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• How to setup a http(s) proxy with record/replay functionality?

  - by superb

  The use case is: I want to do some android app performance tests and I want to fix the data when app got from web. The solution I come up with is to setup a local http proxy, which can first record all http traffic, and later replay then app is running perf tests. I found http://mitmproxy.org/, which has exactly the features I want. but seems with the default settings it cannot be used as a https proxy. I tried using it as proxy and login to facebook but doesn't work. I am not familiar with the https protocol and how cert things work. Any one can provide some help? Thanks a lot.

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• Next Identity Key LINQ + SQL Server

  - by user569347

  To represent our course tree structure in our Linq Dataclasses we have 2 columns that could potentially be the same as the PK. My problem is that if I want to Insert a new record and populate 2 other columns with the PK that was generated there is no way I can get the next identity and stop conflict with other administrators who might be doing the same insert at the same time. Case: A Leaf node has right_id and left_id = itself (prereq_id) **dbo.pre_req:** prereq_id left_id right_id op_id course_id is_head is_coreq is_enforced parent_course_id and I basically want to do this: pre_req rec = new pre_req { left_id = prereq_id, right_id = prereq_id, op_id = 3, course_id = query.course_id, is_head = true, is_coreq = false, parent_course_id = curCourse.course_id }; db.courses.InsertOnSubmit(rec); try { db.SubmitChanges(); } Any way to solve my dilemma? Thanks!

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• Is it possible to supply template parameters when calling operator()?

  - by Paul

  I'd like to use a template operator() but am not sure if it's possible. Here is a simple test case that won't compile. Is there something wrong with my syntax, or is this simply not possible? struct A { template<typename T> void f() { } template<typename T> void operator()() { } }; int main() { A a; a.f<int>(); // This compiles. a.operator()<int>(); // This compiles. a<int>(); // This won't compile. return 0; }

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• Sorting a listview (Win32/C++)

  - by Zenox

  I'm trying to sort a listview when the user clicks on the column header. I am catching the LVN_COLUMNCLICK notification like so: case LVN_COLUMNCLICK: { NMLISTVIEW* pListView = (NMLISTVIEW*)lParam; BOOL test = ListView_SortItems ( m_hDuplicateObjectsList, ListViewCompareProc, pListView->iSubItem ); break; } However it seems to fail. My test variable is FALSE and my ListViewCompareProc never gets hit (it has a simple return 1 while I am trying to hit a debug point inside of it). Is there something I am missing for sorting a listview?

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• Understanding memory leak in Android app.

  - by sat

  After going through few articles about performance, Not able to get this statement exactly. "When a Drawable is attached to a view, the view is set as a callback on the drawable" Soln: "Setting the stored drawables’ callbacks to null when the activity is destroyed." What does that mean, e.g. In my app , I initialize an imageButton in onCreate() like this, imgButton= (ImageButton) findViewById(R.id.imagebtn); At later stage, I get an image from an url, get the stream and convert that to drawable, and set image btn like this, imgButton.setImageDrawable(drawable); According to the above statement, when I am exiting my app, say in onDestroy() I have to set stored drawables’ callbacks to null, not able to understand this part ! In this simple case what I have to set as null ? I am using Android 2.2 Froyo, whether this technique is required, or not necessary.

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• couchdb: one database per account vs all in one database w. a namespace / property

  - by thruflo

  I'm modelling a document generation system in couchdb. It semi-automates the production of proposal and presentation documents from managable document fragments. Much like, say, Basecamp, it breaks down very simply into self-contained data per 'account'. Each account has multiple users, projects, documents, etc. However, nothing should be shared between accounts. I can see two ways of doing this: one couchdb database per account use a namespace / property to identify the account It seems to me that the first approach is conceptually sound and potentially has security and partitioning advantages. However, it seems to me to restrict some cross-database data querying (that I don't have a use case for now but you never know...) and to make updating views potentially require an awful lot of writes. Does anyone experienced with this kind of decision have any advice?

