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  • Linked list recursive reverse

    - by Phoenix
    I was looking at the code below from stanford library: void recursiveReverse(struct node** head_ref) { struct node* first; struct node* rest; /* empty list */ if (*head_ref == NULL) return; /* suppose first = {1, 2, 3}, rest = {2, 3} */ first = *head_ref; rest = first->next; /* List has only one node */ if (rest == NULL) return; /* put the first element on the end of the list */ recursiveReverse(&rest); first->next->next = first; /* tricky step -- see the diagram */ first->next = NULL; /* fix the head pointer */ *head_ref = rest; } What I don't understand is in the last recursive step for e.g if list is 1-2-3-4 Now for the last recursive step first will be 1 and rest will be 2. So if you set *head_ref = rest .. that makes the head of the list 2 ?? Can someone please explain how after reversing the head of the list becomes 4 ??

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  • How to reverse items in WPF Datagrid?

    - by irf1x
    If i have DataGrid which looks like: Col 1 Col 2 ------- ------- 1 a 2 b 3 c ... ... n n Can the order be reversed easily without sorting? So that n is first, and 1 is last. I have custom sort implemented from this article, but sorting the same column twice in a row calls sorting function twice (which is slow), so just reversing the order should be faster and have the same effect.

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  • @SequenceGenerator - allocationSize, reverse engineering with Eclipse Hibernate Tools

    - by Spooky
    I use the Eclipse Hibernate Tools to create domain classes with JPA annotations from my Oracle database. To control sequence generation I have added the following entry to the hibernate.reveng.xml: ... <primary-key> <generator class="sequence"> <param name="sequence">SEQ_FOO_ID</param> </generator> </primary-key> ... This results in the following annotation: @SequenceGenerator(name = "generator", sequenceName = "SEQ_FOO_ID") However I need to set the "allocationSize" like this: @SequenceGenerator(name = "generator", sequenceName = "SEQ_FOO_ID", allocationSize = 1) Is it possible to set this somehow in the hibernate.reveng.xml?

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  • INI file reverse engineering

    - by Akshar Prabhu Desai
    I am maintaining a legacy application which prints product labels on packaging. The format of the label is stored in a INI file. I wanted to know if anyone has any hints about the meaning of this format. I have pasted a snippet here. {D1531,1000,1501|} {C|} {U2;0130|} {D1531,1000,1501|} {AX;+000,+000,+00|} {AY;+05,0|} {PC000;0922,0555,15,15,H,11,B|} {RC00;<FE/>LABELTITLE</FE>|} {PC001;0865,0555,15,15,H,11,B|} {RC01;<FE/>CURRENT</FE>|} {PC002;0796,0040,10,10,H,11,B|}

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  • Reverse proxy for Tomcat

    - by aauser
    I got following infrastructure. Site A - Tomcat. Can be access by url www.sitea.com Site B - php backend( or probably it will be just static html pages ). Can't be access directly. I want to forward all request comming to www.sitea.com/doforward/... (Tomcat) to php backend. And all other requests with other urls should be handled by Tomcat itself. I know i can add another web server in front of tomcat, for example nginx, and based on url forward request to php backed or tomcat backend. But i want tomcat to serve requests itself and forward it to another backend. Probably there are ready implementations for servlet containers like mod_proxy for apache. Thank you

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  • Reverse engineering a custom data file

    - by kerchingo
    At my place of work we have a legacy document management system that for various reasons is now unsupported by the developers. I have been asked to look into extracting the documents contained in this system to eventually be imported into a new 3rd party system. From tracing and process monitoring I have determined that the document images (mainly tiff files) are stored in a number of 1.5GB files. These files seem to be read from a specific offset and then written to a tmp file that is then served via a web app to the client, and then deleted. I guess I am looking for suggestions as to how I can inspect these large files that contain the tiff images, and eventually extract and write them to individual files.

