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  • Suggestions to Purchase a System76 Ubuntu Pre-Installed Laptop

    - by user2956795
    I am looking to buy a new laptop that well supports Ubuntu, and recently came across the Ubuntu laptop manufactured by System76. I am not familiar with this brand although it seems to me they produce Ubuntu laptop with good performance. The price listed on their website is also not that expensive as compared with a MacBook Pro, or ThinkPad T series, or the Dell XPS Developer Edition Has anyone used System76 Ubuntu Laptop? I'd like to ask for your opinions. How is the experience. Is it worth to put the money on?

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  • wireless not enabling, wire works fine

    - by sibby
    I have a built in wireless (with a switch & light on hardware for it) its a Sony Vaio E-series with ubuntu running along side windows 7, the button in the menu for enable wireless is greyed out, and in edit connections window, when i click the button to make it 'ON' it turns it 'off' immediately while the wireless button is switched on & the wireless light flashes once for 3 seconds(light on hardware), wireless works perfectly and the light stays on (solid) on windows 7, and it works fine with wired connection on Ubuntu, 1st time I am trying a Linux OS, everything else works perfectly.

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  • Downclock CPU reaching critical temperature

    - by Draga
    I have an HP tx1250 laptop. It always had serious overheating problems and although usually it runs fine I'm now running a continuous test for my dissertation, this brings the CPU temp close to the critical and from time to time the computer shutdown for reaching it (checked the log). I use to have the same problem on Win XP but I noticed Win Vista and 7 downclock the CPU when is necessary to cool it down so I was thinking if the same is possible on Ubuntu 12. The only program I've found that may do the job is computer temp ( http://computertemp.berlios.de/ ) but it doesn't seems to work under Ubuntu 12. The inside of the laptop is fairly clean, the thermal paste is quite recent, I'm keeping it lifted from the desk and judjung by the sound of the fan that's running fine as well. The pc in now running between 78 and 91 degrees C but about once a day it shut down for reaching 95. I need the results of the test it's running pretty soon so it's important that it runs non-stop. I've though to set the maximum clock of the CPU to slightly less the maximum but then these tests I'm running would take much more time. Thanks! PS: first and last HP laptop for me.

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  • September issue of the Enterprise Manager Indepth Newsletter

    - by Javier Puerta
    The September issue of the Enterprise Manager Indepth Newsletter is now available here  Featured articles include: Oracle OpenWorld Preview: Don't-Miss Sessions, Hands-on Labs, and MoreBecause of the rapid and widespread adoption of Oracle Enterprise Manager 12c since its launch at Oracle OpenWorld 2011, conference organizers are expecting Oracle Enterprise Manager sessions to attract record crowds at Oracle OpenWorld 2012. Read More Oracle Cloud Builder Summit—Zero to Enterprise Cloud in Two HoursIn August, Oracle launched the worldwide Oracle Cloud Builder Summit series, an event where attendees learn firsthand how to plan, deploy, and manage an enterprise private cloud using Oracle Enterprise Manager 12c—all in a few hours. Read More WEBCASTS Reduce Database Testing Efforts While Maximizing ROIWatch this on-demand Webcast demonstrating how to manage database and system changes with confidence using Oracle Real Application Testing. Viewers will be among the first to hear results from Forrester Consulting's commissioned, multicustomer study, “Total Economic Impact of Oracle Real Application Testing.”

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  • Coding an IQ Test with Conditionally Driven Event Handlers in ASP.NET 3.5

    This is the second part of a tutorial series on developing conditionally-driven event handlers in ASP.NET 3.5. In part one you started learning how to build an online IQ test with ASP.NET 3.5 the creation of web forms and setting of objectives were discussed. In this second part we ll really sink our teeth into using conditionally-driven event handlers to make the test work.... Business Productivity Online Suite From $10 per user per month. Includes a 12-month subscription. Min 5 seats.

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  • How often do you review fundamentals?