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• Error message: "$(window).width is not a function"

  - by Crippletoe

  Hi all, i am trying to use a jQuery scrollbar called "Jscrollhorizontalpane". when i am trying to use it i get the following error message: "$(window).width is not a function" in firebug's console. i am new to jQuery do this might be very basic but still, i dont know what that means and why there is a problem. the scroller comes in a bundle with a few files, one of which is called "jScrollHorizontalPane.js" and i believe it holds the code for the scroller. i tried replacing $ signs there with the word "jQuery" (in case there is a conflict) but it didnt seem to help. also important to add that on the same page i am using another jQuery scroller (a vertical one as opposed to the horizontal on mentioned above) which works just fine and when i examined it's .js file, i could spot lines with "$(window).width". any ideas?

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• Jquery adding events

  - by JBone

  I want to add an event handler to some dynamically added elements. I simplified my problem into the basic code below. I am using the new JQuery 1.7 on feature to say "hey for all labels in the CancelSurvey id element call this notify function when they are clicked." function notify(event) { console.log(event.data.name); } $('#CancelSurvey').on('click', 'label', { name: $(this).attr("id") }, notify); I want to pass the id of the label as parameter "name". When I try to alert this it is undefined (they are defined in the html created). I believe that using the $(this) is not referencing the label selector in this case. It actually seems to be referencing the document itself. Any ideas on how to accomplish this?

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• Creating a button on a View from a second View

  - by BigJoke

  Hi, I have this app I'm working on, which on a second view asks (textfield) the name for a button to be created on first view. After specifying the name and pressing OK button, the first view pops up (as demanded) but there's no new button, although created indeed. Can I use the following code in a second view method, to "refresh" the first view before presenting itself. What's wrong with this code? Any other approach? Thank you. -(void)initWithView:(View1Controller *)aSuperview { theSuperview = aSuperview; } - (IBAction)itemNameButton { ... CGRect rectang; rectang = CGRectMake(0, 0, 320, 460);// just in case [theSuperview.view setNeedsDisplayInRect:rectang]; ... }

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• Python: What's a correct and good way to implement __hash__()?

  - by random-name

  What's a correct and good way to implement hash()? I am talking about the function that returns a hashcode that is then used to insert objects into hashtables aka dictionaries. As hash() returns an integer and is used for "binning" objects into hashtables I assume that the values of the returned integer should be uniformly distributed for common data (to minimize collisions). What's a good practice to get such values? Are collisions a problem? In my case I have a small class which acts as a container class holding some ints, some floats and a string.

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• JavaScript prototype(ing) question

  - by OneNerd

  Trying to grasp Prototyping in Javascript. Trying to create my own namespace to extend the String object in JavaScript. Here is what I have so far (a snippet): var ns { alert: function() { alert (this); } } String.prototype.$ns = ns; As you can see, I am trying to place what will be a series of functions into the ns namespace. So I can execute a command like this: "hello world".$ns.alert(); But the problem is, the this doesn't seem to reference the text being sent (in this case, "hello world"). What I get is an alert box with the following: [object Object] Not having a full grasp of the object-oriented nature of JavaScript, I am at a loss, but I am guessing I am missing something simple. Does anyone know how to achieve this? Thanks -

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• PotgreSQL 2D array to rows

  - by PostGreSQL newbie

  Hello, I am new to PostgreSQL array's. I am trying to a write a procedure to convert array-into-rows, and wanted following output: alphabet | number ---------+---------- A | 10 B | 10 C | 6 D | 9 E | 3 from following: id | alphabet_series -------+-------------------------------------------------------------------------------------------------- 1 | {{A,10},{B,10},{C,6},{D,9},{E,3},{F,9},{I,10},{J,17},{K,16},{L,17},{M,20},{N,13},{O,19}} I have searched for array-to-rows functions, but they all seems to accept 1-d array. but in this case, it is 2-d array. Any pointers will be appreciated. Many thanks.

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• .htacces to create friendly URLs. Help needed....

  - by Jonathan

  Hi, I'm having a hard time with .htacces. I want to create friendly URLs for a site I'm working on... Basically I want to convert this: http://website.com/index.php?ctrl=pelicula&id=0221889 http://website.com/index.php?ctrl=pelicula&id=0160399&tab=posters Into this: http://website.com/pelicula/0221889/ http://website.com/pelicula/0221889/posters/ In case I need it later I would also want to know how to add the article title to the end of the URL like this (I'm using PHP): http://website.com/pelicula/0221889/the-article-name/ http://website.com/pelicula/0221889/the-article-name/posters/ Note: Stackoverflow method is also good for me, for example the url of this question is: http://stackoverflow.com/questions/3033407/htacces-to-create-friendly-urls-help-needed But you can put anything after the id and it will also work. like this: http://stackoverflow.com/questions/3033407/just-anything-i-want I have used some automatic web tools for creating the .htacces file, but its not working correctly. So I ask for your help. I will also be glad if you can recommend .htacces best practices and recommendations.. Thanks!

