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  • Understanding how memory contents map into a struct

    - by user95592
    I am not able to understand how bytes in memory are being mapped into a struct. My machine is a little-endian x86_64. The code was compiled with gcc 4.7.0 from the Win64 mingw32-64 distribution for Win64. These are contents of the relevant memory fragment: ...450002cf9fe5000040115a9fc0a8fe... And this is the struct definition: typedef struct ip4 { unsigned int ihl :4; unsigned int version :4; uint8_t tos; uint16_t tot_len; uint16_t id; uint16_t frag_off; // flags=3 bits, offset=13 bits uint8_t ttl; uint8_t protocol; uint16_t check; uint32_t saddr; uint32_t daddr; /*The options start here. */ } ip4_t; When a pointer to such an structure (let it be *ip4) is initialized to the starting address of the above pasted memory region, this is what the debugger shows for the struct's fields: ip4: address=0x8da36ce ip4->ihl: address=0x8da36ce, value=0x5 ip4->version: address=0x8da36ce, value=0x4 ip4->tos: address=0x8da36d2, value=0x9f ip4->tot_len: address=0x8da36d4, value=0x0 ... I see how ihl and version are mapped: 4 bytes for a long integer, little-endian. But I don't understand how tos and tot_len are mapped; which bytes in memory correspond to each one of them. Thank you in advance.

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  • How does Google Analytics aggregate the Count of Visits (Frequency & Recency Report)?

    - by Brian Dant
    Here's my simple understanding of Count of Visits: Each person that comes to my site gets one "count" for each visit. They are put into a bucket of people with the same number of total counts -- if you visit twice, you are in the two bucket, if you visit six times, you are in the six bucket. From there, a report (Frequency & Recency) makes a line for each bucket and reaches into the bucket and totals the number of people in that bucket, putting that total in the second column. My Question: Will a two month report automatically put someone into two buckets, and put them on two separate lines in the Count of Visits table? This explaination makes it seem like a two-month long report will put the same person into a bucket twice, one bucket for each month. The two-month report will then show that person's visits on two different lines, instead of aggregating them. Example for Clarification: Bob comes to my site three times in January and seven times in February. I run a report for Jan 1 -- Feb 28. Will Bob be on both the Three Count line and the Seven Count line, or will he be on the Ten Count line?

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  • Contract Work - Lessons Learned

