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  • Why is C++ backward compatibility important / necessary?

    - by Giorgio
    As far as understand it is a well-established opinion within the C++ community that C is an obsolete language that was useful 20 years ago but cannot support many modern good programming practices, or even encourages bad practices; certain features that were typical of C++ (C with classes) during the nineties are also obsolete and considered bad practice in modern C++ (e.g., new and delete should be replaced by smart pointer primitives). In view of this, I often wonder why backward compatibility with C and obsolete C++ features is still considered important: to my knowledge there is no 100% compatibility, but most of C and C++ are contained in C++11 as a subset. Of course, there is a lot of legacy code and libraries (possibly containing templates) that are written using a previous standard of the language and which still need to be maintained or used in connection with new code. Nevertheless, maybe it would still be possible to drop obsolete C and C++ features (e.g. the mentioned new / delete) from a future C++ standard so that it is impossible to use them in new code. In this way, old and dangerous programming practices would be quickly banned from new code, and modern, better programming practices would be enforced by the compiler. Legacy code could still be maintained using separate compilation (having C alongside C++ source files is already a common practice). Developers would have to choose between one compiler supporting the old-style C++ that was common during the nineties and a compiler supporting the modern C++? style (the question mark indicates a future, hypothetical revision). Only mixing the two styles would be forbidden. Would this be a viable strategy for encouraging the adoption of modern C++ practices? Are there conceptual reasons or technical problems (e.g. compiling existing templates) that make such a change undesirable or even impossible? Has such a development been proposed in the C++ community. If there has been some extended discussion on the topic, is there any material on-line?

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  • Boot failure on installation from a burned iso image

    - by jdamae
    I'm encountering boot failure while trying to install a Linux distro from a CD. I'm using an older PC; here are its specs: HP Pavilion a255c 2.66GHz CPU, 512MB RAM with a BIOS revision of 6/30/2003 I reclaimed an older drive (Seagate ST340810A) that seems to be working, as it's recognized in the BIOS (auto-detected). So this is not the original HDD, but a replacement. I downloaded a mini.iso of Ubuntu 10.10 that I want to install, and burned the image to a CD for install. My boot sequence is: First Boot Device [CDROM]. I disabled devices 2-4 so I can just force it to read first from the CD-ROM. This old PC also has a separate CD writer which is a Sec.Slave. The Sec.Master is the Toshiba DVD/ROM DSM-171 drive where I placed the burned Linux CD. With these settings I cannot get it to boot. I get the message "DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER" when I start the pc with the cd (burned iso image). Would I be able to boot off a usb flash drive? Would that work?

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  • Davicom Semiconductor, Inc. 21x4x DEC-Tulip not detected by Wireshark but IP operational

    - by deepsix86
    Recently flipped to Ubuntu 11.10 on a Dell 4300 (Intel). Getting IP address and no issues (ping/surf) but Wireshark unable to detect eth0 interface. I see references in forums to blacklist tulip but looks like I am running dmfe. Not sure if the blacklist is required and where to go from here. Maybe Driver update? Got a little lost looking in that area. Some h/w details below (IP/MAC/HOSTNAME removed) Linux xxxxxx 3.0.0-17-generic #30-Ubuntu SMP Thu Mar 8 17:34:21 UTC 2012 i686 i686 i386 GNU/Linux network-admin (HOSTS TAB) does not list eth0, only loopback and bunch of IPv6 interfaces ifconfig eth0 Link encap:Ethernet HWaddr xxxxxxxx inet addr:192.168.x.xx Bcast:192.168.2.255 Mask:255.255.255.0 inet6 addr: xxxxxxxxxxx 64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:36662 errors:0 dropped:1 overruns:0 frame:0 TX packets:24975 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:42115779 (42.1 MB) TX bytes:3056435 (3.0 MB) Interrupt:18 Base address:0xe800 lspci 02:09.0 Ethernet controller: Davicom Semiconductor, Inc. 21x4x DEC-Tulip compatible 10/100 Ethernet (rev 31) Subsystem: Device 4554:434e Flags: bus master, medium devsel, latency 64, IRQ 18 I/O ports at e800 [size=256] Memory at fe1ffc00 (32-bit, non-prefetchable) [size=256] Expansion ROM at fe200000 [disabled] [size=256K] Capabilities: [50] Power Management version 2 Kernel driver in use: dmfe Kernel modules: dmfe hwinfo --netcard 20: PCI 209.0: 0200 Ethernet controller [Created at pci.318] Unique ID: rBUF.0NgK5ZS9c0D Parent ID: 6NW+.siohrLUzzI4 SysFS ID: /devices/pci0000:00/0000:00:1e.0/0000:02:09.0 SysFS BusID: 0000:02:09.0 Hardware Class: network Model: "Davicom 21x4x DEC-Tulip compatible 10/100 Ethernet" Vendor: pci 0x1282 "Davicom Semiconductor, Inc." Device: pci 0x9102 "21x4x DEC-Tulip compatible 10/100 Ethernet" SubVendor: pci 0x4554 SubDevice: pci 0x434e Revision: 0x31 Driver: "dmfe" Driver Modules: "dmfe" Device File: eth0 I/O Ports: 0xe800-0xe8ff (rw) Memory Range: 0xfe1ffc00-0xfe1ffcff (rw,non-prefetchable) Memory Range: 0xfe200000-0xfe23ffff (ro,non-prefetchable,disabled) IRQ: 18 (61379 events) HW Address: 00:08:a1:01:35:70 Link detected: yes Module Alias: "pci:v00001282d00009102sv00004554sd0000434Ebc02sc00i00" Driver Info #0: Driver Status: dmfe is active Driver Activation Cmd: "modprobe dmfe" Config Status: cfg=new, avail=yes, need=no, active=unknown Attached to: #11 (PCI bridge)

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  • CodePlex Daily Summary for Saturday, May 29, 2010

