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• Help to calculate hours and minutes between two time periods in Excel 2007

  - by Mestika

  Hi, I’m working on a very simple timesheet for my work in Excel 2007 but have ran into trouble about calculate the hours and minutes between two time periods. I have a field: timestart which could be for example: 08:30 Then I have a field timestop which could be for example: 12:30 I can easy calculate the result myself which is 4 hours but how do I create a “total” table all the way down the cell that calculate the hours spend on each entry? I’ve tried to play around with the time settings but it just give me wrong numbers each time. Sincerely Mestika

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• A new CAPTCHA using sentences?

  - by Xeoncross

  I was just thinking about how recaptcha is getting harder when I thought about another posible solution. Images won't last forever so we will need something else some day - like human logic or emotion. Google and others are trying grouping images by category (find the image that doesn't belong) but that requires a large amount of images and doesn't work for the blind. Anyway, what if a massive collection of text was gathered (public-domain books from each language) and a sentence was shown to the user with 1 (or 2) words that were a select box of choices? Only computers that knew correct English/Spanish/German grammar would be able to tell which of the words belonged in the sentence. Would there be any problems with this approach? I would assume that it would be easy enough for anyone that knew the language that the sentense was displayed in to figure out the answer easier than trying to read the reCAPTCHA text. Plus, storing an insane number of sentences would only take a couple gigabytes of space and wouldn't take anywhere near the CPU time creating images/audio takes. In other words, anyone could host their own captcha system with minimal impact on system performance. Is there a problem with this approach? More specifically I'm looking for the main problem with this approach. migrated from stackoverflow

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• Mouse for a lefty?

  - by Kyralessa

  As a programmer, I'm fairly particular about my keyboard and mouse. One thing I've only recently noticed is that the mice I tend to prefer don't work well for my five-year-old. He's left-handed, but ends up mousing with his right hand on the computer because (a) that's where the mouse is, and (b) most mice are designed for right-handed people anyway. So, a couple of questions: If you're left-handed and you mouse with your left hand, do you have any recommendations on good mice? If you have a lefty in your household (whether or not it's you), is there an easy way to swap settings between left-handed and right-handed mouse buttons? One way is Control Panel Mouse Check the box on the first tab OK. Do you know of anything faster? Or, better yet, what I'd really like is a way to reverse those settings on only one particular mouse, which would be designated as my son's mouse.

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• How safe is locking the screen?

  - by D Connors

  So, both windows and linux have a pretty useful feature that allows you to leave everything running on the PC while also keeping invaders away by locking the screen. My question is: Say I leave my laptop with the screen locked while I go get a donnut, and then it gets stolen. Assuming the thief has access to whatever software he needs, how easy/hard would it be for him to access my (currently logged-in) account? Now let me be clear. I'm not asking if he can access the data on the harddrive. I know he can, and that issue would go under data encryption, which is not my question here. I'm focusing on how hard would it be to get around the "Insert Password" screen, and have full access to my account. I'm looking for answers regarding both OS's; but, if needed, assume Ubuntu. Thank you.

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• Does every SmartCard have unique ID?

  - by mr.b

  Does anyone knows if every SmartCard has some unique identifying number that can be read by using ordinary card reader? Number format doesn't matter at all (or string format), just the fact that it exists and that it's readable is enough. I know that new smartcards can be programmed to my liking, and that I can issue unique IDs to them in the process, but I'm more interested in reading unique ID from credit cards, phone calling cards, stuff like that. I should probably mention what is intended purpose for this, before I get incinerated. I want to find easy way to uniquely identify walk-in customers, most of people have at least one smartcard in their pocket...

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• Load balance between two virtual directories on a single machine running IIS6

  - by Emil Lerch

  I'm trying to simulate a production environment using a single VM. The production environment will have 3 servers behind a load balancer with sticky sessions. Production will be using IIS6. For development, I have no need to distribute load, but I want to make sure the team does not write code that relies on a single-server module. I have been hoping to set up two virtual directories and find some isapi filter to perform some rudimentary software load balancing, but I've been unable to locate anything suitable. isapi_rewrite comes close but there's no ability for a random rewrite. I don't even need sticky sessions since the application does not (in theory) rely on them. Is there something easy/free to do this, or am I stuck with multiple VMs and a NLB setup (which seems like total overkill)?