    - by mlnyc
    So I've been out of school for a year and a half now. In school, of course we covered all the fundamentals: OS, databases, programming languages (i.e. syntax, binding rules, exception handling, recursion, etc), and fundamental algorithms. the rest were more in-depth topics on things like NLP, data mining, etc. Now, a year ago if you would have told me to write a quicksort, or reverse a singly-linked list, analyze the time complexity of this 'naive' algorithm vs it's dynamic programming counterpart, etc I would have been able to give you a decent and hopefully satisfying answer. But if you would have asked me more real world questions I might have been stumped (things like how would handle logging for an application, or security difference between GET and POST, differences between SQL Server and Oracle SQL, anything I list on my resume as currently working with [jQuery questions, ColdFusion questions, ...] etc) Now, I feel things are the opposite. I haven't wrote my own sort since graduating, and I don't really have to worry much about theoretical things that do not naturally fall into problems I am trying to solve. For example, I might give you some great SQL solutions using an analytical function that I would have otherwise been stumped on or write a cool web application using angular or something but ask me to write an algo for insertAfter(Element* elem) and I might not be able to do it in a reasonable time frame. I guess my question here to the experienced programmers is how do you balance the need to both learn and experiment with new technologies (fun!), working on personal projects (also fun!) working and solving real world problems in a timeboxed environment (so I might reach out to a library that does what I want rather than re-invent the wheel so that I can focus on the problem I am trying to solve) (work, basically), and refreshing on old theoretical material which is still valid for interviews and such (can be a drag)? Do you review older material (such as famous algorithms, dynamic programming, Big-O analysis, locking implementations) regularly or just when you need it? How much time do you dedicate to both in your 'deliberate practice' and do you have a certain to-do list of topics that you want to work on?

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  • Using Ubuntu isn't worth it for me, Windows works best.

    - by user72475
    Welcome to Ubuntu and the lack of support( 12.04 LOS ). If I say Ubuntu 12.04 is a so so broken OS, I will get flamed. But if I ask for help, I can here the crickets chirruping. Unix/Linux user have an attitude and really don't like to share info. Because if they help everyone, they wouldn't have anyone to call a noob. Then their moms basement wouldn't be the same without being able to flame Ubuntu noobs. I am going back to windows I don't have to spend all day trying to get a single app or option to work. Sure Ubuntu is fun to tinker with but it is not a professional consumer OS. Windows is a better consumer based os, I don't need server software(Unix) that's been broken and hacked to be used like windows(Ubuntu). All the time I have wasted trying to get Ubuntu to work CORRECTLY cost me more the Windows 7 ultimate by far. HOW MUCH IS YOUR TIME WORTH. If you are unemployed and have all night to set in your moms basement and flame noobs then Ubuntu is for you. If you want to use an external monitor on your notebook or download Adobe reader use Windows 7. When are we going to stop complaining about corporate giants like Microsoft and admit they have great products. Gave it a shot, did work for me, I have better things to do with my time. bye Ubuntu

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  • Understanding and Using Parallelism in SQL Server

    SQL Server is able to make implicit use of parallelism to speed SQL queries. Quite how it does it, and how you can be sure that it is doing so, isn't entirely obvious to most of us. Paul White begins a series that makes it all seem simple, starting at the gentle level of counting Jelly Beans. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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  • Quantify value for management

    - by nivlam
    We have two different legacy systems (window services in this case) that do exactly the same thing. Both of these systems have small differences for the different applications they serve. Both of these system's core functionality lies within a shared library. Most of the time, the updates occur in the shared library and we simply deploy the updated library to both of these systems. The systems themselves rarely change. Since both of these systems do essentially the same thing, our development team would like to consolidate these two systems into a single service. What can I do to convince management to allocate time for such a task? Some of the points I've noted are: Easier maintenance Decrease testing/QA time Unfortunately, this isn't enough. They would like us to provide them with hard numbers on the amount of hours this will save in the future and how this will speed up future development. Since most of the work is done in the shared library and the systems themselves never change, it's hard for us to quantify how many hours this will save. What kind of arguments can I make to justify the extra work to consolidate these systems?