    CodePlex Daily Summary for Saturday, May 29, 2010New ProjectsASP.NET MVC Time Planner: ASP.NET MVC based time planner is example solution that introduces ASP.NET MVC, MSSQL AJAX and jQuery development.Blit Scripting Engine: Blit Scripting Engine provides developers using Microsofts XNA Framework the ability to implement a scripting solution to their games and other pro...Expression Evaluator: This is an article on how to build a basic expression evaluator. It can evaluate any numerical expression combined with trigonometric functions for...Log Analyzer: This project has the aim to help developers to see live log/trace from their application applying visual styles to the grabbed text.LParse: LParse is a monadic parser combinator library, similar to Haskell’s Parsec. It allows you create parsers on C# language. All parsers are first-clas...NeatHtml: NeatHtml™ is a highly-portable open source website component that displays untrusted content securely, efficiently, and accessibly. Untrusted conte...NeatUpload: The NeatUpload ™ ASP.NET component allows developers to stream uploaded files to storage (filesystem or database) and allows users to monitor uplo...NSoup: NSoup is a .NET port of the jsoup (http://jsoup.org) HTML parser and sanitizer originally written in Java. jsoup originally written by Jonathan He...Ordering: c# farm softwarephone7: Project for Windows Phone 7RestCall: A very simple library to make a simple REST call and deserialize to an object. It uses WCF REST Starter Kit and the .net serializer in: System.Runt...SCSM CSV Connector: CSV Connector allows you to specify a data file and mapping location and a scheuled interval in minutes. At each scheduled interval Service Manage...Silverlight Adorner Control: An Adorner is a custom FrameworkElement that is bound to a FrameworkElement and displays information about that element 'above' the element without...Simple Stupid Tools: Simple Stupid ToolsSQScriptRunner: Simple Quick Script Runner allows an administrator to run T-SQL Scripts against one or more servers with common characteristics. For example, an m...ssisassembly: ssisassemblySSRS Report RoboCopy: a tools used to pass a report from a server to anotherTeam Foundation Server Explorer: A standalone Team Foundation Server explorer that can be used to view and manage source files.New Releases(SocketCoder) Full Silverlight Web Video/Voice Conferencing: SocketCoderWebConferencingSystem_Compiled: Installing The Server: 1- before you start you should allow the SocketCoderWCService.MainService.exe service to use the TCP ports from 4528 to 4532...ASP.NET MVC Time Planner: MVC Time Planner - v0.0.1.0: First public alpha of MVC Time Planner is now available. I got a lot of letters from my ASP.NET blog readers who are interested in this example sol...AvalonDock: AvalonDock 1.3.3384: Welcome to AvalonDock 1.3 This is the new version of AvalonDock targetting .NET 4 These are the main features that are included: - Target Microso...Blit Scripting Engine: Blit Scripting Engine 1.0: This marks the initial release of the Blit Scripting Engine. It provides the ability to compile scripts to an assembly, load pre-compiled assemblie...Community Forums NNTP bridge: Community Forums NNTP Bridge V12: Release of the Community Forums NNTP Bridge to access the social and anwsers MS forums with a single, open source NNTP bridge. This release has add...Community Forums NNTP bridge: Community Forums NNTP Bridge V13: Release of the Community Forums NNTP Bridge to access the social and anwsers MS forums with a single, open source NNTP bridge. This release has add...CSharp Intellisense: V2.4: bug fix: Pascal Casing, Single Selection and other selection errorsExpression Evaluator: Expression Evaluator - Visual Studio 2010: Visual Studio 2010 VersionFacebook Graph Toolkit: Preview 2: Preview 2 updates the source to be much more like the Facebook PHP-SDK. Additionally, the code has been updated to follow StyleCop framework rules....Facebook Graph Toolkit: Preview 3: Rest API now working although not fully tested. Removed JsonObject and JsonArray custom dynamic objects in favor of standard ExpandoObject and List...Free Silverlight & WPF Chart Control - Visifire: Visifire SL and WPF Charts v3.1.1 beta Released: Hi, Today we are releasing the two most awaited features i.e, Logarithmic axis and auto update of y-axis while Scrolling and Zooming. * Logar...Free Silverlight & WPF Chart Control - Visifire: Visifire SL and WPF Charts v3.5.4 beta Released: Hi, Today we are releasing the two most awaited features i.e, Logarithmic axis and auto update of y-axis while Scrolling and Zooming. Logarithmic...Fulcrum: Fulcrum 1.0: Initial release.Git Source Control Provider: V 0.3: V 0.3 Add automatic status refresh when files in solution folder changedIBCSharp: IBCSharp 1.04: What IBCSharp 1.04.zip unzips to: http://i50.tinypic.com/205qofl.png IBCSharp Change Log 1.04 - 5/28/2010 Updated IBClient.dll to IB API version...MapWindow6: MapWindow 6.0 May 28 2010: This shifts the projection library to System.Spatial.Projections instead of MWProj4. This also fixes a meter/feet conversion error.Microsoft Health Common User Interface: Release 8.2.51.000: This is version 8.2 of the Microsoft® Health Common User Interface Control Toolkit. This release includes code updates to controls as listed below....NeatHtml: NeatHtml-trunk.221: Adds support for Internet Explorer Mobile 6.NeatUpload: NeatUpload-1.3.25: Fixes the following bugs: SWFUpload.swf could not be served by a CDN because it was embedded without setting allowScriptAccess="always". NeatUpl...NSoup: NSoup 0.1: Initial port release. Corresponds to jsoup version 0.3.1.Numina Application/Security Framework: Numina.Framework Core 53265: Visit http://framework.numina.net to help get you started.Nuntio Content: Nuntio Content 4.2.0: This upgrades MagicContent instances to the latest version that is now called NuntioContent. While this release is quite stable it is still marked ...patterns & practices: Composite WPF and Silverlight: ProjectLinker Source for VS2010 - May 2010: The ProjectLinker helps keep the source for two projects in sync by automatically creating a linked file in one project as files are added in anoth...phone7: Prism for WP7: This the first version of prism for wp7SCSM CSV Connector: SCSM CSV Connector Version 0.1: Release Notes This is the first release of the SCSM CSV Connector solution. It is an 'alpha' release and has only been tested by the developers on ...Silverlight Adorner Control: 1.0: Initial releaseSilverlight Web Comic: Comic 1.1.1: Comic Beta with functionality to button newSilverlight Web Comic: Web Comic 1.1: This version has a little implementation no visible about the future versions, options to new, save, and load. The next version has a better review...Simple.NET: Simple.Mocking 1.0.0.6: Initial version of a new mocking framework for .NET Revision 1: Expect.AnyInocationOn<T>(T target) changed to Expect.AnyInocationOn(object target...Sonic.Net: Sonic.Net v1.0.1 For Unity 2.0: This Version is a port to VS2010 of the codebase with support for unity 2.0. note: currently follows the xsd schema of the previous unity Configur...Squiggle - A Free open source Lan Messenger: Squiggle 1.0.2: v1.0 Release.Team Foundation Server Explorer: Beta 1: The first public beta release of the TFS Explorer.thinktecture WSCF.blue: WSCF.blue V1 Update (1.0.8): Bug fix release with the following fix: When an XmlArrayAttribute decorated member has IsNullable=false, and the List<T> or Collection option is s...VCC: Latest build, v2.1.30528.0: Automatic drop of latest buildVisual Studio 2010 AutoScroller Extension: AutoScroller v0.4: A Visual studio 2010 auto-scroller extension. Simply hold down your middle mouse button and drag the mouse in the direction you wish to scroll, fu...WatchersNET CKEditor™ Provider for DotNetNuke: CKEditor Provider 1.10.03: !!Whats New Added CKEditor 3.3 Revision 5542 changes Options: Default Toolbar Set to Full for Administrators Browser Window: Increased Size of ...Most Popular ProjectsRawrWBFS ManagerAJAX Control ToolkitMicrosoft SQL Server Product Samples: DatabaseSilverlight ToolkitWindows Presentation Foundation (WPF)patterns & practices – Enterprise LibraryMicrosoft SQL Server Community & SamplesPHPExcelASP.NETMost Active ProjectsAStar.netpatterns & practices – Enterprise LibraryBlogEngine.NETGMap.NET - Great Maps for Windows Forms & PresentationCommunity Forums NNTP bridgeRawrSqlServerExtensionsCustomer Portal Accelerator for Microsoft Dynamics CRMPAPpatterns & practices: Windows Azure Security Guidance