    - by samerpaul
    I thought I would write a post of a different nature today, but still relevant to the tech world. I do a lot of contract jobs myself and really enjoy it. It's nice to keep jumping from project to project, and not having to go to an office or keep regular hours, etc. I really enjoy it. I have learned a lot in the past few years of doing it (both from experience and from help given to me from others, and the internet) so I thought I'd share some of that knowledge/experience today.So here's my own personal "lesson's learned" that hopefully will help you if you find yourself doing contract work:Should I take the job?Ok, so this is the first step. Assuming you were given sufficient information about what they want, then you should really think about what you're capable of doing and whether or not you should take this job. Personally, my rule is, if I know it's possible, I'll say yes, even if I don't yet know how to do it. That's because the internet is such a great help, it would be rare to run into an issue that you can't figure out with some help. So if your clients are asking for something that you don't yet know how to program, but you know you can do it on the platform then go for it. How else are you going to learn?Use this rule with some limitation, however. If you're really lacking the expertise or foundation in something, then unless you have tons of time to complete the project, then I wouldn't say yes. For example, I haven't personally done any 3d/openGL programming yet so I wouldn't say yes to a project that extensively uses it. OK, so I want the job, but how much do I charge?This part can be tricky. There is no set formula really, but I have some tips for pricing that will hopefully give you a better idea on how to confidently ask your price and have them accept. Here are some personal guidelinesHow much time do you have to complete the project? If it's shorter than average, then charge more. You can even make a subtle note about this (or not so subtle if they still don't get it.) If it seems too short of a time (i.e. near impossible to complete), be sure to say that. It looks bad to promise a time that you can't keep--and it makes it less likely for them to return to you for work.Your Hourly rate: How long have you been working in that language? Do you have existing projects to back you up? Or previous contacts that can vouch for your work? Are there very few people with your particular skill set? All of these things will lend themselves to setting an hourly rate. I'd also try out a quick google search of what your line of work is, to see what the industry standard is at that point in time.I wouldn't price too low, because you want to make your time worth it. You also want them to feel like they're paying for quality work (assuming you can deliver it :) ). Finally, think about your client. If it's a small business, then don't price it too high if you want the job. If it's an enterprise (like a Fortune company), then don't be afraid to price higher. They have the budget for it.Fixed price: If they want a fixed price project, then you need to think about how many hours it will take you to complete it and multiply it by the hourly rate you set for yourself. Then, honestly, I would add 10-20% on top of that. Why? Because nothing ever works exactly how you want it to. There are lots of times that something "trivial" is way harder than it should be, or something that "should work" doesn't for hours and it eats away at your hourly rate. I can't count the number of times I encountered a logical bug that took away an entire's day work because debuggers don't help in those cases. By adding that padding in, it's still OK to have those days where you don't get as much done as you want. And another useful tip: Depending on your client, and the scope, you most likely want to set that you both sign off on a specification sheet before doing any work, and that any changes will result in a re-evaulation of the price. This is to help protect you from being handed a huge new addition to the project half-way in, without any extra payment.Scope of project: Finally, is it a huge project? Is it really small/fast? This affects how much your client will be willing to pay. If it sounds big, they will be willing to pay more for it. If it seems really small, then you won't be able to get away with a large asking price (as easily).Ok, I priced it, now what?So now that you have the price, you want to make sure it feels justified to your client. I never set a price before I can really think about everything. For example, if you're still in your introduction phase, and they want a price, don't give one! Just comment that you will send them a proposal sheet with all the features outlined, and a price for everything. You don't want to shout out a low number and then deliver something that is way higher. You also don't want to shock them with a big number before they feel like they are getting a great product.Make up a proposal document in a word editor. Personally, I leave the price till the very end. Why? Because by the time they reach the end, you've already discussed all the great features you plan to implement, and how it's the best product they'll ever use, etc etc...so your price comes off as a steal! If you hit them up front with a price, they will read through the document with a negative bias. Think about those commercials on TV. They always go on about their product, then at the end, ask "What would you pay for something like this? $100? $50? How about $20!!". This is not by accident.Scenario: I finished the job way earlier than expectedYou have two options then. You can either polish the hell out of the application, and even throw in a few bonus features (assuming they are in-line with the customer's needs) or you can sit and wait on it until you near your deadline. Why don't you want to turn it in too early? Because you should treat that extra time as a surplus. If you said it is going to take you 3 weeks, and it took you only 1, you have a surplus of 2 weeks. I personally don't want to let them know that I can do a 3 week project in 1 week. Why not? Because that may not always be the case! I may later have a 3 week project that takes all 3 weeks, but if I set a precedent of delivering super early, then the pressure is on for that longer project. It also makes it harder to quote longer times if you keep delivering too early.Feel free to deliver early, but again, don't do it too early. They may also wonder why they paid you for 3 weeks of work if you're done in 1. They may further wonder if the product sucks, or what is wrong with it, if it's done so early, etc.I would just polish the application. Everyone loves polish in their applications. The smallest details are what make an application go from "functional" to "fantastic". And since you are still delivering on time, then they are still going to be very happy with you.Scenario: It's taking way too long to finish this, and the deadline is nearing/here!So this is not a fun scenario to be in, but it'll happen. Sometimes the scope of the project gets out of hand. The best policy here is OPENNESS/HONESTY. Tell them that the project is taking longer than expected, and give a reasonable time for when you think you'll have it done. I typically explain it in a way that makes it sound like it isn't something that I did wrong, but it's just something about the nature of the project. This really goes for any scenario, to be honest. Just continue to stay open and communicative about your progress. This doesn't mean that you should email them every five minutes (unless they want you to), but it does mean that maybe every few days or once a week, give them an update on where you're at, and what's next. They'll be happy to know they are paying for progress, and it'll make it easier to ask for an extension when something goes wrong, because they know that you've been working on it all along.Final tips and thoughts:In general, contract work is really fun and rewarding. It's nice to learn new things all the time, as mandated by the project ,and to challenge yourself to do things you may not have done before. The key is to build a great relationship with your clients for future work, and for recommendations. I am always very honest with them and I never promise something I can't deliver. Again, under promise, over deliver!I hope this has proved helpful!Cheers,samerpaul