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  • How can you write tests for Selenium (or similar) which don't fail because of minor or cosmetic changes?

    - by Sam
    I've been spending the last week or so learning selenium and building a series of web tests for a website we're about to launch. it's been great to learn, and I've picked up some xpath and css location techniques. the problem for me though, is seeing little changes break the tests - any change to a div, an id, or some autoid number that helps identify widgets breaks any number of tests - it just seems to be very brittle. so have you written selenium (or other similar) tests, and how do you deal with the brittle nature of the tests (or how do you stop them being brittle), and what sort of tests do you use selenium for?

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  • Windows 7 Tips and Tricks: Tweaking the Interface

    By default the look of Windows 7 is an improvement over its predecessors in the Windows operating system lineup. Windows 7 s interface not only looks better it also seems to be more user-friendly with the various features it affords its users. While you can enjoy the latest Windows OS without making any adjustments to it there are plenty of tweaks that can help you change and improve its appearance. This multi-part series will offer up some of the tweaks that you can easily apply to your own PC.... Comcast? Business Class - Official Site Sign Up For Comcast Business Class, Make Your Business a Fast Business

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  • How to build completely modular web applications

    - by Webnet
    In the coming months we're going to begin a project where we take a system we've built for a client (v1) and rebuild it from scratch. Our goal with v2 is to make it modular, so that this specific client will have their own set of modules they use, then another client may use a different set of modules altogether. The trick here is that Company A might have a series of checkout and user modules that change how that system works. Company B might stick with the standard checkout procedure but customize how products are browsed. What are some good approaches to application architecture when you're building an application from scratch that you want to have a Core that's shared among all clients while still maintaining the flexability for anything to be modified specifically for a client? I've seen CodeIgniter's hooks and don't think that's a good solution as we could end up with 250 hooks and it's still not flexible enough. What are some other solutions? Ideally we won't need to draw a line in the sand.

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  • Cursor-Killing: Accessing Data in the Next Row

    Cursors are considered by many to be the bane of good T-SQL. What are the best ways to avoid iterative T-SQL and to write queries that look and perform beautifully? This first part in an ongoing series of cursor-killing handles inter-row analysis. 24% of devs don’t use database source control – make sure you aren’t one of themVersion control is standard for application code, but databases haven’t caught up. So what steps can you take to put your SQL databases under version control? Why should you start doing it? Read more to find out…

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  • Game Changing Features in the Silverlight 5 Beta (Part 3)

    - by mbcrump
    Introduction In the second part of my “Game-changing Features” series, I investigated how to create multiple windows in a trusted Silverlight 5 application. Now, it is time to explore another set of features: SoundEffect Class for Low-Latency, Supporting Double- and Triple-Mouse Clicks and Linked Text Containers.  If you followed my previous tutorial, then you should be ready to get started. The full source code for all three of the projects will be available as a separate download with this article. The full article is hosted on SSWUG and you can access it by clicking here. Don’t forget to rate it and leave comments if you have any problems. Other Resources by Me: My webinar on “Getting started with the Silverlight 5 Beta”. Getting Started with the Silverlight 5 Beta! Game Changing Features in the Silverlight 5 Beta (Part 1) Game Changing Features in the Silverlight 5 Beta (Part 2) Game Changing Features in the Silverlight 5 Beta (Part 3)  Subscribe to my feed

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  • Windows 7 Tips and Tricks: Tweaking the Interface

