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Articles indexed Friday October 19 2012

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• Why CFOs Should Care About Big Data

  - by jmorourke

  The topic of “big data” clearly has reached a tipping point in 2012.  With plenty of coverage over the past few years in the IT press, we are now starting to see the topic of “big data” covered in mainstream business press, including a cover story in the October 2012 issue of the Harvard Business Review.  To help customers understand the challenges of managing “big data” as well as the opportunities that can be created by leveraging “big data”, Oracle has recently run and published the results of a customer survey, as well as white papers and articles on this topic.  Most recently, we commissioned a white paper titled “Mastering Big Data: CFO Strategies to Transform Insight into Opportunity”. The premise here is that “big data” is not just a topic that CIOs should pay attention to, but one that CFOs should understand and take advantage of as well.  Clearly, whoever masters the art and science of big data will be positioned for competitive advantage in their industries or markets.  That’s why smart CFOs are taking control of big data and business analytics projects, not just to uncover new ways to drive growth in a slowing global economy, but also to be a catalyst for change in the enterprise.  With an increasing number of CFOs now responsible for overseeing IT investments and providing strategic insight to the board, CFOs will be increasingly called upon to take a leadership role in assessing the value of “big data” initiatives, building on their traditional skills in reporting and helping managers analyze data to support decision making. Here’s a link to the white paper referenced above, which is posted on the Oracle C-Central/CFO web site, as well as some other resources that can help CFOs master the topic of “big data”: White Paper “Mastering Big Data:  CFO Strategies to Transform Insight into Opportunity CFO Market Watch article:  “Does Big Data Affect the CFO?” Oracle Survey Report:  “From Overload to Impact – An Industry Scorecard on Big Data Industry Challenges” Upcoming Big Data Webcast with Andrew McAfee Here’s a general link to Oracle C-Central/CFO in case you want to start there: www.oracle.com/c-central/cfo Feel free to contact me if you have any questions or need additional information:  [email protected]

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• Is the using of dirname(__FILE__) a good practice?

  - by webose

  looking at the code of Joomla I see that in the first line of the index, it defines the base path of installation with the dirname(FILE) is this a font of possible risk for the site, I mean if a non controlled error message show the internal path of the Joomla directory, because of, for example a failed include, can it be used to perform some kind of attack to the site ? If yes, is it convenient to use this function ? Any idea is welcome. Thanks

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• How best to implement HTML5 support for my validation library

  - by Vivin Paliath

  I have created an annotation-based validation library called regula. There seems to be some amount of interest around the framework and the next thing I'd like to do is to support HTML5 validation. Originally I figured that I would check to see if the browser supported the HTML5 validation that has been specified and to either emulate or delegate to built-in regula equivalents. This is trivial for things like required, but once you start getting into the date-validation, it gets tricky (date widgets, localization, etc.). So I have a few options in front of me: Full HTML5 Shim along with widgets (for date stuff etc.): I feel like this is overkill and essentially reinventing the wheel since this is already covered by things like modernizr. Use HTML5 validation if available (either native, or provided by shim; otherwise ignore): What this means is that if HTML5 validation is available (natively or through a shim) I will use it, otherwise I will ignore it. I'm leaning towards the latter since currently if someone wants to use HTML5 validation, they will most probably require a shim since not all browsers support HTML5. Which option do you think is better?

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• How to implement string matching based on a pattern

  - by Vincent Rischmann

  I was asked to build a tool that can identify if a string match a pattern. Example: {1:20} stuff t(x) {a,b,c} would match: 1 stuff tx a 20 stuff t c It is a sort of regex but with a different syntax Parentheses indicate an optional value {1:20} is a interval; I will have to check if the token is a number and if it is between 1 and 20 {a,b,c} is just an enumeration; it can be either a or b or c Right now I implemented this with a regex, and the interval stuff was a pain to do. On my own time I tried implementing some kind of matcher by hand, but it turns out it's not that easy to do. By experimenting I ended up with a function that generates a state table from the pattern and a state machine. It worked well until I tried to implement the optional value, and I got stuck and how to generate the state table. After that I searched how I could do this, and that led me to stuff like LL parser, LALR parser, recursive-descent parser, context-free grammars, etc. I never studied any of this so it's hard to know what is relevant here, but I think this is what I need: A grammar A parser which generates states from the grammar and a pattern A state machine to see if a string match the states So my first question is: Is this right ? And second question, what do you recommend I read/study to be able to implement this ?

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• Is it correct to add booleans in order to count the number of true values in a vector?