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  • Looking for alternative to NetNewsWire and Google Reader

    - by Janine Sisk
    I have used NetNewsWire on both Mac and iPhone for years, and have been reasonably happy. Unfortunately the latest version of NNW for Mac, which I just upgraded to, now matches Google Reader's policy of marking items read after 30 days. The older version I had been using did not do this. I regularly keep unread items for way longer than 30 days, and do eventually read them, so this is a major bummer for me. The iPhone version has behaved this way forever, but I was ok with that as long as I had the full list on my desktop. Keeping in sync between the iPhone and Mac is very important, so I need to find another online solution with clients available on both sides. I've done a little digging but haven't found much; it seems like Google has pretty much taken over this space. Any suggestions?

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  • For a Javascript library, what is the best or standard way to support extensibility

    - by Michael Best
    Specifically, I want to support "plugins" that modify the behavior of parts of the library. I couldn't find much information on the web about this subject. But here are my ideas for how a library could be extensible. The library exports an object with both public and "protected" functions. A plugin can replace any of those functions, thus modifying the library's behavior. Advantages of this method are that it's simple and that the plugin's functions can have full access to the library's "protected" functions. Disadvantages are that the library may be harder to maintain with a larger set of exposed functions and it could be hard to debug if multiple plugins are involved (how to know which plugin modified which function?). The library provides an "add plugin" function that accepts an object with a specific interface. Internally, the library will use the plugin instead of it's own code if appropriate. With this method, the internals of the library can be rearranged more freely as long as it still supports the same plugin interface. This could also support having different plugin interfaces to modify different parts of the library. A disadvantage of this method is that the plugins may have to re-implement code that is already part of the library since the library's internal functions are not exported. The library provides a "set implementation" function that accepts an object inherited from a specific base object. The library's public API calls functions in the implementation object for any functionality that can be modified and the base implementation object includes the core functionality, with both external (to the API) and internal functions. A plugin creates a new implementation object, which inherits from the base object and replaces any functions it wants to modify. This combines advantages and disadvantages of both the other methods.

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  • How to explain a layperson why a developer should not be interrupted while neck-deep in coding?

    - by András Szepesházi
    If you just consider the second part of my question, "Why a developer should not be interrupted while neck-deep in coding", that has been discussed a number of times by smart people. Heck, even the co-founder of SO, Joel Spolsky, wrote a blog post about "getting in the zone" and "being knocked out of the zone" and why it takes an average of 15 minutes to achieve productivity when participating in complex, software development related tasks. So I think the why has been established. What I'm interested in is how to explain all that to somebody who doesn't know beans about Beans (khmm I mean software development). How to tell the wife, or the funny guy from accounting at the workplace, or the long time friend who pings you on Skype every 30 minutes with a "Wazzzzzzup?!", that all the interruptions have a much deeper impact on your work than the obvious 30 seconds they took from your time. Obviously you can't explain it by sentences like "I have to juggle a lot of variable names in my short term memory" unless you want to be the target of blank stares or friendly abuse. I'd like to be able to explain all that to non-developers in a way that will make them clearly understand - without being offensive, elitist or too technical. EDIT: Thanks to everyone for their great insights. I've accepted EpsilonVector's answer as his analogy was the closest one to my original needs. The "falling asleep" explanation is neither offensive nor technical, almost anyone can relate to it, and the consequences of getting disturbed while falling asleep or while being in the zone are very similar: you experience frustration and you "lose" 15-20 minutes of time.