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  • SDLC/Deployment/Documentation ERP/framework that minimizes developer misery

    - by foampile
    I was wondering if there are favorite SDLC/Deployment/Documentation/Versioning ERP/frameworks that work with popular SDLC methodologies, such as Agile, that minimize developer exposure to what most programmer hate to do most -- PAPERWORK ? Often, release management is extremely inefficient and there is a lot of data duplication across documents that are required to accompany changes -- e.g. when submitting a deployment request, I must list all files and their revisions from source control -- but why is that necessary if every file revision I check in is pinned to a work order and a deployment request is just a list of work orders -- such info should be able to be pulled from the system automatically without me needing to extract it and report it. And then there is a backout plan -- well just do everything in reverse from what you did to deploy -- why do you need specific instructions? Similar applies for documentation... So I am curious if there is an overall, all-encompassing ERP that includes source control and minimizes paperwork by sharing centralized data across different documents (such as documentation being pulled from javadoc without needing to write it separately) associated with SDLC yet does not compromise structure and control over the code base and release management.

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  • Announcing Unbreakable Enterprise Kernel Release 3 for Oracle Linux

    - by Lenz Grimmer
    We are excited to announce the general availability of the Unbreakable Enterprise Kernel Release 3 for Oracle Linux 6. The Unbreakable Enterprise Kernel Release 3 (UEK R3) is Oracle's third major supported release of its heavily tested and optimized Linux kernel for Oracle Linux 6 on the x86_64 architecture. UEK R3 is based on mainline Linux version 3.8.13. Some notable highlights of this release include: Inclusion of DTrace for Linux into the kernel (no longer a separate kernel image). DTrace for Linux now supports probes for user-space statically defined tracing (USDT) in programs that have been modified to include embedded static probe points Production support for Linux containers (LXC) which were previously released as a technology preview Btrfs file system improvements (subvolume-aware quota groups, cross-subvolume reflinks, btrfs send/receive to transfer file system snapshots or incremental differences, file hole punching, hot-replacing of failed disk devices, device statistics) Improved support for Control Groups (cgroups)  The ext4 file system can now store the content of a small file inside the inode (inline_data) TCP fast open (TFO) can speed up the opening of successive TCP connections between two endpoints FUSE file system performance improvements on NUMA systems Support for the Intel Ivy Bridge (IVB) processor family Integration of the OpenFabrics Enterprise Distribution (OFED) 2.0 stack, supporting a wide range of Infinband protocols including updates to Oracle's Reliable Datagram Sockets (RDS) Numerous driver updates in close coordination with our hardware partners UEK R3 uses the same versioning model as the mainline Linux kernel version. Unlike in UEK R2 (which identifies itself as version "2.6.39", even though it is based on mainline Linux 3.0.x), "uname" returns the actual version number (3.8.13). For further details on the new features, changes and any known issues, please consult the Release Notes. The Unbreakable Enterprise Kernel Release 3 and related packages can be installed using the yum package management tool on Oracle Linux 6 Update 4 or newer, both from the Unbreakable Linux Network (ULN) and our public yum server. Please follow the installation instructions in the Release Notes for a detailed description of the steps involved. The kernel source tree will also available via the git source code revision control system from https://oss.oracle.com/git/?p=linux-uek3-3.8.git If you would like to discuss your experiences with Oracle Linux and UEK R3, we look forward to your feedback on our public Oracle Linux Forum.

