500 cpu cycles because it is disabling pipelining, causes cpu's to communicate and L2 caches to flush/fill .... and a simple test is 1 cycle .... then as long as I had a better ratio of 500 to 1 when it came to stumbling upon already completed work items....this would be a win.* I hope to use mutexes or spinlocks to sparilngly protect sections of code that I want only one thread on the SYSTEM (not jsut the CPU) to access at a time. I hope to sparingly use gcc atomic ops to select work and minimize use of mutexes and spinlocks. For instance: a flag in a work item can be checked to see if a thread has worked it (0=no, 1=yes or in progress). A simple test_and_set tells the thread if it has work or needs to move on. I hope to use conditions to wake up threads when there is work. Thanks!

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• http script to php?

  - by Simon

  Does anyone know how to write this code in php? <html> <form action="https://start.exactonline.nl/docs/XMLDivisions.aspx" method="POST" enctype="application/x-www-form-urlencoded" > <input type="hidden" name="_UserName_" value="*****"> <input type="hidden" name="_Password_" value="****"> <input type ="submit" value="Login"> </form> <form action ="https://start.*****.nl//docs/XMLDownload.aspx?Topic=GLTransactions&output=1&PartnerKey={672c4524-807b-4595-9518-78d848b3e9c6}" method="post"> <input type="submit" value="xmlinput"> </form> </html> Thnx in advance!

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• Flickr API automated login using Python library flickrapi

  - by Dave Aaron Smith

  I have a web application that I want to sync with Flickr. I don't want the users to have to log into Flickr so I plan to use a single login. I believe I'll need to do something like this: import flickrapi flickr = flickrapi.FlickrAPI(myKey, mySecret) (token, frob) = flickr.get_token_part_one(perms='write', my_auth_callback) flickr.get_token_part_two((token, frob,)) flickr.what_have_you(... I don't know what my_auth_callback should look like though. I suspect it will have to post my login information to flickr. Could I do the get_token_part_one step just once manually perhaps and then re-use it in get_token_part_two?

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• WYSIWYG iframe editor and oninput event.

  - by teehoo

  I'm writing a simple WYSIWYG editor in an iframe, but having trouble registering the "oninput" event to detect when the user modifies the text field such as pasting in data etc. var txtArea = document.getElementById('txtArea'); txtArea.contentWindow.document.designMode="on"; txtArea.contentWindow.document.open(); txtArea.contentWindow.document.write("<head><style type='text/css'>body{font-size:13px;}</style></head><body>"+data.document+"</body>"); txtArea.contentWindow.document.close(); $([txtArea.contentWindow.document]).bind("click", updateCaretPosMouse); //fires $([txtArea.contentWindow.document]).bind("keyup", updateCaretPosKeyboard); //fires $([txtArea.contentWindow.document]).bind("input", textChanged); //doesn't fire If I create a plain old element, and add the "input" event to this, then it works. Do 'input" events not work with iframes WYSIWYG editors?

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• What's the best self-tracking software for Linux?

  - by trench

  I'm looking for a way to track myself and receive quality data upon which I can write future scripts/programs. For example, I use Google Reader a lot. I'd like to track the hrefs that garner my clicks. Further, I'd like to drop all of the words of each href into a database where they can be stacked in a hierarchical manner. At the end of the week I want to know that "Ubuntu" garnered 448 clicks and "Cheetos" garnered 2. :) That's just one example... I'd like this tracking and data-collecting to extend beyond my browser. I know writing something to do this myself wouldn't be too awfully difficult but if something already exists I'd happily use it. Thanks in advance. Primary OS: Ubuntu 10.04

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• Key logging in .NET

  - by Moshe

  Is it possible to write a key logger in Visual Basic.NET? Is this the right language to be using? So far, I've gotten a console app to read input and append to a file. 1)How can I make a .NET program "catch" all keyboard input? 2)How do I make a process not show up in Task Manager? This is not for a virus, but rather a parental control program for a specific clientele. No malicious intent here.

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• Text replace with Jquery

  - by James123

  I have to replace Text inside HTML. When I looked ViewSource of the page I found this html tag. Now I need to replace text "Respuesta" with "Responder". I am using SharePoint CEWP webpart for this. What is the code I need write to replace this text? <div><a id="ReplyLink3" href="" ONCLICK="javascript:GoToPage('');return false;" target="_self"><img id="replyButton" border="0" align="middle" alt="Respuesta" src="/_layouts/images/reply.gif">&nbsp;<NOBR><b>Respuesta</b></NOBR></a><

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• Reading numeric Excel data as text using xlrd in Python

