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  • Return more then One field from database SQLAlchemy

    - by David Neudorfer
    This line: used_emails = [row.email for row in db.execute(select([halo4.c.email], halo4.c.email!=''))] Returns: ['[email protected]', '[email protected]', '[email protected]', '[email protected]', '[email protected]'] I use this to find a match: if recipient in used_emails: If it finds a match I need to pull another field (halo4.c.code) from the database in the same row. Any suggestions on how to do this?

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  • When is BIG, big enough for a database?

    - by David ???
    I'm developing a Java application that has performance at its core. I have a list of some 40,000 "final" objects, i.e., I have an initialization input data of 40,000 vectors. This data is unchanged throughout the program's run. I am always preforming lookups against a single ID property to retrieve the proper vectors. Currently I am using a HashMap over a sub-sample of a 1,000 vectors, but I'm not sure it will scale to production. When is BIG, actually big enough for a use of DB? One more thing, an SQLite DB is a viable option as no concurrency is involved, so I guess the "threshold" for db use, is perhaps lower.

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  • Mercurial: include revisions in diff?

    - by David Wolever
    Is there some way to ask Mercurial to show the revisions being diffed in the output? For example: $ hg diff -r trunk:development diff -r 08d51ecf22cf:ff5673e55b9f --git a/foo.c b/foo.c ... Or something similar? I've found that there have been a few times that I've taken a diff (eg, to review), but have later been unable to recreate it because I've forgotten which revisions it was taken against.

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  • php mp3 headers in google chrome

    - by David
    I have this in a php to show a mp3 file, it code works fine on firefox and explorer but in chrome it not work. The chrome player appears but no sound and not increases time $ext = strtolower(substr(strrchr($filename,"."),1)); $ctype="audio/mpeg"; header( 'Expires: Sat, 26 Jul 1997 05:00:00 GMT' ); header( 'Last-Modified: ' . gmdate( 'D, d M Y H:i:s' ) . ' GMT' ); header( 'Cache-Control: no-store, no-cache, must-revalidate' ); header( 'Cache-Control: post-check=0, pre-check=0', false ); header( 'Pragma: no-cache' ); header("Content-Type: $ctype"); header("Content-Length: ".$len);

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  • spell checker: ignore CamelCaseWords

    - by David Oneill
    Is there a way to get the spell checker to properly check camel cased words? "ThisIsSpelledRightly" would be marked as spelled correctly, but "ThisIsNottSpeledRihgt" would be flagged? I use Xubuntu and firefox. I tried asking this over on superuser, but it got ignored.

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  • jQuery Mobile button js control

    - by David
    I have a button that is not triggering event in jQuery mobile. It was working but I had to remove the css. It was screwing up my all my ul lists. Any help would greatly appreciated Here is the code for the button at the bottom of the form : <div class="next"> <a class="btnNext">Next &gt;&gt;</a> </div> Which is supposed to do this on a separate js file: init: function(){ $('.btnNext').onclick(function(){ if ($('input[type=radio]:checked:visible').length == 0) { return false; } $(this).parents('.questionContainer').fadeOut(500, function(){ Here is the css I removed: a { border: 1px solid #000; padding: 2px 5px; font-weight: bold; font-size: 10px; background: #FFF; cursor: pointer; } a:hover { background: none; }

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  • Why is `goog.Disposable.call(this);` necessary?

    - by David Faux
    In this snippet of Google Closure javascript code involving a constructor, why is goog.Disposable.call(this); necessary? Doesn't Foo already inherit from Disposable with goog.inherits(foo, goog.Disposable);? goog.provide('foo'); /** * @constructor */ foo = function(){ goog.Disposable.call(this); } goog.inherits(foo, goog.Disposable); foo.prototype.doSomething = function(){ ... } foo.prototype.disposeInternal = function(){ ... }

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  • Tips / Resources for building a Google Chrome plugin

    - by David
    After test driving Google Chrome for 30 minutes or so, I like it, even if it seems bare-bones at the moment. The obvious way to add a few things I can't live without would be through plugins. Does anyone have any links to resources on how to get started building a plugin/addon for Chrome? Thanks.

