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• Process every pair in a sequence

  - by Henry Jackson

  I'm looking for a concise way to process every (unordered) pair of elements in a sequence in .NET. I know I can do it with nested foreach loops, but I was looking for something a little more readable. I was imagining something like a modified Any() extension method: IEnumerable<Transaction> transactions = ... if (transactions.AnyPair( (first, second) => first.UniqueID == second.UniqueID)) throw ... Or maybe a foreach-style one: IEnumerable<JigsawPiece> pieces = ... pieces.ForEachPair( (first, second) => { TryFit(first, second); }); This question has been asked for other languages (e.g. see http://stackoverflow.com/questions/942543/operation-on-every-pair-of-element-in-a-list), but I'm looking for a .NET solution.

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• SSH not working through Double NAT

  - by d_inevitable

  I am trying to setup port forwarding for ssh through 2 NATs The first Router translates my internet IP to my outer network (10.1.7.0). In the outer network there's a second Router that does NAT to my inner network (192.168.1.0). The target server is connected to both, the outer network and the inner network. I cannot change the port forwarding options for outer router. It is currently configured to forward the SSH and HTTP port to the router for the inner network. Internet + | v +-----------------+ +------------------+ | Outer Router | | Inner Router | |-----------------| |------------------| | | SSH HTTP | | +----+ +--------------------->| | | | | | | | | | | | | +-------+---------+ +------+---------+-+ | | | | | | | | | | | | | | +------------------+ | SSH | | | | Server | | | | | |------------------| | | | +-----------> |<-------+ | | | | |HTTP (testing) | +------------------+ | | | +------v------------------+ | | Outer Workstation | +-------------------+ | |-------------------------| | Inner Workstation| | | | |-------------------| | | | | |<----------------+ +-------------------------+ | | +-------------------+ When connecting from a outer workstation to the address of the inner router, then both SSH and HTTP work fine. When connecting from the internet to my public ip with HTTP, the connection works fine as well. However SSH just times out. Most likely because the reply is not routed back properly. I suspect its either because of the SSH itself, or because the server is connected to both, the inner and outer network. Any ideas how I could resolve this issue? The routes on the server are currently: ip route show default via 10.1.7.254 dev eth0 metric 100 10.1.7.0/24 dev eth0 proto kernel scope link src 10.1.7.1 192.168.1.0/24 dev eth1 proto kernel scope link src 192.168.1.2 Do I have to change this? If so how?

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• C# Linq: Restructuring object

  - by Ben

  I'd like to take an object like this: SortedList<string, SortedList<int, SortedList<DateTime, double>>> Data and, for a given 'int' value (key of first nested sorted list), restructure it like this: SortedList<DateTime, SortedList<string, double>> or, better yet, this: SortedList<DateTime, double[]> where each 'double[]' has as many elements as there are KeyValue pairs in the SortedList. I'm guessing Linq is the way to go, but can't figure it out. Thanks for any suggestions.

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• nginx codeigniter rewrite: Controller name conflicts with directory

  - by palerdot

  I'm trying out nginx and porting my existing apache configuration to nginx. I have managed to reroute the codeigniter url's successfully, but I'm having a problem with one particular controller whose name coincides with a directory in site root. I managed to make my codeigniter url's work as it did in Apache except that, I have a particular url say http://localhost/hello which coincides with a hello directory in site root. Apache had no problem with this. But nginx routes to this directory instead of the controller. My reroute structure is as follows http://host_name/incoming_url => http://host_name/index.php/incoming_url All the codeigniter files are in site root. My nginx configuration (relevant parts) location / { # First attempt to serve request as file, then # as directory, then fall back to index.html index index.php index.html index.htm; try_files $uri $uri/ /index.php/$request_uri; #apache rewrite rule conversion if (!-e $request_filename){ rewrite ^(.*)/?$ /index.php?/$1 last; } # Uncomment to enable naxsi on this location # include /etc/nginx/naxsi.rules } location ~ \.php.*$ { fastcgi_split_path_info ^(.+\.php)(/.+)$; # NOTE: You should have "cgi.fix_pathinfo = 0;" in php.ini # With php5-cgi alone: fastcgi_pass 127.0.0.1:9000; # With php5-fpm: #fastcgi_pass unix:/var/run/php5-fpm.sock; fastcgi_index index.php; include fastcgi_params; } I'm new to nginx and I need help in figuring out this directory conflict with the Controller name. I figured this configuration from various sources in the web, and any better way of writing my configuration is greatly appreciated.