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• Quickly Generate Siri Fake Conversation Screenshots – iFakeSiri.com

  - by Gopinath

  One of the best features introduced in Apple iPhone 4S is Siri, the virtual personal assistant that obeys to the commands and answers to the questions. Siri is a lot of fun to use and at times it says few weird stuff. To read some of the funniest replies given by Siri check the site shitsirisays.com. But how many of the screenshots shared on the web are real? Because it’s pretty easy to fake a Siri screenshots and you don’t even need to have Photoshop skills for that. To generate fake Siri screenshots just go to the website ifakesiri.com, enter the text whatever you want and click on generate button. That’s all you will have a fake siri screenshot to spread it around the web. Here is one such screenshot I created   Visit ifakesiri.com and have fun in generating fake Siri screenshots This article titled,Quickly Generate Siri Fake Conversation Screenshots – iFakeSiri.com, was originally published at Tech Dreams. Grab our rss feed or fan us on Facebook to get updates from us.

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• Addicted to the MIX Buzz

  - by Dave Campbell

  Well it's the Friday before MIX10, and I'm officially of no use to anybody. I'll be driving up to 'Vegas Sunday ... hopefully rolling in mid-late afternoon, checking in at my $31.50/night (including WiFi) Motel, and getting registered then hanging out around registration to see who is there. First organized thing to do is 9PM, so I'm open to suggestions Sunday evening... maybe we can get a gang together for dinner ?? Monday is the Keynote ... I'm addicted to the buzz in the ballroom the first day, hope to be close to the front, trying to live blog. Then straight to Ballroom A and stake out the spot I'll be in for all 3 days, and you all know why :) I've tagged 40 sessions that I 'want' to see, and there's only 12 slots... damn... if I could, I'd try the Multiplicity thing, but I'm afraid I'd get the idiot first try -- or maybe got that one already :) ... but at least I tagged them to make it easy to find after the videos are up. Stuff going on Sunday, Monday, and Tuesday night. I'm staying over for an event on Thursday, and driving back on Friday. I'm not sure how much blogging I'll be doing, but I'll try to hit some 'Cream high spots. I'm sure everyone #NotAtMIX is going to be tuned into the sessions online. I'll be wearing TShirts with WynApse.com and SilverlightCream.com printed on the back... so if you see some old curmudgeon with such a shirt, IT'S ME! I look forward to seeing all the people I only see once or twice a year, and meeting ones I haven't met yet What a week... Bring It On and Stay in the 'Light! Technorati Tags: Silverlight    Silverlight 4    MIX10

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• How should I unbind and delete OpenAL buffers?

  - by Joe Wreschnig

  I'm using OpenAL to play sounds. I'm trying to implement a fire-and-forget play function that takes a buffer ID and assigns it to a source from a pool I have previously allocated, and plays it. However, there is a problem with object lifetimes. In OpenGL, delete functions either automatically unbind things (e.g. textures), or automatically deletes the thing when it eventually is unbound (e.g. shaders) and so it's usually easy to manage deletion. However alDeleteBuffers instead simply fails with AL_INVALID_OPERATION if the buffer is still bound to a source. Is there an idiomatic way to "delete" OpenAL buffers that allows them to finish playing, and then automatically unbinds and really them? Do I need to tie buffer management more deeply into the source pool (e.g. deleting a buffer requires checking all the allocated sources also)? Similarly, is there an idiomatic way to unbind (but not delete) buffers when they are finished playing? It would be nice if, when I was looking for a free source, I only needed to see if a buffer was attached at all and not bother checking the source state. (I'm using C++, although approaches for C are also fine. Approaches assuming a GCd language and using finalizers are probably not applicable.)

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• How to use IIS as a trusted proxy for ActiveDirectory SSO?