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  • Do licenses matter if there's nobody around to enforce them?

    - by Corey
    Suppose that the original creators can't (or won't) enforce a license on their software/code, but that work is still popular. I guess if you want to visualize it, I'll throw out a convoluted hypothetical: Imagine a very small group of developers that released a code project under an open-source license. The repository was hosted on their servers. However, the everybody on the immediate development team passed away in a tragic accident or something. Their servers shut down after this happened. The project had a fairly large user base, and so others began to host the last revision on their own servers for others to download. (Yes, I have an active imagination) Does abiding by the license simply become a matter of morality by its users, or can there still exist a legal penalty when there is no one user or group to enforce it? Could anything be done if an unscrupulous user decided to branch off the project and use it under a different license? I am not looking for legal advice -- I am simply curious about how software licenses work. I tend to think of strange situations and wonder what would happen in those scenarios.

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  • JRockit R28 "Ropsten" released

    - by tomas.nilsson
    R28 is a major release (as indicated by the careless omissions of "minor" and "revision" numbers. The formal name would be R28.0.0). Our customers expect grand new features and innovation from major releases, and "Ropsten" will not disappoint. One of the biggest challenges for IT systems is after the fact diagnostics. That is - Once something has gone wrong, the act of trying to figure out why it went wrong. Monitoring a system and keeping track of system health once it is running is considered a hard problem (one that we to some extent help our customers solve already with JRockit Mission Control), but doing it after something occurred is close to impossible. The most common solution is to set up heavy logging (and sacrificing system performance to do the logging) and hope that the problem occurs again. No one really thinks that this is a good solution, but it's the best there is. Until now. Inspired by the "Black box" in airplanes, JRockit R28 introduces the Flight Recorder. Flight Recorder can be seen as an extremely detailed log, but one that is always on and that comes without a cost to system performance. With JRockit Flight Recorder the customer will be able to get diagnostics information about what happened _before_ a problem occurred, instead of trying to guess by looking at the fallout. Keywords that are important to the customer are: • Extremely detailed, always on, diagnostics information • No performance overhead • Powerful tooling to visualize the data recorded. • Enables diagnostics of bugs and SLA breaches after the fact. For followers of JRockit, other additions are: • New JMX agent that allows JRMC to be used through firewalls more easily • Option to generate HPROF dumps, compatible with tools like Eclipse MAT • Up to 64 BG compressed references (previously 4) • View memory allocation on a thread level (as an Mbean and in Mission Control) • Native memory tracking (Command line and Mbean) • More robust optimizer. • Dropping support for Java 1.4.2 and Itanium If you have any further questions, please email [email protected]. The release can be downloaded from http://www.oracle.com/technology/software/products/jrockit/index.html

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  • What GUI tools are available for which DVCS?

    - by Macneil
    When I worked at Sun, we used a DVC system called Forte SCCS/Teamware, which used the old SCCS file format, but was a true distributed source code revision control system. One nice feature is that it had strong GUI support: You could bringover and putback changes by simply clicking and dragging. It would draw trees/graphs showing how workspaces relate to each other. You also could have a graph view to display a single file's complete history, which might have had several branches and merges. Allowing you to compare any two points. It also had a strong visual merge tool, to let you accept changes from one of two conflicting files. Naturally, many of the current DVCSs have command line support for these operations, but I'm looking for GUI support in order to use this in a lower-level undergraduate course I'll be teaching. I'm not saying the Forte Teamware solution was perfect, but it did seem to be ahead of the curve. Unfortunately, it's not a viable option to use for my class. Question: What support do the current DVCSs have with regards to GUIs? Do any of them work on Windows, and not just Linux? Are they "ready for prime-time" or still works in progress? Are these standalone or built as plug-ins, e.g., for Eclipse? Note: To help keep this discussion focused I'm only interested in GUI tools. And not a meta-discussion if GUI tools should be used in teaching.

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  • RUEI 12.1.0.3.0 dependency requirement for php-soap-5.1.6

    - by sthieme
    Dear Readers,please be aware of the new php-soap-5.1.6 dependency in RUEI 12.1.0.3.For a swift upgrade to RUEI 12.1.0.3 you should be aware of this pre-requisite as it can be a time-eater to obtain individual rpm-packages inside of a datacenter for an old OS revision once you have started the upgrade process. You may use the following procedure to retrieve the required package via http://public-yum.oracle.com:Customers will have to check the /etc/issue, /etc/issue.net (or /etc/redhat-release for RHEL based OS) for their current release in order to obtain the fitting package version.Customers of OEL can download the packages from our public-yum.oracle.com Server: http://public-yum.oracle.com/repo/,  e.g. http://public-yum.oracle.com/repo/OracleLinux/OL5/8/base/x86_64/php-soap-5.1.6-32.el5.x86_64.rpmEarlier releases (up to 5.5) are located under the EnterpriseLinux instead of OracleLinux path, e.g.http://public-yum.oracle.com/repo/EnterpriseLinux/EL5/5/base/x86_64/php-soap-5.1.6-27.el5.x86_64.rpmNote: you will have to obtain the relevant RedHat rpm-packages via the login protected RHN URLs. Oracle can only provide support for Oracle Enterprise Linux and RHEL packages are not available publicly via rpm-seek.com to my knowledge. Kind regards,Stefan

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  • ubuntu 11.10 foreman error

