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• authorization services question cocoa

  - by Marius

  Sorry for being a total beginner in cocoa and for asking the following stupid question, but it's too confusing for me to google it myself or maybe i'm just missing something. I need to run a shellscript with elevated privileges in cocoa. As i understand, "AuthorizationExecuteWithPrivileges" is the correct way to do it. So i've created an application and tried to use some code from one example i found online. The problem is ... if i understand it correctly ... there should be a Security framework in /System/Library/Frameworks that i have to import to the project, but ... it's not there. What am i missing here? Thank you.

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• Lock web app only work for intranet

  - by justjoe

  some week in the future i will have job to create php web app that will work as billing process. As the client and my team agree upon, the web app will only deploy in their internal server. This need arose some fundamental questions for myself. how do we lock the web app really really will work only in internal server and not in internet as it asked ? cause this need, the cost for the job have been cut into some degree. so it will be best if it only work as client describe it : it will be deploy in intranet an intranet only What is the pro and cons deploy php application only (with all of its apache server )in intranet ? What is the fundamental different between deploying php app in intranet environment and in internet ? is there anything to be consider ? I know we can put windows in to a flash-disk or pen-disk. i there any autorun apache/php server that work in the same fashion ?

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• Converting the DOM element in a String

  - by Hsm Sharique Hasan

  I am working on svg. I made some shapes in svg using my javascript code. Now what i have to do is to get that code of svg which has been made as i draw some thing. i want to get that code in a form of string so for the sake of reuse or if can put that code in a .svg file it outputs the same what i made by myself using my javascript code. Like My code made this <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="500" height="500" id="one"> <g id="container"> <rect id ="rect" x="0" y="0" width="0" height="0" fill="pink" stroke="blue" stroke-width="2" /> </g> Now what should i do to get all the code from to in a form of string and i can print that.

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• Unable to bind with any property of UserControl

  - by Agha Khan

  I looked your answer where I was also using this.DataContext=this. I am unable to convince myself why I have to remove it? But I did In my UserControl control I have 6 int properties (RedCount, GreenCount …) I am using .NET 3.5 and basically I wanted to use StringFormat with Binding. In my xaml file I have 6 Labels with I would like to bind, and I did what exactly you told in last reply. For some strange reasons it didn’t work. I don't know why it does not work. I placed break point in converter where I never hit it. This imples Binding failed.

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• Which is quicker? Memcache or file query? (using maxmind geoip.dat file)

  - by tomcritchlow

  Hi, I'm using Python on Appengine and am looking up the geolocation of an IP address like this: import pygeoip gi = pygeoip.GeoIP('GeoIP.dat') Location = gi.country_code_by_addr(self.request.remote_addr) (pygeoip can be found here: http://code.google.com/p/pygeoip/) I want to geolocate each page of my app for a user so currently I lookup the IP address once then store it in memcache. My question - which is quicker? Looking up the IP address each time from the .dat file or fetching it from memcache? Are there any other pros/cons I need to be aware of? For general queries like this, is there a good guide to teach me how to optimise my code and run speed tests myself? I'm new to python and coding in general so apologies if this is a basic concept. Thanks! Tom

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• How to implement a ilike Facebook system without user authentication and still prevent users from cheating ?

  - by fabien7474

  Hi, I am trying to implement something done in almost any website out there : a 'ilike' button (like Facebook) that does not require user authetication to be used for any article of my website written in Grails. I don't want to use any external solution, so I need to implement it myself (or use a grails plugin). So my question is : What does it take to implement this 'ilike' button and prevent users from cheating? For instance, do I need to store local cookies (I suppose yes)? Do I need to check the session ID and IP of the HTTP request? Any well-known implementation are welcomed. Thank you very much for your help.

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• How long does a MailItem.Property[myProperty] live?

  - by Darien Ford

  I'm writing a TransportAgent for Exchange and want to tag a MailItem with some identifying information. The MailItem class seems to have this functionality with the MailItem.Properties property; however, my question is to the length of time an entry would remain available. e.g. e.MailItem.Properties.Add(new KeyValuePair<string,object>("MyKey", "myValue")); After this MailItem is delivered to the correct mailbox, if someone were to reply to the email, would the newly created reply retain that set value? I think while writing this question out I have answered it for myself (which rationally would be no) but any practical experience and insight would be appreciated.