    By default the look of Windows 7 is an improvement over its predecessors in the Windows operating system lineup. Windows 7 s interface not only looks better it also seems to be more user-friendly with the various features it affords its users. While you can enjoy the latest Windows OS without making any adjustments to it there are plenty of tweaks that can help you change and improve its appearance. This multi-part series will offer up some of the tweaks that you can easily apply to your own PC.... Comcast? Business Class - Official Site Sign Up For Comcast Business Class, Make Your Business a Fast Business

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  • Kernel won't update automatically

    - by Bucic
    My current kernel is 3.2.0-26 (my main computer) while on another of my Ubuntu computers, with which I didn't fiddle with unofficial updates, it's 3.2.0-30. Yet the Update manager on my main computer doesn't show available kernel updates. It shows other updates though. I suspect is due to the fact that in the past I installed multiple mainline kernel versions (not recommended versions), up to 3.5* series. What I'm after: Either: Fix automatic kernel updates. Or: Learn about a way to check for the latest official ubuntu kernel version and get it manually (I know how to install kernels from debs) What I have already tried: Uninstalled unused kernels including "the generic one without a number".

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  • Implementing unit testing at a company that doesn't do it

    - by Pete
    My company's head of software development just "resigned" (i.e. fired) and we are now looking into improving the development practices at our company. We want to implement unit testing in all software created from here on out. Feedback from the developers is this: We know testing is valuable But, you are always changing the specs so it'd be a waste of time And, your deadlines are so tight we don't have enough time to test anyway Feedback from the CEO is this: I would like our company to have automated testing, but I don't know how to make it happen We don't have time to write large specification documents How do developers get the specs now? Word of mouth or PowerPoint slide. Obviously, that's a big problem. My suggestion is this: Let's also give the developers a set of test data and unit tests That's the spec. It's up to management to be clear and quantitative about what it wants. The developers can put it whatever other functionality they feel is needed and it need not be covered by tests Well, if you've ever been in a company that was in this situation, how did you solve the problem? Does this approach seem reasonable?

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  • How can I compute the Big-O notation for a given piece of code?

    - by TheNew Rob Mullins
    So I just took a data structure midterm today and I was asked to determine the run time, in Big O notation, of the following nested loop: for (int i = 0; i < n-1; i++) { for(int j = 0; j < i; j++2) { //1 Statement } } I'm having trouble understanding the formula behind determining the run time. I thought that since the inner loop has 1 statement, and using the series equation of: (n * (n - 1)) / 2, I figured it to be: 1n * (n-1) / 2. Thus equaling (n^2 - 1) / 2. And so I generalized the runtime to be O(n^2 / 2). I'm not sure this is right though haha, was I supposed to divide my answer again by 2 since j is being upped in intervals of 2? Or is my answer completely off?

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  • How to work as a team of two

    - by Ezi
    I work in a team of 2 developers, my partner is the founder of the company, in the beginning he did everything on his own. He hired me about 3 years ago to help him get things done quicker and satisfy our customer needs. Often I get small project to do all by my own, as long as it works great (and it usually does...) he doesn't care much on what I did or how I did it. But if the customer calls him up asking why something doesn't work as expected and I'm not around to forward the call to me, he could get very angry on why he doesn't have an idea on how that program works. I don't keep anything as a secret, if he asks me on something how I did it I'm happy to explain as long as he's willing to listen (which isn't long), but I don't know why I need to say it in first place, in developing software everything is written down clearly. Most of the time I work on projects he wrote and I don't need to ask him anything (it happens maybe once a month that I ask him how something works, just because I don't have the time to look it up). I've read a lot on that great site about small teams that usually means 7-12 people. I couldn't find how 2 people work as a team; we don't have project managers, reviewers or testers. I feel that the fact he don't have time to review the code on his own is not my problem, so the question here is am I doing something rung? I need to walk over to him and give him a lecture on what I did even he doesn't ask me?

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  • SharePoint Search Problem: The start address sps3://server cannot be crawled.