    - by user1060759
    Like this post I am also trying to complete this heroku tutorial I have installed and used everything (node.js, npm, express) successfully until I got to Foreman. I installed Foreman by first installing Ruby: alex@ubuntu:~$ sudo apt-get install ruby1.9.1 then installing Foreman. I am a newbie to Unix so I "sudo" perhaps unnecessarily here, but I got confirmation in the terminal that it had installed but also some errors: alex@ubuntu:~/NodeHelloWorld$ sudo gem install foreman Invalid gemspec in [/var/lib/gems/1.8/specifications/foreman-0.26.1.gemspec]: invalid date format in specification: "2011-11-10 00:00:00.000000000Z" Invalid gemspec in [/var/lib/gems/1.8/specifications/term-ansicolor-1.0.7.gemspec]: invalid date format in specification: "2011-10-13 00:00:00.000000000Z" Invalid gemspec in [/var/lib/gems/1.8/specifications/foreman-0.26.1.gemspec]: invalid date format in specification: "2011-11-10 00:00:00.000000000Z" Invalid gemspec in [/var/lib/gems/1.8/specifications/term-ansicolor-1.0.7.gemspec]: invalid date format in specification: "2011-10-13 00:00:00.000000000Z" Successfully installed term-ansicolor-1.0.7 Successfully installed foreman-0.26.1 Then when I try to start foreman I get similar: alex@ubuntu:~/NodeHelloWorld$ foreman start Invalid gemspec in [/var/lib/gems/1.8/specifications/foreman-0.26.1.gemspec]: invalid date format in specification: "2011-11-10 00:00:00.000000000Z" Invalid gemspec in [/var/lib/gems/1.8/specifications/term-ansicolor-1.0.7.gemspec]: invalid date format in specification: "2011-10-13 00:00:00.000000000Z" /usr/lib/ruby/vendor_ruby/1.8/rubygems.rb:926:in `report_activate_error': Could not find RubyGem foreman (>= 0) (Gem::LoadError) from /usr/lib/ruby/vendor_ruby/1.8/rubygems.rb:244:in `activate_dep' from /usr/lib/ruby/vendor_ruby/1.8/rubygems.rb:236:in `activate' from /usr/lib/ruby/vendor_ruby/1.8/rubygems.rb:1307:in `gem' from /usr/local/bin/foreman:18 Can anyone help me? I am a newbie to Unix after finally dumping windows as I found I could not get foreman-windows to work for me either I have found this post from someone with apparently the same issue. Does this mean my version of ruby could be wrong? I am running 1.9.1, though again new to ruby as well; alex@ubuntu:~/NodeHelloWorld$ ruby1.9.1 -v ruby 1.9.2p290 (2011-07-09 revision 32553) [i686-linux] Thanks

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  • Dummy output after upgrade from 12.04 to 12.10, even though sound card is detected

    - by user115441
    So I just recently upgraded my system from Ubuntu 12.04 to 12.10. However, when I booted into 12.10 for the first time, no sound comes out of my speakers. I checked the sound settings and the Dummy Output was the only thing showing up. I used "hwinfo --sound" to check to see if my sound card was actually installed, and it was installed. hwinfo --sound hal.1: read hal dataprocess 2687: arguments to dbus_move_error() were incorrect, assertion "(dest) == NULL || !dbus_error_is_set ((dest))" failed in file ../../dbus/dbus-errors.c line 282. This is normally a bug in some application using the D-Bus library. libhal.c 3483 : Error unsubscribing to signals, error=The name org.freedesktop.Hal was not provided by any .service files 11: PCI 1b.0: 0403 Audio device [Created at pci.318] Unique ID: u1Nb._aiKlM91Nt0 SysFS ID: /devices/pci0000:00/0000:00:1b.0 SysFS BusID: 0000:00:1b.0 Hardware Class: sound Model: "Intel 82801FB/FBM/FR/FW/FRW (ICH6 Family) High Definition Audio Controller" Vendor: pci 0x8086 "Intel Corporation" Device: pci 0x2668 "82801FB/FBM/FR/FW/FRW (ICH6 Family) High Definition Audio Controller" SubVendor: pci 0x107b "Gateway 2000" SubDevice: pci 0x4040 Revision: 0x04 Driver: "snd_hda_intel" Driver Modules: "snd_hda_intel" Memory Range: 0x50240000-0x50243fff (rw,non-prefetchable) IRQ: 44 (91 events) Module Alias: "pci:v00008086d00002668sv0000107Bsd00004040bc04sc03i00" Driver Info #0: Driver Status: snd_hda_intel is active Driver Activation Cmd: "modprobe snd_hda_intel" Config Status: cfg=new, avail=yes, need=no, active=unknown I'm not sure what to do here. The only time the sound will actually work is when I boot into my Windows partition and then reboot into Ubuntu. I mean I don't want to have to do that every time I want to use Ubuntu. I would really appreciate any help I can get on here.

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  • How was Git designed?

    - by Mark Canlas
    My workplace recently switched to Git and I've been loving (and hating!) it. I really do love it, and it is extremely powerful. The only part I hate is that sometimes it's too powerful (and maybe a bit terse/confusing). My question is... How was Git designed? Just using it for a short amount of time, you get the feel that it can handle many obscure workflows that other version control systems could not. But it also feels elegant underneath. And fast! This is no doubt in part to Linus's talent. But I'm wondering, was the overall design of git based off of something? I've read about BitKeeper but the accounts are scant on technical details. The compression, the graphs, getting rid of revision numbers, emphasizing branching, stashing, remotes... Where did it all come from? Linus really knocked this one out of the park and on pretty much the first try! It's quite good to use once you're past the learning curve.

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  • How to refactor while keeping accuracy and redundancy?