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• Jquery .html and .load

  - by Jack Pilowsky

  I'm trying to teach myself jQuery and I'm a little stomped with the load() method. I'm working on eBay listings. Yes, I know includes are not allowed on ebay. However, there is a workaround that has been around for a few years and ebay doesn't seem to be cracking down on it. var ebayItemID='xxxxxxxxxxxxxx'; // This is eBay code. I cannot edit it. <h1 id="title"> TO BE REPLACED</h1> $(document).ready(function(){ var link = "http://www.ebay.com/itm/" + ebayItemID + "?item=" + ebayItemID + &viewitem=&vxp=mtr"; var newTitle = $('#title').load(link + "#itemTitle"); $('#title').html(newTitle); }); What's the point of this. I want to show the item title on the description, but I want to do so dynamically,

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• How can I make a USB flash drive appear/not appear as a CD drive?

  - by mmyers

  I recently was given a small USB flash drive as an advertising gimmick. When I plug it in, only one drive appears: a CD drive with 42kb used (just an autorun.inf file which launches the manufacturer's website). I know U3 drives also appear as CD drives, but their uninstall utility only works for their own drives. How can I make it appear as a USB drive instead? Conversely, if I wanted to do the same thing for myself, how would I make it appear as a CD drive? I'm sure it can be done programmatically, or else the uninstall program wouldn't work.

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• What are good resources for computer graphics basics?

  - by Hanno Fietz

  During Flex programming, I recently ran into several questions (about box models, ways to join lines and misaligning pixels [on doctype]) regarding computer graphics and layout, where I felt that I lacked some basic background on things like concepts like the box model approaches mapping real numbers to a pixel raster (like font anti-aliasing) conventions found across drawing engines, like do you count y coordinates from top or bottom, and why I feel that reading some basic Wikipedia articles, books or tutorials on these subjects might help in phrasing my questions more specifically and debugging my code more systematically. I have repeatedly found myself writing tiny test apps in Flex, just to find out how the APIs do very basic stuff. My assumption would be that if I knew the right vocabulary and some general concepts, I could solve these questions much faster.

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• Stop PHP from creating arrays in $_POST superglobal

  - by cdmckay

  PHP will automatically convert <input type="text" name="foo[0]" value="x" /> <input type="text" name="foo[1]" value="y" /> into $_POST['foo'] = array( 0 => 'x', 1 => 'y' ); Which is what you want most of the time. However, in this case I would like this not to happen. Is there anyway to tell PHP to not do this? I realize I could parse php://input myself, but I'd rather not do that if I can avoid it. I also don't have the option of renaming the input names.

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• Is the ruby operator ||= intelligent?

  - by brad

  I have a question regarding the ||= statement in ruby and this is of particular interest to me as I'm using it to write to memcache. What I'm wondering is, does ||= check the receiver first to see if it's set before calling that setter, or is it literally an alias to x = x || y This wouldn't really matter in the case of a normal variable but using something like: CACHE[:some_key] ||= "Some String" could possibly do a memcache write which is more expensive than a simple variable set. I couldn't find anything about ||= in the ruby api oddly enough so I haven't been able to answer this myself. Of course I know that: CACHE[:some_key] = "Some String" if CACHE[:some_key].nil? would achieve this, I'm just looking for the most terse syntax.

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• jquery vote up down, request for some help

  - by Billa

  I want to make some changes in the following piece of code. The demo of the code can be seen here. http://cyberbuff.noadsfree.com/lab/reddit_votes/ The above example shows calculated number of votes (vote ups - votes down). And when you click on any thumbe, it disappears the thumbs and shows the updated votes. I want to make changes that in begining it shows vote up and vote down separately (which are stored in database separately). and after thumb up or down is pressed, it should not remove the thumbs, but it should show the updated vote up and down separatetly. As shown in the image below. Here are pieces of code: Main page having html/CSS and jquery code. http://pastebin.com/RC6dj6N5 vote processng code: http://pastebin.com/heszKyDc PS. I have tried to change by myself but I could not do. Any help will be much appriciated. Thanks.

