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• How to store private pictures and videos in Ruby on Rails

  - by TK

  Here's a story: User A should be able to upload an image. User A should be able to set a privacy. ("Public" or "Private"). User B should not be able to access "Private" images of User A. I'm planning to user Paperclip for dealing with uploads. If I store the images under "RAILS_ROOT/public/images", anyone who could guess the name of the files might access the files. (e.g., accessing http://example.com/public/images/uploads/john/family.png ) I need to show the images using img tags, so I cannot place a file except public. How can I ensure that images of a user or group is not accessible by others?

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• Is wrapping new within the constructor good or bad?

  - by Timothy

  I watched John Resig's Best Practices in JavaScript Library Design presentation; one slide suggested "tweaking" the object constructor so it instantiates itself. function jQuery(str, con) { if (window === this) { return new jQuery(str, con); } // ... } With that, new jQuery("#foo") becomes jQuery("# foo"). I thought it was rather interesting, but I haven't written a constructor like that in my own code. A little later I read a post here on SO. (Sorry, I don't remember which or I'd supply a link. I will update the question if I can find it again.) One of the comments said it was bad practice to hide new from the programmer like that, but didn't go into details. My question is, it the above generally considered good, bad, or indifferent, and why?

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• Graph call "/me/friends" doesn't contain names if called from a testuser

  - by Marc

  When I log into Facebook with my account and call the Graph API with /me/friends it returns an array like this: [ {id: "6868...", name: "John Smith"}, {id: "7531...", name: "Diane Smith"}, ... ] But if I'm logged in with a Facebook testuser and do the same call I get an array like this: [ {id: "100002927..."}, {id: "100003151..."}, ... ] So I'm missing the name property. Bug? Or did I some mistake? I'm using the JS SDK, but I think that doesn't matter.

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• vista bandwith reservation

  - by user185646

  I would like to write my own version of Microsoft Live labs pivot.http://www.getpivot.com/ For this i will use realtime texture streaming technology like John Carmack did for doom4. But i would like to use Windows vista SetFileBandwidthReservation api to have the best throughput possible. For example // reserve bandwidth of 200 bytes/sec result = SetFileBandwidthReservation( hFile, 1000, 200, FALSE, &transferSize, &outstandingRequests ); What i dont understand is the lpTransferSize and lpNumOutstandingRequests return parameters. How should i next read the file for this to be the most worth it. Should i do exactly lpNumOutstandingRequests number of request of size lpTransferSize. Or can i do one synchronous request bigger than lpTransferSize.

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• Using jep.invoke() method

  - by hofsoc

  Hi, I need to call a function from a python script and pass in parameters into it. I have a test python script which I can call and run from java using Jepp - this then adds the person. Eg Test.py import Finding from Finding import * f = Finding() f.addFinding("John", "Doe", 27) Within my Finding class I have addFinding(firstname, lastName, age) However, I wish to be able to do this from within java. Should I be using the jep.invoke() method. Does anyone have a hello world example of such a thing being done or forward me to some good examples? Does anyone have any suggestions please? Thanks in advance

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• How to get the position of a record in a table (SQL Server)

  - by Peter Siegmann

  Following problem: I need to get the position of a record in the table. Let's say I have five record in the table: Name: john doe, ID: 1 Name: jane doe, ID: 2 Name: Frankie Boy, ID: 4 Name: Johnny, ID: 9 Now, "Frankie Boy" is in the third position in the table. But How to get this information from the SQL server? I could count IDs, but they are not reliable, Frankie has the ID 4, but is in the third position because the record with the ID '3' was deleted. Is there a way? I am aware of ROW_RANK but it would be costly, because I need to select basically the whole set first before I can rank row_rank them. I am using MS SQL Server 2008 R2.

