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• How do I do a has_many through association on a has_many through association in rails?

  - by Angela

  Warning: I may have the wrong 'problem statement' but here it goes: A Campaign has many Contacts. A Campaign has many Emails. Therefore, a Contact has many Emails through a Campaign. And an Email can have many Contacts through a Campaign. Each Contact-Email pair has its own unique Status (status1, status2, etc). Each Status (for a Contact-Email pair) will have its own User. I do not know how to model Status, or User. Currently the immediate challenge is Status. (see diagram below)

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• Setting a property from one collection to another collection

  - by ooo

  I have two colluections List<Application> myApps; List<Application> yourApps; These lists have overlapping overlapping data but they are coming from different sources and each source has some missing field data. Application object has a property called Description Both collections have a unique field called Key i want to see if there is a LINQ solution to: Loop through all applications in myApps and look at the key and see if that existing in yourApps. If it does, i want to take the description property from that application in yourApps and set the description property on the application on myApps to that same value i wanted to see if there was any slick way using lambda expressions (instead of having to have loops and a number of if statements.)

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• Grails searchable plugin with hasMany

  - by user2624442

  I am using grails searchable plugin to search my domain classes. However, I cannot yet search by my hasMany (skills and interests) fields even though they are of the simple type String. This is my domain class: class EmpactUser { static searchable = [except: ['dateCreated','password','enabled','accountExpired','accountLocked','passwordExpired']] String username String password boolean enabled = true boolean accountExpired boolean accountLocked boolean passwordExpired String email String firstName String lastName String address String phoneNumber String description byte[] avatar byte[] resume Date dateCreated static hasMany = [ skills : String, interests : String, // each user has the ability to list many skills and interests so that they can be matched with a project. ] static constraints = { username blank: false, unique: true password blank: false email email: true, blank: false firstName blank: false lastName blank: false description nullable: true address nullable: true avatar nullable: true, maxSize: 1024 * 1024 * 10 resume nullable: true, maxSize: 1024 * 1024 * 10 phoneNumber nullable: true, matches: "/[(][+]d{3}[)]d+/", maxSize: 30 } } This is the code I am using to search: def empactUserList = EmpactUser.search( searchQuery, [reload: false, result: "every", defaultOperator: "or"]) Am I missing something? Thanks, Alan.

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• How do I filter or retain duplicates in Perl?

  - by manu

  I have one text string which is having some duplicate characters (FFGGHHJKL). These can be made unique by using the positive lookahead: $ perl -pe 's/(.)(?=.*?\1)//g'] For example, with "FFEEDDCCGG", the output is "FEDCG". My question is how to make it work on the numbers (Ex. 212 212 43 43 5689 6689 5689 71 81 === output should be 212 43 5689 6689 71 81) ? Also if we want to have only duplicate records to be given as the output from a file having n rows 212 212 43 43 5689 6689 5689 71 81 66 66 67 68 69 69 69 71 71 52 .. Output: 212 212 43 43 5689 5689 66 66 69 69 69 71 71 How can I do this?

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• HTML anchor #bottom, only going half-way down page

  - by RewbieNewbie

  http://www.planet-tolkien.com/board/44/621/0/poll-suggestions It's due to the multiple "bottom of the page" anchor links on each post to the anchor name at the bottom of the page. I tried to solve this by using a unique id and name for the attributes: <a href="#bottom" id="4656" name="4656"> But this hasn't worked. Suggestions? P.S. Don't use the URL bar, yes that works. Visit the page and click on a link in a post that says "Bottom of the page". This is where it isn't working.

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• C# How to Identify Caller for Template Events

  - by mikeknoop

  I have a ListBox container data bound and templatized as so: <ListBox x:Name="ListBox" ItemsSource="{Binding Source={StaticResource List}}" ItemTemplate="{StaticResource ListTemplate}"> </ListBox> Within my ListTemplate resource, I define a Grid which contains a few child elements. I have setup a click event handler on one of child elements. The event hander is not row-specific, and I need a (best practice) way of identifying which row in the ListBox the event fired upon. From my data source, I have an unique ID which corresponds to the row. I do not currently expose this ID in the data binding, though could. Ideally I would like the event handler to be able to identify the ID of the row the event was fired upon. Thank you!