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  • has_many :through default values

    - by David Lyod
    I have a need to design a system to track users memberships to groups with varying roles (currently three). class Group < ActiveRecord::Base has_many :memberships has_many :users, :through => :memberships end class Role < ActiveRecord::Base has_many :memberships has_many :users, :through => :memberships end class Membership < ActiveRecord::Base belongs_to :user belongs_to :role belongs_to :group end class User < ActiveRecord::Base has_many :memberships has_many :groups, :through => :memberships end Ideally what I want is to simply set @group.users << @user and have the membership have the correct role. I can use :conditions to select data that has been manually inserted as such : :conditions => ["memberships.grouprole_id= ? ", Grouprole.find_by_name('user')] But when creating the membership to the group the grouprole_id is not being set. Is there a way to do this as at present I have a somewhat repetitive piece of code for each user role in my Group model.

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  • Magento: server requirements for a quite big shop to run smoothly

    - by david parloir
    Hi, I'm working on a quite big magento: it will have 50 different shops (1 magento install, 1 admin to rule them all) for start, this number is expected to raise in the future, and a catalog of more than 1k products. This catalog will be shared by all shops. I'm concerned about the server requirements I need for this to run smoothly. So far this is what I've found to get the most of it: Caching: using magento's cache with APC, MySQL's querys Images sprite in the theme use FastCGI instead of mod_php database clustering: I don't think it will be necesary for 1k products, what do you think? using Zend Server Are there other thing I can do in order to improve magento's performance? I'd like to know all I need from the beginning so I can find the right server. thanks in advance.

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  • Release variable and assigning it again

    - by David Gonrab
    What is the preferred and/or correct way to release an NSMutableString (or any other class for that matter) instance and assign a new instance to the same variable in Objective-C on the iPhone? Currently I'm using [current release]; current = [NSMutableString new]; but I understand that the following works, too. NSMutableString *new = [NSMutableString new]; [current release]; current = [new retain]; [new release]; The variable current is declared in the interface definition of my class and gets released in dealloc.

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  • Whats the difference between a C++ and a Cocoa Project in Xcode?

    - by david
    I need to work with TagLib for my project. I've created a framework (and I tried using it as a lib) but the compiler cannot find #include < strings on compiling (No such file or Directory). I've created a test C++ project and it #includes < strings just fine. I've looked at the project settings and I cannot find a difference between them. But the standard cocoa projects obviously so not have the search path set to include C++ libraries (Or am I completely getting it wrong?). I've searched for a solution but no one else seems to have run into this problem.

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  • How to avoid lost calls to an external JS file before loading it.

    - by David
    Hi, My issue is that multiple websites are going to include my JS file and when calling something like this: <script src="..."></script> hello.say("yay"); there going to be a race issue so sometimes it could make it sometimes not. i know that i can solve that easily by putting every function in a window.onload but that wouldn't be clean as i've seen other websites magically solve that like google analytics: .. Calling google analytics JS.. <script type="text/javascript"> try{ var pageTracker = _gat._getTracker("UA-xxxxxx-x"); <-- this an object ! pageTracker._trackPageview(); } catch(err) {} </script> How to do that?

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  • Waiting for a subset of threads in a Java ThreadPool

    - by David Semeria
    Let's say I have a thread pool containing X items, and a given task employs Y of these items (where Y is much smaller than X). I want to wait for all of the threads of a given task (Y items) to finish, not the entire thread pool. If the thread pool's execute() method returned a reference to the employed thread I could simply join() to each of these Y threads, but it doesn't. Does anyone know of an elegant way to accomplish this? Thanks.

