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  • Efficient way to delete a line from a text file (C#)

    - by Valentin Vasilyev
    Hello. I need to delete a certain line from a text file. What is the most efficient way of doing this? File can be potentially large(over million records). Thank you. UPDATE: below is the code I'm currently using, but I'm not sure if it is good. internal void DeleteMarkedEntries() { string tempPath=Path.GetTempFileName(); using (var reader = new StreamReader(logPath)) { using (var writer = new StreamWriter(File.OpenWrite(tempPath))) { int counter = 0; while (!reader.EndOfStream) { if (!_deletedLines.Contains(counter)) { writer.WriteLine(reader.ReadLine()); } ++counter; } } } if (File.Exists(tempPath)) { File.Delete(logPath); File.Move(tempPath, logPath); } }

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  • Install driver by using C++

    - by user296359
    Hi, This is a question about installing driver. I have the following files : aaa.cat aaa.inf x86\ttt.sys I can install this driver by clicking "update driver" in device manager. But now I need to install this driver on Windows (XP, Vista and Win7) by using C++. How could I do this? On the other hand, I can't use install shield or other tool to do the job. That is why I am asking this question. Thanks in advance. I have found this page, which mentioned SetupInstallFile and SetupInstallFileEx functions. Is this the answer? http://msdn.microsoft.com/en-us/library/aa376958%28VS.85%29.aspx

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  • In MVC framworks (such as Ruby on Rails), does usually Model spell as singular and controller and vi

    - by Jian Lin
    I usually see Ruby on Rails books using script/generate model Story name:string link:string which is a singular Story, while when it is controller script/generate controller Stories index then the Story now is Stories, which is plural. Is this a standard on Ruby on Rails? Is it true in other MVC frameworks too, like CakePHP, Symfony, Django, or TurboGears? I see that in the book Rails Space, the controller is also called User, which is the same as the model name, and it is the only exception I see. Update: also, when scaffold is done on Ruby on Rails, then automatically, the model is singular and the controller and view are both plural.

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  • SHA1CryptoServiceProvider changed in .NET 4

    - by WebDude
    I am currently trying to upgrade a project of mine from .NET 3.5 to .NET 4.0 Everything was going really well, all code compiled, all tests passed. Then I hit a problem deploying to my stagomg environment. Suddenly my logins were no longer working. It seems my SHA1 hashed passwords are being hashed differently in .NET 4. I am using the SHA1CryptoServiceProvider: SHA1CryptoServiceProvidercryptoTransformSHA1 = new SHA1CryptoServiceProvider(); To test I created a new Visual Studio project with 2 console applications. The first targeted at .NET Framework 3.5 and the second at 4.0. I ran exactly the same hashing code in both and different results were produced. Why is this happening and how can I fix this? I obviously cannot go update all of my users passwords considering I do not know what they are. Any help would be greatly appreciated.

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  • What is the Software Development Lifecycle?

    - by j-t-s
    Our investor wants a SDLC. I've never written one before, and I don't have enough time to go and buy a book, or spend much time learning about them. From what I've been told about them, they consist of requirements (what needs to be done), and a list is done. Is this correct? Update: I have found this article which really helps to explain things in simple terms and very quickly. Not that I think an SDLC should be done quickly. In my case, I have no other option.

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  • Suggestions on how to track tag count for a particular object

    - by Robin Fisher
    Hi, I'm looking for suggestions on how to track the number of tags associated with a particular object in Rails. I'm using acts_as_taggable_on and it's working fine. What I would like to be able to do is search for all objects that have no tags, preferably through a scope i.e. Object.untagged.all My first thought was to use an after_save callback to update an attribute called "taggings_count" in my model: def update_taggings_count self.taggings_count = self.tag_list.size self.save end Unfortunately, this does the obvious thing of putting me in an infinite loop. I need to use an after_save callback because the tag_list is not updated until the main object is saved. Would appreciate any suggestions as I'm on the verge of rolling my own tagging system. Regards Robin

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  • Django equivalent to paster for backend processes

    - by intractelicious
    I use pylons in my job, but I'm new to django. I'm making an rss filtering application, and so I'd like to have two backend processes that run on a schedule: one to crawl rss feeds for each user, and another to determine relevance of individual posts relative to users' past preferences. In pylons, I'd just write paster commands to update the db with that data. Is there an equivalent in django? EG is there a way to run the equivalent of python manage.py shell in a non-interactive mode?

