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• Newbie, deciding Python or Erlang

  - by Joe

  Hi Guys, I'm a Administrator (unix, Linux and some windows apps such as Exchange) by experience and have never worked on any programming language besides C# and scripting on Bash and lately on powershell. I'm starting out as a service provider and using multiple network/server monitoring tools based on open source (nagios, opennms etc) in order to monitor them. At this moment, being inspired by a design that I came up with, to do more than what is available with the open source at this time, I would like to start programming and test some of these ideas. The requirement is that a server software that captures a stream of data and store them in a database(CouchDB or MongoDB preferably) and the client side (agent installed on a server) would be sending this stream of data on a schedule of every 10 minutes or so. For these two core ideas, I have been reading about Python and Erlang besides ruby. I do plan to use either Amazon or Rackspace where the server platform would run. This gives me the scalability needed when we have more customers with many servers. For that reason alone, I thought Erlang was a better fit(I could be totally wrong, new to this game) and I understand that Erlang has limited support in some ways compared to Ruby or Python. But also I'm totally new to the programming realm of things and any advise would be appreciated grately. Jo

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• Storing information inside YAML

  - by yuval

  I looked through the YAML for ruby documentation and couldn't find an answer. I have a list of several employees. Each has a name, phone, and email as such: Employees: Name | Phone | Email john 111 [email protected] joe 123 [email protected] joan 321 [email protected] How would I write the above information in YAML to end up with the following ruby output? employees = [ {:name => 'john', :phone => '111', :email => '[email protected]'}, {:name => 'joe', :phone => '123', :email => '[email protected]'}, {:name => 'joan', :phone => '321', :email => '[email protected]'} ] This is how I parse the YAML file: APP_CONFIG = YAML.load_file("#{RAILS_ROOT}/config/config.yml") Thank you!

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• Modal MessageBox for ASP.NET without jQuery

  - by Joe

  I have an assembly with custom ASP.NET server controls that is used in several, mostly in-house, ASP.NET 2.0 applications. The server controls use simple modal popup messageboxes, which are currently implemented using the javascript alert and confirm functions. I want to release a new version of this assembly that uses a better solution for messageboxes, including support for Yes/No buttons. The appearance would be something like a simplified version of the Ajax Control Toolkit ModalPopup extender (sample here). My constraints are that this should be as easy as possible to integrate into existing ASP.NET 2.0 applications without introducing new dependencies: ideally just drop in a new version of the assembly, that contains all the javascript it needs as an embedded resource, and possibly a CSS file. Because of this constraint, I am not considering solutions I've seen that use jquery, or the ASP.NET Ajax Control Toolkit, which appears to require adding elements to pages that use the extenders (ScriptManagers and the like). Any recommendations?

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• jQuery .each() with multiple selectors - skip, then .empty() elements

  - by joe

  I'd like to remove all matching elements, but skip the first instance of each match: // Works as expected: removes all but first instance of .a jQuery ('.a', '#scope') .each ( function (i) { if (i > 0) jQuery (this).empty(); }); // Expected: removal of all but first instance of .a and .b // Result: removal of *all* instances of both .a and .b jQuery ('.a, .b', '#scope') .each ( function (i) { if (i > 1) jQuery (this).empty(); }); <div id="scope"> <!-- Want to keep the first instance of .a and .b --> <div class="a">[bla]</span> <div class="b">[bla]</span> <!-- Want to remove all the others --> <div class="a">[bla]</span> <div class="b">[bla]</span <div class="a">[bla]</span> <div class="b">[bla]</span ... </div> Any suggestions? Using jQuery() rather than $() because of conflict with 'legacy' code Using .empty() because .a contains JS I'd like to disable Stuck with jQuery 1.2.3 Thanks you!

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• Problem with openssl_get_privatekey returning false

  - by Joe Corkery

  I am trying to generate a signed url for Amazon's CloudFront service but am running into problems in that the openssl_get_privatekey function appears to be returning false and I can't quite figure out why. Here is the code (PHP) that I am using: $priv_key = file_get_contents(path_to_my_pem_file); $priv_keyid = openssl_get_privatekey($privkey); Unfortunately, everytime I try this openssl_get_privatekey fails silently and I run into errors when I try to sign with openssl_sign later on. I've tried printing out the contents of $priv_key after it has been read in and it appears to be correct. I'm running this on RHEL 5.4 using PHP 5.2.13. I've confirmed that file pem file is readable and I've also run dos2unix on it just in case (didn't work before or after). Any thoughts would be greatly appreciated as I am relatively new to both PHP and openssl.