  - by gerrit

  Is it conceptually correct to sum a vector of booleans? From a mathematical point of view, I would argue it's not: True + True != 2. But it's quite practical to do so still! Example using the vectorised Python library numpy: In [1]: X = rand(10) In [2]: large = X>0.6 In [3]: large.dtype Out[3]: dtype('bool') In [4]: large.sum() Out[4]: 7 I don't like it, but it's very practical. Is this a good practice? Update: the aim is to count the number of true values in a vector.

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• Classless tables possible with Datamapper?

  - by barerd

  I have an Item class with the following attributes: itemId,name,weight,volume,price,required_skills,required_items. Since the last two attributes are going to be multivalued, I removed them and create new schemes like: itemID,required_skill (itemID is foreign key, itemID and required_skill is primary key.) Now, I'm confused how to create/use this new table. Here are the options that came to my mind: 1) The relationship between Items and Required_skills is one-to-many, so I may create a RequiredSkill class, which belongs_to Item, which in turn has n RequiredSkills. Then I can do Item.get(1).requiredskills. This sounds most logical to me. 2) Since required_skills may well be thought of as constants (since they resemble rules), I may put them into a hash or gdbm database or another sql table and query from there, which I don't prefer. My question is: is there sth like a modelless table in datamapper, where datamapper is responsible from the creation and integrity of the table and allows me to query it in datamapper way, but does not require a class, like I may do it in sql?

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• How does ReSharper V7 compares against V5? [closed]

  - by Alex. S.

  I was told by my boss we need to buy some more licenses of ReSharper and getting the quote of that we also received the quote of an upgrade to the newest version (v7) for everyone here. We are a small shop of 20 C# developers working with VS2010 We previously were working with an older version (v5) so I wondered what are the key differences between both versions, from a practical point of view, because the upgrade fee is greater than zero. I reviewed the website and of course it seems interesting, and I'm looking for arguments if it's a worthwhile investment upgrade.

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• Help with correct php syntax [migrated]

  - by Robert hue

  I was working on some php functions and I got confused with php syntax. Here is the function. Is this correct? to use add_filter inside function_exists check if ( ! function_exists( 'disable_password_reset' ) ) : function disable_password_reset() { return false; } add_filter ( 'allow_password_reset', 'disable_password_reset' ); endif; or this one is correct, to use add_filter outside function_exists check if ( ! function_exists( 'disable_password_reset' ) ) : function disable_password_reset() { return false; } endif; add_filter ( 'allow_password_reset', 'disable_password_reset' ); I was working on Wordpress if that matters.

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• Avoiding duplicate bug reports

  - by Jaakko Seppälä

  I use Linux and other open source software in my home. As I'm not a professional coder, I usually report bugs to developers as my skills are not enough to solve problems on my own. What kind of things you want me to check before I send a bug report? I mean, once I thought I found a bug in Gedit and I couldn't find similar bug in Bugzilla. But after I sent the report, some developer said that the bug is already in Bugzilla as the bug was in GTK+, not in Gedit. Sometimes it might be hard for an amateur to guess whether some previously known bug would solve the issue I found.

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• Is it okay to define a [] method in ruby's NilClass?

  - by Silasj

  Ruby by default does not include the method [] for NilClass For example, to check if foo["bar"] exists when foo may be nil, I have to do: foo = something_that_may_or_may_not_return_nil if foo && foo["bar"] # do something with foo["bar"] here end If I define this method: class NilClass def [](arg) nil end end Something like that would make this possible, even if foo is nil: if foo["bar"] # do something with foo["bar"] end Or even: if foo["bar"]["baz"] # do something with foo["bar"]["baz"] here end Question: Is this a good idea or is there some reason ruby doesn't include this functionality by default?

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• What are the pros and cons of public sector vs private sector software development? [closed]

  - by j.i.h.

  I'm currently considering a job working for my state of residence. However, besides the obvious drawback of far less compensation than I could get in the private sector, are there any other drawbacks? Are there any upsides to public work, besides helping society at large and benefits? My main concern is that if I work in the public sector, I might be stained with the perception that I "got along" in an uncompetitive environment. I have no idea if this would be the actual environment, but it seems to be the preconception about government work--unionized workers who are simply there because the union keeps them from being fired. So, does anyone have experience working for the government? Do you have experiences working with people transitioning from public to private sector?