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  • numberOfSectionsInTableView is requested in/after viewDidLoad ONLY if tableview is empty

    - by Ben Packard
    A simple tableviewController, empty. A modal that can be launched from a button. No data in the data source for the tableview, and no rows displayed. I open the modal, use it to add an item, and return to the tableview controller. The tableview updates itself automatically, and the new row is displayed. I add a second item. The table view does NOT update automatically. I can tell by logging inside numberOfSectionsInTableView that even if I go to add the first item and cancel, the tableview refreshes - it asks for the number of sections, rows, and the cell to display (if there is one). But not if there is one pre-existing row in the table. I've scoured my code but can't find anything that would cause the tableview to know when the first item is added, but none afterwards. Any ideas? EDIT - I have further narrowed my issue so will close this shortly and post a more specific question

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  • Syncing a table records with a Service response frequently

    - by Karthik Dheeraj
    I am requesting data from a service whose response in stored in a database.First, I have an empty table, whenever I make my very first request the records from the service comes to my database table. from now, whenever I make second request, the service will provide me some records which may be same as my first response, may be new records, may be updated records etc. my query is to how to update my table with respect to the responses coming from the service during my second request on-wards? so that Unchanged records will remain same, New records will be added, updated records will be updated.Do I need to write any stored procedure on my DB or any workaround ?what might be the scenario if I use Nomysql DB's like mongo DB ? Thanks In Advance.

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  • The item you tried to buy is no longer available [Environment: Sandbox]

    - by Ansari
    I am trying to put In App purchase in my application. I had setup a consumable product which was working fine in Sandbox environment. Now i just made a new product which is non-consumable with new price tier, and deleted the old one. Update my code, with the new Product ID. When request is sent, it properly shows the right Product with newly added price tier, But when you tap on Buy button it gives you the error "The item you tried to buy is no longer available [Environment: Sandbox]". Any idea ?

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  • Suggestions for a very easy to edit CMS?

    - by jdshipengrover
    I need advice/suggestions. At my place of work - we have a large data set. We would like to server the data up as editable html pages. (Its mostly lists of simple text) We would like to add data, change it's order, update text etc...from the editable pages. It has to have a pretty low bar for usability and WYSIWYG is a must. The folks who will edit are not programmers by a long shot. We are not sure Wiki will work. It might have to do - but not sure. Changes have to be tracked and written back into the DB I am thinking some kind of open source CMS might work? Wordpress, Joomla, Drupal - something that can get us up and running pretty quickly. I really am open to suggestions - not sure where to begin on this one. Thanks all

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  • Help Writing Input Data to Database With Wordpress Plugin