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  • Reverse engineering and redistributing code from .NET Framework

    - by ToxicAvenger
    Once or twice I have been running into the following issue: Classes I want to reuse in my applications (and possibly redistribute) exist in the .NET Framework assemblies, but are marked internal or private. So it is impossible to reuse them directly. One way is to disassemble them, pick the pieces you need, put them in a different namespace, recompile (this can be some effort, but usually works quite well). My question is: Is this legal? Is this only legal for the classes of the Framework which are available as source code anyway? Is it illegal? I think that Microsoft marks them internal or private primarily so that they don't have to support them or can change the interfaces later. But some pieces - be it SharePoint or WCF - are almost impossible to properly extend by only using public classes from the apis. And rewriting everything from scratch generates a huge amount of effort, before you even start solving the problem you intended to solve. This is in my eyes not a "dirty" approach per se. The classes Microsoft ships are obviously well tested, if I reuse them under a different namespace I have "control" over them. If Microsoft changes the original implementation, my code won't be affected (some internals in WCF changed quite a bit with v4). It is not a super-clean approach. I would much prefer Microsoft making several classes public, because there are some nice classes hidden inside the framework.

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  • How do I construct a Django reverse/url using query args?

    - by Andrew Dalke
    I have URLs like http://example.com/depict?smiles=CO&width=200&height=200 (and with several other optional arguments) My urls.py contains: urlpatterns = patterns('', (r'^$', 'cansmi.index'), (r'^cansmi$', 'cansmi.cansmi'), url(r'^depict$', cyclops.django.depict, name="cyclops-depict"), I can go to that URL and get the 200x200 PNG that was constructed, so I know that part works. In my template from the "cansmi.cansmi" response I want to construct a URL for the named template "cyclops-depict" given some query parameters. I thought I could do {% url cyclops-depict smiles=input_smiles width=200 height=200 %} where "input_smiles" is an input to the template via a form submission. In this case it's the string "CO" and I thought it would create a URL like the one at top. This template fails with a TemplateSyntaxError: Caught an exception while rendering: Reverse for 'cyclops-depict' with arguments '()' and keyword arguments '{'smiles': u'CO', 'height': 200, 'width': 200}' not found. This is a rather common error message both here on StackOverflow and elsewhere. In every case I found, people were using them with parameters in the URL path regexp, which is not the case I have where the parameters go into the query. That means I'm doing it wrong. How do I do it right? That is, I want to construct the full URL, including path and query parameters, using something in the template. For reference, % python manage.py shell Python 2.6.1 (r261:67515, Feb 11 2010, 00:51:29) [GCC 4.2.1 (Apple Inc. build 5646)] on darwin Type "help", "copyright", "credits" or "license" for more information. (InteractiveConsole) >>> from django.core.urlresolvers import reverse >>> reverse("cyclops-depict", kwargs=dict()) '/depict' >>> reverse("cyclops-depict", kwargs=dict(smiles="CO")) Traceback (most recent call last): File "<console>", line 1, in <module> File "/Library/Python/2.6/site-packages/django/core/urlresolvers.py", line 356, in reverse *args, **kwargs))) File "/Library/Python/2.6/site-packages/django/core/urlresolvers.py", line 302, in reverse "arguments '%s' not found." % (lookup_view_s, args, kwargs)) NoReverseMatch: Reverse for 'cyclops-depict' with arguments '()' and keyword arguments '{'smiles': 'CO'}' not found.

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  • Subaru Starts Thinking about their Path to Fusion Applications

    Brian Simmermon, VP and CIO, Subaru of America, and a member of Oracle's Fusion Strategy Council explains how Subaru is aligning their business and IT strategy to improve sales through Siebel and EBS, and is looking at implementing Fusion Technologies such as BPEL, AIA and Enterprise Manager to begin their evolutionary path to Fusion.

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  • Nginx and Google Appengine Reverse Proxy Security

    - by jmq
    The scenario is that I have a Google compute node running Nginx as a reverse proxy to the google appengine. The appengine is used to service REST calls from an single page application (SPA). HTTPS is used to the Nginx front end from the Internet. Do I also need to make the traffic from the Nginx reverse proxy to the appengine secure by turning on HTTPS on the appengine? I would like to avoid the overhead of HTTPS between the proxy and the backend. My thinking was that once the traffic has arrived at Nginx encrypted, decrypted in Nginx, and then sent via the reverse proxy inside of Google's infrastructure it would be secure. Is it safe in this case to not use HTTPS?