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• Multiple layout UserControl

  - by johnm01

  Hi all, I have a UserControl that manages a lot of editable information (like text-boxes). Now I need to make a version of this control that has a different layout (from horizontal to vertical). I can expose the control, like this: public TextBox MyText { get { return myText; } set { myText = value; } } i can now manually change the location and size, but this does not give me a visual reposition of them at design time. Is there a better way of doing this ? Thanks John

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• add text to curved image

  - by miki123

  $config['source_image'] = '/path/to/image/mypic.jpg'; $config['wm_text'] = 'Copyright 2006 - John Doe'; $config['wm_type'] = 'text'; $config['wm_font_path'] = './system/fonts/texb.ttf'; $config['wm_font_size'] = '16'; $config['wm_font_color'] = 'ffffff'; $config['wm_vrt_alignment'] = 'bottom'; $config['wm_hor_alignment'] = 'center'; $config['wm_padding'] = '20'; $this->image_lib->initialize($config); $this->image_lib->watermark(); This is water mark code in php, it is working fine when we add text to curve image like mug image, the letter is not overlap the curved image how can we overcome?

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• SSRS Multilookup Function for Names with Comma Separation

  - by AliceAyers292

  I would like to put the following in a a multilookup drop-down in reporting services: "Smith, John", "Jones, Tim", "Kelly, Andy" The comma separating the first and last name prevents the multilookup from working correctly. I am also unable to use ticks (' or ") in reporting service to keep the separating comma from working like a multilookup comma that separates the fields I want to select from. Is there a way to keep the comma in the names while still allowing multilookup? Any help would be much appreciated. Thank you!

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• Turning A Stacked List into workable data

  - by BoSox

  In Excel I have a list of names that in the cell appear stacked, and I want each name in its own column. I was thinking Python may be a good way to do this? Example: Joe Smith John Hawk Mike Green Lauren Smith One cell will look exactly like that, with each name on its line within the cell but all of the names contained in the cell. I have 50 cells each with 1-20 stacked names and I want to put each name in its own cell on a given row. So, in my example all of those names would occupy the same row but each would have their own column. Any ideas?

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• reading 2 lines from IniFile

  - by Lakkerw

  Trying again. On advice, adding the piece of code that I do understand. I am fine with the fact that I have to save 4 bits of information in two lines like so: IniFile.WriteString('TestSection','Name','Country'); IniFile.WriteString('TestSection','City','Street'); My question is more about loading this information back into the form. If in my IniFile I have saved for example the following code [TestSection] John=Uk London=barlystreet Mike=Spain Madrid=eduardostrata Emma=USA New York=1st Avenue Made up information in the IniFile. Added through the code above. Now my question is: How could I load for example, when I type in an edit box Mike, the rest of the belonging information.(Spain, Madrid,eduardostrata).

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• Need help with ruby radiant cms

  - by AnimalCode

  I have some hidden pages like this: /staff John Bob Mike In all this pages i have extended content, like photo, bio and additional info. I make this, to have logical structure and quick edit without editing radiant code. My question is, how i can with base radius functional get access to this pages in this code: <r:find url="/staff"> <r:children:each by="title" order="asc"> <r:title /> </r:children:each> </r:find>

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• Gruber URL Regex tweak to capture "domain.com"

  - by mootymoots

  I found an updated version of John Gruber's regex for url matching in this post by user GianPac, which states it's been adapted to recognize url without protocol or the www part: (?i)\b((?:[a-z][\w-]+:(?:/{1,3}|[a-z0-9%])|www\d{0,3}[.]|[a-z0-9.-]+[.][a-z]{2,4}/?)(?:[^\s()<]+|(([^\s()<]+|(([^\s()<]+)))))(?:(([^\s()<]+|(([^\s()<]+))))|[^\s`!()[]{};:'\".,<?«»“”‘’])) Whilst this works in most cases, I found it does not match "google.com". It does match "google.comm" and "google.co.uk", so this must be a small oversight. The trouble is, I literally hate regex. It's the bane of my life. I just want to try and tweak this one more time to allow for "google.com" - can anyone throw me a pointer? I (think) it's something to do with this part of the code: +[.][a-z]{2,4}/?) ?

