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• Erlang Question - Time order of messages

  - by Aiden Bell

  Read (skimmed enough to get coding) through Erlang Programming and Programming Erlang. One question, which is as simple as it sounds: If you have a process Pid1 on machine m1 and a billion million messages are sent to Pid1, are messages handled in parallel by that process (I get the impression no) and(answered below) is there any guarantee of order when processing messages? ie. Received in order sent? If so, how is clock skew handled in high traffic situations for ordering? Coming from the whole C/Thread pools/Shared State background ... I want to get this concrete. I understand distributing an application, but want to ensure the 'raw bones' are what I expect before building processes and distributing workload. Also, am I right in thinking the whole world is currently flicking through Erlang texts ;)

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• Order ArrayList by attribute object the ArrayList holds?

  - by Tom

  How do I order an ArrayList of objects by one of the objects attributes?

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• How can we use order by in SQLite

  - by Nidhi

  There is two field in my data base id(primary key) and name. I want arrange my data in descending order by using id

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• Twitter Streaming API - tracking exact multiple keywords in exact order

  - by Gublooo

  Hey Guys, I'm just beginning to play with the Twitter Streaming API. If I specify $sc-setTrack(array('just bought from')); This will correctly pull only tweets that have all 3 keywords - but doesn't maintain the order. 1) I want the keywords to appear in the same order like "I just bought apple from itunes" but the above also returns tweets like "I bought some apples and just removed them from the bag" 2) Is there a way to specify the exact words say "NBA basketball" with nothing in between - in the sense I dont want tweets like this to be returned Watching basketball on NBA tv I just want tweets which contain the exact phrase to be returned like I love watching NBA basketball 3) Also is there a way to specify negative keywords Any tips if this is possible. Thanks

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• MySQL LEFT JOIN, GROUP BY and ORDER BY not working as required

  - by Simon

  I have a table 'products' => ('product_id', 'name', 'description') and a table 'product_price' => ('product_price_id', 'product_id', 'price', 'date_updated') I want to perform a query something like SELECT `p`.*, `pp`.`price` FROM `products` `p` LEFT JOIN `product_price` `pp` ON `pp`.`product_id` = `p`.`product_id` GROUP BY `p`.`product_id` ORDER BY `pp`.`date_updated` DESC As you can probably guess the price changes often and I need to pull out the latest one. The trouble is I cannot work out how to order the LEFT JOINed table. I tried using some of the GROUP BY functions like MAX() but that would only pull out the column not the row. Thanks.

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• Stored Procedure - forcing execution order

  - by meepmeep

  I have a stored procedure that itself calls a list of other stored procedures in order: CREATE PROCEDURE [dbo].[prSuperProc] AS BEGIN EXEC [dbo].[prProc1] EXEC [dbo].[prProc2] EXEC [dbo].[prProc3] --etc END However, I sometimes have some strange results in my tables, generated by prProc2, which is dependent on the results generated by prProc1. If I manually execute prProc1, prProc2, prProc3 in order then everything is fine. It appears that when I run the top-level procedure, that Proc2 is being executed before Proc1 has completed and committed its results to the db. It doesn't always go wrong, but it seems to go wrong when Proc1 has a long execution time (in this case ~10s). How do I alter prSuperProc such that each procedure only executes once the preceding procedure has completed and committed? Transactions?

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• How to repair "order by" after union of 2 selects from 1 tables

  - by 4e4el

  I have a dropDownList on my form, where i need to have union of values from 2 colums of table [ost]. Type of this columns is currency. I have russian version of access, default value of curency in "rur" and i need "uah". I need to change format and save "order by". I use this query: (SELECT distinct FORMAT([Sum1] ,'# ##0.00" uah.";-# ##0.00" uah."') FROM ost) Union (SELECT distinct FORMAT([Sum2],'# ##0.00" uah.";-# ##0.00" uah."') FROM ost) ORDER BY 1

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• Getting req.params in order in Express JS

  - by Adam Terlson

  In Express, is there a way to get the arguments passed from the matching route in the order they are defined in the route? I want to be able to apply all the params from the route to another function. The catch is that those parameters are not known up front, so I cannot refer to each parameter by name explicitly. app.get(':first/:second/:third', function (req) { output.apply(this, req.mysteryOrderedArrayOfParams); // Does this exist? }); function output() { for(var i = 0; i < arguments.length; i++) { console.log(arguments[i]); } } Call on GET: "/foo/bar/baz" Desired Output (in this order): foo bar baz