    - by HollerTrain
    Hi I am making a wordpress plugin where I need the Admin to enter data into a database table. I am able to install the db table when the Plugin is activated, however I can't figure out how to save the user input. I've asked on the WP forums but they're dead... Any experienced guru who can lend some guidance would be greatly appreciated. <?php /******************************************************************* * INSTALL DB TABLE - ONLY AT RUN TIME * *******************************************************************/ function ed_xml_install() { global $wpdb; $ed_xml_data = $wpdb->prefix . "ed_xml_data"; if($wpdb->get_var("SHOW TABLES LIKE '$ed_xml_data'") != $ed_xml_data) { $sql = "CREATE TABLE " . ed_xml_data . " ( id mediumint(9) NOT NULL AUTO_INCREMENT, name tinytext NOT NULL, address text NOT NULL, url VARCHAR(55) NOT NULL, phone bigint(11) DEFAULT '0' NOT NULL, UNIQUE KEY id (id) );"; require_once(ABSPATH . 'wp-admin/includes/upgrade.php'); dbDelta($sql); $name = "Example Business Name"; $address = "1234 Example Street"; $url = "http://www.google.com"; $phone = "523-3232-323232"; $insert = "INSERT INTO " . ed_xml_data . " (phone, name, address, url) " . "VALUES ('" . phone() . "','" . $wpdb->escape($name) . "','" . $wpdb->escape($address) . "', '" . $wpdb->escape($url) . "')"; $results = $wpdb->query( $insert ); } } //call the install hook register_activation_hook(__FILE__,'ed_xml_install'); /******************************************************************* * CREATE MENU, CREATE MENU CONTENT * *******************************************************************/ if ( is_admin() ){ /* place it under the ED menu */ //TODO $allowed_group = ''; /* Call the html code */ add_action('admin_menu', 'ed_xmlcreator_admin_menu'); function ed_xmlcreator_admin_menu() { add_options_page('ED XML Creator', 'ED XML Creator', 'administrator', 'ed_xml_creator', 'ed_xmlcreator_html_page'); } } /******************************************************************* * CONTENT OF MENU CONTENT * *******************************************************************/ function ed_xmlcreator_html_page() { <div> <h2>Editors Deal XML Options</h2> <p>Fill in the below information which will get passed to the .XML file.</p> <p>[<a href="" title="view XML file">view XML file</a>]</p> <form method="post" action="options.php"> <?php wp_nonce_field('update-options'); ?> <table width="510"> <!-- title --> <tr valign="top"> <th width="92" scope="row">Deal URL</th> <td width="406"> <input name="url" type="text" id="url" value="<?php echo get_option('url'); ?>" /> </td> </tr> <!-- description --> <tr valign="top"> <th width="92" scope="row">Deal Address</th> <td width="406"> <input name="address" type="text" id="address" value="<?php echo get_option('address'); ?>" /> </td> </tr> <!-- business name --> <tr valign="top"> <th width="92" scope="row">Business Phone</th> <td width="406"> <input name="phone" type="text" id="phone" value="<?php echo get_option('phone'); ?>" /> </td> </tr> <!-- address --> <tr valign="top"> <th width="92" scope="row">Business Name</th> <td width="406"> <input name="name" type="text" id="name" value="<?php echo get_option('name'); ?>" /> </td> </tr> </table> <input type="hidden" name="action" value="update" /> <input type="hidden" name="page_options" value="hello_world_data" /> <p> <input type="submit" value="<?php _e('Save Changes') ?>" /> </p> </form> </div> ?>

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  • Ajax: Load XML from different domain?

    - by John Isaacks
    I have signed up(paid) for Google site search. They have me a url of a sort of web service where I can send a query to it, it searches my site, and it returns XML of the search results. Well I am trying to load this XML via Ajax from a page on my site but I cannot. I can load from any of my pages on my domain so I am assuming it is because of the XML being on Google's domain. So there has got to be a way to load it though, I don't think they would have given me the URL if I couldn't do anything with it lol. Does anyone know how to do this? Thanks! UPDATE: this is what the page says on google that gave me the XML: How to get XML You can get XML results for your search engine by replacing query+terms with your search query in this URL: http://www.google.com/cse?cx=MY_UNIQUE_KEY&client=google-csbe&output=xml_no_dtd&q=query+terms Where MY_UNIQUE_KEY = my unique key.

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  • Google App Engine - Dealing with concurrency issues of storing an object

    - by Spines
    My User object that I want to create and store in the datastore has an email, and a username. How do I make sure when creating my User object that another User object doesn't also have either the same email or the same username? If I just do a query to see if any other users have already used the username or the email, then there could be a race condition. UPDATE: The solution I'm currently considering is to use the MemCache to implement a locking mechanism. I would acquire 2 locks before trying to store the User object in the datastore. First a lock that locks based on email, then another that locks based on username. Since creating new User objects only happens at user registration time, and it's even rarer that two people try to use either the same username or the same email, I think it's okay to take the performance hit of locking. I'm thinking of using the MemCache locking code that is here: http://appengine-cookbook.appspot.com/recipe/mutex-using-memcache-api/ What do you guys think?