    - by jluzwick
    Before I ask this question I will preface it with our environment. My team consists of 3 programmers working on multiple different projects. Due to this, our use of testing is mostly limited to very general black box testing. Take the following assumptions also: Unit Tests will eventually be written but I'm under strict orders to refactor first Ignore common Test-Driven Development techniques when given this environment, my time is limited. I understand that if this were done correctly, our team would actually save money in the long-term by building Unit-Tests before hand. I'm about to refactor a fairly large portion of the code that is critical. While I believe my code will accurately work when done and after our black box testing, I realize that there will be new data that the new code might not be able to handle. What I wanted to know is how to keep old code that functions 98% of the time so that we can call those subroutines in case the new code doesn't work properly. Right now I'm thinking of separating the old code in a separate class file and adding a variable to our config that will tell the program which code to use. Is there a better way to handle this? NOTE: We do use revision control and we have archived builds so the client could always revert to a previous build, but I would like to see if there is a decent way of doing this besides reverting. I want this so they can use the other new functionality delivered in the new build. Edit: While I agree I will need to write Unit Tests for this, I don't believe I will capture everything with them. I'm looking for ways to easily be able to revert to the old, functional code should anything happen. While I know this is a poor practice, I'm planning on removing this code after our team can guarantee that the new code works to the same standards as the old.

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  • Ubuntu 14.04 ATI Radeon open source driver with distorted video playback

    - by Bwog
    Video in VLC or SMplayer is often in black and white with washed-out colors in the wrong place (translated considerably). Moreover, the last video image is often visible when a new video is started and persist as long as the new video is running. Colors have a recognizable shape (e.g. a persons clothes or face), but can be obviously incorrect (e.g. green or purples faces). This is independent of the format of the videos (mp4, mkv, wmv). Sometimes all problems disappear when a new video is started, but often only a reboot restores normal video. Ubuntu was upgraded to 14.04 and is fully updated. Processor intel core i5-2500K cpu. gpu: amd/ati Radeon HD 7950. graphics: gallium 0.4 on AMD Tahiti. xorg xserver amd/ati display driver wrapper from xserver-xorg-video-ati. :~$ Xorg -version X.Org X Server 1.15.1 Release Date: 2014-04-13 X Protocol Version 11, Revision 0 Build Operating System: Linux 3.2.0-37-generic x86_64 Ubuntu Current Operating System: Linux Mare 3.13.0-29-generic #53-Ubuntu SMP Wed Jun 4 21:00:20 UTC 2014 x86_64 Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.13.0-29-generic.efi.signed root=UUID=number ro Build Date: 16 April 2014 01:36:29PM xorg-server 2:1.15.1-0ubuntu2 Current version of pixman: 0.30.2 ~$ lspci | grep VGA 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tahiti PRO [Radeon HD 7950/8950 OEM / R9 280] Question: how to restore regular video playback?

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  • Allow user to SUDO a script without password.

    - by John Isaacks
    I have a php script with this: <?php #echo exec('whoami'); $output = shell_exec('bash /usr/local/svn/bash_repo/make-live'); echo "$output"; ?> The make-live script contains this: #!/bin/bash cd /var/www-cake sudo svn checkout file:///usr/local/svn/bash_repo/repo/ echo "Head revision has been pushed to live server" So the PHP user who is www-data needs to have nopasswd for that script. I am told I need to add: www-data ALL=NOPASSWD: /usr/local/svn/bash_repo/make-live To sudoers to allow this. First I run sudo visudo but I have no experience with vi so I try to open it in gedit with export EDITOR=gedit && sudo -E visudo which then just opens a sudoers.tmp file which is empty. I add the line and save it. But it doesn't do save. So I just try sudo visudo and I add the line right beneath this part: # User privilege specification root ALL=(ALL) ALL www-data ALL=NOPASSWD: /usr/local/svn/bash_repo/make-live I closed out sudoers and reopened to verify that it has saved. I even restart apache. I run the php file and it still doesn't work. What am I missing?

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  • Two new Visual WebGui released simultaneously

    - by Webgui
    Two new Visual WebGui versions were released simultaneously. Downloads are available here. The first is a revision to the beta version of the upcoming 6.4 which brings all-new developer/designer interface and capabilities. The second release is the latest enhancement of the current 6.3.x version. The new 6.3.15 includes the following changes over 6.3.14: Breaking Changes [1] ---------------------------------------------------------------------------------------------- VWG-6132 - [v6.3.15] Deploy language resource assemblies next to the Gizmox.WebGUI.Forms assembly location Installation puts the resources in the assemblies folder rather thatn the GAC. That way they are copied to the output folder of the app, thus enabling their deployment to the server. Bugs fixes [7] ---------------------------------------------------------------------------------------------- VWG-5714 - Help.ShowHelp of .CHM file with images should show the images VWG-6132 - [v6.3.15] Deploy language resource assemblies next to the Gizmox.WebGUI.Forms assembly location VWG-6401 - Radiobutton: The DoubleClick event should fire. VWG-6409 - The Hourglass (white/blue) Spinner icon should not display to the left on LTR cultures VWG-6452 - Calling/Causing an update on a scrollable container should not reset the scroll position. VWG-6463 - Redrawing a scrollable container does not preserve last scrolling position. VWG-6867 - Listbox: The Items selection in run time should be work correctly Enhancements [1] ---------------------------------------------------------------------------------------------- VWG-6610 - Visifire - Add a click event handler on the graph

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  • no way to use opendns on pppoe connection?