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• How to convince the agile product owner to change their mind? [closed]

  - by Joshiatto

  A friend of a friend ran into a situation recently in which the agile product owner specified features down to exactly what every single user click should look like. The problem is, the dev team has already figured out a way to accomplish the business value in fewer clicks (better UX), but in the past, questioning the product owner has led to career disaster. How do we convince the product owner to change their mind and go along with our recommendation? What can be done within the agile model to fix this situation and how do we accomplish it? On a bigger level: What can be done to make agile product owners better at their job to prevent this kind of thing from happening?

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• Basics of Website development [closed]

  - by user975234

  I have read this post: What should every programmer know about web development? but I have some more questions... I will be developing a content related website very soon and I am confused about some technology stuff. I am thinking about developing the site using ruby on rails. So when I'll be buying hosting, do I need to ask for something special? Like for example, we need to specify what kind of hosting we need, windows or linux. So for ruby on rails do I need some extra facilities from the hosting provider? Is ruby on rails a good choice for a large content related website? This may be a bit stupid but how do I choose my backend, scripting languages etc? Thing is I am really new to website development. And the flow of making websites is not clear. Any links will be helpful. EDIT: I know this question has been voted as non constructive. But if any one still has some precise knowledge about how the flow of website development goes, please comment your views.. That will be helpful!

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• What is the Big-O time complexity of this algorithm

  - by grebwerd

  I was wondering what the run time of this small program would be? #include <stdio.h> int main(int argc, char* argv[]) { int i; int j; int inputSize; int sum = 0; if(argc == 1) inputSize = 16; else inputSize = atoi(argv[i]); for(i = 1; i <= inputSize; i++){ for(j = i; j < inputSize; j *=2 ){ printf("The value of sum is %d\n",++sum); } } } n S floor(log n - log (n-i)) = ? i =1 and that each summation would be the floor value between log(n) - log(n-i). Would the run time be n log n?

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• Should HTTP Verbs Be Used Semantically?

  - by Xophmeister

  If I'm making a web application which integrates with a server-side backend, would it be considered best practice to use HTTP methods semantically? That is, for example, if I'm fetching data (e.g., to populate a menu, etc.), I would use GET, but to update data (e.g., save a record), I would use POST. (I realise there are other methods that may be even more appropriate, but we need to consider browser support.) I can see the benefits of this in the sense that it's effectively a RESTful API, but at a slightly increased development cost. In my previous projects, I've POST'd everything: Is it worth switching to a RESTful mindset simply for the sake of best practice?

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• Display settings changes automatically with dual monitors in 12.04 and 12.10 AMD

  - by Johan Hovda

  Dual monitors works fine, except that the settings suddenly change. This happens very often, sometimes several times in a few minutes. It is very irritating having to set the settings again each time. Suddenly mirroring is set to on, sometimes the monitor switch places (from left to right and so on), and most of the times the screen resolutions are also changed. I use Gnome Shell. I have tried unity with the same result. I use an open driver. I have earlier used fglrx, with some better results (still happens, but not so often), but can't install it sucsessfully after upgrading to ubuntu 12.10. I know there is a similar question about this issue, but it's not answered. I hope someone can help me.

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• Issue installing FLEXnet on ubuntu for program: Geneious

  - by jon_shep

  Afternoon, I can successful in my Geneious Pro software but when I am required to have FLEXnet installed for the licensing process. The prompt I am given is : To install FLEXnet on Linux, run the following command from your shell as root: /home/shep/Geneious/licensing_service/install_fnp.sh "/home/shep/Geneious/licensing_service/linux64/FNPLicensingService" When you have done this, you can activate your license in Geneious. As Root: root@Jon:/home/shep/Geneious/licensing_service# sh install_fnp.sh Unable to locate anchor service to install, please specify correctly on command line also root@Jon:/home/shep/Geneious/licensing_service/linux64# sh FNPLicensingService FNPLicensingService: 2: FNPLicensingService: Syntax error: Unterminated quoted string Anyone have further ideas? I tried to find the software online directly, that was no good either. ~Jon

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• Unable to boot post upgade to 12.10 from 12.04 on a dial boot PC

  - by Prateek

  I have a dual boot PC with Win7 and Ubuntu. Last night I upgraded from 12.04 to 12.10 and since then I have not been able to boot and PC goes into grub rescue with error "File not found" I have tried the below steps set prefix=(hd0,msdos5)/boot/grub/i386-pc/ set root=(hd0,msdos5) insmod normal ( i get error symbol not found : 'grub_disk_dev_list'. when I try linux /boot/vmlinuz-3.2.0-32-generic root=/dev/sda5 ro (i get error - command not found 'linux' ) same for initrd I am not able to find out what sdXX to set also.