  - by brofield

  I'm trying to add Active Directory single-sign-on support to an existing SOAP server. The server can be configured to accept a trusted reverse-proxy and use the X-Remote-User HTTP header for the authenticated user. I want to configure IIS to be the trusted proxy for this service, so that it handles all of the Active Directory authentication for the SOAP server. Basically IIS would have to accept HTTP connections on port X and URL Y, do all the authentication, and then proxy the connection to a different server (most likely the same X and Y). Unfortunately, I have no knowledge of IIS or AD (so I am trying my best to learn enough to build this solution) so please be gentle. I would assume that this is not an uncommon scenario, so is there some easy way to do this? Is this sort of functionality built into IIS or do I need to build some sort of IIS proxy program myself? Is there a better option for getting the authentication done and the X-Remote-User HTTP header set than requiring IIS?

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• Announcing IIS Community Newsletter

  - by steve schofield

  I'm excited to announce a newsletter for the IIS community is available.  Here is the link to signup.  The goal is to cover all happenings in the IIS community.  The goal is to have a monthly newsletter.  Sign-up for IIS Community Newsletterhttp://www.iislogs.com/newsletter/ A little history.  l previously was involved with Brett Hill and authoring the IIS Answers newsletter for about 1 year.  The newsletter literally reached thousands of IIS administrators providing up-to-date Microsoft and community related information.  It was an excellent source of information.  That is my goal with the IIS Community Newsletter. With everything, there is always some "geeking" that goes into it.  I'm using www.StarDeveloper.com newsletter application.   For a modest $10.00 fee, the application provides a simple, yet powerful way to manage newsletters.  I added a CAPTCHA feature to sign-up.  The CAPTCHA module I used was provided free by MONDOR software.  I personally never used one on a application and it was easy to implement.  Thanks for sharing!  Cheers, Steve SchofieldMicrosoft MVP - IIS

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• How to improve Algorithmic Programming Solving skill? [closed]

  - by gaurav

  Possible Duplicate: How can I improve my problem-solving ability? How do you improve your problem solving skills? Should I learn design patterns or algorithms to improve my logical thinking skills? What to do when you're faced with a problem that you can't solve quickly? Are there non-programming related activities akin to solving programming problems? I am a computer engineering graduate. I have studied programming since three years. I am good in coding and programming. I have been trying to compete in algorithmic competitions on sites such as topcoder,spoj since one and a half year, but I am still unable to solve problems other than too easy problems. I have learned from people that it takes practice to solve such problems. I try to solve those problems but sometimes I am unable to understand and even if I do understand I am unable to think of a good algorithm for solving it. Even if I solve I get Wrong answer and I am unable to figure out what is the problem with my code as it works on samples given on the sites but fails on test cases which they do not provide. I really want to solve those problems and become good in algorithms. I have read books for learning algorithms like Introduction to algorithms by CLRS,practicing programming questions. I have gone through some questions but they don't answer this question. I have seen the questions which are said duplicates but those questions focus on overall programming, but I am asking for algorithm related programming, basically for competing in programming which involve solving a problem statement then online judge will automatically evaluate it, such type of programming is quite different from the type of programming these questions discuss.

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• Linux or Windows for a server?

  - by Matt

  I'm a Linux guy when it comes to (web) servers for the following reasons Legally free Fast software updates (Unless you're running Cent OS :) Powerful CLI management of services Easy to secure (in terms of users and groups) Web server software is, well, built for Linux... Apache, PHP, Python, etc, are Linux programs that get ported to Windows - I'm 90% sure of this Unless the web server needed to run ASP, I wouldn't use Windows. My boss' IT friend is a Windows guy, though. He recently got a server setup in the office to run Microsoft Exchange and some other shit. What I'm asking is, if he wanted to start running websites on this thing, what would be good reasoning to convince him otherwise? He's not very bright in terms of IT and the IT friend is all Windows. So it's two against one here... What would you say to running a Windows web server?