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• Need help with a sub query/group/order (get latest comment for each ordered topic)

  - by Scarface

  Hey guys I have a query that currently finds the latest comment for each of a user's topics and then orders topics by that comment's timestamp. What I want to do is expand on this query's use and print the latest comment for each topic. The problem with this query is that while it orders the topics correctly, it prints seemingly random comments for each topic. I am trying to implement a sub query but I am not quite sure how to approach it. I was thinking that I just had to somehow use this query to get the comments. If anyone has any ideas I would really appreciate it. Here is what I think I need to add SELECT * FROM comments where topic_id='$topic_id' ORDER BY timestamp DESC LIMIT 1 Here is the query I need to modify SELECT topic.topic_title, topic.content_type, topic.subject_id, topic.creator, topic.description, topic.topic_id,comments.message,comments.user FROM comments JOIN topic ON topic.topic_id = comments.topic_id WHERE topic.creator = '$user' AND comments.timestamp > $week GROUP BY topic_id ORDER BY MAX(comments.timestamp) DESC

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• In VS, how can i decide the order in which my overloaded methods are displayed

  - by greattvs

  How can i decide the order in which my overloaded methods are displayed in visual studio, in the intellisense

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• Level Order Successor of node in BST

  - by dsiap

  How can we find level order successor of a node in bst if parent pointer is given(with out using Queue ) ?

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• How to do Group By in grails to order by Count(*)

  - by skurt

  How do I translate: SELECT COUNT(*) AS `count`, `a` FROM `b` GROUP BY `a` ORDER BY `a` into grails or gorm query?

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• Mulitple words in any order using regex

  - by RC1140

  As the title says , i need to find 2 specific words in a sentence. But they can be in any order and any casing. How do i go about doing this using regex. E.g. This is a very long sentence used as a test From that sentence i need to extract the words test and long in any order i.e. test can be first or long can be first. UPDATE: What i did not mention the first part is it needs to be case insensitive as well

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• How to do Group By in grails to order bei Count(*)

  - by skurt

  How do I translate: SELECT COUNT(*) AS `count`, `a` FROM `b` GROUP BY `a` ORDER BY `a` into grails or gorm query?

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• Select photo while keep the order

  - by wong2

  I have a list of photo on the page, each have an unique id, user can click on them to toggle select the photo, when they click the submit button, I need to send the array of selected photo ids to the back end, in the order that the photo was selected. I think that the fastest way to track if a photo is selected is to use an object that use photo id as key, like: var selected = { "6272861": true, "6272888": true } when the user unselect a photo, I just need to delete selected["6272861"]. But this will ignore the order, if I use an array to keep the selected photos: var selected = ["6272861", "6272888"]; then when I need to unselect a photo, I have to loop through the array and delete the item. Is there better ways? thanks.

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• SELECT * , COUNT( * ) FROM GROUP BY ORDER BY DESC

  - by quanganh_developer

  I have a table like: gold gold_city | gold_type | gold_selltime ------------------------------------- city1 | type 1 | 2012-01-01 city1 | type 1 | 2012-02-02 city1 | type 1 | 2012-03-03 city2 | type 2 | 2012-01-01 city2 | type 2 | 2012-02-02 city2 | type 2 | 2012-03-03 city3 | type 3 | 2012-01-01 city3 | type 3 | 2012-02-02 city3 | type 3 | 2012-03-03 How can I get 1 last result order by gold_selltime desc each group by gold_city and gold_type I used this: SELECT * , COUNT( * ) FROM gold_2012 GROUP BY gold_type , gold_city ORDER BY gold_selltime DESC but it did work. I only have result like: gold_city | gold_type | gold_selltime ------------------------------------- city1 | type 1 | 2012-01-01 city2 | type 2 | 2012-01-01 city3 | type 3 | 2012-01-01 but I need it like: gold_city | gold_type | gold_selltime ------------------------------------- city1 | type 1 | 2012-03-03 city2 | type 2 | 2012-03-03 city3 | type 3 | 2012-03-03

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• Complex data ordering...

  - by Povylas

  Hi, I have one tables ids in an array and they are ordered in the way I want and I have to select data from another table using those ids and in a order they are listen in the array. Pretty confusing but I was thinking of two solutions giving ORDER BY parameter the array but I do not know if that possible and another is to get all the necessary data and then turn it to array (mysql_fetch_assoc) then compare those two and somehow order the new array using the ids array. But I also do not know how to do this... Any ideas?

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• installing windows on mac mini.