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• Something similar to this C# code in Ruby on Rails

  - by Jimmy

  Hey guys, I am trying to get a collection of objects based on a conditions. Now normally in C# I would do something like this employeesCollection.Where(emp => emp.Name == "john"); how can I do something similar in Ruby on Rails (I am trying to map a collection of objects to a select but I only want to map certain objects that match a condition. My current ruby on rails code looks like this <%= select( 'page', 'id', @post.pages.map {|page| [page.title, page.id]}) %> I want to add a condition to an attribute of page Can anyone help?

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• Display loading image while post with ajax

  - by DonJoe

  I know there are thousands of examples on the internet, but I want for the script I already have to display a loading gif image while the data is retrievedd. My java knowledge are poor, therefore I'm asking how to change the following: <script type="text/javascript"> $(document).ready(function(){ function getData(p){ var page=p; $.ajax({ url: "loadData.php?id=<? echo $id; ?>", type: "POST", cache: false, data: "&page="+ page, success : function(html){ $(".content").html(html); } }); } getData(1); $(".page").live("click", function(){ var id = $(this).attr("class"); getData(id.substr(8)); }); }); </script> And my div is here: <div class="content" id="data"></div> Thanks. John

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• Adding values from different tables

  - by damdeok

  Friends, I have these tables: Contestant Table: Winner Peter Group Table: Id Name Score Union 1 Bryan 3 77 2 Mary 1 20 3 Peter 5 77 4 Joseph 2 25 5 John 6 77 I want to give additional score of 5 to Peter on Group Table. So, I came up with this query. UPDATE Group SET Score = Score+5 FROM Contestant, Group WHERE Contestant.Winner = Group.Name Now, I want also to give additional score of 5 to the same Union as Peter which is 77. How can I integrate it as one query to my existing query?

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• PHP While Loops from Arrays

  - by Michael

  I have a table that contains members names and a field with multiple ID numbers. I want to create a query that returns results where any values in the ID fields overlap with any values in the array. For example: lastname: Smith firstname: John id: 101, 103 I have Array #1 with the values 101, 102, 103 I want the query to output all members who have the values 101 or 102 or 103 listed in their id field with multiple ids listed. Array ( [0] => 101 [1] => 102 [2] => 103 ) $sql="SELECT firstname, lastname, id FROM members WHERE id LIKE '%".$array_num_1."%'"; $result=mysql_query($sql); while ($rows=mysql_fetch_array($result)) { echo $rows['lastname'].', '.$rows['firstname'].'-'.$rows['id']; }

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• How to Track Number of Changes Occured in a Column? T-SQL - SQL Server

  - by user327387

  For example, i have a column named EmployeeName. Every time a user changes/fix his name, i need to keep a count. If he changes his name twice, then count is 2. Also, i need to store the time of every change employee makes on EmployeeName e.g. if the name essentially is James and time created is 9:00 AM and then employee changes to John on 11:00 AM, i need to preserve this new time and new value as well as the previous one which is James at 9:00 AM. I hope its clear! Thank you guys...Best Answer will be chosen... If this requires a trigger, giving a sketchy pseudo-code will be very much appreciated.

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• F# books question

  - by Michiel Borkent

  I am now reading Foundations of F# by Robert Pickering and parallelly the book in progress 'Real World Functional Programming' by Tomas Petricek. My question is, what is the added value I would get from buying and reading the following books: 1) Expert F# by Don Syme and others 2) F# for Scientists by John Harrop Are those books still up to date with the current CTP version. What are things to keep notice of with respect to the recent changes in the language? Will there be reprinted updated versions? Also I want to learn more about datamining techniques with F# as a tool for this. What are good books to read next on this topic?

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• Why first arg to execve() must be path to executable

  - by EBM

  I understand that execve() and family require the first argument of its argument array to be the same as the executable that is also pointed to by its first argument. That is, in this: execve(prog, args, env); args[0] will usually be the same as prog. But I can't seem to find information as to why this is. I also understand that executables (er, at least shell scripts) always have their calling path as the first argument when running, but I would think that the shell would do the work to put it there, and execve() would just call the executable using the path given in its first argument ("prog" from above), then passing the argument array ("args" from above) as one would on the command line.... i.e., I don't call scripts on the command line with a duplicate executable path in the args list.... /bin/ls /bin/ls /home/john Can someone explain?

