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• Automatically Snapshoting AWS instances (or other back up strategy)

  - by user1172468

  I just realized that my aws instance count has risen into the double digits. I'm currently backing portions of my folders and dbs and moving them off to a backup instance. What I think I should be doing is taking a snapshot of the instances (automatically) and persisting them on S3 so I have a running 7 day collection of daily backups. There is a question asking the same thing here, however the answers don't go into depth. So the closest answer seems to be: use a cron job to snapshot the instance. So do I run the cron job on the instance itself? or do I have a micro instance to run these snapshots? Could I get an example script or the command for say a linux flavor? what software must I have installed to get this to run? Thanks.

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• Program to print gCal or iCal calendars in a monthly one calendar per column format

  - by David Smith

  I'm moving my family off of using the low tech "Boynton Mom's Family Calendar" to schedule things but I'd like to be able to create a monthly printout of the calendar in the same "Boynton" format (I'm sure it has an official name). The format is kind-of like a spreadsheet where each row of the calendar is a different day of the month and there is a separate column for each person in the family. I have all our calendars on Google but they are also accessible from iCal on the Mac. Is there a Mac program that can get the data from gCal or iCal print out the calendars in the Boynton format?

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• jQuery dialog open causes page to continuously lengthen in IE [closed]

  - by Michael

  I made my first dialog and AJAX work in jQuery and finally got everything working great - the dialog has a few buttons, cancel, save, and generate to get a new random string from the server. The problem is when I make the dialog modal (graying out the rest of the window), then in IE the scrollbars appear and sometimes keep moving as the page continuously extends down. This happens whenever the dialog is opened (it's not initially set to open) but not everytime. I can't think of any part of my code that would do this as I don't even have a JS loop anywhere. Googling for this didn't help. It seems like an IE vs jQuery quirk but any ideas?

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• using Excel VBA, given the daily price of 50 stocks, choose 10 stocks such that they have the minumu

  - by correl

  The high-level goal is to choose 10 stocks that have the lowest correlation among one another, out of a pool of 50, so that I can have a well-diversified portfolio. I have managed to write some VBA macro to download the past 3 years of daily price data from Yahoo finance, and then compute the 50x50 correlation matrix (using the Correl function), using the daily close as the data. What I have tried so far is just some local-maximum heuristic: - For the two stocks that have the highest correlation with each other, remove one of them. Between the two, remove the one that has the higher average correlation with all the other stocks. - When I remove a stock from the pool, I just delete the correponding row and column, to give a smaller matrix. - Repeat until I have just 10 stocks remaining (a 10x10 matrix). I was wondering if there is some algorithm that already solves such a problem and gives the optimum solution?

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• Linux Transparent Bridge for Network

  - by Blackninja543

  I am attempting to set up a semi-transparent bridge. I say semi because I want it to act as a transparent tap for all traffic moving through both sides of the bridge. What I also want is to have the "green zone" accessible to a web interface for the bridge that will display all results of the IDS and other network monitoring tools. My example would be as such: eth0 <--> bridge(br0) <--> eth1 The entire network would be on the same subset however anything coming from eth0 to eth1 would be accepted. The only time anything would be drop is if the eth0 attempted to access br0. If someone attempts to access the web interface on br0 through eth1 it will succeed. My biggest problem I feel is if I attempt to block anything from eth0 to br0 this will drop the bridge all together.

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• How to backup/restore excluding filestream varbinary in SQL Server 2008?

  - by fdierre

  There is an application used in a production site that uses SQL Server 2008 as its DBMS. The database schema uses Filestream Varbinary to save binary data on the filesystem instead of directly into the DB tables. The point is that now and then it would be useful to copy the production database on development machines, mostly for doing troubleshooting. The database is too big for comfortably moving it around, but it would be ok if it could be moved leaving out the filestream varbinary fields. In other words, I am trying to make an "imperfect" copy of a database: i.e., on the destination database, it is ok to have NULL values instead of the varbinary. Is this possible? I tried looking for the feature on the SQL Server Management studio and did a backup that excludes the filegroup containing the filestream varbinary, but I cannot restore: MSSMS complains that the restore cannot be done because the backup is incomplete (of course). Is it possible to achieve what I am trying to do in some way?