    - by Clara Oscura
    With this post, I'm going to start a series on problems I have encountered with SharePoint search. Error: The start address sps3://luapp105 cannot be crawled. Context: Application 'Search_Service_Application', Catalog 'Portal_Content' Details:  Access is denied. Verify that either the Default Content Access Account has access to this repository, or add a crawl rule to crawl this repository. If the repository being crawled is a SharePoint repository, verify that the account you are using has "Full Read" permissions on the SharePoint Web Application being crawled.   (0x80041205) (Event ID: 14, Task Category: Gatherer) Solution: give appropriate permissions to User Profile Synchronisation Service http://social.technet.microsoft.com/Forums/en-US/sharepoint2010setup/thread/64cdf879-f01e-4595-bc52-15975fefd18d http://www.dotnetmafia.com/blogs/dotnettipoftheday/archive/2010/03/29/how-to-set-up-people-search-in-sharepoint-2010.aspx

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  • Are small amounts of functional programming understandable by non-FP people?

    - by kd35a
    Case: I'm working at a company, writing an application in Python that is handling a lot of data in arrays. I'm the only developer of this program at the moment, but it will probably be used/modified/extended in the future (1-3 years) by some other programmer, at this moment unknown to me. I will probably not be there directly to help then, but maybe give some support via email if I have time for it. So, as a developer who has learned functional programming (Haskell), I tend to solve, for example, filtering like this: filtered = filter(lambda item: included(item.time, dur), measures) The rest of the code is OO, it's just some small cases where I want to solve it like this, because it is much simpler and more beautiful according to me. Question: Is it OK today to write code like this? How does a developer that hasn't written/learned FP react to code like this? Is it readable? Modifiable? Should I write documentation like explaining to a child what the line does? # Filter out the items from measures for which included(item.time, dur) != True I have asked my boss, and he just says "FP is black magic, but if it works and is the most efficient solution, then it's OK to use it." What is your opinion on this? As a non-FP programmer, how do you react to the code? Is the code "googable" so you can understand what it does? I would love feedback on this :) Edit: I marked phant0m's post as answer, because he gives good advice on how to write the code in a more readable way, and still keep the advantages. But I would also like to recommend superM's post because of his viewpoint as a non-FP programmer.

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  • PHP echo query result in Class??

    - by Jerry
    Hi all I have a question about PHP Class. I am trying to get the result from Mysql via PHP. I would like to know if the best practice is to display the result inside the Class or store the result and handle it in html. For example, display result inside the Class class Schedule { public $currentWeek; function teamQuery($currentWeek){ $this->currentWeek=$currentWeek; } function getSchedule(){ $connection = mysql_connect(DB_SERVER,DB_USER,DB_PASS); if (!$connection) { die("Database connection failed: " . mysql_error()); } $db_select = mysql_select_db(DB_NAME,$connection); if (!$db_select) { die("Database selection failed: " . mysql_error()); } $scheduleQuery=mysql_query("SELECT guest, home, time, winner, pickEnable FROM $this->currentWeek ORDER BY time", $connection); if (!$scheduleQuery){ die("database has errors: ".mysql_error()); } while($row=mysql_fetch_array($scheduleQuery, MYSQL_NUMS)){ //display the result..ex: echo $row['winner']; } mysql_close($scheduleQuery); //no returns } } Or return the query result as a variable and handle in php class Schedule { public $currentWeek; function teamQuery($currentWeek){ $this->currentWeek=$currentWeek; } function getSchedule(){ $connection = mysql_connect(DB_SERVER,DB_USER,DB_PASS); if (!$connection) { die("Database connection failed: " . mysql_error()); } $db_select = mysql_select_db(DB_NAME,$connection); if (!$db_select) { die("Database selection failed: " . mysql_error()); } $scheduleQuery=mysql_query("SELECT guest, home, time, winner, pickEnable FROM $this->currentWeek ORDER BY time", $connection); if (!$scheduleQuery){ die("database has errors: ".mysql_error()); // create an array } $ret = array(); while($row=mysql_fetch_array($scheduleQuery, MYSQL_NUMS)){ $ret[]=$row; } mysql_close($scheduleQuery); return $ret; // and handle the return value in php } } Two things here: I found that returned variable in php is a little bit complex to play with since it is two dimension array. I am not sure what the best practice is and would like to ask you experts opinions. Every time I create a new method, I have to recreate the $connection variable: see below $connection = mysql_connect(DB_SERVER,DB_USER,DB_PASS); if (!$connection) { die("Database connection failed: " . mysql_error()); } $db_select = mysql_select_db(DB_NAME,$connection); if (!$db_select) { die("Database selection failed: " . mysql_error()); } It seems like redundant to me. Can I only do it once instead of calling it anytime I need a query? I am new to php class. hope you guys can help me. thanks.