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  • so, my Cassandra consultant left me and now I'm thinking about reverting to mysql

    - by sathia
    I run a middle size community and some time ago I started to develop social capabilities such as follow, status update, wall etc. For some reason i thought that Cassandra was the right tool for the job so I looked online for a Cassandra developer and I found a very talented one. Unluckily in the midst of the development the dev left (too much jobs) and so I'm here with a very nice class, a very nice demo, but a lot of fears that I won't be able to handle basic things such as compaction, scaling etc. My biggest fear is to go online with all this coolness and then having a site inaccessible for hours or days. The mysql consultant (very talented too) keeps saying me that I should stick with Mysql which I know rather well and in case something's wrong we can manage. In that case I should take the class made for cassandra and abstract it for Mysql. My question is this: Should I find another dev/consultant and stick with Cassandra because for social things it is definitely the best tool for the job, or should I listen to the Mysql consultant and revert to Mysql? About 15k login each day Average 20 actions per user Avg 6 followers x user (These are current statistics, but of course I'd like to increase them as much as possible.)

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  • Thinking in DAX (#powerpivot and #bism)

    - by Marco Russo (SQLBI)
    Last week Alberto published an interesting post about Counting Products in the Current Status with PowerPivot . Starting from a question raised from a reader, Alberto described how to solve a common issue (let me know the “current status” of each item at a given point in time starting from a transactions table) by using a single DAX formula. I suggest you to read his post to understand the technical details of that. What is inspiring of this example is that we can look at Vertipaq and DAX from several...(read more)

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  • Thinking differently about BI delivery

    - by jamiet
    My day job involves implementing Business Intelligence (BI) solutions which, as I have said before, is simply about giving people the information they need to do their jobs. I’m always interested in learning about new ways of achieving that aim and that is my motivation for writing blog entries that are not concerned with SQL or SQL Server per se. Implementing BI systems usually involves hacking together a bunch third party products with some in-house “glue” and delivering information using some shiny, expensive web-based front-end tool; the list of vendors that supply such tools is big and ever-growing. No doubt these tools have their place and of late I have started to wonder whether they can be supplemented with different ways of delivering information. The problem I have with these separate web-based tools is exactly that – they are separate web-based tools. What’s the problem with that you might ask? I’ll explain! They force the information worker to go somewhere unfamiliar in order to get the information they need to do their jobs. Would it not be better if we could deliver information into the tools that those information workers are already using and not force them to go somewhere else? I look at the rise of blogging over recent years and I realise that what made them popular is that people can subscribe to RSS feeds and have information pushed to them in their tool of choice rather than them having to go and find the information for themselves in a tool that has been foisted upon them. Would it not be a good idea to adopt the principle of subscription for the benefit of delivering BI information as well? I think it would and in the rest of this blog entry I’ll outline such a scenario where the power of subscription could be used to enhance the delivery of information to information workers. Typical questions that information workers ask might be: What are my year-on-year sales figures? What was my footfall yesterday? How many widgets have I sold so far today? Each of those questions includes a time element and that shouldn’t surprise us, any BI system that I have worked on includes the dimension of time. Now, what do people use to view and organise their time-oriented information? Its not a trick question, they use a calendar and in the enterprise space more often than not that calendar is managed using Outlook. Given then that information workers are already looking at their calendar in Outlook anyway would it not make sense then to deliver information into that same calendar? Of course it would. Calendars are a great way of visualising information such as sales figures. Observe: Just in this single screenshot I have managed to convey a multitude of information. The information worker can see, at a glance, information about hourly/daily/weekly/monthly sales and, moreover, he/she is viewing that information right inside the tool that they use every day. There is no effort on the part of him/her, the information just appears hour after hour, day after day. Taking the idea further, each one of those calendar items could be a mini-dashboard in its own right. Double-clicking on an item could show a plethora of other information about that time slot such as breaking the sales down per region or year-over-year comparisons. Perhaps the title could employ a sparkline? Loads of possibilities. The point is that calendars are a completely natural way to visualise information; we should make more use of them! The real beauty of delivering information using calendars for us BI developers is that it should be so easy. In the case of Outlook we don’t need to write complicated VBA code that can go and manipulate a person’s calendar, simply publishing data in a format that Outlook can understand is sufficient and happily such formats already exist; iCalendar is the accepted format and the even more flexible xCalendar is hopefully on its way as well.   I’d like to make one last point and this one is with my SQL Server hat on. Reporting Services 2008 R2 introduced the ability to publish data as subscribable Atom feeds so it seems logical that it could also be a vehicle for delivering calendar feeds too. If you think this would be a good idea go and vote for it at Publish data as iCalendar feeds and please please please add some comments (especially if you vote it down). Work smarter, not harder! @Jamiet Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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  • Thinking Local, Regional and Global