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  • What should a developer know before building a public web site?

    - by Joel Coehoorn
    What things should a programmer implementing the technical details of a web site address before making the site public? If Jeff Atwood can forget about HttpOnly cookies, sitemaps, and cross-site request forgeries all in the same site, what important thing could I be forgetting as well? I'm thinking about this from a web developer's perspective, such that someone else is creating the actual design and content for the site. So while usability and content may be more important than the platform, you the programmer have little say in that. What you do need to worry about is that your implementation of the platform is stable, performs well, is secure, and meets any other business goals (like not cost too much, take too long to build, and rank as well with Google as the content supports). Think of this from the perspective of a developer who's done some work for intranet-type applications in a fairly trusted environment, and is about to have his first shot and putting out a potentially popular site for the entire big bad world wide web. Also: I'm looking for something more specific than just a vague "web standards" response. I mean, HTML, JavaScript, and CSS over HTTP are pretty much a given, especially when I've already specified that you're a professional web developer. So going beyond that, Which standards? In what circumstances, and why? Provide a link to the standard's specification. This question is community wiki, so please feel free to edit that answer to add links to good articles that will help explain or teach each particular point. To search in only the answers from this question, use the inquestion:this option.

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  • Remote desktop sessions - Unwanted automatic log off after period of time

    - by alex
    I'm having an issue whenever I connect to any of our servers via RDP - After a certain period of time, it seems to close these sessions, closing all the applications i had open etc... This is particularly annoying if I am running a long process - for example, copying a file - it cuts it off... I then re-connect via RDP, and it effectively loads a new session. Is this set somewhere in Group Policy? Or somewhere else? This is happening on Windows 2008 (it may also be on our 2003 servers, although I haven't noticed...)

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  • What do you do to make sure you take proper/enough breaks, while avoiding unwanted side-effects of break taking?

    - by blueberryfields
    preamble It seems to me that computer programmers are one of a select few groups of people who actually take pleasure from sitting in front of computers for long periods of time. Most people in other professions actively dislike their time at computers, and do their best to avoid it (so, I assume, they don't have problems taking breaks). At least for me, having external cues for taking breaks, and clear instructions on what to do with each break (stretch, go for a walk, close my eyes, look into a distance of preferably a few km and focus on faraway objects, etc...), is a must. So far, I've just been making up the breaks and tools to get them as I go along, based on what looks to be low-specificity information found on the net (generic stuff ala ergonomics advice for office staff). This has led to all sorts of side effects - loss of attention as I get distracted if I walk around, breaks in flow with alarm clocks interrupting my thoughts, and people around me assuming I'm low on work due to the frequency of my walking around compared to everyone else. /preamble tl;dr Taking breaks is important My internal break taking system doesn't work, and ad-hoc ones have unwanted side effects What do you do to make sure you take proper breaks? How do you avoid unwanted side-effects, such as getting distracted or interrupting flow or giving your co-workers the impression you're spending a lot of time goofing off?

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  • If I install Ubuntu 12.04, will it recognize all of my RAM?

    - by user91048
    I have a question that's been bugging me since a long time. A friend of mine told me that when he had Ubuntu 11.10 installed the OS only recognized 3.4GB instead of 8GB. In the next week I'll be buying a new computer and I'll have 8GB of RAM, does the Video Card need to have it's own video memory for the OS to recognize the RAM entirely?. If you could give me some advise on how to configure my PC before I buy it it would be great. Thanks. Tengo una duda que me ronda de hace tiempo. Un amigo mio me comento que con ubuntu 11.10 tenia 8 gb de RAM y que solo le reconocia 3.4. Dentro de unos 5 dias me comprare un ordenador nuevo a base de componentes y voy a meterle 8 gb de RAM. ¿Hace falta que la tarjeta gráfica tenga Gb dedicados para que el sistema me reconozca la RAM entera? Si podeis darme algunos consejillos sobre como configurar el PC antes de comprarmelo para que ese problema no me pase, Muchisimas Gracias.