  - by sagar

  Please - please, don't start down voting after reading the question title. Hey ! Please first of read out the question. I brought a whole new mac mini as I am an iPhone developer - I prefer to use it. But most of my family members are not used to with mac osx. They don't know how to operate os x. Managing files Opening documents Browser & many many other issues. It's not their age to learn more, people like us ( computer geek ) can easily get into new systems. I had many attempted efforts to teach them for all these above topics in windows. Summary, Of all these, I know how to use mac, but they don't know. They stair like I am making private & bad usage of mac. In short, I just want to install windows. So, that they can feel that mac mini is for all members not for just me. Original Question Dual Boot windows & os x on mac mini ? Is it possible ? How ? Does it void warranties of apple ?

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• How to run some commands after booting from ArchLinux disk? Or how to change some settings in .iso before booting?

  - by Alexander Ovchinnikov

  How to install Arch Linux with traditional installer with only ssh-access to server? There is nice guide: https://wiki.archlinux.org/index.php/Install_from_SSH I try test this on my home vps: Start VPS with any linux bootable cd and login to remote server (vps) wget http://mirrors.kernel.org/archlinux/iso/latest/archlinux-2010.05-netinstall-x86_64.iso dd if=archlinux-2010.05-netinstall-x86_64.iso of=/dev/sda reboot ... I see, it works but without ssh connection... I need make script, which will send this commands after reboot: aif -p partial-configure-network (and write some information about my server ip etc.) /etc/rc.d/sshd start (need to start sshd) echo "sshd: ALL" /etc/hosts.allow (to allow me login to server, by default deny all) passwd (by default its empty, can't login via ssh with empty password) Can I edit .iso or may be /dev/sda? May be I need write script, which will start after system boot and do this things or may be I can set this settings by default and system will start with correct settings (i think its possible at least in 2. and 3.). Thank you!

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• Fixing partitions and Installing BackTrack

  - by Josh

  My whole problem started when I started trying to install Backtrack(3 or 4) Backtrack was trying to install itself over my entire windows partition (Which I had combined into one when I installed windows 7). So I booted back into windows 7 on my netbook (eee pc 1000 HE btw) I went into disk-manager with the aim of making a partition to install backtrack on but came out with a really screwed up drive. So I had two partions when I started: the windows system partition, and then my main partition and they were blue in diskmanager (I think that has something to do with formatting). After I went through the steps to make a 10 GB FAT32 partition for backtrack I had about five partitons one called PE: that I have no Idea what it is the windows system file, my main partiton 10 GB unallocated space, and two other partions under 50MB each that are both unused space. And they were all converted to simple volumes (Green instead of blue). And backtrack still wants to erase my entire drive. Question number 1: How do I get it back to the way it was? Question 2: How to I get backtrack to dual boot on my netbook?

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• W2K INACCESSIBLE_BOOT_DEVICE, with System Commander

  - by Gary Kephart

  I have a system that was originally had Win NT. I added System Commander (SC7) and then added W2K. The relevant partitions are: 0 - Primary - MultiFAT (Has Win NT, mapped to C:) 1 - Extended - with many logical partitions: 1.1 NTFS which has W2K and is mapped to D: 1.2 other logical partitions which are irrelevant to this D: was getting full. It needed room for virus definitions and Windows upgrades. In the past, I had simple used SC7 to resize D: without problems. So I did it again this time. However, upon finishing, I got the message "Unable to create partition". It also marked the partition as unformatted. I checked that the files on the disk were still there using SC7's Partition Explorer, and they were there. I continued and the system managed to boot up fine anyways. Then I rebooted the system again. This time, I got a message saying "INACCESSIBLE_BOOT_DEVICE". I went back in to SC7 and to Partition Commander, and it was still saying that the partition was unformatted but the Partition Explorer still showed the files on the system. I finally decided to resize the partition again, figuring that this would force a rewrite of the partition information. That seemed to work, until I had to reboot again. Now I can't see the files using Partition Explorer, and the Resize button is now disabled. What now?

