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• Shortest command to calculate the sum of a column of output on Unix?

  - by Andrew

  I'm sure there is a quick and easy way to calculate the sum of a column of values on Unix systems (using something like awk or xargs perhaps), but writing a shell script to parse the rows line by line is the only thing that comes to mind at the moment. For example, what's the simplest way to modify the command below to compute and display the total for the SEGSZ column (70300)? ipcs -mb | head -6 IPC status from /dev/kmem as of Mon Nov 17 08:58:17 2008 T ID KEY MODE OWNER GROUP SEGSZ Shared Memory: m 0 0x411c322e --rw-rw-rw- root root 348 m 1 0x4e0c0002 --rw-rw-rw- root root 61760 m 2 0x412013f5 --rw-rw-rw- root root 8192

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• Project hosting vs. my own SVN

  - by BigG

  I'm working on different projects with some small teams (2-3 people for each). Those projects are about some scientific stuff, most (probably all) the code will be released under GPL after the publication of some results and we don't want to spend money for this. My first question is: should i keep my local SVN server or you know some good service for this? Both of them have some disadvantages and services like xp-dev.com looks pretty interesting but should i trust them? [i'll get only the free plan] Online services give you some tools for project management, what do you think about them?

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• Configuring 2 XBee Modules on OSX for wireless connection

  - by Annette

  I am trying find out how and with which program for OSX (10.5.8) I can configure serial ports? I am trying to establish a wireless connection between two Xbee´s (RF modules) and cannot figure out how to use ZTerm nor screen under Terminal. The setup I am using is: an Arduino+Xbeeshield+Xbee with external power supply, and an xbee on the xbee explorer connected to the Computer via USB. I am trying to gather information on this through various forums, but most of them cover the configuration issue for PC using X-CTU (which I tried with CrossOver but it doesn´t recognize ny of my ports). According to one source, using screen under Terminal should show me all my serial ports, particularly /dev/tty.KeySerial1 - but it doesn´t show, even though I´ve plugged in both my arduino+xbee shield and the xbee on the explorer.

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• Hudson: where to download file and stop specific builds running ?

  - by Kim Jong Woo

  I have a file that is generated inside (hudson server) /var/lib/hudson/jobs/jobtitle/1/out.txt I need to fetch this file, but doing a GET request for http://myhudson:8090/job/jobtitle/1/out.txt doesn't actually locate the file. Basically, I have another box that will grab this file from the hudson server. This box will make the out.txt file available for download. Another challenge is the build number directories. How would I be able to use the hudson API to stop or delete the specific builds running ? I am forced to do iterate through all build numbers to send STOP or DELETE api call in php using wget to do the REST API call. This is not very efficient. for ($i=0; $i < 3000; $i++){ exec('wget -O /dev/null "http://myhudson:8090/job/' . 'jobtitle' . '/$i/stop"'); }

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• Grails external Jms broker (active mq)

  - by TheBigS

  I have what will become an 'external' activemq server I'd like grails to be able to talk to. Right now I am just running it on my dev box. Here is what I have setup right now: 1) Run activemq server 2) Run activemq/examples using ant to produce messages 3) View ActiveMQ admin site: http://localhost:8161/admin/queues.jsp verify that messages are in the queue. 4) Follow Mini Tutorial to create the Service and Controller: http://www.grails.org/ActiveMQ+Plugin 5) Configured my Grails resources.groovy file as follows: beans = { jmsConnectionFactory(SingleConnectionFactory){ targetConnectionFactory = { ActiveMQConnectionFactory cf -> brokerURL = 'tcp://localhost:61616' } } } When I run the grails app I get a BindException saying port 61616 is already in use. How do I configure this to use my server that is already running? I've tried changing 'localhost' to '127.0.0.1' and to my LAN ip, but no luck, it keeps trying to setup its own embedded activemq server. Any ideas?

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• How do I convince Eclipse to show javadoc documentation under Ubuntu 9.04 for openjdk?