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• Windows 7 Connection Sharing unable to access some sites

  - by Kristopher Ives

  I have a pretty sad networking situation that involves connecting to an open Wireless network and sharing that connection to an Ethernet that is plugged into a Linksys router. This has been done with XP and Windows 7, and it works great with XP. The problem with Windows 7 is that only some DNS will work. I don't know if it's been poisoned on the network above us (which we have no control over), but we've tried clearing the DNS cache as well as moving to using Google's DNS servers (8.8.8.8, 8.8.4.4). Here is a really quick list of sites that won't respond to DNS requests at all via dig, although if I get the IP address I can ping them: facebook.com yuilibrary.com twitter.com A lot of sites do work though. Anyone have an idea? It may be a subnet problem? If anyone wants more info let me know.

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• jQuery Star Rating plugin - select in callback causes infinite loop

  - by Ian

  Using the jQuery Star Rating plugin everything works well until I select a star rating from the rating's callback handler. Simple example: $('.rating').rating({ ... callback: function(value){ $.ajax({ type: "POST", url: ... data: {rating: value}, success: function(data){ $('.rating').rating('select', 1); } }); } }); I'm guessing this infinite loop occurs because the callback is fired after a manual 'select' as well. Once a user submits their rating I'd like to 'select' the average rating across all users (this value is in data returned to the success handler). How can I do this without triggering an infinite loop?

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• Changing Windows public folder in batch script.

  - by Angus

  I've installed Steam on an external hard drive so I can play games on different computers by just moving the drive around. Since save games are often saved in My Documents or AppData, but I want them to move with the external hard drive, I wrote a batch file that sets environment variables before starting steam. setocal set USERPROFILE=%EXTERNAL_LETTER%\Profile\Me set APPDATA=%USERPROFILE%\AppData\Roaming ... start %TARGETAPP% endlocal I'm not sure if this is the right way to do this on Windows, but it seems to work. However, one game saves its games in the Shared Documents folder. I've tried setting %PUBLIC% and %ALLUSERSPROFILE% but that does not seem to affect where the game looks. Is it possible to make this one program use a different Shared Documents folder, either by environment variables or some other means? The change in Shared Documents should only affect the one program, I do not want it to be a permanent or system wide change to Windows.

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• Getting AveragePower and PeakPower for a Channel in AVAudioRecorder

  - by Biranchi

  Hi all, I am annoyed with this piece of code. I am trying to get the averagePowerForChannel and peakPowerForChannel while recording Audio, but every time i am getting it as 0.0 Below is my code for recording audio : NSMutableDictionary *recordSetting =[[NSDictionary alloc] initWithObjectsAndKeys:[NSNumber numberWithFloat: 22050.0], AVSampleRateKey, [NSNumber numberWithInt: kAudioFormatLinearPCM], AVFormatIDKey, [NSNumber numberWithInt: 1], AVNumberOfChannelsKey, [NSNumber numberWithInt: AVAudioQualityMax], AVEncoderAudioQualityKey, [NSNumber numberWithInt:32],AVLinearPCMBitDepthKey, [NSNumber numberWithBool:NO],AVLinearPCMIsBigEndianKey, [NSNumber numberWithBool:NO],AVLinearPCMIsFloatKey, nil]; recorder1 = [[AVAudioRecorder alloc] initWithURL:[NSURL fileURLWithPath:audioFilePath] settings:recordSetting error:&err]; recorder1.meteringEnabled = YES; recorder1.delegate=self; [recorder1 prepareToRecord]; [recorder1 record]; levelTimer = [NSTimer scheduledTimerWithTimeInterval: 0.3f target: self selector: @selector(levelTimerCallback:) userInfo: nil repeats: YES]; - (void)levelTimerCallback:(NSTimer *)timer { [recorder1 updateMeters]; NSLog(@"Peak Power : %f , %f", [recorder1 peakPowerForChannel:0], [recorder1 peakPowerForChannel:1]); NSLog(@"Average Power : %f , %f", [recorder1 averagePowerForChannel:0], [recorder1 averagePowerForChannel:1]); } What is the error in the code ???

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• Why would only the cpu fan not spin and no video displayed?

  - by Patrick

  I just built a new computer and when I first powered it on I got a continuous beeping which according to the manual means a power failure. After moving the voltage switch to the left a little I was able to get the beeping to stop. Even after the stopping though the CPU fan doesn't spin, and there is no display on the monitor. All the other fans and lights come on in the computer though, the DVD drive is working and ejects the tray, and the hard drive sounds like it spins up. Has anyone seen this before and know what is wrong or what has failed?