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  • Akka framework support for finding duplicate messages

    - by scala_is_awesome
    I'm trying to build a high-performance distributed system with Akka and Scala. If a message requesting an expensive (and side-effect-free) computation arrives, and the exact same computation has already been requested before, I want to avoid computing the result again. If the computation requested previously has already completed and the result is available, I can cache it and re-use it. However, the time window in which duplicate computation can be requested may be arbitrarily small. e.g. I could get a thousand or a million messages requesting the same expensive computation at the same instant for all practical purposes. There is a commercial product called Gigaspaces that supposedly handles this situation. However there seems to be no framework support for dealing with duplicate work requests in Akka at the moment. Given that the Akka framework already has access to all the messages being routed through the framework, it seems that a framework solution could make a lot of sense here. Here is what I am proposing for the Akka framework to do: 1. Create a trait to indicate a type of messages (say, "ExpensiveComputation" or something similar) that are to be subject to the following caching approach. 2. Smartly (hashing etc.) identify identical messages received by (the same or different) actors within a user-configurable time window. Other options: select a maximum buffer size of memory to be used for this purpose, subject to (say LRU) replacement etc. Akka can also choose to cache only the results of messages that were expensive to process; the messages that took very little time to process can be re-processed again if needed; no need to waste precious buffer space caching them and their results. 3. When identical messages (received within that time window, possibly "at the same time instant") are identified, avoid unnecessary duplicate computations. The framework would do this automatically, and essentially, the duplicate messages would never get received by a new actor for processing; they would silently vanish and the result from processing it once (whether that computation was already done in the past, or ongoing right then) would get sent to all appropriate recipients (immediately if already available, and upon completion of the computation if not). Note that messages should be considered identical even if the "reply" fields are different, as long as the semantics/computations they represent are identical in every other respect. Also note that the computation should be purely functional, i.e. free from side-effects, for the caching optimization suggested to work and not change the program semantics at all. If what I am suggesting is not compatible with the Akka way of doing things, and/or if you see some strong reasons why this is a very bad idea, please let me know. Thanks, Is Awesome, Scala

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  • How to "undo" (revert) Ctrl+L?

    - by zharvey
    I'm on 12.04 Desktop. When browsing the file system, it's convenient to type Ctrl+L so as to get the file path "Location" to render as a string; I can then modify the file path or even paste something in and get redirected right where I want to go. But often, after typing Ctrl+L, I find myself wanting to revert back to the normal way Nautilus renders the file path (as a series of buttons/links). What's the magical shortcut to "undo" Ctrl+L and go back to "normal mode"? Thanks in advance!

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  • laptop screen goes blank after waking from sleep

    - by Tojo Chacko
    I have been facing this issue from the last week after some update. Whenever my laptop wakes up from suspend state it just shows me a blank screen. Regardless of whatever I do(move my mouse, press keyboard buttons) it just refuses to wake up. I am forced to do a restart and lose all my unsaved files. Has this issue been reported for Ubuntu 12.04? I am using a Lenovo X200 with Intel Mobile 4 Series Graphics Chipset. Please let me know if any body has found a fix for this.

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