  - by Neil Trodden

  I'm having a pretty hard time with this! I have installed the java documentation at: file:///usr/share/doc/openjdk-6-jre/api/index.html And loading that file up does show me all the documentation. However, I would like to browse it directly from within eclipse and see the documentation when I hover over a class. For example, when I hover over "javax.servlet.http.HttpServletRequest", I would like to see the documentation for it. All I get is: Note: This element has no attached source and the Javadoc could not be found in the attached Javadoc. Can anyone help correct my dev environment?

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• Translate This git_parse_function to zsh?

  - by yar

  I am using this function in Bash function parse_git_branch { git_status="$(git status 2> /dev/null)" pattern="^# On branch ([^${IFS}]*)" if [[ ! ${git_status}} =~ "working directory clean" ]]; then state="*" fi # add an else if or two here if you want to get more specific if [[ ${git_status} =~ ${pattern} ]]; then branch=${BASH_REMATCH[1]} echo "(${branch}${state})" fi } but I'm determined to use zsh. While I can use this perfectly as a shell script (even without a shebang) in my .zshrc the error is a parse error on this line if [[ ! ${git_status}}... What do I need to do to get it ready for zshell? Note: I realize the answer could be "go learn zsh syntax," but I was hoping for a quick hand with this if it's not too difficult.

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• jquery offset incorrect on floating elements

  - by LordZardeck

  I have a bunch of images each with the float: left property applied to them. They are constrained withing a 400px width area, forcing them into a grid of 4 X 4. If i try to get the position of them, they are always incorrect. What is causing this? You can see what I'm trying to do here: http://dev.redemptionconnect.com/cards/browse. Click one of the images to see what I mean. the dialog that pops up should be over the image you clicked.

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• VS 2010 Error “Object reference not set to an instance of an object” when adding Service Reference f

  - by Andy

  I have a VS2010 (RTM) solution which contains: WCF Service project Console WCF client project Class project for DataContracts and members Class project for some simple classes I successfully added a service reference in the console client project and ran the client. I then did a long dev cycle repeatedly modifying the service then updating console service reference. I then changed the namespace and assembly names for the projects as well as the .cs using references and app.config. I of course missed some things as it would not build so I eventually removed the project references and the service reference, cleaned and built successfully. I then attempted to add the service reference again, it discovered it but threw the “Object reference not set to an instance of an object” when OK'ing. Fix in answer below...

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• jQuery: What listener do I use to check for browser auto filling the password input field?

  - by Jannis

  Hi, I have a simple problem that I cannot seem to find a solution to. Basically on this website here: http://dev.supply.net.nz/vendorapp/ (currently in development) I have some fancy label animations sliding things in and out on focus & blur. However once the user has logged in once the browser will most likely remember the password associated with the users email address/login. (Which is good and should not be disabled.) However I run into issues triggering my label slide out animation when the browser sets the value on the #password field automatically as the event for this is neither focus nor blur. Does anyone know which listener to use to run my function when the browser 'auto fills' the users password? Here is a quick screenshot of the issue:

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• How should I migrate DDL changes from one environment to the next?

  - by Rl

  I make DDL changes using SQL Developer's GUI. Problem is, I need to apply those same changes to the test environment. I'm wondering how others handle this issue. Currently I'm having to manually write ALTER statements to bring the test environment into alignment with the development environment, but this is prone to error (doing the same thing twice). In cases where there's no important data in the test environment I usually just blow everything away, export the DDL scripts from dev and run them from scratch in test. I know there are triggers that can store each DDL change, but this is a heavily shared environment and I would like to avoid that if possible. Maybe I should just write the DDL stuff manually rather than using the GUI?

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• Check if iOS app is live in app store

  - by MSK

  Is it possible somehow to code like below in iOS app ? if(app is live in app store) { //Do something } else { //Do other thing } I wanted to avoid cases where our QE/Dev team is using app for testing. Is there a way I can detect how app code is signed (Developer/Adhoc/Distribution) to check ? Even if it is possible, it will not eliminate cases when Apple is using our app for testing as part of review. We recorded many downloads of our content by Apple before our app goes live in App store.

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• Difficulties with Django on Google App Engine

  - by Rosarch

  I have a Django project that works fine. I'm trying to import it to Google App Engine. I run it on the dev server, and I get an import error: ImportError at / No module named mysite.urls This is the folder structure of mysite/: app.yaml <DIR> myapp index.yaml main.py manage.py <DIR> media settings.py urls.py __init__.py app.yaml: application: mysite version: 1 runtime: python api_version: 1 handlers: - url: .* script: main.py from settings.py: ROOT_URLCONF = 'mysite.urls' What am I doing wrong?