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• SumProduct over sets of cells (not contiguous)

  - by Craig

  I have a total data set that is for 4 different groupings. One of the values is the average time, the other is count. For the Total I have to multiply these and then divide by the total of the count. Currently I use: =SUM(D32*D2,D94*D64,D156*D126,D218*D188)/SUM(D32,D94,D156,D218) I would rather use a SumProduct if I can to make it more readable. I tried to do: =SUMPRODUCT((D2,D64,D126,D188),(D32,D94,D156,D218))/SUM(D32,94,D156,D218) But as you can tell by my posting here, that did not work. Is there a way to do SumProduct like I want? Thoughts, Answers, Questions, Comments? Craig

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• Building v8 without JIT

  - by rames

  Hello, I would like to run some tests on v8 with and without JIT to compare performances. I know JIT will improve my average speed performance, but it would be nice for me to have some actual more detailed tests results as I want to work with mobile platforms. I haven't found how to enable or disable JIT like it exists on Squirrelfish (cf. ENABLE_JIT in JavaScriptCore/wtf/Platform.h). Does somebody knows how to do that with v8? Thanks. Alexandre

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• Prolific USB-to-Serial Comm Port significantly slower under Windows 7 comparing to Windows XP

  - by Dmitry S

  I am using a Prolific USB-to-Serial adapter based on the Prolific chip to use with a device on serial port. I have the latest version of the driver installed: 1.3.0 (2010-7-15). When I use my device with this adapter on my main Windows 7 (32bit) system it takes 8-9 seconds to send a command through to the device. However, when I do the same thing on a different Windows XP system (an old laptop I borrowed for testing) it only takes 2-3 seconds. I have made sure that the port settings and other variables are the same between systems. I also tested on a third laptop (also running Windows 7) and again got a significant delay. So the question is if anyone else experienced the same problem and found a solution. I would like to avoid moving to an XP system for what I need to achieve so that's my last option.

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• Use trackball to scroll, zoom, etc

  - by filledvoid

  I've got a Logitech Marble Trackball (which is great, btw). By setting one of the extra buttons as a "middle" mouse button, when I click it, many apps (like browsers) will start "scrolling mode" so that moving the trackball will scroll up and down. Most of the time, this is sufficient, but I figure it would be way cooler if I could have several "modes" to do different things like zooming, panning, rotating (particularly in GIMP). Then when I hold CTRL, CTRL+SHIFT, or some such, it would enter a new mode, and the trackball would behave differently. I found a couple questions similar to this that suggest using AutoHotKey, but I haven't found an example script to do this, nor can I find out to track mouse movements within AHK. Any pointers? hotkey for scrollwheel remedy for a no scroll wheel trackball? Thanks!

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• Laptop wakes from sleep, once, due to audio controller (Windows 7)

  - by stijn

  The laptop is a recent Dell XPS 15z and the problem is as follows (reproducible about 90% of tries): put laptop to sleep using either Start-Sleep or closing the lid laptop goes to sleep after about 5 seconds, but instantly wakes again showing a black screen (touching the keyboard or moving the mouse shows the login screen one normally gets after wake) login again, put laptop to sleep latop stays in sleep mode output of powercfg -lastwake after the first instant wake shows the audio controller is responsible. Why would that be, why only the first try, and how to fix this? Wake History Count - 1 Wake History [0] Wake Source Count - 1 Wake Source [0] Type: Device Instance Path: PCI\VEN_8086&DEV_1C20&SUBSYS_04461028&REV_05\3&11583659&0&D8 Friendly Name: Description: High Definition Audio Controller Manufacturer: Microsoft

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• How to implement SCORM in Objective C

  - by iranjan

  Hey, Do you know how to implement SCORM (Sharable Content Object Reference Model) in Objective C for eLearning content? Let me explain you what exactly I am looking for. I have one MCQ (multiple choice question) application which has 4 questions. On attempting each question I want my application to interact with a SCORM compatible server with result (whether the user has attempted correct one or not). The communication channel should be to and fro. May be at the end of the MCQ I want to show result which will come from the server with some calculations*(like Score : 85% number of attempts : 16 average score:16.7% etc.)*. How should I go about it? Please guide if you have already achieved it regards Ranjan.

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• How to change controller numbering/enumeration in Solaris 10?