  - by Brian

  Hi guys, I am trying to read in an Excel file using xlrd, and I am wondering if there is a way to ignore the cell formatting used in Excel file, and just import all data as text? Here is the code I am using for far: import xlrd xls_file = 'xltest.xls' xls_workbook = xlrd.open_workbook(xls_file) xls_sheet = xls_workbook.sheet_by_index(0) raw_data = [['']*xls_sheet.ncols for _ in range(xls_sheet.nrows)] raw_str = '' feild_delim = ',' text_delim = '"' for rnum in range(xls_sheet.nrows): for cnum in range(xls_sheet.ncols): raw_data[rnum][cnum] = str(xls_sheet.cell(rnum,cnum).value) for rnum in range(len(raw_data)): for cnum in range(len(raw_data[rnum])): if (cnum == len(raw_data[rnum]) - 1): feild_delim = '\n' else: feild_delim = ',' raw_str += text_delim + raw_data[rnum][cnum] + text_delim + feild_delim final_csv = open('FINAL.csv', 'w') final_csv.write(raw_str) final_csv.close() This code is functional, but there are certain fields, such as a zip code, that are imported as numbers, so they have the decimal zero suffix. For example, is there is a zip code of '79854' in the Excel file, it will be imported as '79854.0'. I have tried finding a solution in this xlrd spec, but was unsuccessful.

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• JSF RuntimeException: Cannot find FacesContext

  - by Sunny Mate

  When i write <h:outputText value="Login Name"/> tag in my jsp i am getting "Cannot find FacesContext" error , with out that tag my jsp working fine here is my JSP <%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %> <%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %> <body> Login Name <input type="text" value=""/><br> **<h:outputText value="Login Name"/>** Password<input type="password" value=""/><br> <input type="submit" value="Login"> </body> </html>

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• Do MyISAM holes get filled in automatically?

  - by NNN

  When you run a delete on a MyISAM table, it leaves a hole in the table until the table is optimized. This affects concurrent inserts. On the default setting, concurrent_inserts only work for tables without holes. However, in the documentation for MyISAM, under the concurrent_insert section it says: Enables concurrent inserts for all MyISAM tables, even those that have holes. For a table with a hole, new rows are inserted at the end of the table if it is in use by another thread. Otherwise, MySQL acquires a normal write lock and inserts the row into the hole. http://dev.mysql.com/doc/refman/5.0/en/server-system-variables.html#sysvar_concurrent_insert Does that mean MyISAM automatically fills in holes whenever a new row is insert into the table? Previously I thought the holes would not be fixed until you OPTIMIZE a table.

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• Populate javascript template at startup global.asax

  - by Andrew Florko

  Hello, everybody I use asp.net mvc & going to build javascript files at application startup depending on site configuration. I am going to have some javascript file templates that will be populated with appropriate constants and put into /scripts folder. Please, suggest me the best way to do that. I want to have something like: application_startup() { string populatedFile = Html.RenderPartial("/scripts/script.template.js"); write populatedFile into /scripts folder... } Thank you in advance !

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• Multithreading in Lua

  - by RCIX

  I was having a discussion with my friend the other day. I was saying how that, in pure Lua, you couldn't build a preemptive multitasking system. He claims you can, because of the following reason: Both C and Lua have no inbuilt threading libraries [OP's note: well, Lua technically does, but AFAIK it's not useful for our purposes]. Windows, which is written in mostly C(++) has pre-emptive multitasking, which they built from scratch. Therefore, you should be able to do the same in Lua. The big problem i see with that is that the main way preemptive multitasking works (to my knowledge) is that it generates regular interrupts which the manager uses to get control and determine what code it should be working on next. I also don't think Lua has any facility that can do that. My question is: is it possible to write a pure-Lua library that allows people to have pre-emptive multitasking?

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• Capture DDE Data that is being streamed in to a software

  - by user534391

  Hello, I have a trading software that gets data from the internet. I want to capture that tick data. There is one software that has been made by a local develop which is able to do that and it looks like it uses DDE (NDde.dll, NetSQL.dll). I want to write a custom application that does the same. Any pointers how I can check how the data is being streamed and how to capture that data. I don't think it is encrypted, since the other developer would not have been able to decrypt either. I just need to scan how the software is getting the data. Thank you.

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• Add Core Data Index to certain Attributes via migration

  - by steipete

  For performance reasons, i want to set the Indexed Attribute to some of my entities. I created a new core data model version to perform the changes. Core Data detects the changes and migrates my model to the new version, however, NO INDEXES ARE GENERATED. If I recreate the database from scratch, the indexes are there. I checked with SQLite Browser both on the iPhone and on the Simulator. The problem only occurs if a database in the prior format is already there. Is there a way to manually add the indexes? Write some sql for that? Or am I missing something? I did already some more critical migrations, no problems there. But those missing indexes are bugging me. Thanks for helping!

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• Is System.AddIn mostly about making it easier to use Remoting or does it make it harder to do so?

  - by MatthewMartin

  It takes at least 7 assemblies and restricting my AddIn's data model to data types that remoting can deal with before the appdomain isolation features begin to work. It is so complex! The System.AddIn teams blog implies to me they were trying to re-create a mental model of COM, a model I never understood very well in the first place and am not sold on the benefits. (If COM is so good why's it dead?-rhetorical question.) If I don't need to mirror or interop with legacy COM (like VSTO does using System.AddIn), is it possible to just create some classes that load load in a new AppDomain? I can write the discovery code my self, I've done it before and a naive implementation is pretty fast because I'm not like iterating over the assemblies in the GAC! So my specific question is, can I get the AppDomain isolation that AddIns provide with a few code Remoting snippets, and what would those be?