    - by magisterludi
    I have an old speedtouch usb modem (revision 0) and on my desktop with xubuntu 12.04 I've configured a pppoe connection. I can connect and my ISP assign an IP address and the DNS but the primary DNS address is not reachable by ping, the secondary yes but no address is resolved then I can't surf the web. Then I want to set the open DNS but there is bo way, if I change manually /etc/resolv.conf it is rewrited by some script (there is the flag usepeerdns on the configuration script, if I exclude it there is no way to assign any DNS server because resolv.conf is not read) also if I set not writable the file changing the default permission. I changed dhclient.conf with the code prepend domain-name-servers 208.67.222.222,208.67.220.220; and now if I connect by a wifi connection to my router I'm using openDNS server but ppp does not use this script as long as I can see and the DNS server is always setted by my ISP. How can I use set DNS manually to a PPP connection? Is there any way to change it after the connection? Why NetworkManager is not able to manage my dsl connection, it seems not able to manage the dsl usb cable modem. If I use pppoeconf NetworkManager doesn't start and I have to manually delete the lines added to /etc/network/interfaces because the system is not able to start with full configuration of network If I connect a modem-router to the same line I can surf with the DNS server assigned by my ISP, I can't figure why. Some suggestion? Thanks to all

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  • OpenJDK 6 B24 Available

    - by user9158633
    On November 16, 2011 the source bundle for OpenJDK 6 b24 was published at http://download.java.net/openjdk/jdk6/. The main changes in b24 are the latest round of security updates (e.g. the security changes in jdk repo) and a few other fixes.  For more information see the detailed list of all the changes in OpenJDK 6 B24. Test Results: All the jdk regression tests run with  make test passed. cd jdk6 make make test Per Kelly's  B23 Release blog: The new process is - all the jdk regression tests run with make test should just pass. Over time we will fix the tests that have been excluded, possibly add more tests, and exclude tests that fail to demonstrate stability (with a bug filed against the test). For the current list of excluded tests see  jdk6/jdk/test/ProblemList.txt file: ProblemList.html in B24  |  Latest ProblemList.txt (in the tip revision). Special thanks to Kelly O'Hair for his direction and Dave Katleman for his Release Engineering work.

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  • What's wrong with my ext4 partition?

    - by bumbling fool
    What is wrong with this picture? Top is output from "df -h", bottom is gparted. I suspect I'm missing a lot of free space. No problems other than that (yet). Can somebody suggest the best (non-destructive) way to correct this? sudo dumpe2fs -h /dev/sda3: (source http://pastebin.com/nAvrdT4E) Filesystem volume name: <none> Last mounted on: / Filesystem UUID: 9f6eff64-60d7-4eec-81d5-1e8acd818b38 Filesystem magic number: 0xEF53 Filesystem revision #: 1 (dynamic) Filesystem features: has_journal ext_attr resize_inode dir_index filetype needs_recovery extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize Filesystem flags: signed_directory_hash Default mount options: (none) Filesystem state: clean Errors behavior: Continue Filesystem OS type: Linux Inode count: 1602496 Block count: 6406144 Reserved block count: 320306 Free blocks: 4842284 Free inodes: 1361222 First block: 0 Block size: 4096 Fragment size: 4096 Reserved GDT blocks: 1022 Blocks per group: 32768 Fragments per group: 32768 Inodes per group: 8176 Inode blocks per group: 511 RAID stride: 32692 Flex block group size: 16 Filesystem created: Sun Nov 8 18:18:13 2009 Last mount time: Tue Mar 1 01:04:27 2011 Last write time: Mon Feb 28 04:27:34 2011 Mount count: 16 Maximum mount count: 28 Last checked: Thu Feb 24 06:23:39 2011 Check interval: 15552000 (6 months) Next check after: Tue Aug 23 07:23:39 2011 Lifetime writes: 227 GB Reserved blocks uid: 0 (user root) Reserved blocks gid: 0 (group root) First inode: 11 Inode size: 256 Required extra isize: 28 Desired extra isize: 28 Journal inode: 8 First orphan inode: 268015 Default directory hash: half_md4 Directory Hash Seed: cc101517-e617-482b-a883-a72919419c84 Journal backup: inode blocks Journal features: journal_incompat_revoke Journal size: 128M Journal length: 32768 Journal sequence: 0x001d3000 Journal start: 7787 fdisk and parted output per requests: http://pastebin.com/EGVH7Ken

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  • Why is my root filesystem always scanned at boot?

    - by luri
    I always have a pause at boot saying my filesystems are being checked (with a "press C to cancel" note, too). Actually (seeing boot.log) I think it's the / fs, which is located at /dev/sdb5 Several questions altoghether, here (hope this does not break any rule): Is this normal? Can I (or even should I) prevent this anyhow? According to boot.log (below) the fs does not seem to be 'clean', or, at least, it's in an state or condition that makes fsck always can it for errors for a while (just a few seconds). How can I fix it? Edit: This is my boot.log: fsck desde util-linux-ng 2.17.2 udevd[515]: can not read '/etc/udev/rules.d/z80_user.rules' /dev/sdb5: 249045/32841728 ficheros (0.3% no contiguos), 20488485/131338752 bloques init: ureadahead-other main process (1111) terminated with status 4 init: ureadahead-other main process (1116) terminated with status 4 Password: * Starting AppArmor profiles [160G Skipping profile in /etc/apparmor.d/disable: usr.bin.firefox [154G[ OK ] * Setting sensors limits [160G [154G[ OK ] And this is dumpe2fs results for the filesystem being checked (well, the relevant part of the log): Filesystem volume name: <none> Last mounted on: / Filesystem UUID: 42509bf9-f3e6-460a-8947-ec0f5c1fbcc8 Filesystem magic number: 0xEF53 Filesystem revision #: 1 (dynamic) Filesystem features: has_journal ext_attr resize_inode dir_index filetype needs_recovery extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize Filesystem flags: signed_directory_hash Default mount options: (none) Filesystem state: clean Errors behavior: Continue Filesystem OS type: Linux Inode count: 32841728 Block count: 131338752 Reserved block count: 6566937 Free blocks: 110850356 Free inodes: 32592701 First block: 0 Block size: 4096 Fragment size: 4096 Reserved GDT blocks: 992 Blocks per group: 32768 Fragments per group: 32768 Inodes per group: 8192 Inode blocks per group: 512 Flex block group size: 16 Filesystem created: Fri Dec 10 19:44:15 2010 Last mount time: Mon Feb 14 17:00:02 2011 Last write time: Mon Feb 14 16:59:45 2011 Mount count: 1 Maximum mount count: 33 Last checked: Mon Feb 14 16:59:45 2011 Check interval: 15552000 (6 months) Next check after: Sat Aug 13 17:59:45 2011 Lifetime writes: 331 GB Reserved blocks uid: 0 (user root) Reserved blocks gid: 0 (group root) First inode: 11 Inode size: 256 Required extra isize: 28 Desired extra isize: 28 Journal inode: 8 First orphan inode: 28049496 Default directory hash: half_md4 Directory Hash Seed: d3d24459-514b-4413-b840-e970b766095b Journal backup: inode blocks Journal features: journal_incompat_revoke Tamaño de fichero de transacciones: 128M Journal length: 32768 Journal sequence: 0x0005e0c4 Journal start: 1 This is the relevant (at least I think this is the fs being checked) line in fstab: #Entry for /dev/sdb5 : UUID=42509bf9-f3e6-460a-8947-ec0f5c1fbcc8 / ext4 errors=remount-ro 0 1