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• Internal speakers do not work

  - by Nikcefo

  I have a new (from scratch, not update) installation of Ubuntu 12.10 on my notebook, Asus A3Ac (It is based on Intel Centrino - Pentium M with full duplex Intel HDA codec). In older versions of Debian-based systems Intel HDA audio didn't work correctly. Alsamixer display wrong outputs and inputs (more than notebook really have). In clean installations internal speakers were playing, but they didn't mute when headphones was plugged in. There was a solution (propably not the best but working) - edit as root /etc/modprobe.d/alsa-base.conf and add a line "options snd-hda-intel model=z71v position_fix=1". After restart it worked correctly (alsamixer displayed correct devices and internal speakers were muted after I plugged in headphones). It was also working in Ubuntu 12.04. In Ubuntu 12.10 I have another problem. The alsamixer in default (don't have to edit alsa-base.conf) display correct outputs and inputs but internal speakers don't working if the headphones isn't plugged in. I have to manually disable "Auto-Mut" option in alsamixer, then the internal spakers works (but of course they don't mute when the headphones are pluged in). Thanks for any idea how to fix it. I'm not sure if it is a bug or it's caused by a "specific hardware". Tomas

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• Partitioning a 128GB SSD and 500GB HDD

  - by Gladen

  So I have a 128GB SSD and 500GB HDD. I want to reïnstall my laptop and put Ubuntu 12.10 on this setup. I already looked around on the internet and came up with this partitioning schema: about 2GB of swap on the SSD (I got 4GB of RAM in my laptop) / using the rest of that space /home on the HDD So I was wondering, are there any better schemes or extra partitions that I should consider putting on a particular drive? Thanks in advance! :)

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• Unity Dash and top toolbar won't open after updating to 12.10

  - by pgrytdal

  Today, I updated to Ubuntu 12.10. After re-starting, like the updater suggested, the toolbar on the top of the screen, and the dash won't load. I seem to be missing other features, as well, like alttab to switch windows, etc. I am able to access the Terminal, by typing CtrlAltT, which is how I was bale to access Firefox. How do I fix this problem? Edit: 2:10 PM on 10/19/12 As Chris Carter suggested, I'm including the results of the teminal command lspci (Sorry... I dont know how to format between Back-tics): 00:00.0 Host bridge: Advanced Micro Devices [AMD] RS780 Host Bridge 00:01.0 PCI bridge: Acer Incorporated [ALI] AMD RS780/RS880 PCI to PCI bridge (int gfx) 00:04.0 PCI bridge: Advanced Micro Devices [AMD] RS780/RS880 PCI to PCI bridge (PCIE port 0) 00:06.0 PCI bridge: Advanced Micro Devices [AMD] RS780 PCI to PCI bridge (PCIE port 2) 00:07.0 PCI bridge: Advanced Micro Devices [AMD] RS780 PCI to PCI bridge (PCIE port 3) 00:11.0 SATA controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 SATA Controller [AHCI mode] 00:12.0 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB OHCI0 Controller 00:12.1 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0 USB OHCI1 Controller 00:12.2 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB EHCI Controller 00:13.0 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB OHCI0 Controller 00:13.2 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB EHCI Controller 00:14.0 SMBus: Advanced Micro Devices [AMD] nee ATI SBx00 SMBus Controller (rev 3a) 00:14.2 Audio device: Advanced Micro Devices [AMD] nee ATI SBx00 Azalia (Intel HDA) 00:14.3 ISA bridge: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 LPC host controller 00:14.4 PCI bridge: Advanced Micro Devices [AMD] nee ATI SBx00 PCI to PCI Bridge 00:18.0 Host bridge: Advanced Micro Devices [AMD] Family 11h Processor HyperTransport Configuration (rev 40) 00:18.1 Host bridge: Advanced Micro Devices [AMD] Family 11h Processor Address Map 00:18.2 Host bridge: Advanced Micro Devices [AMD] Family 11h Processor DRAM Controller 00:18.3 Host bridge: Advanced Micro Devices [AMD] Family 11h Processor Miscellaneous Control 00:18.4 Host bridge: Advanced Micro Devices [AMD] Family 11h Processor Link Control 01:05.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI RS780M/RS780MN [Mobility Radeon HD 3200 Graphics] 01:05.1 Audio device: Advanced Micro Devices [AMD] nee ATI RS780 HDMI Audio [Radeon HD 3000-3300 Series] 03:00.0 Ethernet controller: Broadcom Corporation NetLink BCM5784M Gigabit Ethernet PCIe (rev 10) 09:00.0 Network controller: Atheros Communications Inc. AR928X Wireless Network Adapter (PCI-Express) (rev 01)

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• How would I broadcast a subdomain/virtual name on a local server with people connected to the same network

  - by Sarmen B.