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• code-style: Is inline initialization of JS objects ok?

  - by michael

  I often find myself using inline initialization (see example below), especially in a switch statement when I don't know which case loop will hit. I find it easier to read than if statements. But is this good practice or will it incur side-effects or a performance hit? for (var i in array) { var o = o ? o : {}; // init object if it doesn't exist o[array[i]] = 1; // add key-values } Is there a good website to go to get coding style tips?

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• Silverlight calling windows workflow foundation as a web service

  - by wissem

  hi, I'm trying to call a windows workflow foundation published as a web service from a Silverlight project. When I call it from a console application it works fine because I can add a web reference then I just make an instance of that webservice then I invoke the method I want. The problem is in the silverlight project cause i can just add a service reference so I find myself working with soap stuff that doesn't work at all, and here is the code: private void btnUpdate_Click(object sender, RoutedEventArgs e) { xxxxxxx.Workflow1_WebServiceSoapClient zer = new xxxxx.Workflow1_WebServiceSoapClient(); zer.demanderSubmitReportCompleted += new EventHandler<xxxxxxxxxxxxxxx.demanderSubmitReportCompletedEventArgs>(service2); zer.demanderSubmitReportAsync("zzz", 20000); } public void service2(object sender, xxxxx.demanderSubmitReportCompletedEventArgs e) { string a = e.Result; } plz help ,thanks

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• How Does a Login system generally work with OOP?

  - by fakingfantastic

  Sorry if this is a badly formed question, but I'm trying to make my web applications (using PHP) more OO. *EDIT* I'm developing the Framework myself */EDIT* Everything is great so far, I've made a Front Controller system that taps into a MVC system. The FC figures out what page you want, loads the specific page Controller (*EDIT* which extends an abstract Controller Object */EDIT*), which gets anything it needs from Models, and then calls the appropriate View. Very basic. But now, I need to make an admin section (quasi-CMS). How does a login system fit into the grand scheme of things? Do you set controllers as needing a login? If so, how? What If you only want certain views of a controller requiring login? Thanks in advance.

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• What are the performance characteristics of SignalR at scale?

  - by Joel Martinez

  I'm interested in the performance characteristics of SignalR at scale ... particularly, how it behaves at the fringes of capability. When a server is at capacity, what happens? Does it drop messages? Do some clients not get notified? Are messages queued until all are delivered? And if so, will the queue eventually overflow and crash the server? I ask because conducting such a test myself would be impractical, and I'm hoping someone could point me to documentation speaking to this ... or perhaps someone could comment that has seen how SignalR behaves at scale. Thanks! note: I'm familiar with this other stackoverflow question on the stability and scalability of SignalR. But I believe my question is asking a slightly different question in that I'm not concerned with the theoretical scaling limits, I want to know how it behaves when it reaches the limits ... so I know what to be on the lookout for.

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• Do we really need a safe release macro?

  - by Ian1971

  Quite a lot of people seem to use a macro such as #define SAFE_RELEASE(X) [X release]; X = nil; (myself included). I've been reassessing why I am using it and wanted to canvas some opinion. The purpose (I think) for using this macro is so that if you were to accidentally use your object after releasing it then you won't get a bad access exception because objective-c will quite happily ignore it when the object is nil. It strikes me that this has the potential to mask some obscure bugs. Maybe it would actually be preferable for the program to crash when you try to use X again. That way during testing you can find the issue and improve the code. Does this macro encourage lazy programming? Thoughts?

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• assignment vs std::swap and merging and keeping duplicates in seperate object

  - by rubenvb

  Say I have two std::set<std::string>s. The first one, old_options, needs to be merged with additional options, contained in new_options. I can't just use std::merge (well, I do, but not only that) because I also check for doubles and warn the user about this accordingly. To this effect, I have void merge_options( set<string> &old_options, const set<string> &new_options ) { // find duplicates and create merged_options, a stringset containing the merged options // handle duplicated the way I want to // ... old_options = merged_options; } Is it better to use std::swap( merged_options, old_options ); or the assignment I have? Is there a better way to filter duplicates and return the merged set than consecutive calls to std::set_intersection and std::set_union to detect dupes and merge the sets? I know it's slower than one traversal and doing both at once, but these sets are small (performance is not critical) and I trust the Standard more than I trust myself.