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• Displaying change of content through parent

  - by Mikhail

  I have DHTML content inside a fieldset. This includes plain html, nested objects (even other fieldsets), and value change of input, select, and textarea objects. I'd like to change the border of the fieldset if the contents have been changed. The following works: $('fieldset[name=qsfs127]').children('input').change(function(){ $(this).parent('fieldset').css({border:'1px solid red'}); }) This handles the input; I can extend it to select and textarea. Questions: How can I do the same for html changes? Can all of this change-tracking be done by comparing current html() to stored one? If yes for (2), will this handle cases of "undo"? Edit: I have a button that ajax-uploads contents, and saves the changes. I then remove the border color

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• IE Print CSS and spanning page breaks

  - by DA

  I've been working on trying to fix an issue with print CSS and IE where things would disappear when printing in landscape mode. It appears the issue is that the element I'm trying to print (a large DIV with content inside it) spans two pages when put into landscape mode. What is happening is when the element spans two pages, the first page is blank, and the second page is printing what would normally be left over from the first page. I think it's related to contained floats: wrapper div floated div1 floated div2 If I set the two nested divs to float: none in the print CSS file, then IE will print them, albeit not in the layout we'd like. Before I spend another hour on this, anyone know what, specifically, is the issue here and if there's a known workaround?

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• Using WiX, how do I change a property of a subfolder of a virtual directory?

  - by Joergen Bech

  I have a hierarchy of Directory elements in a WiX script. I also have a component that creates a virtual directory (using IIS:WebVirtualDir), which points to the root of my Directory hierarchy. How do I change a property (e.g. AnonymousAccess) of a subfolder of the virtual directory, e.g. MyVirtualDir <<< this is the virtual directory root MyVirtualDir\MySubFolder <<< this is the subfolder for which I wish to change a property using WebDirProperties Please note that I do not wish to create a new virtual directory for the subfolder. I only wish to change a few security settings. The current script is too big to post here, but take a look at the WiX tutorial: 5.3 Web Directory. Suppose in that example that there was another Directory element named "MySubFolder" nested within the "InstallDir" element. What would then be the next step in order to set properties for "MySubFolder" without turning it into a virtual directory?

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• Can Somebody Explain this java code

  - by dubbeat

  Hi, I'm just starting out on android and my java is verry rusty. I can't remember ever seeing a function nested in another function like this before. Could somebody explain to me exactly what final does and explain why you would nest a function in another like this? private final Handler handler = new Handler() { @Override public void handleMessage(final Message msg) { Log.v(Constants.LOGTAG, " " + ReviewList.CLASSTAG + " worker thread done, setup ReviewAdapter"); progressDialog.dismiss(); if ((reviews == null) || (reviews.size() == 0)) { empty.setText("No Data"); } else { reviewAdapter = new ReviewAdapter(ReviewList.this, reviews); setListAdapter(reviewAdapter); } } };

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• syntax to express mathematical formula concisely in your language of choice

  - by aaa

  hello. I am developing functional domain specific embedded language within C++ to translate formulas into working code as concisely and accurately as possible. Right now my language looks something like this: // implies two nested loops j=0:N, i=0,j (range(i) < j < N)[T(i,j) = (T(i,j) - T(j,i))/e(i+j)]; // implies summation over above expression sum(range(i) < j < N))[(T(i,j) - T(j,i))/e(i+j)]; I am looking for possible syntax improvements/extensions or just different ideas about expressing mathematical formulas as clearly and precisely as possible. Can you give me some syntax examples relating to my question which can be accomplished in your language of choice which consider useful. In particular, if you have some ideas about how to translate the above code segments, I would be happy to hear them Thank you

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• ViewPager resize height to Content

  - by user1324936

  ViewPager does not wrap its height to its content. For my layout I need to set the hight then dynamically because it is nested in other layouts. Therefore I created a ScrollView as content of the ViewPager and check its height in onCreate method of the Fragment, but the ScrollView has always the same size. How can I resize the ViewPager to fit to its content? final ScrollView sv = (ScrollView) v.findViewById(R.id.sv); ViewTreeObserver vto = scrollViewMenuFragen.getViewTreeObserver(); vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() { @Override public void onGlobalLayout() { int height = sv.getMeasuredHeight(); //always same height independent of content height //need to resize ViewPager ViewGroup.LayoutParams params = (ViewGroup.LayoutParams) mPager.getLayoutParams(); params.height = height; mPager.setLayoutParams(params); } });