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  • Windows replacement for HAProxy

    - by GrayWizardx
    It does not appear that there is a similar question to this already posted, so I will go ahead and ask. I am working on a project that could benefit from having two - four servers handling incoming requests to a backend webservice. The service does not require SSL but does need to support occassional long running processes (upto 120 secs). This project does not at present have the funding to purchase a hardware load balancing solution. I have previously used HAProxy as a solution for this, and found it very simple and straightforward. Is there a similar product for windows (server 2003 or 2008) which provides similar configuration options and runs as a lightweight service? For reasons outside my control I cannot setup a Linux machine (physical or virtual) and so I am looking for behaviour that can be deployed on a windows machine. I can only find Perlbal which appears to fall into this category. So as not to keep this open indifenitely I will give credit to the only answer.

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  • Maximum Length Of IP Address: 15 (IPv4) & 39(IPv6)

    - by Gopinath
    Problem You are designing a database table for a web application that requires to store IP address of users who visits the site. The IP address is required to be stored a character data in the table. To define size of the character column you need to know maximum length of IP address. So, what is the maximum length of an IP address? Solution The IPv4 version of IP address is in the following format 255.255.255.255 To store IPv4 address we require 15 characters. The IPv6 version of IP address is grouped into sets of 4 hex digits separated by colons, like the below 2001:0db8:85a3:0000:0000:8a2e:0370:7334 To store IPv6 address you require a 39 characters long column. Conclusion As IPv4 and IPv6 are the commonly use protocols, you better define a column with 39 characters length so that both the format address are saved in to the table without any issues. This article titled,Maximum Length Of IP Address: 15 (IPv4) & 39(IPv6), was originally published at Tech Dreams. Grab our rss feed or fan us on Facebook to get updates from us.

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  • Is there ever a reason to do all an object's work in a constructor?

    - by Kane
    Let me preface this by saying this is not my code nor my coworkers' code. Years ago when our company was smaller, we had some projects we needed done that we did not have the capacity for, so they were outsourced. Now, I have nothing against outsourcing or contractors in general, but the codebase they produced is a mass of WTFs. That being said, it does (mostly) work, so I suppose it's in the top 10% of outsourced projects I've seen. As our company has grown, we've tried to take more of our development in house. This particular project landed in my lap so I've been going over it, cleaning it up, adding tests, etc etc. There's one pattern I see repeated a lot and it seems so mindblowingly awful that I wondered if maybe there is a reason and I just don't see it. The pattern is an object with no public methods or members, just a public constructor that does all the work of the object. For example, (the code is in Java, if that matters, but I hope this to be a more general question): public class Foo { private int bar; private String baz; public Foo(File f) { execute(f); } private void execute(File f) { // FTP the file to some hardcoded location, // or parse the file and commit to the database, or whatever } } If you're wondering, this type of code is often called in the following manner: for(File f : someListOfFiles) { new Foo(f); } Now, I was taught long ago that instantiated objects in a loop is generally a bad idea, and that constructors should do a minimum of work. Looking at this code it looks like it would be better to drop the constructor and make execute a public static method. I did ask the contractor why it was done this way, and the response I got was "We can change it if you want". Which was not really helpful. Anyway, is there ever a reason to do something like this, in any programming language, or is this just another submission to the Daily WTF?

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  • Is there a successor to NTFS?

    - by hak8or
    What I am asking is if there is any file system that is known to be a possible successor of NTFS? I am asking because I just bought a new external, and realized that the path to a file, including the file name itself, cannot add up to more than 255 characters. This is known as the "Long File Name" by microsoft. I am assuming this is due to the file system limitation, so I am searching for any possible alternatives. I have a windows 7 based machine, but I am under the assumption that there would be third party software that would work with windows to make the new file system accessible by windows explorer.

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  • .htaccess redirect - Is it secure?