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  • how to check if a data exist on a table using hibernate

    - by David
    im using hibernate with my jsp page and mySQL ,how can i do that select * from student wher userName = *** with HQL and how i chek if that username exist in 'Student' table ? in my sql i use that ResultSet resultat = statement.executeQuery(); if (resultat.next()) { ....} i try this Session hibernateSession = MyDB.HibernateUtil.currentSession(); hibernateSession.find("select xxx from Etudinat where p.Nom=xxxx"); thats give an exception so how can i do that ? i have a login form send me a username and password i want to chek if that username exist in the table Student to set the user on a session what is the safty way to do that

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  • C# recursive programming with lists

    - by David Torrey
    I am working on a program where each item can hold an array of items (i'm making a menu, which has a tree-like structure) currently i have the items as a list, instead of an array, but I don't feel like I'm using it to its full potential to simplify code. I chose a list over a standard array because the interface (.add, .remove, etc...) makes a lot of sense. I have code to search through the structure and return the path of the name (i.e. Item.subitem.subsubitem.subsubsubitem). Below is my code: public class Item { //public Item[] subitem; <-- Array of Items public List<Item> subitem; // <-- List of Items public Color itemColor = Color.FromArgb(50,50,200); public Rectangle itemSize = new Rectangle(0,0,64,64); public Bitmap itemBitmap = null; public string itemName; public string LocateItem(string searchName) { string tItemName = null; //if the item name matches the search parameter, send it up) if (itemName == searchName) { return itemName; } if (subitem != null) { //spiral down a level foreach (Item tSearchItem in subitem) { tItemName = tSearchItem.LocateItem(searchName); if (tItemName != null) break; //exit for if item was found } } //do name logic (use index numbers) //if LocateItem of the subitems returned nothing and the current item is not a match, return null (not found) if (tItemName == null && itemName != searchName) { return null; } //if it's not the item being searched for and the search item was found, change the string and return it up if (tItemName != null && itemName != searchName) { tItemName.Insert(0, itemName + "."); //insert the parent name on the left --> TopItem.SubItem.SubSubItem.SubSubSubItem return tItemName; } //default not found return null; } } My question is if there is an easier way to do this with lists? I've been going back and forth in my head as to whether I should use lists or just an array. The only reason I have a list is so that I don't have to make code to resize the array each time I add or remove an item.

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  • How to randomly assign a partner?

    - by David
    I asked a question some time ago about creating a random circular partner assignment using php and mysql. This is a related issue. I am working from the following code to try to give two users new, randomly selected partners: $q = "SELECT user_id FROM users WHERE partner='$quit_partner' AND status='1'"; $r = mysqli_query ($dbc, $q) or trigger_error("Query: $q\n<br />MySQL Error: " . mysqli_error($dbc)); while ($row = mysqli_fetch_array($r)) { $users[] = $row[0]; } $current = end($users); $partners = array(); foreach ($users as $user) { $partners[$user] = $current; $current = $user; $q = "UPDATE users SET partner='{$partners[$user]}' WHERE user_id='{$user}'"; mysqli_query ($dbc, $q) or trigger_error("Query: $q\n<br />MySQL Error: " . mysqli_error($dbc)); } Basically, a particular user (lets say user #4) quits the activity, leaving multiple other users without a partner (hypothetically, users # 5,6,7). I need to find out who those users are, hence the first query. Once I find them, I throw them into an array. Then comes the difficult part. I want those newly partnerless users (5,6,7) to be randomly assigned new partners from everyone in the table. The current code is flawed in that it only assigns the newly partnerless users eachother. Thanks for your help.

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  • How to change word recognition in vim spell?

    - by David
    I like that vim 7.0 supports spell checking via :set spell, and I like that it by default only checks comments and text strings in my C code. But I wanted to find a way to change the behavior so that vim will know that when I write words containing underscores, I don't want that word spell checked. The problem is that I often will refer to variable or function names in my comments, and so right now vim thinks that each piece of text that isn't a complete correct word is a spelling error. Eg. /* The variable proj_abc_ptr is used in function do_func_stuff' */ Most of the time, the pieces seperated by underscores are complete words, but other times they are abbreviations that I would prefer not to add to a word list. Is there any global way to tell vim to include _'s as part of the word when spell checking?

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  • What is the worst source control you have used? [closed]

    - by David Liddle
    There are many discussions about what people's favourite source control is (subversion, mercurial ...). But what source control systems have you used that you certainly wouldn't recommend? And more beneficial, how would you go about promoting change in the business to a new source control system? A few years ago I developed using a source control system called Synergy. There were two Synergy experts in the company that constantly had to help the developers do check-ins/outs and merges were especially difficult. What would be your steps of migrating to a better source control. Would you host everything internally or pay for services such as github?

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