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• jquery add remove objects

  - by Scarface

  Hey guys quick question, I have an add remove script that will add a unique element and should remove it on a click function but does not. I think it is because the added object is not in the DOM when page is loaded but I am not sure how to fix this. IF anyone has any advice I would greatly appreciate it. $(document).ready(function(){ if (action=='content-change'){ $('#droppable2-inner').empty().append('<div id="content-image"><img id="visual-background2" src=' + src + '></div><div id="drop-content" action="drop-image">x</div>'); } $("#drop-content").click(function() { $('#content-image').remove(); }); })

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• JavaScript OOP problem

  - by Danmark

  I create windows like this: var obj = document.createElement('div'); obj.className = 'window'; obj.style.width = 300 + 'px'; obj.style.height = 200 + 'px'; obj.style.left = 30 + 'px'; obj.style.top = 200 + 'px'; //and so on and what I need is to attach some data to each window. The data will be grabbed via Ajax and displayed in the windows. How should I do it so that each window hold its own unique data? I don't need to display the whole data every time and this data would need be organized before being displayed, so I can't just add it with innerHTML. I need a way to hold it somewhere else where I could easily get it and then display it with innerHTML.

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• It is the arranging game in which

  - by bachchan

  1 2 3 13 5 4 7 10 6 14 11 9 8 15 12 1.Every time when we refresh the page the numbers in the cells will change but the These numbers will remain unique n from 1 to 15 2.Whenever we double click the number in the cell which is surrounded the empty cell then it will replace the empty cell with that number n that number cell become empty. 3.If we double click the cell which is not surrounded the empty cell then it will not replace the empty cell. 4.e.g. if we click 8 then it will not move to empty cell But if we click either 13, 7 , or 11 then it will move to empty cell 5.And every time when we click the cell it’s num color will change for a moment

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• MySQL UPDATE WHERE IN for each listed value separately?

  - by Tom

  Hi, I've got the following type of SQL: UPDATE photo AS f LEFT JOIN car AS c ON f.car_id=c.car_id SET f.photo_status=1 , c.photo_count=c.photo_count+1 WHERE f.photo_id IN ($ids) Basically, two tables (car & photo) are related. The list in $ids contains unique photo ids, such as (34, 87, 98, 12). With the query, I'm setting the status of each photo in that list to "1" in the photo table and simultaneously incrementing the photo count in the car table for the car at hand. It works but there's one snag: Because the list can contain multiple photo ids that relate to the same car, the photo count only ever gets incremented once. If the list had 10 photos associated with the same car, photo_count would become 1 .... whereas I'd like to increment it to 10. Is there a way to make the incrementation occur for each photo individually through the join, as opposed to MySQL overthinking it for me? I hope the above makes sense. Thanks.

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• Using regex to strip out certain data from HTML code via PHP

  - by Chris

  I have the following HTML snippet <tr> <td class="1">...</td> <td class="2">...</td> <td class="3">...</td> <td class="4">...</td> </tr> etc... I basically have N rows, and each row contains 4 TD's each with a unique class. I would like a simple way to split out all the rows and TD's by class so I can choose what data I want to use. I expect the easiest way to achieve this would be regex (maybe two). One to split up the TR's then another to split up the TDs (by class preferably) Thanks

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• Calculating similarites between sentences

  - by codecreator

  I have datbase with thousands of rows of error logs and their description.This error log is for an application that running 24/7. I want to create a dashboard/UI to view the current common errors happening for prodcution support. The problem I am having is that even though there are lot of common errors, the error description differs by the transcation ID or user ID or things that are unique for that sigle prcoess. e.g Error trasaction XYz failed for user 233 e.g 2. Error trasaction XYz failed for user 567 I consider these two erros to be same. So I want to a program that will go through the new error logs and classify them into groups. I am trying to use "edit distance" but its very slow.Since I alraedy have old error logs, i am trying to think of solutions using that information too. Any thoughts?

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• What is the difference between "a is b" and "id(a) == id(b)" in Python?