  I have a server connected to the router which has ubuntu 12.04. It is has apache/mysql/php all installed ready to go. the folder structure is like this: /var/www -- this isnt the root -/libs -/logs -/public - this is the root -/vhosts - all subdomains go here I have a folder in vhosts named mysite. I went into /etc/apache2/sites-available and created a file and here are the contents - (vhost file). and I also added an entry in /etc/hosts file containing: 127.0.1.1 mysite.dev and I also did sudo a2ensite mysite i tried accessing the site from a computer via mysite.dev and our public ip into the server but i was not able to view it. the public directory in the structure above does display on all computers when i try our public ip. but for anything added in vhosts the site wont show. there is no domain attached its just our ip. I tried changing the port from 80 to say 9999 in the mysite file in sites-available and tried myip:9999 but that didnt work either. what am I doing wrong? edit: i forgot to mention that the server is dmzed on the router.

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• Pandaboard crash on startup or freeze after minutes

  - by Meach

  I just received my Pandaboard ES (rev B) and I am having trouble after installing ubuntu-omap4-addons. Once I copied the image ubuntu-12.04-preinstalled-desktop-armhf+omap4.img on my sd card and boot the pandaboard with it, I run the following commands: sudo add-apt-repository ppa:tiomap-dev/release sudo apt-get update sudo apt-get dist-upgrade sudo apt-get install ubuntu-omap4-extras At the end of the installation of ubuntu-omap4-extras, Ubuntu tells me that a problem occurs when the console displays: ldconfig deferred processing now taking place Clicking on "report the problem" tell me that the problem concerns pvr-omap4-dkms. I read somewhere that this can happen and it is better to reinstall pvr-omap4-dkms. Which I am doing by running: sudo apt-get install --reinstall pvr-omap4-dkms I reboot. Then the board has sometimes difficulties to start Ubuntu: it freezes during the loading page, only action I can do is unplugging the board to start it again. Some other times, Ubuntu load successfully but then freeze at another random time, in the range 20 - 40 minutes. I searched on internet for similar bug and found this: https://bugs.launchpad.net/ubuntu/+source/linux-ti-omap4/+bug/971091 So I typed this in: update-rc.d ondemand disable apt-get -y install cpufrequtils echo 'ENABLE="true" GOVERNOR="performance" MAX_SPEED="0" MIN_SPEED="0"' > /etc/default/cpufrequtils cpufreq-set -r -g performance reboot But it doesn't seems to fix the bug. Another detail: on startup, before the loading screen of Ubuntu (when there is the two penguins displayed :)), it shows this: [0.297271] CPU1: Unknown IPI message 0x1 [0.308990] omap_hwmod: mcpdm: _wait_target_ready error: -16 [0.354705] omap_mux_get_by_name: Could not find signal uart1_cts.uart1_cts [0.354766] omap_hwmod_mux_init: Could not allocate device mux entry [2.107086] thermal_get_slope:Getting slope is not supported for domain gpu [2.107116] thermal_get_offset:Getting offset is not supported for domain gpu [2.107299] stm_fw: vendor driver stm_ti1.0 registered [8.725555] OMAPRPC: Registration of OMAPRPC rpmsg service returned 0! debug=0 Any idea what can be wrong? I am not that good with Ubuntu so any help will be appreciated. Cheers! Meach

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• can't install libcairo2-dev under ubuntu 12.04

  - by Adrian Serafin

  I'm trying to install libcairo2-dev package on ubuntu 12.04. The error message is as follows: requires: libcairo2 (= 1.10.2-6.1ubuntu2) but 1.10.2-6.1ubuntu3 is about to be installed requires: libcairo-gobject2 (= 1.10.2-6.1ubuntu2) but 1.10.2-6.1ubuntu3 is about to be installed requires: libglib2.0-dev but it won't be installed Don't really know what to do next, tried googling but with no luck :(

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• ubuntu-12.04-wubi-i386.tar.xz for the wubi installer

  - by Alejandro

  I ran the wubi installer (from an extracted ubuntu ISO) and it downloads ubuntu-12.04-wubi-i386.tar.xz but it's slow and non-resumable so I cancelled it, found a mirror of the file online and downloaded it using Intenet download manager. Where should I be placing ubuntu-12.04-wubi-i386.tar.xz file so the wubi installer won't have to download that file anymore? Thank you. Update: I extracted the archive and there are two files, I'm afraid I do not know where to place them.

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