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• Domains with similar names and legal issues

  - by abel

  I recently purchased one of those domain names like del.icio.us. While registering I found that delicious.com was being used. Argument: I found that delicious.com belonged to the same category as my to-be website. It served premium delicious dishes. Counter Argument: My to-be domain though belonging to the same category, specialized in serving free but delicious dishes or in giving out links(affiliate) to other sites serving premium delicious dishes. Additional Counter Arguments: 1.delicious.com was not in English. 2.the del.icio.us in my domain name though having the same spelling, is not going to be used in the same fashion. For eg.(this may not make sense, because the names have been changed)the d in delicious on my website actually stands for the greek letter Delta(?/d) and since internationalized domains are still not easily typable, I am going for the english equivalent.The prefix holds importance for the theme of the service which my website intends to offer. My Question: Can I use the domain name del.icio.us for my website? How are these kinds of matters dealt? (The domain names used are fictitious. And I have already registered the domain but have not started using it.I chanced upon this domain name because it was short, easy to remember and suited the theme of my website.)

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• Email censorship system

  - by user1116589

  I would like to ask you about any censorship / moderation system. Basic workflow of events: Customer sends email to [email protected] from [email protected] ACME administrator receives notification and can moderate email After moderation administrator confirm an email and send it to [email protected] John answears to [email protected] Before the email is send it is moderated again by ACME administrator What is important, that this functionality is easy to do with some CMS/CMF systems. The problem is that we do not want to use an extra domain and force customer to login an extra system. Customer should only use his own email box or desktop email application. Thank you, Tomek

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• How to set up a (relatively) secure kiosk on Natty?

  - by Tim

  I'm trying to get my application to be the only thing a user sees when the machine is powered on - like a kiosk, but a little more secure. Ideally, what I'd like to happen is this: At machine power-on, the user sees the Ubuntu splash image, then my app. While the app is running, the user can't get back to the desktop or a text login prompt via any keyboard shortcut. This is the (relatively) secure bit. When the user exits the app, the user sees a shutdown image, then the machine powers off. In particular, I'd like to configure things so that the user never sees the Gnome desktop on startup or shutdown. At the moment, I've configured a default user to be logged on automatically, with an autostart item which starts my app, but after the Ubuntu startup screen the user sees the Gnome desktop briefly before my app is started. When the app is exited, the user is taken back to the Gnome desktop and has to shut the machine down manually. Also, because of time constraints, I can't really start over with a different window manager. Is there an easy way to configure all of this?

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• Message Queue: Which one is the best scenario?

  - by pandaforme

  I write a web crawler. The crawler has 2 steps: get a html page then parse the page I want to use message queue to improve performance and throughput. I think 2 scenarios: scenario 1: structure: urlProducer -> queue1 -> urlConsumer -> queue2 -> parserConsumer urlProducer: get a target url and add it to queue1 urlConsumer: according to the job info, get the html page and add it to queue2 parserConsumer: according to the job info, parse the page scenario 2: structure: urlProducer -> queue1 -> urlConsumer parserProducer-> queue2 -> parserConsumer urlProducer : get a target url and add it to queue1 urlConsumer: according to the job info, get the html page and write it to db parserProducer: get the html page from db and add it to queue2 parserConsumer: according to the job info, parse the page There are multiple producers or consumers in each structure. scenario1 likes a chaining call. It's difficult to find the point of problem, when occurring errors. scenario2 decouples queue1 and queue2. It's easy to find the point of problem, when occurring errors. I'm not sure the notion is correct. Which one is the best scenario? Or other scenarios? Thanks~

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• Disabling file permissions on NFS share

  - by user41377

  I am trying to set up a nfs share for use by non-technical users, and really don't want file permissions messing things up. Everyone should be able to read/write anything on this share without even knowing what file permissions are, much less adjusting them. Is there a way I can just make the nfs server write everything as 770 or something? It seems like this should be easy, but the best I can come up with is a cronjob to periodically set them to that, which is far from ideal. The server is a Netgear ReadyNAS. Ideally I would like to stick to doing stuff from within the web interface on it, but I can just root it if needed.