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• How to receive HTTP messages using Socket

  - by Poma

  I'm using Socket class for my web client. I can't use HttpWebRequest since it doesn't support socks proxies. So I have to parse headers and handle chunked encoding by myself. The most difficult thing is to determine length of content so I have to read it byte-by-byte. First I have to use ReadByte() to find last header ("\r\n\r\n" combination), then read chunk's size etc. But this approach has very poor performance. Can you suggest better solution? Maybe some open source examples or libraries that handle http request through sockets (not very big and complicated though, I'm a noob)

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• Any way to surround code block with Curly Braces {} in VS2008?

  - by Jim McKeeth

  I always find myself needing to enclose a block of code in curly braces { }, but unfortunately that isn't included in the C# surround code snippets, which seems to be an oversight. I couldn't find anything on building your own surround snippets either (just other kinds of snippets). I am actually running Resharper too, but it doesn't seem to have this functionality either (or I haven't figured how to activate it). We have a coding standard of including even a single line of code after an if or else in curly braces, so if I could just make Resharper do that refactor automatically that would be even better!

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• How often do you implement the big three?

  - by Neil Butterworth

  I was just musing about the number of questions here that either are about the "big three" (copy constructor, assignment operator and destructor) or about problems caused by them not being implemented correctly, when it occurred to me that I could not remember the last time I had implemented them myself. A swift grep on my two most active projects indicate that I implement all three in only one class out of about 150. That's not to say I don't implement/declare one or more of them - obviously base classes need a virtual destructor, and a large number of my classes forbid copying using the private copy ctor & assignment op idiom. But fully implemented, there is this single lonely class, which does some reference counting. So I was wondering am I unusual in this? How often do you implement all three of these functions? Is there any pattern to the classes where you do implement them?

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• System("pause"); - Why is it wrong?

  - by Faken

  Here's a question that I don't quite understand: The command, System("pause"); is taught to new programmers as a way to pause a program and wait for a keyboard input to continue. However, it seems to be frowned on by many veteran programmers as something that should not be done in varying degrees. Some people say it is fine to use. Some say it is only to be used when you are locked in your room and no one is watching. Some say that they will personally come to your house and kill you if you use it. I, myself am a new programmer with no formal programming training. I use it because I was taught to use it. What I don't understand is that if it is not something to be used, then why was I taught to use it? Or, on the flip side, is it really not that bad after all? What are your thoughts on this subject?

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• Plotting a cumulative graph of python datetimes

  - by ventolin

  Say I have a list of datetimes, and we know each datetime to be the recorded time of an event happening. Is it possible in matplotlib to graph the frequency of this event occuring over time, showing this data in a cumulative graph (so that each point is greater or equal to all of the points that went before it), without preprocessing this list? (e.g. passing datetime objects directly to some wonderful matplotlib function) Or do I need to turn this list of datetimes into a list of dictionary items, such as: {"year": 1998, "month": 12, "date": 15, "events": 92} and then generate a graph from this list? Sorry if this seems like a silly question - I'm not all too familiar with matplotlib, and would like to save myself the effort of doing this the latter way if matplotlib can already deal with datetime objects itself.

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• Access to a single pixel in C#

  - by Malki

  Hello, I'm working on a school project right now. It's meant to be a 3D editing software, (like a very minimized version of Maya). I have to write it in C#, using the 'Windows Application Project'. I intend to implement all the 3D stuff myself, from projections to shading. My question is, how can I get direct access to a single pixel in the C# windows application? I know I'm going to have a main view port in the window. But I haven't decided yet how it will be made. Is there a built in object that I can use, that will let me define the boundaries of the view port, and then paint each pixel individually? (I'm just shooting in the dark here, I don't know much about C#. I mostly program in C) Thanks, Malki.

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