    - by Apeksha Singh-Oracle
    The FIFA World Cup tournament is the biggest single-sport competition: it’s watched by about 1 billion people around the world. Every four years each national team’s manager is challenged to pull together a group players who ply their trade across the globe. For example, of the 23 members of Brazil’s national team, only four actually play for Brazilian teams, and the rest play in England, France, Germany, Spain, Italy and Ukraine. Each country’s national league, each team and each coach has a unique style. Getting all these “localized” players to work together successfully as one unit is no easy feat. In addition to $35 million in prize money, much is at stake – not least national pride and global bragging rights until the next World Cup in four years time. Achieving economic integration in the ASEAN region by 2015 is a bit like trying to create the next World Cup champion by 2018. The team comprises Brunei Darussalam, Cambodia, Indonesia, Lao PDR, Malaysia, Myanmar, Philippines, Singapore, Thailand and Vietnam. All have different languages, currencies, cultures and customs, rules and regulations. But if they can pull together as one unit, the opportunity is not only great for business and the economy, but it’s also a source of regional pride. BCG expects by 2020 the number of firms headquartered in Asia with revenue exceeding $1 billion will double to more than 5,000. Their trade in the region and with the world is forecast to increase to 37% of an estimated $37 trillion of global commerce by 2020 from 30% in 2010. Banks offering transactional banking services to the emerging market place need to prepare to repond to customer needs across the spectrum – MSMEs, SMEs, corporates and multi national corporations. Customers want innovative, differentiated, value added products and services that provide: • Pan regional operational independence while enabling single source of truth at a regional level • Regional connectivity and Cash & Liquidity  optimization • Enabling Consistent experience for their customers  by offering standardized products & services across all ASEAN countries • Multi-channel & self service capabilities / access to real-time information on liquidity and cash flows • Convergence of cash management with supply chain and trade finance While enabling the above to meet customer demands, the need for a comprehensive and robust credit management solution for effective regional banking operations is a must to manage risk. According to BCG, Asia-Pacific wholesale transaction-banking revenues are expected to triple to $139 billion by 2022 from $46 billion in 2012. To take advantage of the trend, banks will have to manage and maximize their own growth opportunities, compete on a broader scale, manage the complexity within the region and increase efficiency. They’ll also have to choose the right operating model and regional IT platform to offer: • Account Services • Cash & Liquidity Management • Trade Services & Supply Chain Financing • Payments • Securities services • Credit and Lending • Treasury services The core platform should be able to balance global needs and local nuances. Certain functions need to be performed at a regional level, while others need to be performed on a country level. Financial reporting and regulatory compliance are a case in point. The ASEAN Economic Community is in the final lap of its preparations for the ultimate challenge: becoming a formidable team in the global league. Meanwhile, transaction banks are designing their own hat trick: implementing a world-class IT platform, positioning themselves to repond to customer needs and establishing a foundation for revenue generation for years to come. Anand Ramachandran Senior Director, Global Banking Solutions Practice Oracle Financial Services Global Business Unit