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• how to use ByteArrayOutputStream and DataOutputStream simultaneously (Java)

  - by Manuel

  Hi! I'm having quite a problem here, and I think it is because I don't understand very much how I should use the API provided by Java. I need to write an int and a byte[] into a byte[] I thought of using a DataOutputStream to solve the data writing with writeInt(int i) and write(byte[] b), and to be able to put that into a byte array, I should use ByteArrayOutputStream's method toByteArray(). I understand that this classes use the Wrapper pattern, so I had two options: DataOutputStream w = new DataOutputStream(new ByteArrayOutputStream()); or ByteArrayOutputStream w = new ByteArrayOutputStream(new DataOutputStream()); but in both cases, I "loose" a method. in the first case, I can't access the toByteArray method, and in the second, I can't access the writeInt method. How should I use this classes together?

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• Django Project Done and Working. Now What?

  - by Rodrogo

  Hi, I just finished what I would call a small django project and pretty soon it's going live. It's only 6 models but a fairly complex view layer and a lot of records saving and retrieving. Of course, forgetting the obvious huge amount of bugs that will, probably, fill my inbox to the top, what would it be the next step towards a website with best performance. What could be tweaked? I'm using jmeter a lot recently and feel confident that I have a good baseline for future performance comparisons, but the thing is: I'm not sure what is the best start, since I'm a greedy bastard that wants to work the least possible and gather the best results. For instance, should I try an approach towards infrastructure, like a distributed database, or should I go with the code itself and in that case, is there something that specifically results in better performance? In your experience, whats pays off more? Personal anecdotes are welcome, but some fact based opinions are even more. :) Thanks very much.

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• TSQL Prefixing String Literal on Insert - Any Value to This, or Redundant?

  - by SethO

  I just inherited a project that has code similar to the following (rather simple) example: DECLARE @Demo TABLE ( Quantity INT, Symbol NVARCHAR(10) ) INSERT INTO @Demo (Quantity, Symbol) SELECT 127, N'IBM' My interest is with the N before the string literal. I understand that the prefix N is to specify encoding (in this case, Unicode). But since the select is just for inserting into a field that is clearly already Unicode, wouldn't this value be automatically upcast? I've run the code without the N and it appears to work, but am I missing something that the previous programmer intended? Or was the N an oversight on his/her part? I expect behavior similar to when I pass an int to a decimal field (auto-upcast). Can I get rid of those Ns?

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• Display cube when overlapped?

  - by lptrung

  Hi all! I have a problem when run animation with three.j. See example: http://jsfiddle.net/5ywdE/13/ When the green cube is rotated to position of the blue cube, the red cube will be rotated. Question: why is the blue cube displayed while the green blue is in front of it. I want the green cube is displayed in front of the blue cube (like so the red cube is displayed in front of all). Can I set the cube which will be displayed in front of other cube in case of overlapped? What am I doing wrong?? Thanks in advance

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• C# Object Array CopyTo links both arrays' values?

  - by Dutchie432

  Okay, I have what I think is a simple question.. or just a case of me being a C# beginner. I have an array of custom objects (clsScriptItem) that I am populating from a database. Once the items are loaded, I want to back them up to "backup" array so I can revert the information back after changing the main array. However, when I use CopyTo to copy the array and then alter the original array, the backup array is also being altered... I though CopyTo merely copied values + structure from one array to another. private void backupItems() { lastSavedItems = new clsScriptItem[items.Length]; items.CopyTo(lastSavedItems, 0); //items[0].nexts[0] is 2 //lastSavedItems[0].nexts[0] is 2 items[0].nexts[0] = "-1"; //items[0].nexts[0] is -1 //lastSavedItems[0].nexts[0] is also -1 } How do I backup this data without having the two arrays be 'linked'??