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• Configuring nginx to check for hard files in only a few directories,

  - by Evan Carroll

  For a node.js project I'm doing, I have a tree like this. +-- public ¦   +-- components ¦   +-- css ¦   +-- img +-- routes +-- views Essentially, I have the root to be set to public. I want all requests destined to /components/ /css/ /img/ To check to see if their appropriate destinations exist on disk. However, I don't want requests to other directories to even run an IO operation, /foo/asdf /bar /baz/index.html None of those should result in the disk being touched. I have a stansa that does the proxy to node.js, location @proxy { internal; proxy_set_header Host $http_host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header X-NginX-Proxy true; proxy_pass http://localhost:3030; proxy_redirect off; } I just would like to know how to arrange this. My problem would be easily solved if try_files took a single argument, but it always wants a file first. location /components/ { try_files $uri, @proxy } location /css/ { try_files $uri, @proxy } location /img/ { try_files $uri, @proxy } However, there is nothing that I can find that will give me, location / { try_files @proxy } How do I get the effect I want?

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• jQuery: Sorting hierarchical data?

  - by Industrial

  Hi everybody, I have tried for some time to work out a way of sorting nested categories with jQuery. I failed to build my own plugin to do this, so I tried to find something that were available already. Tried a few hours now with this one, http://www.jordivila.net/code/js/jquery/ui-widgetTreeList_inheritance/widgetTreeListSample.aspx and cant get it to work. What are the alternatives of creating a jQuery / jQuery UI script that handles sorting children and parent categories in a way that can be combined with a AJAX PHP backend to handle the actual sorting in the database? Thanks!

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• Architecture of a single-page JavaScript web application?

  - by fig-gnuton

  How should a complex single-page JS web application be structured on the client-side? Specifically I'm curious about how to cleanly structure the application in terms of its model objects, UI components, any controllers, and objects handling server persistence. MVC seemed like a fit at first. But with UI components nested at various depths (each with their own way of acting on/reacting to model data, and each generating events which they themselves may or may not handle directly), it doesn't seem like MVC can be cleanly applied. (But please correct me if that's not the case.) -- (This question resulted in two suggestions of using ajax, which is obviously needed for anything other than the most trivial one-page app.)

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• LuaInterface: add a table to the script scope

  - by user93422

  Question: how can I insert a table from C# into 'LuaInterface' script scope using a C# object (preferably anonymous type)? /// I want to do this, but it does not work /// (complains that 'test' is userdata and not table /// when I pass it to pairs() in the script) //lua["test"] = new { A = 1, B = 2 }; /// another option /// but building this string is a PITA (actual string is nested and long). lua.DoString("test = { A = 1, B = 2 }"); // So I have to do this lua.NewTable("test"); ((LuaTable) lua["test"])["A"] = 1; ((LuaTable) lua["test"])["B"] = 2; lua.DoString("for k,v in pairs(test) do print(k..': '..v) end");

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• C optimization breaks algorithm

  - by Halpo

  I am programming an algorithm that contains 4 nested for loops. The problem is at at each level a pointer is updated. The innermost loop only uses 1 of the pointers. The algorithm does a complicated count. When I include a debugging statement that logs the combination of the indexes and the results of the count I get the correct answer. When the debugging statement is omitted, the count is incorrect. The program is compiled with the -O3 option on gcc. Why would this happen?

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• Python - from file to data structure?

  - by Seafoid

  Hi, I have large file comprising ~100,000 lines. Each line corresponds to a cluster and each entry within each line is a reference i.d. for another file (protein structure in this case), e.g. 1hgn 1dju 3nmj 8kfn 9opu 7gfb 4bui I need to read in the file as a list of lists where each line is a sublist, thus preserving the integrity of the cluster, e.g. nested_list = [['1hgn', '1dju', '3nmj', '8kfn'], ['9opu', '7gfb'], ['4bui']] My current code creates a nested list but the entries within each list are a single string and not comma separated. Therefore, I cannot splice the list with indices so easily. Any help greatly appreciated. Thanks, S :-)

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• android: ListView.setAdapter() is causing IllegalStateException. Not sure how to fix it.