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  • Take,Skip and Reverse Operator in Linq

    - by Jalpesh P. Vadgama
    I have found three more new operators in Linq which is use full in day to day programming stuff. Take,Skip and Reverse. Here are explanation of operators how it works. Take Operator: Take operator will return first N number of element from entities. Skip Operator: Skip operator will skip N number of element from entities and then return remaining elements as a result. Reverse Operator: As name suggest it will reverse order of elements of entities. Here is the examples of operators where i have taken simple string array to demonstrate that. C#, using GeSHi 1.0.8.6 using System; using System.Collections.Generic; using System.Linq; using System.Text;     namespace ConsoleApplication1 {     class Program     {         static void Main(string[] args)         {             string[] a = { "a", "b", "c", "d" };                           Console.WriteLine("Take Example");             var TkResult = a.Take(2);             foreach (string s in TkResult)             {                 Console.WriteLine(s);             }               Console.WriteLine("Skip Example");             var SkResult = a.Skip(2);             foreach (string s in SkResult)             {                 Console.WriteLine(s);             }               Console.WriteLine("Reverse Example");             var RvResult = a.Reverse();             foreach (string s in RvResult)             {                 Console.WriteLine(s);             }                       }     } } Parsed in 0.020 seconds at 44.65 KB/s Here is the output as expected. hope this will help you.. Technorati Tags: Linq,Linq-To-Sql,ASP.NET,C#.NET

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  • Failed reverse DNS and SPF only when using Thunderbird!

    - by TruMan1
    I have a reverse DNS and SPF records correctly setup for my mail server. Sending webmail from it works perfect. The problem is when Thunderbird sends out emails, it is using the client's IP address for the hostname. I have SMTP authentication and specified my mail server's as the outgoing SMTP. Mail is being sent, but it is not "signing" the email with the mail server's IP address.. it is using the client's. Is there any way to fix this? This is the spam error I get when sending from Thunderbird: Spam: Reverse DNS Lookup, SPF_SoftFail

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  • b Is it bad to have the Reverse DNS for two IPs point to the same domain name?

    - by Daniel Vandersluis
    I am in the process of setting up a new server for my web application (the site will be moved, it is not for load balancing or the like), which has a different IP address from my existing server. My current server has a reverse DNS PTR record set up pointing its IP to mydomain.com. Is it bad to set up a reverse DNS PTR record for the new IP pointing to mydomain.com as well? Or should I wait until I do my migration to set up the record? Update: I forgot to mention, the A record for the mydomain.com points to the old server's IP address, not the new one, if it matters.

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  • How to rewrite the domain part of Set-Cookie in a nginx reverse proxy?

    - by Tobia
    I have a simple nginx reverse proxy: server { server_name external.domain.com; location / { proxy_pass http://backend.int/; } } The problem is that Set-Cookie response headers contain ;Domain=backend.int, because the backend does not know it is being reverse proxied. How can I make nginx rewrite the content of the Set-Cookie response headers, replacing ;Domain=backend.int with ;Domain=external.domain.com? Passing the Host header unchanged is not an option in this case. Apache httpd has had this feature for a while, see ProxyPassReverseCookieDomain, but I cannot seem to find a way to do the same in nginx.

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  • How to set up Nginx as a caching reverse proxy?

    - by Continuation
    I heard recently that Nginx has added caching to its reverse proxy feature. I looked around but couldn't find much info about it. I want to set up Nginx as a caching reverse proxy in front of Apache/Django: to have Nginx proxy requests for some (but not all) dynamic pages to Apache, then cache the generated pages and serve subsequent requests for those pages from cache. Ideally I'd want to invalidate cache in 2 ways: Set an expiration date on the cached item To explicitly invalidate the cached item. E.g. if my Django backend has updated certain data, I'd want to tell Nginx to invalidate the cache of the affected pages Is it possible to set Nginx to do that? How?