    - by thecrandallster
    This works; I'm not having trouble, but I want to be certain that this is bulletproof. I came up with a neat little .htaccess redirect, but I am not sure if it is secure; do you know? <IfModule mod_rewrite.c     RewriteEngine On     RewriteRule ^goto/([a-z]+)/?$ /$1/ [R] </IfModule I think as long as the server is configured correctly and the files handle authentication autonomously, then it shouldn't be a security issue. Also, being that the rewrite rule only works with characters a-z and one slash I doubt they could jump around directories by injecting stuff into the URL I think...

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  • Is there such a thing as a super programmer? [closed]

    - by Muhammad Alkarouri
    Have you come across a super programmer? What identifies him or her as such, compared to "normal" experienced/great programmers? Also. how do you deal with a person in your team who believes he is a super programmer? Both in case he actually is or if he isn't? Edit: Interesting inputs all round, thanks. A few things can be gleaned: A few definitions emerged. Disregarding too localised definitions (that identified the authors or their acquaintance as super programmers), I liked a couple definitions: Thorbjørn's definition: a person who does the equivalent of a good team consistently for a long time. Free Electron, linked from Henry's answer. A very productive person, of exceptional abilities. The explanation is a good read. A Free Electron can do anything when it comes to code. They can write a complete application from scratch, learn a language in a weekend, and, most importantly, they can dive into a tremendous pile of spaghetti code, make sense of it, and actually getting it working. You can build an entire businesses around a Free Electron. They’re that good. Contrasting with the last definition, is the point linked to by James about the myth of the genius programmer (video). The same idea is expressed as egoless programming in rwong's comment. They present opposite opinions as whether to optimise for such a unique programmer or for a team. These definitions are definitely different, so I would appreciate it if you have an input as to which is better. Or add your own if you want of course, though it would help to say why it is different from those.

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  • Recover a deleted webpage

    - by rc
    Suppose, a blog or a nice article was hosted on a website and it got deleted or worse the website was brought down. How do you view that web page? I tried searching for the cached version in Google. But, looks like the content was deleted long ago and is not listed in the search results directly. There are annotations to the link from many other sites, but still the actual content is not fully available. Now, can anybody help me see this page... I am actually looking for http://effectize.com/become-coolest-programmer :) And, moreover, in addition to bookmarking a favorite link, is it possible to cache the content of the link as well for later reference in case it gets deleted? EDIT: Looks like a URL can be cached for future reference. Try: http://backupurl.com/

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  • Ubuntu server 11.04 recognize only 1 core instead of 4

    - by Kreker
    I searched for other questions and googled a lot but I don't find a solution for solving this problem. Ubuntu Server 11.04 64bit installed on Dell Poweredge with Intel Xeon X5450. He only recognize 1 of the 4 cores I have. Tried to modify the GRUB config but didn't work. IN the machine BIOS I didn't find anything useful. CPU root@darwin:~# cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 23 model name : Intel(R) Xeon(R) CPU X5450 @ 3.00GHz stepping : 10 cpu MHz : 2992.180 cache size : 6144 KB physical id : 0 siblings : 1 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 xsave lahf_lm dts tpr_shadow vnmi flexpriority bogomips : 5984.36 clflush size : 64 cache_alignment : 64 address sizes : 38 bits physical, 48 bits virtual power management: GRUB root@darwin:~# cat /etc/default/grub # If you change this file, run 'update-grub' afterwards to update # /boot/grub/grub.cfg. # For full documentation of the options in this file, see: # info -f grub -n 'Simple configuration' GRUB_DEFAULT=0 #GRUB_HIDDEN_TIMEOUT=0 GRUB_HIDDEN_TIMEOUT_QUIET=true GRUB_TIMEOUT=2 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` GRUB_CMDLINE_LINUX_DEFAULT="" GRUB_CMDLINE_LINUX="noapic nolapic" #was with acpi=off # Uncomment to enable BadRAM filtering, modify to suit your needs # This works with Linux (no patch required) and with any kernel that obtains # the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...) #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef" # Uncomment to disable graphical terminal (grub-pc only) #GRUB_TERMINAL=console # The resolution used on graphical terminal # note that you can use only modes which your graphic card supports via VBE # you can see them in real GRUB with the command `vbeinfo' #GRUB_GFXMODE=640x480 # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux #GRUB_DISABLE_LINUX_UUID=true # Uncomment to disable generation of recovery mode menu entries #GRUB_DISABLE_RECOVERY="true" # Uncomment to get a beep at grub start #GRUB_INIT_TUNE="480 440 1" Complete dmesg Too long, posted on pastebin http://pastebin.com/bsKPBhzu