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• Ruby on Rails in SpringSource tool suite?

  - by Martin Klosi

  I have been using Grails for some time now, but in school they are making us use Ruby on Rails. I have been trying to find an extension for ruby on rails for STS as there is for Grails, but I have failed. The only thing that comes close is a plugin so i can use ruby code in my Grails app using JRuby. I just want to make sure that a fully integrated extension DOESN'T exist. If that is the case, what would be the graphical IDE way of developing in ruby on rails, the same way one would use STS for Groovy on Grails development? (preferably free :) )

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• Aptana Open Resource Key Binding

  - by yagudaev

  The default keyboard shortcut for open resource in Eclipse is Ctrl+Shift+R. It is also the case in Aptana, but there also seems to be a conflicting key since when clicked it brings up a context menu with 2 options "Run" and "Open Resource". How to I avoid having this context menu pop up? I tried to go to the preferences and look for conflicting key-bindings but I could not find it. I am also not sure what "Run" command is actually bound (I tried searching based on the key combination, that did not seem to have worked).

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• How do you embed a hash into a file recursively?

  - by oasisbob

  Simplest case: You want to make a text file which says "The MD5 hash of this file is FOOBARHASH". How do you embed the hash, knowing that the embedded hash value and the hash of the file are inter-related? eg, Cisco embeds hash values into their IOS images, which can be verified like this: cisco# verify s72033-advipservicesk9_wan-mz.122-33.SXH7.bin Embedded Hash MD5 : D2BB0668310392BAC803BE5A0BCD0C6A Computed Hash MD5 : D2BB0668310392BAC803BE5A0BCD0C6A IIRC, Ubuntu also includes a txt file in the root of their ISOs which have the hash of the entire ISO. Maybe I'm mistaken, but trying to figure out how to do this blows my mind.

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• Handling orientation changes yourself

  - by synic

  From the documentation regarding the android:configChanges='orientation' attribute of the activity tag in the manifest: Note: Using this attribute should be avoided and used only as a last-resort. Please read Handling Runtime Changes for more information about how to properly handle a restart due to a configuration change. Why does it say this? In the case of threads and networking requests via a service API library, a request could be made with a reference to the original Activity, and then an orientation change could occur, leaving the thread pointing to the old Activity. While this can be fixed, it's tedious and ugly compared to just handling the configuration changes yourself. Why should it be avoided?

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• F# equivalent of the C# typeof(IEnumerable<>)

  - by Rune FS

  I have a piece of code where I need to figure out if a given type implements IEnumerable (I don't care about the T) I've tried (t:System.Type in case you wonder) let interfaces = t.GetInterfaces() let enumerbale = interfaces.Any( fun t -> (t.GetGenericTypeDefinition() = typeof<IEnumerable<>>) however that wont compile (the compile don't like the <). I then tried let interfaces = t.GetInterfaces() let enumerbale = interfaces.Any( fun t -> (t.GetGenericTypeDefinition() = typeof<IEnumerable<'a>>) but get's a warning that 'a is constraint to obj. I Don't want to figure out if IEnumerable is implemented but IEnumerabl<. Any one know's the solution and btw feel free to comment on the code above as well. It's my first non-trivial F# program

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• PHP - turning register globals off, what is the best way to go about fixing the code?

  - by user187809

  I am working on a old code base, where programmers assumed that register_globals will always be on. Hence variables are used without $_GET or $_POST prefix, pretty much in every page (the code base is huge, hundreds of scripts). I tried turning it off, but the very first script (login script) goes on an infinite loop. I understand that going through one script at a time, and one line at a time and fixing the variables is probably the only option (adding the prefix $_GET or $_POST as the case may be). Has anyone does this before? How did you go about doing it? Any advice?

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• java virtual machine - how does it allocate resources?

  - by Will

  I am testing the performance of a data streaming system that supports continuous queries. This is how it works: - There is a polling service which sends data to my system. - As data passes into the system, each query evaluates based on a window of the stream at the current time. - The window slides as data passes in. My problem is this, when I add more queries to the system, I should expect the throughput to decrease because it can't cope the data rate. However, I actually observe an increase in throughput. I can't understand why this is the case and I am guessing that it's something to do with the way the JVM allocates CPU, memory etc. Can anyone shed any light to my problem?

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