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  • Nginx as a reverse proxy + Apache or completely cut out Apache? (WordPress Multisite)

    - by user715564
    I am starting a WordPress multisite network with domain mapping and I am trying to think through my server set up. Right now, I only have one medium sized VPS but hopefully I will need to add more servers later so ideally the solution will also accommodate future growth. My question is, would it be better to set up Nginx as a reverse proxy with Apache or use only Nginx? It seems like setting up Nginx as a reverse proxy would be easier and offer less of a possibility of problems but, on the other hand, would using only Nginx add substantial benefits?

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  • How to set up Nginx as a caching reverse proxy?

    - by Continuation
    I heard recently that Nginx has added caching to its reverse proxy feature. I looked around but couldn't find much info about it. I want to set up Nginx as a caching reverse proxy in front of Apache/Django: to have Nginx proxy requests for some (but not all) dynamic pages to Apache, then cache the generated pages and serve subsequent requests for those pages from cache. Ideally I'd want to invalidate cache in 2 ways: Set an expiration date on the cached item To explicitly invalidate the cached item. E.g. if my Django backend has updated certain data, I'd want to tell Nginx to invalidate the cache of the affected pages Is it possible to set Nginx to do that? How?

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  • Reverse-engineer SharePoint fields, content types and list instance—Part3

    - by ybbest
    Reverse-engineer SharePoint fields, content types and list instance—Part1 Reverse-engineer SharePoint fields, content types and list instance—Part2 Reverse-engineer SharePoint fields, content types and list instance—Part3 In Part 1 and Part 2 of this series, I demonstrate how to reverse engineer SharePoint fields, content types. In this post I will cover how to include lookup fields in the content type and create list instance using these content types. Firstly, I will cover how to create list instance and bind the custom content type to the custom list. 1. Create a custom list using list Instance item in visual studio and select custom list. 2. In the feature receiver add the Department content type to Department list and remove the item content type. C# AddContentTypeToList(web, “Department”, ” Department”); private void AddContentTypeToList(SPWeb web,string listName, string contentTypeName) { SPList list = web.Lists.TryGetList(listName); list.OnQuickLaunch = true; list.ContentTypesEnabled = true; list.Update(); SPContentType employeeContentType = web.ContentTypes[contentTypeName]; list.ContentTypes.Add(employeeContentType); list.ContentTypes["Item"].Delete(); list.Update(); } Next, I will cover how to create the lookup fields. The difference between creating a normal field and lookup fields is that you need to create the lookup fields after the lists are created. This is because the lookup fields references fields from the foreign list. 1. In your solution, you need to create a feature that deploys the list before deploying the lookup fields. 2. You need to write the following code in the feature receiver to add the lookup columns in the ContentType. C# //add the lookup fields SPFieldLookup departmentField = EnsureLookupField(currentWeb, “YBBESTDepartment”, currentWeb.Lists["DepartmentList"].ID, “Title”); //add to the content types SPContentType employeeContentType = currentWeb.ContentTypes["Employee"]; //Add the lookup fields as SPFieldLink employeeContentType.FieldLinks.Add(new SPFieldLink(departmentField)); employeeContentType.Update(true); private static SPFieldLookup EnsureLookupField(SPWeb currentWeb, String sFieldName, Guid LookupListID, String sLookupField) { //add the lookup fields SPFieldLookup lookupField = null; try { lookupField = currentWeb.Fields[sFieldName] as SPFieldLookup; } catch (Exception e) { } if (lookupField == null) { currentWeb.Fields.AddLookup(sFieldName, LookupListID, true); currentWeb.Update(); lookupField = currentWeb.Fields[sFieldName] as SPFieldLookup; lookupField.LookupField = sLookupField; lookupField.Group = “YBBEST”; lookupField.Required = true; lookupField.Update(); } return lookupField; }

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  • Facts Concerning a Reverse Email Look-Up

    A reverse email look-up, which is commonly known as an reverse email trace investigation, is a very beneficial type of service that is performed by a knowledgeable professional investigator that is t... [Author: Ed Opperman - Computers and Internet - June 17, 2010]

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