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• Is Microsoft CCR gaining any traction?

  - by spender

  Microsoft's Concurrency and Coordination Runtime quite literally saved a project that was running into major issues with deadlocking. Since then I find that I use it more and more frequently for almost anything that requires asynchronous coding producing results that run lighter and faster than before. I can honestly state that it has transformed the way I think about multithread/multicore dev. Despite my personal love for CCR, there appears to be very little buzz surrounding it on the web and was wondering if anyone can offer any reason for this. Are there better alternatives, or is it a lack of promotion from MS, or are people simply happy with the existing tools?

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• Python preprocessing imports

  - by FiloSottile

  I am managing a quite large python code base (2000 lines) that I want anyway to be available as a single runnable python script. So I am searching for a method or a tool to merge a development folder, made of different python files into a single running script. The thing/method I am searching for should take code split into different files, maybe with a starting __init___.py file that contains the imports and merge it into a single, big script. Much like a preprocessor. Best if a near-native way, better if I can anyway run from the dev folder. I have already checked out pypp and pypreprocessor but they don't seem to take the point. Something like a strange use of __import__() or maybe a bunch of from foo import * replaced by the preprocessor with the code? Obviously I only want to merge my directory and not common libraries.

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• Magento data-install script

  - by Vladimir Kerkhoff

  I'm trying to build a data install script that I use to setup a new webstore. This script creates the categories, pages and static blocks and default settings for the specific shop (we use a multistore setup to host the shops). In our dev/staging setup this scripts runs great and all categories are build without any problem. But on our live system this script fails. After some debugging I found the difference is in the Flat catalog usage on the live systems. The problem with creating the category with the flat tables enabled is in getting the parent path information based on the parentId given: $parentCategory = Mage::getModel('catalog/category')->load($parentId); Without flat categories enabled this gives a correct parentCategory, but with flat categories enabled it gives an empty object. Why is this behaviour with flat categories enabled?

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• T-SQL - Is there a (free) way to compare data in two tables?

  - by RPM1984

  Okay so i have table a and table b. (SQL Server 2008) Both tables have the exact same schema. For the purposes of this question, consider table a = my local dev table, table b = the live table. I need to create a SQL script (containing UPDATE/DELETE/INSERT statements) that will update table b to be the same as table a. This script will then be deployed to the live database. Any free tools out there that can do this, or better yet a way i can do it myself? I'm thinking i probably need to do some type of a join on all the fields in the tables, then generate dynamic sql based on that. Anyone have any ideas?

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• Revert to previous Git commit

  - by Crazy Serb

  How do I revert from my current state to a snapshot made on a certain commit? If I do git log, I get the following output: [root@me dev]# git log commit a867b4af366350be2e7c21b8de9cc6504678a61b` Author: Me Date: Thu Nov 4 18:59:41 2010 -0400 blah blah blah... commit 25eee4caef46ae64aa08e8ab3f988bc917ee1ce4 Author: Me Date: Thu Nov 4 05:13:39 2010 -0400 more blah blah blah... commit 0766c053c0ea2035e90f504928f8df3c9363b8bd Author: Me Date: Thu Nov 4 00:55:06 2010 -0400 And yet more blah blah... commit 0d1d7fc32e5a947fbd92ee598033d85bfc445a50 Author: Me Date: Wed Nov 3 23:56:08 2010 -0400 Yep, more blah blah. How do revert to the commit from November 3?