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• Algorithm to find a measurement of similarity between lists.

  - by Cubed

  Given that I have two lists that each contain a separate subset of a common superset, is there an algorithm to give me a similarity measurement? Example: A = { John, Mary, Kate, Peter } and B = { Peter, James, Mary, Kate } How similar are these two lists? Note that I do not know all elements of the common superset. Update: I was unclear and I have probably used the word 'set' in a sloppy fashion. My apologies. Clarification: Order is of importance. If identical elements occupy the same position in the list, we have the highest similarity for that element. The similarity decreased the farther apart the identical elements are. The similarity is even lower if the element only exists in one of the lists. I could even add the extra dimension that lower indices are of greater value, so a a[1] == b[1] is worth more than a[9] == b[9], but that is mainly cause I am curious.

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• C# XML Serialisation Only Serialise Single Element in List

  - by guazz

  Given some sample XML such as: <XML> <EMPLOYEES> <EMPLOYEE isBestEmployee="false">John"<"/EMPLOYEE> <EMPLOYEE isBestEmployee="true">Joe"<"/EMPLOYEE> <EMPLOYEE isBestEmployee="false">Bill"<"/EMPLOYEE> </EMPLOYEES> </XML> How do I serialise just the employee with isBestEmployee="true" to a single Employee object?

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• Wizard based feature install in sharepoint 2007?

  - by JL

  I have a feature that gets installed using a WSP package, when the feature is activated, I would like the following to happen: The feature will contain a list definition. When the feature gets activated by an end user (the user physically clicks the feature activation button in site features admin) - I would like a modal dialog to appear then ask the user to provide some additional details. 3.1 The additional details will be supplying a certain number of names. For example Mary, John, Peter. Form logistics I can handle. Once the form is complete that information needs to somehow get back to the feature reciever, so that I can then take the base list definition, and use it as a template to create list instances for all the names supplied - so if user had supplied Mary and Peter, then 2 list instances will be created when this feature is activated. Is any of this possible with MOSS 2007? Thank you

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• Valid Email Addresses - XSS and SQL Injection

  - by PAAMAYIM_NEKUDOTAYIM

  Since there are so many valid characters for email addresses, are there any valid email addresses that can in themselves be XSS attacks or SQL injections? I couldn't find any information on this on the web. The local-part of the e-mail address may use any of these ASCII characters: Uppercase and lowercase English letters (a–z, A–Z) Digits 0 to 9 Characters ! # $ % & ' * + - / = ? ^ _ ` { | } ~ Character . (dot, period, full stop) provided that it is not the last character, and provided also that it does not appear two or more times consecutively (e.g. John[email protected]). http://en.wikipedia.org/wiki/E-mail_address#RFC_specification I'm not asking how to prevent these attacks (I'm already using parametrized queries and HTML purifier), this is more a proof-of-concept. The first thing that came to mind was 'OR [email protected], except that spaces are not allowed. Do all SQL injections require spaces?

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• iPhone App Development - mathematical sysmbols

  - by mcglynnconsultancy

  I am quite the beginner - but I have a lot of experience with respect to Electrical Engineering and formulas - over 30 years worth! Trying to construct an app for the iPhone. Loaded the SDK, bought myself a Mac, got a couple of "Chapter" pages written by John at Alpha Aviation - who recomended I try this site. How do I - well for example I enetered 400/1.732 - it came out like it was a web address with an underline! How can I get mathematical symbols like - sqare root, to the power of, subscript, superscript. I'd like to insert a few "calculator" pages but don't know how to. Appreciate I have only been doing this for the last week or so - so I am still quite rusty compared to what I wrote many years ago. Can anyone help? cheers

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