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• ActiveReports Conditional Formatting - Picture Visibility

  - by Joe

  In ActiveReports, how can I change formatting based on values in the report data? Specifically, I want to show or hide pictures based on a value in the data. The report gets bound to a list of objects via a set to its DataSource property. These objects have a Condition property with values "Poor", "Normal", etc. I have some pictures in the report that correspond to the different conditions, and I want to hide all the pictures except for the one corresponding to the value. Should I subscribe to the Format event for the detail section? If so, how do I get to the "current record" data?

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• Wandering CGAffineTransformMakeRotation

  - by Joe

  Okay this is about to make me insane -- any help would be appreciated. I have two images which are part of a timer application. One is the needle/hand and the other is a little hub which is styled to look like the needle base. I'm using a CGAffineTransformMakeRotation to rotate the needle and the base stays stationary. The problem: there is like a 1-2px 'wander' to the needle's rotation which makes it look like it's moving off center in relation to the base. I have worked the base and needle image over in PS extensively, and both are dead center pixel wise -- seriously. My method to rotate the hand: -(IBAction) rotateSteamArrow{ CGAffineTransform rotate = CGAffineTransformMakeRotation( degreesSteam / 180.0 * 3.14159265); degreesSteam = degreesSteam + 1.5; if (degreesSteam <= 180) { [steamNeedle setTransform:rotate]; } else { [self handleSteamTimer]; [self toggleButton:(id)timerButton]; [self switchSound]; } }

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• How to select the top n from a union of two queries where the resulting order needs to be ranked by individual query?

  - by Jedidja

  Let's say I have a table with usernames: Id | Name ----------- 1 | Bobby 20 | Bob 90 | Bob 100 | Joe-Bob 630 | Bobberino 820 | Bob Junior I want to return a list of n matches on name for 'Bob' where the resulting set first contains exact matches followed by similar matches. I thought something like this might work SELECT TOP 4 a.* FROM ( SELECT * from Usernames WHERE Name = 'Bob' UNION SELECT * from Usernames WHERE Name LIKE '%Bob%' ) AS a but there are two problems: It's an inefficient query since the sub-select could return many rows (looking at the execution plan shows a join happening before top) (Almost) more importantly, the exact match(es) will not appear first in the results since the resulting set appears to be ordered by primary key. I am looking for a query that will return (for TOP 4) Id | Name --------- 20 | Bob 90 | Bob (and then 2 results from the LIKE query, e.g. 1 Bobby and 100 Joe-Bob) Is this possible in a single query?

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• PHP Server did not recognize the value of HTTP Header SOAPAction

  - by Joe

  I am making my first SOAPclient and I am stuck with the Headers, I am getting a response and when I look at my request it has a soap:body but no soap:headers. The web service has needs 3 parameters 1.UserName 2.Password 3.errorMessage This is the code I have set up. $SOAPAction = 'http://localhost/DriveAwayPriceCalculation/PriceCalculation'; //Namespace of the WS. // $SoapHeaders = array('User123' => $UserName, 'Password123' => $Password, '' => $errorMessage); $client = new nusoap_client("https://test.com/CalculationWS.asmx?WSDL", false, $UserName, $Password, $errorMessage); $headers = new SoapHeader('http://localhost/DriveAwayPriceCalculation/PriceCalculation', true, $SoapHeaders); As I said I am just starting out in SOAP (and PHP) so if you could help, it would be great. Thanks

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• How to return model state from child action handler in ASP.NET MVC

  - by Joe Future

  In my blog engine, I have one controller action that displays blog content, and in that view, I call Html.RenderAction(...) to render the "CreateComment" form. When a user posts a comment, the post is handled by the comment controller (not the blog controller). If the comment data is valid, I simply return a Redirect back to the blog page's URL. If the comment data is invalid (e.g. comment body is empty), I want to return the ViewData with the error information back to the blog controller and through the blog view to the CreateComment action/view so I can display which fields are bad. I have this working fine via AJAX when Javascript is enabled, but now I'm working on the case where Javascript might be disabled. If I return a RedirecToAction or Redirect from the comment controller, the model state information is lost. Any ideas?