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• Multiple databases support in Symfony

  - by Ngu Soon Hui

  I am using Propel as my DAL for my Symfony project. I can't seem to get my application to work across two or more databases. Here's my schema.yml: db1: lkp_User: pk_User: { type: integer, required: true, primaryKey: true, autoIncrement: true } UserName: { type: varchar(45), required: true } Password: longvarchar _uniques: Unique: [ UserName ] db2: tesco: Id: { type: integer, required: true, primaryKey: true, autoIncrement: true } Name: { type: varchar(45), required: true } Description: longvarchar And here's the databases.yml: dev: db1: param: classname: DebugPDO test: db1: param: classname: DebugPDO all: db1: class: sfPropelDatabase param: classname: PropelPDO dsn: 'mysql:dbname=bpodb;host=localhost' #where the db is located username: root password: #pass encoding: utf8 persistent: true pooling: true db2: class: sfPropelDatabase param: classname: PropelPDO dsn: 'mysql:dbname=mystore2;host=localhost' #where the db is located username: root password: #pass encoding: utf8 persistent: true pooling: true When I call php symfony propel-build-model, only db1 is generated, db2 is not. Any idea how to fix this problem?

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• Possible to create JSR 286 portlet using Coldfusion?

  - by Jakub

  I was just thinking this morning, since ColdFusion is essentially built on JAVA, is it possible to create JSR 286 portlets using coldfusion? A search revealed that it might be possible, but I cannot find any material on this? Reason I ask is because I would love to be able to create Liferay compatible portlets with ColdFusion, as I am not a JAVA dev. Thoughts? Does anyone have any tutorials or references on this subject? EDIT Is there anyways to get CF portlets without CF running in the container? I'm curious how this would work with having only one license of CF. Would I need another license to run under liferay (if I can even run in liferay?)

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• MP4 video plays on localhost but not after publish

  - by teahou

  I made a video using Camtasia Studio 8. I added it to my MVC App and ran it on local host, video plays fine. I publish to my local dev web server (windows server 2008), the video will not play. Gives no error. I have tried on chrome and IE11. On chrome I checked the network tab and it says "Status - Cancelled". Do I need to make some changes on the web server settings? <video width="320" height="240" controls="controls"> <source src="@Url.Content("~/Content/videos/3_Comments_Letters.mp4")" /> </video>

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• jquery, simplemodal with a tooltip?

  - by matthewsteiner

  I'm using http://dev.mariusilie.net/content/simple-tooltip-jquery-plugin for my tooltip and simple modal for a modal window. I've got a link in the modal window and when I put my mouse over it, the tooltip is there, but it's beneath the modal window. I think it has to do with "z-index". I looked and I think the modal window is at 1000. I've set the #simpleTooltip property in the css with various z-index values, with no luck. It always appears beneath the modal window. Any Ideas?

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• Setting a background drawable for a dialog?

  - by user291701

  Hi, Tried posting this at android dev, wanted to go here too in case anyone knows. I'm trying to supply a custom background drawable for a dialog. I've created the following in my styles.xml file: <style name="CustomDlg" parent="@android:style/Theme.Dialog"> <item name="android:windowBackground">@drawable/my_background</item> </style> This works fine on 1.6+. On my g1 running 1.5 (and the 1.5 emulator) the drawable is used, but the area around the dialog is opaque black instead of being translucent. Is there something I'm missing here, or is this a bug with 1.5? Any work arounds? Is 1.5 just the ie6 of Android? Thanks

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• Why are there performance differences when a SQL function is called from .Net app vs when the same c

  - by Dan Snell

  We are having a problem in our test and dev environments with a function that runs quite slowly at times when called from an .Net Application. When we call this function directly from management studio it works fine. Here are the differences when they are profiled: From the Application: CPU: 906 Reads: 61853 Writes: 0 Duration: 926 From SSMS: CPU: 15 Reads: 11243 Writes: 0 Duration: 31 Now we have determined that when we recompile the function the performance returns to what we are expecting and the performance profile when run from the application matches that of what we get when we run it from SSMS. It will start slowing down again at what appear to random intervals. We have not seen this in prod but they may be in part because everything is recompiled there on a weekly basis. So what might cause this sort of behavior?

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• Does Visual Studio 2010 on x64 crash often? Or is it just on my PC?

  - by JK

  MY VS2010 crashes dozens of times a day. Compare that to 2008 and 2005 which were rock solid. Is 2010 known to be susceptible to crashing? Or could it be my environment? I'm using x64 as a dev box for the first time. The only plugin I has so far is Ankh. It crashes when doing different things. One I've noticed so far that always happens is if I press the key sequence alt-f-s-up (or any cursor key) it will crash every time.

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