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  • Too Few Arguments

    - by NoahClark
    I am trying to get some Javascript working in my Rails app. I want to have my index page allow me to edit individual items on the index page, and then reload the index page upon edit. My index.html.erb page looks like: <div id="index"> <%= render 'index' %> </div> In my index.js.erb I have: $('#index').html("<%=j render 'index' %>"); and in my holders_controller: def edit holder = Holder.find(params[:id]) end def update @holder = Holder.find(params[:id]) if @holder.update_attributes(params[:holder]) format.html { redirect_to holders_path } #, flash[:success] = "holder updated") ## ^---Line 28 in error format.js else render 'edit' end end When I load the index page it is fine. As soon as click the edit button and it submits the form, I get the following: But if I go back and refresh the index page, the edits are saved. What am I doing wrong?

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  • which is better, creating a materialized view or a new table?

    - by Carson
    I have some demanding mysql queries that are needed to grap same up-to-date datasets from 5-7 mysql tables. I am thinking of creating a table or materialized view to gather all demanding columns from other tables, so as to increase performance. If I create that table, I may need to do extra insert / update / delete operation each time other tables updated. if I create materialized view, I am worrying if the performance can be greatly improved. Because data from other tables are changing very frequently. Most likely, the view may need to be created first everytime before selecting it. Any ideas? e.g. how to cache? other extra measures I can do?

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  • access custom group

    - by Carlos
    I have my Access 2007 database configured to use "Custom" groups in the navigation pane. I've grouped all my tables in a way that makes sense. However, whenever I update a link table, it loses its grouping. I have not been able to find a way to avoid this. Since it seems to be unavoidable, I'd like to simply have a macro that adds the table back to the right group programatically. I have not found any examples on how to do this. Any suggestions?

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  • Is this an UITableView -beginUpdates documentation error?

    - by mystify
    I can't wrap my head around what they tried to say here in the docs for -beginUpdate: Call this method if you want subsequent insertions, deletion, and selection operations (for example, cellForRowAtIndexPath: and indexPathsForVisibleRows) to be animated simultaneously. Let's see... cellForRowAtIndexPath: and indexPathsForVisibleRows are both GETTER methods. They do not update anything and do not change anything. So why should I call -beginUpdates before calling these? And what's animated regarding these? Well, nothing, huh? Just want to make sure this is really an error in the docs and I didn't miss something.

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  • How do I use dependencies in a makefile without calling a target?

    - by rassie
    I'm using makefiles to convert an internal file format to an XML file which is sent to other colleagues. They would make changes to the XML file and send it back to us (Don't ask, this needs to be this way ;)). I'd like to use my makefile to update the internal files when this XML changes. So I have these rules: %.internal: $(DATAFILES) # Read changes from XML if any # Create internal representation here %.xml: %.internal # Convert to XML here Now the XML could change because of the workflow described above. But since no data files have changed, make would tell me that file.internal is up-to-date. I would like to avoid making %.internal target phony and a circular dependency on %.xml obviously doesn't work. Any other way I could force make to check for changes in the XML file and re-build %.internal?

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  • Installed Redmine on Ubuntu; But i have no clue how to use it to create Users/Projects/Roles/Tracking etc.....

    - by Ronnie
    Hi all, Im new to Redmine. I installed redmine(with mysql) on Ubuntu 10.04. The following were the installation steps i did: $ sudo apt-get install redmine redmine-mysql subversion $ ln -s /usr/share/redmine/public /var/www/redmine In /etc/apache2/mods-available/passenger.conf, added a PassengerDefaultUser www-data directive. Configured the /var/www/redmine location in /etc/apache2/sites-available/default: RailsBaseURI /redmine PassengerResolveSymlinksInDocumentRoot on $ sudo a2enmod passenger I then restarted the apache2 server. Thats it. Now i typed http://localhost/redmine/ in my browser and accessed my redmine instance. So from here on, how do i create different users with with different privileges, create different projects, also update the issues and other project management related stuff..... I know this sounds silly, but i couldnt find anythin to proceed....