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• how can i use autoit to execute javascript in a webpage

  - by joe

  how can i use autoit to execute javascript in a webpage ? I know the javascript code I should call.

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• Entity Framework 4 relationship management in POCO Templates - More lazy than FixupCollection?

  - by Joe Wood

  I've been taking a look at EF4 POCO templates in beta 2. The FixupCollection looks fine for maintaining the model correctness after updating the relationship collection property (i.e. product.Orders it would set the order.Product reference ). But what about support for handling the scenario when some of those Order objects are removed from the context? The use-case of maintaining cascading deletes in the in-memory model. The old Typed DataSet model used to do this by performing the query through the container to derive the relationship results. Like the DataSet, this would require a reference to the ObjectContext inside the entity class so that it could query the top-level Order collection. Better support for Separation of Concerns in the ObjectContext would be required. It looks like EF is not suited to this use-case that DataSets did out of the box.... am I right?

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• how to orginazie the PERL MODULE in perl

  - by joe

  consider that i have 100 perl modules in 12 directory . but looking into main perl script . it looks like 100 use p1 ; use p2 ; like this .. How originzw to best way to slove this issue

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• Row Number for group by ?

  - by Damien Joe

  I have table structure like Category EmpName 1 Harry 1 John 1 Ford 2 James 2 Mark 2 Shane 3 Oliver 3 Ted I want results like Category EmpName RowNumber 1 Harry 1 1 John 2 1 Ford 3 2 James 1 2 Mark 2 2 Shane 3 3 Oliver 1 3 Ted 2 I am using db2 and row_number() is not working for different groups of records.

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• Using XSD to validate node count

  - by heath

  I don't think this is possible but I thought I'd throw it out there. Given this XML: <people count="3"> <person>Bill</person> <person>Joe</person> <person>Susan</person> </people> Is it possible in an XSD to force the @count attribute value to be the correct count of defined elements (in this case, the person element)? The above example would obviously be correct and the below example would not validate: <people count="5"> <person>Bill</person> <person>Joe</person> <person>Susan</person> </people>

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• Access crosstab formula field in another crosstab column?

  - by Damien Joe

  How to access crosstab formula field in another column? I have report like with Dues & total both formula fields: Amount Dues(Done by a Formula) Total (Done by a Formula) ------ ------------------------- --------------------------- 500 20 % someAmount Formula for Dues: WhileReadingRecords; numberVar due:={Command.SomeField)/100; due Formula for Total: WhileReadingRecords; numberVar total:= {Command.Amount} - due; total How do I access due field inside the second formula for each row of record?

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• Guides for PostgreSQL query tuning?

  - by Joe

  I've found a number of resources that talk about tuning the database server, but I haven't found much on the tuning of the individual queries. For instance, in Oracle, I might try adding hints to ignore indexes or to use sort-merge vs. correlated joins, but I can't find much on tuning Postgres other than using explicit joins and recommendations when bulk loading tables. Do any such guides exist so I can focus on tuning the most run and/or underperforming queries, hopefully without adversely affecting the currently well-performing queries? I'd even be happy to find something that compared how certain types of queries performed relative to other databases, so I had a better clue of what sort of things to avoid. update: I should've mentioned, I took all of the Oracle DBA classes along with their data modeling and SQL tuning classes back in the 8i days ... so I know about 'EXPLAIN', but that's more to tell you what's going wrong with the query, not necessarily how to make it better. (eg, are 'while var=1 or var=2' and 'while var in (1,2)' considered the same when generating an execution plan? What if I'm doing it with 10 permutations? When are multi-column indexes used? Are there ways to get the planner to optimize for fastest start vs. fastest finish? What sort of 'gotchas' might I run into when moving from mySQL, Oracle or some other RDBMS?) I could write any complex query dozens if not hundreds of ways, and I'm hoping to not have to try them all and find which one works best through trial and error. I've already found that 'SELECT count(*)' won't use an index, but 'SELECT count(primary_key)' will ... maybe a 'PostgreSQL for experienced SQL users' sort of document that explained sorts of queries to avoid, and how best to re-write them, or how to get the planner to handle them better. update 2: I found a Comparison of different SQL Implementations which covers PostgreSQL, DB2, MS-SQL, mySQL, Oracle and Informix, and explains if, how, and gotchas on things you might try to do, and his references section linked to Oracle / SQL Server / DB2 / Mckoi /MySQL Database Equivalents (which is what its title suggests) and to the wikibook SQL Dialects Reference which covers whatever people contribute (includes some DB2, SQLite, mySQL, PostgreSQL, Firebird, Vituoso, Oracle, MS-SQL, Ingres, and Linter).