  - by Jim

  After moving a Solaris 10 server to a new machine, the rpool disk is now c1t0d0. We have some third party applications hard coded for c0t0d0. How can I change the controller enumeration on this machine? There is no longer a c0. I've tried rebuilding the /etc/path_to_inst, but the instance numbers don't seem to match up with the controller numbers. Also, it's not clear if i86pc platforms use this file. I've tried devfsadm -C to clear the dangling links, but I'm not sure how to cause devfsadm to start numbering from 0 again (or force certain devices in the tree to a specific controller number). Next I am going to try to create the symlinks manually in /dev/dsk and rdsk to point to the correct /devices. I feel like I am going way off path here. Any suggestions? Thanks

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• How to route HyperV VMs traffic through host VPN

  - by Random

  I'm using Windows 8.1 Pro with HyperV. I have several VMs for development, all of them connected with host via Internal adapter using network addresses: 192.168.10.0/24 Where: 192.168.10.1 is my host's Hyper-V internal NIC address. When I'm not in my office I use 3G usb dongle an dialup VPN connection. I would like to route traffic from all existing and future VMs through the VPN. In best scenario traffic would be routed only partially to the local company network addresses 10.1.1.0/24 I don't want to use sharing because I'm switching between WiFi, USB 3G dongle and VPN. Moving to other virtualization is also not an option for me.

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• Vim style cursor movement for Notepad++

  - by funseiki

  I was just wondering if there was a way to get "vim" style cursor movement (i.e. 'hkjl' movement). After spending much time with vim, I have gotten used to not having to life my hands off the keyboard to move around a text document (going to the arrow keys is also too disruptive :p). Moving back to vim is always an option, but if there was a way to get this feature on notepad++. I have already spent some time in setting up macros and plugins to get my notepad++ environment working the way I want it to. Any help on this matter would be much appreciated.

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• Cursor moves when left or right clicking on trackpad

  - by n00b

  I'm on an acer aspire v5-572p. When I am using the touchpad, and I left or right click something, the cursor moves every time by a couple pixels because unfortunately the clicking area, is also a touch area. I've tried switching to the synaptics mouse drivers provided on the Acer driver website, but the same problem exist. I have researched this problem and there is a fix for this issue in Ubuntu, but I am running Windows 8.1 x64. The problem also existed when I was on 8.0 How do I stop the cursor from moving on a click?

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• Metaprograming - self explanatory code - tutorials, articles, books

  - by elena

  Hello everybody, I am looking into improving my programming skils (actually I try to do my best to suck less each year, as our Jeff Atwood put it), so I was thinking into reading stuff about metaprogramming and self explanatory code. I am looking for something like an idiot's guide to this (free books for download, online resources). Also I want more than your average wiki page and also something language agnostic or preferably with Java examples. Do you know of such resources that will allow to efficiently put all of it into prectice (I know experience has a lot to say in all of this but i kind of want to build experience avoiding the flow bad decitions - experience - good decitions)? Thank you!

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• I want to change hard drive. How to move system partition with Windows 7?

  - by Semyon Perepelitsa

  I've bought a new hard drive and want to move all my data to it. I had no problem with moving all files on non-system partition. But I don't know how to move system partiton. Now I have 3 partitions on the new disk, fist two was created by Windows installation CD (I tried to move system using internal tools, but it didn't work for me), third is filled with my successfully transferred data from old disk. And there are two partitions on the old disk: the first one is system (Windows 7) and the second one is my old main storage, that I already moved to the new hard drive and now it is empty. How can I change the placement of Windows 7 with minimal difficulties and losses, so I could work on the new hard drive just as I did it on the old one?

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• Can I put a laptop Core i7 CPU in a desktop?

  - by Weezy

  One of the most important thing to me for a CPU is a good mix between speed and heat. For example five years ago I bought a Core 2 Duo 6300 (max TDP 65W): I put a big heatsink on the CPU, no fans (I do hate moving parts and noise) and it worked like a charm and very silently for five years (and it still work but five years later I wouldn't mind a faster CPU and a faster memory controller and more memory). I consider a max TDP of 130W unacceptable (like some high-end Core i7 have), for several reasons. So I was wondering: can I build a desktop and put a Core i7 CPU meant to be used in laptop in it? For example I was thinking about the Core i7 740QM (max TDP 45W [!]). Are these compatible with desktop Core i7 motherboards? (for example on NewEgg it says that the "CPU socket type" for the Core i7 740QM is PGA988, I've not too sure about what this is)

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• What's wrong with Lotus Notes / Lotus Domino?

  - by user20242

  I have a client who is using Lotus Domino for their web application/server platform. The client has two "web developers" who are more comfortable with Lotus Domino than more mainstream tools and technologies and are not enthusiastic about making a switch. I have been asked to provide an assessment of why it may be prudent to migrate to a different web application platform. I would be particularly interested in understanding deficiencies related to the platform as I have very little knowledge of Domino but am very familiar with other platforms. In addition to the fact that Apache has over 70% of web server market, IIS over 21%, and Lotus almost 0%, what other reasons would you give for moving away from this platform?

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