  - by Stev0

  I'm trying to populate a listview with the contents of various ListAdapters based upon the results of a switch statement nested in an OnItemClickListener. When clicking the item, the application was force closing, so I ran it through the dev tools and android debugger. Eclipse is showing me the in the main thread that the application has suspended due an IllegalStateException. I have a marginal understanding of what the particular exception indicates, but not sure how to fix it, or what in my code is causing it to be thrown. Code as follows: final ListView lv = (ListView) findViewById(R.id.main_list); final String[] autos = getResources().getStringArray(R.array.auto_array); final ListAdapter la_auto = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_2, autos); And then further down in the portion dealing with the onclicklistener gallery.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView parent, View v, int position, long id) { switch(gallery.getSelectedItemPosition()) { case 0: lv.setAdapter(la_auto); break;

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• Should the spacing between parent and child containers belong to parent or child?

  - by johntrepreneur

  I'm struggling to determine where in my CSS the padding/margins should go to keep seperation between parent and child containers. For example, if you have have a parent div with two nested children and you need to have even 10px spacing between the children and also have the children be spaced 10 px from the parent; then would you add padding to parent div {padding:10px} and then just add 10px of margin between the children? Or would you leave the parent at 0 padding and have the children define what seperation they need from each other and also their parents?

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• Windows 7 Explorer: how to show total size of all files in current folder?

  - by matt wilkie

  In Windows XP Explorer one can turn on Status Bar which shows, among other things, the total size of all the files in the current folder, or if the cumulative size of the selected files. How do I get the same at-a-glance information in Windows 7? Selecting files doesn't count as it stops after 15 files, and it's rare that I'm concerned about total size with that few files (it's pretty easy to estimate in my head). thanks. UPDATE: Information derived from the context menu (select r-click properties) isn't "at a glance", and not as smooth as selecting files and clicking the details link at the bottom in any case. Thank you for fleshing out more of the available routes though. Yes Q19232 is similar to this one, though it is not a duplicate. That question is about looking for easy free-space on disk stats and this one is easy used-space by contents of this folder stats. The answer for both is the same though. You can't! Hopefully someone will figure how to get this lost feature back with a shell extension or something.

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• Locked out of our Comcast Business Gateway for seemingly no reason

  - by Tyler

  A little backstory... Last fall we migrated our ISP from AT&T to Comcast at one of our offices. At that time, we received a new modem/router from Comcast and we configured everything to our liking. We've never really had very many issues with the router aside from having to restart it every once in a while. Here's the problem... About three months ago I changed the password on the router from the default. After that, I logged into the router several times to make changes with no issue. During May I logged into the router to add two new static routes, no problems. A week ago, I tried to log into the router and could not. I tried the non-default password that I changed it to, the default, anything and everything I could think of and no luck. I restarted the router on Monday thinking it may just be locked up, but after the restart it would still not let me log in. This router is at our other office about 2 hours from here and I want to avoid having to drive down there and reset to factory defaults, reconfigure, etc. Any ideas?

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• displaying labels in marathi language.

  - by vaishali

  i am tring to display lable of form in marathi language for that am creating marathi.js this my mararhi.js if(Ext.app.formPanel) { Ext.apply(Ext.app.formPanel.prototype, { selectUser:'???' } ); } and my other js file contain this var Ext.app.formPanel = Ext.extend(Ext.form.FormPanel,{ selectUser:'Select User', initComponent : function(config) { Ext.apply(this, { title : 'User Rights', bodyStyle : 'padding: 10px; background-color: #DFE8F6', labelWidth : 100, width : 755, id : 'formUserRights', renderTo:'adminpanel', items : [ id: 'User', fieldLabel:this.selectUser, width:200 ] //items }//Ext.apply );//Ext.apply Ext.app.formPanel.superclass.initComponent.apply(this, arguments); }//init component }); //yuyu ...... .... but it can not work it gives error ;missing before var Ext.app.formPanel = Ext.extend..... but when i checked all carefully every thing is correctly nested.