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  • What triggered the popularity of lambda functions in modern mainstream programming languages?

    - by Giorgio
    In the last few years anonymous functions (AKA lambda functions) have become a very popular language construct and almost every major / mainstream programming language has introduced them or is planned to introduce them in an upcoming revision of the standard. Yet, anonymous functions are a very old and very well-known concept in Mathematics and Computer Science (invented by the mathematician Alonzo Church around 1936, and used by the Lisp programming language since 1958, see e.g. here). So why didn't today's mainstream programming languages (many of which originated 15 to 20 years ago) support lambda functions from the very beginning and only introduced them later? And what triggered the massive adoption of anonymous functions in the last few years? Is there some specific event, new requirement or programming technique that started this phenomenon? IMPORTANT NOTE The focus of this question is the introduction of anonymous functions in modern, main-stream (and therefore, maybe with a few exceptions, non functional) languages. Also, note that anonymous functions (blocks) are present in Smalltalk, which is not a functional language, and that normal named functions have been present even in procedural languages like C and Pascal for a long time. Please do not overgeneralize your answers by speaking about "the adoption of the functional paradigm and its benefits", because this is not the topic of the question.

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  • Which Bliki (Blog+Wiki) solution can you recommend?

    - by asmaier
    I'm searching for a good Bliki solution, meaning a combination of blog and wiki that I can install on my own web space. I would like to be able to write articles in the wiki style much like with media wiki. So I want to use a wiki markup language, have a revision history, comments, internal links to other pages (maybe in other languages) and be able to collaboratively edit the articles. On the other side I would like to have a blog-like view on my articles, showing new articles (and changes to existing articles) in a time ordered fashion. It would be nice if it would be possible to search through the articles and also tag the articles, so one could generate a tag cloud for the articles. A nice feature would also be to be able to order the articles according to views or even a voting system for the articles. Good would also be a permission system to keep certain articles private, showing them only to people logged in to the platform. Apart from these nice to have features an absolute must have feature for the Bliki platform I'm searching is the possibility to handle math equations (written in LaTeX syntax) and display them either as pictures like media wiki or even better using Mathjax. At the moment I'm using a web service called wikiDot which offers some of the mentioned features, however the free version shows to much advertisements, the blog feature is not mature, the design is quite ugly and loading of the page is often slow. So I want to install a Bliki solution on my own webspace. Can you recommend any solution for that?

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  • Do you store mysql exports in your version control tool for reverting to in event of error?

    - by Rob
    We run an internal web server with in-house software to run a manufacturing line. When new product features are to be added, either or both of the following occur: changes to the in-house server software may be required to support these - these are for significant changes in functionality, being code drive. changes to the MySQL database for new entries for the part numbers, these are for smaller changes, configurations, changes to already existing values and parameters -- such changes don't require code changes. Ideally we'd want our changes to be here rather than in item 1. Item 1 is version controlled in Subversion, so previous revisions can be referred to for rolling back to in the event of problems introduced in the latest revision. But what about changes to the MySQL database? We have quality processes to ensure that such changes are error-free but there is always a chance that errors can pass through, e.g. mistake in data entry or faults with the code that uses the MySQL corrupting the database etc. We have a automated backup every 6 hours but what if we want more manual defined checkpoints in between these intervals, we could use the same backup system but I wondered if folks here used other methods to store previous states of databases, e.g. exporting the database as a plain text SQL dump -- at least with this method it would be possible to see diffs e.g. in Beyond Compare for trouble shooting. Thoughts?

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  • browser without gpu support

    - by manuzhang
    Google has an Easter egg that draws 3D graph but when I tried it out on chrome it complained about no WebGL support. I've also tested it on Firefox whose WebGL support was enabled but ended up with the same problem. Thus, I suspect it's an issue of my GPU. Some googling led me to chrome://gpu and here's what I got Graphics Feature Status Canvas: Software only, hardware acceleration unavailable HTML Rendering: Software only, hardware acceleration unavailable 3D CSS: Unavailable. Hardware acceleration unavailable WebGL: Unavailable. Hardware acceleration unavailable WebGL multisampling: Unavailable. Hardware acceleration unavailable Problems Detected GPU process was unable to boot. Access to GPU disallowed. GL driver is software rendered. Accelerated compositing is disabled.: 59302 Mesa drivers in linux older than 7.11 are assumed to be buggy. Accelerated 2d canvas is unstable in Linux at the moment. Version Information Data exported Tue Apr 10 2012 18:35:57 GMT+0800 (CST) Chrome version 18.0.1025.151 (Official Build 130497) Operating system Linux 3.0.0-0300-generic Software rendering list version 1.27 ANGLE revision 988 2D graphics backend Skia I wonder what each of the problem implies and How I may properly deal with it? I'm using Ubuntu 11.04

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