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  • php database session handling problem in IE8!

    - by psyb0rg
    I've got an html page from where Im making this call periodically: function logon(id) { $.get("data.php", { action: 'online', userID: id}, function(data){ $("#msg").html(data); }); } What this does is it calls this SQL script in data.php: $sql = "update user_sessions set expires=(expires + 2) where userID = $userID"; mysql_query($sql, $conn) or die(mysql_error()); echo $sql; I can see by the echo that the sql syntax and values are correct, but THE CHANGES TO THE expires FIELD ARE NOT DONE, ONLY IN IE8!! It works fine in other ff, safari, chrome, ie6 and 7. There is nothing browser specific about making this sql call, but the user_sessions table is used to store PHP's sessions. Im only increasing the session expiry time when the call is made. What in IE8's session handling is preventing the session time from changing? Is there any caching or cookie problem that needs to be changed?

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  • How to have tortoisesvn Always freeze svn:externals for tags

    - by dnndeveloper
    Is this possible with tortoiseSVN?: Always freeze svn:externals for tags the scenario is our trunk will always use the 'head' revision for externals, however when we create 'tags' we would like for them to have a revision set for externals to properly 'freeze' them at a specific point in time. Thanks! Update Thanks to everyone for your feedback/info. Since I could not find anything that would completely meet our needs (tried smartsvn and svncopy.pl) I made a console app that so far has passed all our test cases. A high level overview: The app takes a repository URL then looks for all externals and adds the last commit revision for them - I do a "svn info" and get the "commit revision". The app works with both folder and single file externals. Here is the source code and complete setup files: http://svnxf.codeplex.com/

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  • MSSql Query solution cum Suggestion Required

    - by Nirmal
    Hello All... I have a following scenario in my MSSql 2005 database. zipcodes table has following fields and value (just a sample): zipcode latitude longitude ------- -------- --------- 65201 123.456 456.789 65203 126.546 444.444 and "place" table has following fields and value : id name zip latitude longitude -- ---- --- -------- --------- 1 abc 65201 NULL NULL 2 def 65202 NULL NULL 3 ghi 65203 NULL NULL 4 jkl 65204 NULL NULL Now, my requirement is like I want to compare my zip codes of "place" table and update the available latitude and longitude fields from "zipcode" table. And there are some of the zipcodes which has no entry in "zipcode" table, so that should remain null. And the major issue is like I have more then 50,00,000 records in my db. So, query should support this feature. I have tried some of the solutions but unfortunately not getting proper output. Any help would be appreciated...

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  • svn working copy spanning 2 physical drives?

    - by ronenosity
    I have a large repository hosted on dreamhost that I backup daily on a remote machine using a windows scheduled task which updates the working copy located on an external USB 300GB drive connected to the remote machine. The 300GB drive is nearly full with only 26GB of free space remaining. Recently I added a second USB external 1TB drive to increase storage capacity. I would like to ask: what is the best way to use the new 1TB drive? Is it possible to span the working copy across both drives (ex: somehow create a 1.3 TB drive)? If I copied the working copy from the 300GB to the 1TB would svn continue form do I need to retarget the update working copy script to the new 1TB drive and start downloading everything again (least desired option) thanks

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  • Does a TransactionScope that exists only to select data require a call to Complete()

    - by fordareh
    In order to select data from part of an application that isn't affected by dirty data, I create a TransactionScope that specifies a ReadUncommitted IsolationLevel as per the suggestion from Hanselman here. My question is, do I still need to execute the oTS.Complete() call at the end of the using block even if this transaction scope was not built for the purpose of bridging object dependencies across 2 databases during an Insert, Update, or Delete? Ex: List<string> oStrings = null; using (SomeDataContext oCtxt = new SomeDataContext (sConnStr)) using (TransactionScope oTS = new TransactionScope(TransactionScopeOption.Required, new TransactionOptions { IsolationLevel = System.Transactions.IsolationLevel.ReadUncommitted })) { oStrings = oCtxt.EStrings.ToList(); oTS.Complete(); }

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