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• Configure New Server for .htaccess

  - by Phil T

  I have a new LAMP CENTOS 5 server I am setting up and trying to copy the configuration from another web server I have. I am stuck with what I think is a mod_rewrite problem. If I go to http://old-server.com/any_page_name.php it correctly routes through some handling code in index.php and shows me a graceful "Page Cannot Be Displayed" message. But if I go to http://new-server.com/any_page_name.php I get an ugly Apache 404 Not Found error message. I looked in both httpd.conf files and they both have only one reference to mod_rewrite. LoadModule rewrite_module modules/mod_rewrite.so So it seems like that should be fine. At the bottom of httpd.conf I have the code: <VirtualHost *:80> ServerAdmin [email protected] DocumentRoot /var/www/html ServerName new-server.com ErrorLog logs/new-server.com-error_log CustomLog logs/new-server.com-access_log common </VirtualHost> Then in the root of /var/www/html I have the exact same .htaccess file that looks like this: RewriteEngine on Options +FollowSymlinks RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . index.php [L] ErrorDocument 404 /page-unavailable/ <files ~ "\.tpl$"> order deny,allow allow from none deny from all </files> So I don't see why the page load at old-server.com works fine while new-server.com doesn't route through index.php like I want it to do. Thanks.

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• Server not resolving after restart

  - by DomainSoil

  I restarted our server today, and now cannot for the life of me get anything to resolve... I suspect it has something to do with our routes. I've tried numerous Google results to no avail. Here is as far as I've gotten: [root@www ~]# route -n Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.1.101 0.0.0.0 255.255.255.255 UH 0 0 0 eth1 0.0.0.0 192.168.1.101 0.0.0.0 UG 0 0 0 eth1 Things you need to know: Our server (CentOS 6.3) runs two virtual machines, one live, and one development. They mirror each other as much as possible, but I can't find where I've went wrong with the live server. The dev server works fine. [root@www ~]# ifconfig eth1 Link encap:Ethernet HWaddr xx:xx:xx:xx:xx:xx inet6 addr: xxxx:xxx:xxxx:xxxx:xxxx/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:118206 errors:0 dropped:0 overruns:0 frame:0 TX packets:165 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:7825749 (7.4 Mib) TX bytes:7146 (69.2 KiB) Interrupt:28 [root@www ~]# /etc/init.d/network status Configured devices: lo Auto eth0 Currently active devices: lo eth1 If there is any other information you need, please don't hesitate to ask!

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• Why do I have redundant routing in Windows 7?

  - by Mark

  I'm trying to better understand my routing tables. My routing table is: IPv4 Route Table =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 1. 0.0.0.0 0.0.0.0 192.168.1.1 192.168.1.151 25 2. 127.0.0.0 255.0.0.0 On-link 127.0.0.1 306 3. 127.0.0.1 255.255.255.255 On-link 127.0.0.1 306 4. 127.255.255.255 255.255.255.255 On-link 127.0.0.1 306 5. 192.168.1.0 255.255.255.0 On-link 192.168.1.151 281 6. 192.168.1.151 255.255.255.255 On-link 192.168.1.151 281 7. 192.168.1.255 255.255.255.255 On-link 192.168.1.151 281 8. 224.0.0.0 240.0.0.0 On-link 127.0.0.1 306 9. 224.0.0.0 240.0.0.0 On-link 192.168.1.151 281 10. 255.255.255.255 255.255.255.255 On-link 127.0.0.1 306 11. 255.255.255.255 255.255.255.255 On-link 192.168.1.151 281 =========================================================================== Most of those entries make sense to me, but a few confuse me: 2 and 3 seem redundant, as do 2 and 4. Why not just 2? 5 and 6 seem redundant, as do 5 and 7. Why not just 5? I'm trying to grok routing tables and this bit is still confusing me.

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• Hibernate deletion issue

  - by muffytyrone

  I'm trying to write a Java app that imports a data file. The process is as follows Create Transaction Delete all rows from datatable Load data file into datatable Commit OR Rollback if any errors were encountered. The data loaded in step 3 is mostly the same as the data deleted in step3. The deletion is performed using the following DetachedCriteria criteria = DetachedCriteria.forClass(myObject.class); List<myObject> myObjects = hibernateTemplate.findByCriteria(criteria); hibernateTemplate.deleteAll(myObjects); When I then load the datafile, i get the following exception nested exception is org.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session: The whole process needs to take place in transaction. And I don't really want to have to compare the import file / data table and then perform an insert/update/delete to get them into sync. Any help would be appreciated.

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