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  • Host wildcard subdomains using postfix.

    - by Jack M.
    I'm trying to work out how I can get postfix to accept email for any sub-domain of my main site. I don't have virtual domains, just a long list of sub-domains for local delivery. In specific, I'm feeding python@*.mydomain.com into a Python using the alias file: python: |/www/proc_email.py The Python can handle delivery from there. I envision this looking something along the lines of: mydestination = encendio, localhost.localdomain, localhost, *.mydomain.com I'm running the latest version of postfix on Ubuntu (not rightly sure how to check the version). Thanks in advance.

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  • SharePoint 2010 in the cloud a.k.a. SharePoint Online

    - by Sahil Malik
    Ad:: SharePoint 2007 Training in .NET 3.5 technologies (more information). There are 3 ways to run SharePoint On premises, you buy the servers, and you run the servers. Hosted servers, where you don’t run the servers, but you let a hosting company run dedicated servers. Multi-tenant, like SharePoint online – this is what I am talking about in this blog post. Also known as SaaS (Software as a Service). The advantages of a cloud solution are undeniable. Availability, (SharePoint line offers a 99.9% uptime SLA) Reliability. Cost. Due to economies of scale, and no need to hire specialized dedicated staff. Scalability. Security. Flexibility – grow or shrink as you need to. If you are seriously considering SharePoint 2010 in the cloud, there are some things you need to know about SharePoint online. What will work - OOTB Customization, collaboration features etc. will work SharePoint Designer 2010 is supported, so no code workflows will work Visual Studio sandbox solutions, client object model will work. What won’t work - SharePoint 2010 online cloud environment supports only sandbox solutions. BCS, business connectivity services is not supported in SharePoint online. What you can do however is to host your services in Azure, and call them using Silverlight. Custom timer jobs will not work. Long story short, get used to Sandbox solutions – and the new way of programming. Sandbox solutions are pretty damn good. Most of the complaints I have heard around sandbox solutions being too restrictive, are uninformed mechanisms of doing things mired in the ways of 2002. .. or you could just live in 2002 too. Comment on the article ....

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  • RPi and Java Embedded GPIO: Hooking Up Your Wires for Java

    - by hinkmond
    So, you bought your blue jumper wires, your LEDs, your resistors, your breadboard, and your fill of Fry's for the day. How do you hook this cool stuff up to write Java code to blink them LEDs? I'll step you through it. First look at that pinout diagram of the GPIO header that's on your RPi. Find the pins in the corner of your RPi board and make sure to orient it the right way. The upper left corner pin should have the characters "P1" next to it on the board. That pin next to "P1" is your Pin #1 (in the diagram). Then, you can start counting left, right, next row, left, right, next row, left, right, and so on: Pins # 1, 2, next row, 3, 4, next row, 5, 6, and so on. Take one blue jumper wire and connect to Pin # 3 (GPIO0). Connect the other end to a resistor and then the other end of the resistor into the breadboard. Each row of grouped-together holes on a breadboard are connected, so plug in the short-end of a common cathode LED (long-end of a common anode LED) into a hole that is in the same grouping as where the resistor is plugged in. Then, connect the other end of the LED back to Pin # 6 (GND) on the RPi GPIO header. Now you have your first LED connected ready for you to write some Java code to turn it on and off. (As, extra credit you can connect 7 other LEDs the same way to with one lead to Pins # 5, 7, 11, 13, 15, 19 & 21). Whew! That wasn't so bad, was it? Next blog post on this thread will have some Java source code for you to try... Hinkmond