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• Vista gets stuck in an endless loop while booting

  - by Mason Wheeler

  I put my laptop to sleep last night, and when I woke up this morning... it didn't. So I tried to reboot, and everything went fine until it got to the Vista splash screen, where it's supposed to display the logon. Here, it hits an endless loop: Display the cursor with the blue spinny thing that replaced the hourglass, for 5-10 seconds Display "Please wait..." for about half a second Screen flashes to black, then quickly back to the Vista splash screen Goto step 1 The whole time, my hard LED is on almost non-stop. I can boot into Safe Mode... sometimes. Sometimes it'll load all the drivers, then sit there for about 10 minutes, spinning the hard drive non-stop, then reboot with no warning. I tried booting to Last Known Good Configuration. Didn't fix anything. When I've managed to get into Safe Mode, I tried running CHKDSK. Didn't fix anything. I tried running System Restore to each of my last two restore points. Didn't fix anything either time. I ran a virus scan. Didn't find anything. I tried calling the manufacturer (Alienware), only to discover that my warranty expired last freaking week and now I can't get it fixed without paying exorbitant sums of money. I'm about at my wits' end here. Has anyone seen this problem before? Does anyone know how to fix it? Does anyone know a solution that does not involve reinstalling the OS and losing an entire year's worth of program installations, Windows Updates and configuring and tweaking things until it's working just like I want it to?

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• Firefox crash on first load on Ubuntu Linux on Windows Laptop

  - by Ira Baxter

  I've had a Dell Latitude laptop since about 2000 without managing to destroy it. A month ago the Windows 2000 system on it did something stupid to its file system and Windows was completely lost. No point in reinstalling Windows 2000, so I installed an Ubuntu Linux on the laptop. Everything seems normal (installed, rebooted, I can log in, run GnuChess, poke about). ... but ... when I attempt to launch Firefox from the top bar menu icon, I get a bunch of disk activity, the whirling cursor icon goes round a bit and then everything stops: disk, icon, mouse. Literally nothing happens for 5 minutes. Ubuntu is dead, as far as I can tell. A reboot, and I can repeat this reliably. So on the face of it, everything works but Firefox. That seems really strange. The only odd thing about this system when Firefox is booting is that while it has an Ethernet port (that worked fine under Windows), it isn't actually plugged into an Ethernet. As this is the first Firefox boot since the Ubuntu install, maybe Firefox mishandles Internet access? Why would that crash Ubuntu? (I need to go try the obvious experiment of plugging it in).

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• Firefox crash on first load on Ubuntu Linux on older Dell Laptop

  - by Ira Baxter

  I've had a Dell Latitude laptop since about 2000 without managing to destroy it. A month ago the Windows 2000 system on it did something stupid to its file system and Windows was completely lost. No point in reinstalling Windows 2000, so I installed an Ubuntu Linux on the laptop. Everything seems normal (installed, rebooted, I can log in, run GnuChess, poke about). ... but ... when I attempt to launch Firefox from the top bar menu icon, I get a bunch of disk activity, the whirling cursor icon goes round a bit and then everything stops: disk, icon, mouse. Literally nothing happens for 5 minutes. Ubuntu is dead, as far as I can tell. A reboot, and I can repeat this reliably. So on the face of it, everything works but Firefox. That seems really strange. The only odd thing about this system when Firefox is booting is that while it has an Ethernet port (that worked fine under Windows), it isn't actually plugged into an Ethernet. As this is the first Firefox boot since the Ubuntu install, maybe Firefox mishandles Internet access? Why would that crash Ubuntu? (I need to go try the obvious experiment of plugging it in).

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• Hardware issue: computer plays beep sounds at startup, and then turns off

  - by Darkkurama

  Turns out that after moving, my computer got damaged somehow. I installed my computer 2 days ago. I didn't check the state of the hardware parts and turned the pc on recklessly, not realizing that the cpu fan was dettached from the cpu. After this I reattached the fan. The computer worked kind of faulty after that, because at the time of startup, it would play a long beep (different from the normal beep) and won't display anything. I tried restarting after this incident and it got fixed (don't know how, but it did), and I was even able to play some videogames for some hours (more than 5). This morning I tried to get this issue sorted out by checking again the cpu and in general, the connections, and for my surprise, at the time of turning it on again, the computer wouldn't boot at all. I reapplied some thermal paste to the cpu and fan, but got no results (I did this because the old paste was very badly distributted along the surface of both cpu and fan). Now every time I turn it on, the computer acts randomly: sometimes at startup, it plays a long continous beep and then turns off. one time it played a long continous beep and got to the windows password input screen, but then it turned off More frequently, I turn it on and after some seconds, it turns off without any sound. You can check this video I recorded, which features how the computer behaves most of the time Another one I tried troubleshoting it myself by disconnecting my graphic card, rams, HDD and even the cpu and its fan with no result. Computer specs: Intel Core 2 Quad Q6600 processor, Nvidia xfx gtx 260 black edition, 4 GB ram, 500 GB hard drive, Windows 7 64 bit

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