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• How to create a demo version of my software in visual studio during MSI

  - by sijith

  How to create a 30 days evaluation software. Is there any possiblility to do this with MSI creation. It would be great if MSI installer package provides such in built facility, by which, application expiries after fixed trial period. If we going for custome action to do this by writing code, how can i do this. How to Write installation time in some file in installed path or in registry or both. Please give some sample of how to capture time during installation.

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• bash script to delete old deployments

  - by benjwarner

  I have a directory where our deployments go. A deployment (which is itself a directory) is named in the format: <application-name>_<date> e.g. trader-gui_20091102 There are multiple applications deployed to this same parent directory, so the contents of the parent directory might look something like this: trader-gui_20091106 trader-gui_20091102 trader-gui_20091010 simulator_20091106 simulator_20091102 simulator_20090910 simulator_20090820 I want to write a bash script to clean out all deployments except for the most current of each application. (The most current denoted by the date in the name of the deployment). So running the bash script on the above parent directory would leave: trader-gui_20091106 simulator_20091106 Any help would be appreciated.

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• JavaScript - Remove everything after </html> tag

  - by šljaker

  Can anyone tell me how to write javascript code that removes everything after the html tag. I have the following file: <html> <head> <script> // my script </script> </head> <body> Some text </body> </html> <script> </script> Rendered output must not contain the last script (or any other) tag.

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• htaccess redirect from subdomain to root

  - by Erin

  I'm hosting several domains on one account, and I currently have a RewriteRule set to redirect the root url (www.root.com) to a subdirectory (/public_html/root/). However, I have few directories in the root (/public_html/xyz/) that I would like to access from the root url (www.root.com/xyz). Is this possible to write a redirect for this, or do I have to place these folder in the /public_html/root/ directory? This is what I have for the .htaccess RewriteEngine on RewriteCond %{HTTP_HOST} ^(www.)?root.com$ RewriteCond %{REQUEST_URI} !^/root/ RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{HTTP_HOST} ^(www.)?hamiltonmehta.com$ RewriteRule ^(/)?$ hamiltonmehta/index.php [L] Thanks in advance!

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• Apache Custom Log Format to track complete file downloads

  - by Shishant

  Hello, I am trying to write a reward system wherein users will be given reward points if they download complete files, So what should be my log format. After searching alot this is what I understand its my first time and havent done custom logs before. First of all which file should I edit for custom logs because this thing I cant find. I am using ubuntu server with default apache, php5 and mysql installation # I use this commands and they work fine nano /etc/apache2/apache2.conf /etc/init.d/apache2 restart I think this is what I need to do for my purpose LogLevel notice LogFormat "%f %u %x %o" rewards CustomLog /var/www/logs/rewards_log rewards This is as it is command or there is something missing? and is there any particular location where I need to add this? and one more thing %o is for filesize that was sent and is it possible to log only files from a particular directory? or for files with size more than 10mb. Thank You.

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• Validate a string in a table in SQL Server

  - by Ashish Gupta

  I need to check If a column value (string) in SQL server table starts with a small letter and can only contain '_', '-', numbers and alphabets. I know I can use a SQL server CLR function for that. However, I am trying to implement that validation using a scalar UDF and could make very little here...I can use 'NOT LIKE', but I am not sure how to make sure I validate the string irrespective of the order of characters or in other words write a pattern in SQL for this. Am I better off using a SQL CLR function? Any help will be appreciated.. Thanks in advance

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• SQL for selecting only the last item from a versioned table

  - by Jeremy

  I have a table with the following structure: CREATE TABLE items ( id serial not null, title character varying(255), version_id integer DEFAULT 1, parent_id integer, CONSTRAINT items_pkey PRIMARY KEY (id) ) So the table contains rows that looks as so: id: 1, title: "Version 1", version_id: 1, parent_id: 1 id: 2, title: "Version 2", version_id: 2, parent_id: 1 id: 3, title: "Completely different record", version_id: 1, parent_id: 3 This is the SQL code I've got for selecting out all of the records with the most recent version ids: select * from items inner join ( select parent_id, max(version_id) as version_id from items group by parent_id) as vi on items.version_id = vi.version_id and items.parent_id = vi.parent_id Is there a way to write that SQL statement so that it doesn't use a subselect?

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• Unable to incorporate Eclispe JDT codeAssist facilities outside a Plug-in

  - by shi kui

  Using Eclipse jdt facilities, you can traverse the AST of java code snippets as follows: ASTParser ASTparser = ASTParser.newParser(AST.JLS3); ASTparser.setSource("package x;class X{}".toCharArray()); ASTparser.createAST(null).accept(...); But when trying to perform code complete & code selection it seems that I have to do it in a plug-in application since I have to write codes like IFile file = ResourcesPlugin.getWorkspace().getRoot().getFile(new Path(somePath)); ICodeAssist i = JavaCore.createCompilationUnitFrom(f); i.codeComplete/codeSelect(...) Is there anyway that I can finally get a stand-alone java application which incorporates the jdt code complete/select facilities? thx a lot! shi kui

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