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  • Changing website Url - Am I making an SEO mistake

    - by Denis
    I have a webiste with a .com domain that is a year old. The business is a shop based in Ireland and I have purchased a .ie domain. I plan to move the website over to the new domain, SEO Good or Bad idea? Old Url - SmythsOfTerenure.com | New Url - SmythsComputerRepair.ie (I am using Fake names and fictional business in the example Url's) The new domain has my main keyword in it. The old domain has my family name and business location (city district) It currently ranks high for lots of relevant keywords in Google with low traffic and low competition. Current website traffic is about 80 session per week. 80% of that traffic is Organic from Google. I am changing domain in an attempt to help SEO long term by having a CC TLD (.ie rather than .com) and having my main Keyword in the domain. I plan to do 301 re-directs from old to new and update GW Tools and G Analytics but am I making a mistake changing it at all as I know rankings may fall in the sort term. Homepage PR=0 and very few inbound links. Should I just leave it on the old domain? Or after a few months should I be back up ranking as well as I am now?

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  • Benefits of Server-side Coding

    There are numerous advantages to server scripting languages over client side languages in regards to creating web sites that are more compelling compared to a standard static site. Server side scripting are scripts that are executed on a web server during the compilation of data to return to a client. These scripts allow developers to modify the content that is being sent to the user prior to the return of the data to the user as well as store information about the user. In addition, server side scripts allow for a controllable environment in which they can be executed. This cannot be said for client side languages because the developer cannot control the users’ environment compared to a web server. Some users may turn off client scripts, some may be only allow limited access on the system and others may be able to gain full control of the environment.  I have been developing web applications for over 9 years, and I have used server side languages for most of the applications I have built.  Here is a list of common things I have developed with server side scripts. List of Common Generic Functionality Send Email FTP Files Security/ Access Control Encryption URL rewriting Data Access Data Creation I/O Access The one important feature server side languages will help me with on my website is Data Access because my component will be backed with a SQL server database. I believe that form validation is one instance where I might see server-side scripts and JavaScript used interchangeably because it does not matter how or where the data is validated as long as the data that gets inserted is valid. However, I would have to say that my personal experience would have to sway me in deciding what type of languages to use for form validation because they both have advantages and disadvantages based on the each situation.

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  • Must developers understand the business domain or should the specification be sufficient?

    - by Jerome C.
    I work for a company for which the domain is really difficult to understand because it is high technology in electronics, but this is applicable to any software development in a complex domain. The application that I work on displays a lot of information, charts, and metrics which are difficult to understand without experience in the domain. The developer uses a specification to describe what the software must do, such as specifing that a particular chart must display this kind of metrics and this metric is the following arithmetic formula. This way, the developer doesn't really understand the business and what/why he is doing this task. This can be OK if specification is really detailled but when it isn't or when the author has forgotten a use case, this is quite hard for the developer to find a solution. At the other hand, training every developer to all the business aspects can be very long and difficult. Should we give more importance to detailled specification (but as we know, perfect specification does not exist) or should we train all the developers to understand the business domain? EDIT: keep in mind in your answer that the company could used external developpers.

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  • Easily tell if focused on VirtualBox window?

    - by Benjamin Oakes
    Is there a way to make it very obvious that my VirtualBox window isn't in focus? The problem I'm having is switching between workspaces on Ubuntu or OS X and then trying to type in my Windows virtual machine, only to find that it's not in focus. The Windows window looks like it's in focus (based on the title bar), but I'm actually typing in Firefox on the host machine, for example. It's even worse because the Windows text insertion cursor is blinking to show focus. Ideally, I'd like the VM's display to get unsaturated (e.g. a "partial" grayscale) when not in focus, just to prevent this keyboard-focus problem. Other options would be fine too, as long as I don't have to second guess where my focus is. I'm not using the seamless mode -- the display is all within a window.

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