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• Linux to Solaris @ Morgan Stanley

  - by mgerdts

  I came across this blog entry and the accompanying presentation by Robert Milkoski about his experience switching from Linux to Oracle Solaris 11 for a distributed OpenAFS file serving environment at Morgan Stanley. If you are an IT manager, the presentation will show you: Running Solaris with a support contract can cost less than running Linux (even without a support contract) because of technical advantages of Solaris. IT departments can benefit from hiring computer scientists into Systems Programmer or similar roles.  Their computer science background should be nurtured so that they can continue to deliver value (savings and opportunity) to the business as technology advances. If you are a sysadmin, developer, or somewhere in between, the presentation will show you: A presentation that explains your technical analysis can be very influential. Learning and using the non-default options of an OS can make all the difference as to whether one OS is better suited than another.  For example, see the graphs on slides 3 - 5.  The ZFS default is to not use compression. When trying to convince those that hold the purse strings that your technical direction should be taken, the financial impact can be the part that closes the deal.  See slides 6, 9, and 10.  Sometimes reducing rack space requirements can be the biggest impact because it may stave off or completely eliminate the need for facilities growth. DTrace can be used to shine light on performance problems that may be suspected but not diagnosed.  It is quite likely that these problems have existed in OpenAFS for a decade or more.  DTrace made diagnosis possible. DTrace can be used to create performance analysis tools without modifying the source of software that is under analysis.  See slides 29 - 32. Microstate accounting, visible in the prstat output on slide 37 can be used to quickly draw focus to problem areas that affect CPU saturation.  Note that prstat without -m gives a time-decayed moving average that is not nearly as useful. Instruction level probes (slides 33 - 34) are a super-easy way to identify which part of a function is hot.

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• haproxy - pass original / remote ip in tcp mode

  - by Vito Botta

  I've got haproxy set up with keepalived for load balancing and ip failover of a percona cluster, and since it works great I'd like to use the same lb / failover for another service/daemon. I've configured haproxy this way: listen my_service 0.0.0.0:4567 mode tcp balance leastconn option tcpka contimeout 500000 clitimeout 500000 srvtimeout 500000 server host1 xxx.xxx.xxx.xx1:4567 check port 4567 inter 5000 rise 3 fall 3 server host2 xxx.xxx.xxx.xx2:4567 check port 4567 inter 5000 rise 3 fall 3 The load balancing works fine, but the service sees the IP of the load balancer instead of the actual IPs of the clients. In http mode it's quite easy to have haproxy pass along the remote IP, but how do I do in tcp mode? This is critical due to the nature of the service I need to load balance. Thanks! Vito

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• Hardware settings reviewing

  - by dino99

  Get some hardware related errors logged into dmesg: oem@dub:~$ dmesg | grep ata10 [ 1.007989] ata10: PATA max UDMA/133 cmd 0xa800 ctl 0xa480 bmdma 0xa408 irq 18 [ 1.691664] ata10: prereset failed (errno=-19) [ 1.691670] ata10: reset failed, giving up oem@dub:~$ dmesg | grep ata2 [ 0.990290] ata2: SATA max UDMA/133 abar m1024@0xfebfb800 port 0xfebfb980 irq 45 [ 1.688011] ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [ 1.688055] ata2.00: unsupported device, disabling [ 1.688057] ata2.00: disabled As I understand, its related to my old Seagate SATA HDD, and the PATA CDROM. These errors are quite new, so I feel that their settings (dma, write-cache, ...) have been modified by some upgrades. I've already used hdparm to set write-cache off on the HDDs. But it seems like I need to review some other setting(s) too. With oldest distro it was easy to know about the hardware settings, but now on Quantal/Precise its deeply hidden for the average user. So i would like to know how to view/modify these settings. About the CDROM reader, the problem is different: - the system don't identify it with an UUID; but only with ATAPI or by-id oem@dub:~$ dmesg|grep 'ATAPI' [ 1.308611] ata3.00: ATAPI: TSSTcorp CDDVDW SH-S203D, SB00, max UDMA/100 oem@dub:~$ ls -l /dev/disk/by-id/ ...... lrwxrwxrwx 1 root root 9 oct. 1 06:42 ata-TSSTcorp_CDDVDW_SH-S203D -> ../../sr0 .....