  - by bp

  The id() inbuilt function gives... an integer (or long integer) which is guaranteed to be unique and constant for this object during its lifetime. The is operator, instead, gives... object identity So why is it possible to have two objects that have the same id but return False to an is check? Here is an example: >>> class Test(): ... def test(): ... pass >>> a = Test() >>> b = Test() >>> id(a.test) == id(b.test) True >>> a.test is b.test False A more troubling example: (continuing the above) >>> b = a >>> b is a True >>> b.test is a.test False >>> a.test is a.test False

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• document.getElementByIdContains?

  - by johnshaddad

  Hello Is there, by any chance, a way to solve this problem: I have elements that have IDs such as "x_y_z". The unique part is "x_y", thus there is no two items that have the same combination of x and y.. However, using getElementById won't work because when I do it I only have the "x" and "y" part and not the Z (think of Z as a random incremental counter). Is there a way around this? So that when I have the "x" and "y" I say something like getElementByIdContains("x_y")? Thanks!

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• Should I use polymorphic association, just a has_one, or attribute in this case?

  - by Angela

  I have three Models: Contact_Email, Contact_Letter, and Contact_Call. These represent the unique pairing of a Contact with a template for each of the three. For all of these, I want to record at least a status and date for the status. For example, "declined" on 5/10/10 or "responded" on 5/10/10 or something like that. I may in the future want to extend that. I later do want to be able to see all the instances that have the same status, such as "responded" or "meeting requested." What is the best way to do this? To make the three Contacts statusable and create a polymorphic association on a model called Status. Or just each Object of Contact_Email has_one Status?

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• Sphinx without using an auto_increment id

  - by squeeks

  I am current in planning on creating a big database (2+ million rows) with a variety of data from separate sources. I would like to avoid structuring the database around auto_increment ids to help prevent against sync issues with replication, and also because each item inserted will have a alphanumeric product code that is guaranteed to be unique - it seems to me more sense to use that instead. I am looking at a search engine to index this database with Sphinx looking rather appealing due to its design around indexing relational databases. However, looking at various tutorials and documentation seems to show database designs being dependent on an auto_increment field in one form or another and a rather bold statement in the documentation saying that document ids must be 32/64bit integers only or things break. Is there a way to have a database indexed by Sphinx without auto_increment fields as the id?

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• Scalable stl set like container for C++

  - by Pqr

  Hi, I need to store large number of integers. There can be duplicates in the input stream of integers, I just need to store distinct amongst them. I was using stl set initially but It went OutOfMem when input number of integers went too high. I am looking for some C++ container library which would allow me to store numbers with the said requirement possibly backed by file i.e container should not try to keep all numbers in-mem. I don't need to store this data persistently, I just need to find unique values amongst it.

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• How can I use Javascript to access sub-elements?

  - by Steve

  I am dynamically creating forms dynamically according to a users actions. It is an entry-box and a two "buttons" for each instance. Each instance will be wrapped in a unique div tag. What I tried to do without success is when I dynamically create the "button" I attach a function with the input variable containing the div of its instance. This a brief excerpt: var newDivClass = document.getElementById("instance"+1); button1.innerHTML = "<a href=\"#\" onclick=\"buttons("+newDivClass+");\" id=\"button1\"> Button1 </a>"; function buttons(selected) { //I want this to select the first instance //of button1 found within div newDivClass selected.getElementById("button1"); //I also tried //this.getElementById("button1"); //selected.getChildren[0]; } The problem appears to be in passing newDivClass to the the actual function.