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• Dynamic/Adaptive RLE

  - by Lucius

  So, I'm developing a 2D, tile based game and a map maker thingy - all in Java. The problem is that recently I've been having some memory issues when about 4 maps are loaded. Each one of these maps are composed of 128x128 tiles and have 4 layers (for details and stuff). I already spent a good amount of time searching for solutions and the best thing I found was run-length enconding (RLE). It seems easy enough to use with static data, but is there a way to use it with data that is constantly changing, without a big drop in performance? In my maps, supposing I'm compressing the columns, I would have 128 rows, each with some amount of data (hopefully less than it would be without RLE). Whenever I change a tile, that whole row would have to be checked and I'm affraid that would slow down too much the production (and I'm in a somewhat tight schedule). Well, worst case scenario I work on each map individually, and save them using RLE, but it would be really nice if I could avoind that. EDIT: What I'm currently using to store the data for the tiles is a 2D array of HashMaps that use the layer as key and store the id of the tile in that position - like this: private HashMap< Integer, Integer [][]

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• Basket Analysis with #dax in #powerpivot and #ssas #tabular

  - by Marco Russo (SQLBI)

  A few days ago I published a new article on DAX Patterns web site describing how to implement Basket Analysis in DAX. This topic is a very classical one and is also covered in the many-to-many revolution white paper. It has been also discussed in several blog posts, listed here in historical order: Simple Basket Analysis in DAX by Chris Webb PowerPivot, basket analysis and the hidden many to many by Alberto Ferrari Applied Basket Analysis in Power Pivot using DAX by Gerhard Brueckl As usual, in DAX Patterns we try to present the required DAX formulas in a way that is easy to adapt to specific models. We also try to show a good implementation from a performance point of view. Further optimizations are always possible in DAX. However, in order to keep the model simple to adapt in different scenarios, we avoid presenting optimizations that would require particular assumptions or restrictions on the data model. I hope you will find the Basket Analysis pattern useful. Even if you do not need it today, reading the DAX formula is a good exercise to check your knowledge of evaluation contexts in DAX. For example, describing how does it work the following expression is not a trivial task! [Orders with Both Products] := CALCULATE (     DISTINCTCOUNT ( Sales[SalesOrderNumber] ),     CALCULATETABLE (         SUMMARIZE ( Sales, Sales[SalesOrderNumber] ),         ALL ( Product ),         USERELATIONSHIP ( Sales[ProductCode], 'Filter Product'[Filter ProductCode] )     ) ) The good news is that you can use the patterns even if you do not really understand all the details of the DAX formulas you are using! Any feedback on this new pattern is very welcome.

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• Handling Indirection and keeping layers of method calls, objects, and even xml files straight

  - by Cervo

  How do you keep everything straight as you trace deeply into a piece of software through multiple method calls, object constructors, object factories, and even spring wiring. I find that 4 or 5 method calls are easy to keep in my head, but once you are going to 8 or 9 calls deep it gets hard to keep track of everything. Are there strategies for keeping everything straight? In particular, I might be looking for how to do task x, but then as I trace down (or up) I lose track of that goal, or I find multiple layers need changes, but then I lose track of which changes as I trace all the way down. Or I have tentative plans that I find out are not valid but then during the tracing I forget that the plan is invalid and try to consider the same plan all over again killing time.... Is there software that might be able to help out? grep and even eclipse can help me to do the actual tracing from a call to the definition but I'm more worried about keeping track of everything including the de-facto plan for what has to change (which might vary as you go down/up and realize the prior plan was poor). In the past I have dealt with a few big methods that you trace and pretty much can figure out what is going on within a few calls. But now there are dozens of really tiny methods, many just a single call to another method/constructor and it is hard to keep track of them all.

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• GlusterFS with CIFS, quotas and LDAP

  - by lpfavreau

  Has anyone had experience plugging GlusterFS and Openfiler together or something similar? Here is the motivation: Disk space on multiple server regrouped using GlusterFS Centralized access using LDAP/AD and quota management using Openfiler as the GlusterFS client SMB/CIFS server for easy sharing to multiple users on Mac and Windows I know I can have Gluster installed on Openfiler (rPath Linux) successfully but Openfiler seems to be very picky on what it can use as a shared drive. Mounting the Gluster volume inside an existing share does not seem to allow quotas with the mounted folder free space. If this is not possible, is there any alternative to give the same capabilities?

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