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• generate 10 UUID records and save it it database in rails

  - by user662503

  I need to create certain number of UUId records (based on the selection of a drop down) and save them in the database. Now I am generating only one unique id. Can this be done in the model in this way? Or do I need to write a helper file for that? def generate_unique_token=(value) self.secret = Base64.encode64(UUIDTools::UUID.random_create)[0..8] end My controller: def create @secretcode = Secretcode.new(params[:secretcode]) @user = User.new(params[:user]) @secretcode.user_id = @user @secretcode.generate_unique_token = params[:secretcode][:secret] if @secretcode.valid? @secretcode.save redirect_to secretcodes_path else render 'new' end end My view page <%= form_for(@secretcode) do |f| %> <%= f.select(:secret, options_for_select([['1',1], ['10',10], ['20',20],['50',50]['100',100]])) %> <%= render 'layouts/error' %> <%=f.label :secret%> <%= f.hidden_field :user %> <%=f.submit :generate %> <% end %>

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• When open-sourcing a live Rails app, is it dangerous to leave the session key secret in source contr

  - by rspeicher

  I've got a Rails app that's been running live for some time, and I'm planning to open source it in the near future. I'm wondering how dangerous it is to leave the session key store secret in source control while the app is live. If it's dangerous, how do people usually handle this problem? I'd guess that it's easiest to just move the string to a text file that's ignored by the SCM, and read it in later. Just for clarity, I'm talking about this: # Your secret key for verifying cookie session data integrity. # If you change this key, all old sessions will become invalid! # Make sure the secret is at least 30 characters and all random, # no regular words or you'll be exposed to dictionary attacks. ActionController::Base.session = { :key => '_application_session', :secret => '(long, unique string)' } And while we're on the subject, is there anything else in a default Rails app that should be protected when open sourcing a live app?

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• Counting builds

  - by moz

  I have a dozen of build plans managed by a unique build agent. What I want to do, is to get the total number of triggered/scheduled builds (without counting them manually from the interface). So, question is, is there a kind of counter on the server? UPDATE #1: I'm using the v2.2.1. UPDATE #2: On the server interface (Administration - System - System Information), there are some statistics including how many builds the server performed. But, this number is reinitialized when the server goes down.

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• How to break up a table holding 100mil+ number of records?

  - by Chiao

  We're currently storing answers for 52 predefined questions for our clients in our matchmaking site. we have over 30million unique users summing up for worst case of a 52x30million rows. Of these 52 questions, 11 are required and always answered. Our previous solution was to open an answer table for each question. This solution distributed our answer rows for faster insert/delete/update. But it also caused us an unconventional programming such as dynamically opening a table each time a question is added/updated, or removing an answer table if it was to be destroyed permanently. We want to come up with a better solution for our third version but could't get very far yet. Any ideas to accomplish this in any other, perhaps a more conventional, way?

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• How to inherit from a generic parameter?

  - by Bob

  I'm basically wanting to do this: class UILockable<T> : T where T : UIWidget { } However, this doesn't work. I've seen people recommend that you do this: class UILockable<T> where T : UIWidget { private T _base; } This would require me to override each function UILockable would need and forward it to T. This is impossible since T may derive from UIWidget and have unique abstract/virtual methods of its own. Is there no way to simply inherit from T?

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• Select photo while keep the order

  - by wong2

  I have a list of photo on the page, each have an unique id, user can click on them to toggle select the photo, when they click the submit button, I need to send the array of selected photo ids to the back end, in the order that the photo was selected. I think that the fastest way to track if a photo is selected is to use an object that use photo id as key, like: var selected = { "6272861": true, "6272888": true } when the user unselect a photo, I just need to delete selected["6272861"]. But this will ignore the order, if I use an array to keep the selected photos: var selected = ["6272861", "6272888"]; then when I need to unselect a photo, I have to loop through the array and delete the item. Is there better ways? thanks.

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• Vim: `cd` to path stored in variable

  - by tsyu80

  I'm pretty new to vim, and I'm having a hard time understanding some subtleties with vim scripting. Specifically, I'm having trouble working with commands that expect an unquoted-string (is there a name for this?). For example cd some/unquoted/string/path The problem is that I'd like to pass a variable, but calling let pathname = 'some/path' cd pathname will try to change the current directory to 'pathname' instead of 'some/path'. One way around this is to use let cmd = 'cd ' . pathname execute cmd but this seems a bit roundabout. This StackOverflow question actually uses cd with a variable, but it doesn't work on my system ("a:path" is treated as the path as described above). I'm using cd as a specific example, but this behavior isn't unique to cd; for example, the edit command also behaves this way. (Is there a name for this type of command?)

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