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• Cookies not present after using XMLHttpRequest

  - by Joe B

  I'm trying to make a bookmarklet to download videos off of YouTube, but I've come across a little problem. To detect the highest quality video available, I use a sort of brute force method, in which I make requests using the XMLHttpRequest object until a 404 isn't returned (I can't do it until a 200 ok is returned because YouTube redirects to a different server if the video is available, and the cross-domain policy won't allow me to access any of that data). Once a working URL is found, I simply set window.location to the URL and the download should start, right? Wrong. A request is made, but for reasons unknown to me, the cookies are stripped and YouTube returns a 403 access denied. This does not happen if the XML requests aren't made before it, i.e. if I just set the window.location to the URL everything works fine, it's when I do the XMLHttpRequest that the cookies aren't sent. It's hard to explain so here's the script: var formats = ["37", "22", "35", "34", "18", ""]; var url = "/get_video?video_id=" + yt.getConfig('SWF_ARGS')['video_id'] + "&t=" + (unescape(yt.getConfig('SWF_ARGS')['t'])) + "&fmt="; for (var i = 0; i < formats.length; i++) { xmlhttp = new XMLHttpRequest; xmlhttp.open("HEAD", url + formats[i], false); xmlhttp.send(null); if (xmlhttp.status != 404) { document.location = url + formats[i]; break } } That script does not send the cookies after setting the document.location and thus does not work. However, simply doing this: document.location = /get_video?video_id=" + yt.getConfig('SWF_ARGS')['video_id'] + "&t=" + (unescape(yt.getConfig('SWF_ARGS')['t'])) DOES send the cookies along with the request, and does work. The only downside is I can't automatically detect the highest quality, I just have to try every "fmt" parameter manually until I get it right. So my question is: why is the XMLHttpRequest object removing cookies from subsequent requests? This is the first time I've ever done anything in JS by the way, so please, go easy on me. ;)

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• Where to find changes from iphone OS 3.0 to 3.1.3

  - by Joe

  I've developed an app using the 3.1.3 SDK and I want to set the deployment target to OS 3.0. The app uses iPod functionality which I can't test on the Simulator so my question is: Is there somewhere I can find a list of the changes from 3.0 to 3.1.3 so I can check if anything might be broken on an OS 3.0 device? I've looked on Apple's website obviously but can't find anything. How do people normally test on old software releases?

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• MS Surface drag & drop SurfaceListBoxItems

  - by Joe G

  Hey guys I'm working on the Microsoft Surface Table and I'm attempting to drag an item from 1 SurfaceListBox to another and recognize which SurfaceListBoxItem the other SurfaceListBoxItem was dropped on top of. The SDK help as a great tutorial for dragging items from 1 SurfaceListBox to the next and just adding the content and removing it from the other. If I set AllowDrop=True on the SurfaceListBoxItem the SurfaceListBox still captures the drop. If I set it to false on the SurfaceListBox it doesn't recognize the drop at all. Somehow I need to bury deeper on that drop or something.

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• Can't connect to SQL Server 2008 - looks like Shared Memory problem

  - by Proposition Joe

  I am unable to connect to my local instance of SQL Server 2008 Express using SQL Server Management Studio. I believe the problem is related to a change I made to the connection protocols. Before the error occurred, I had Shared Memory enabled and Named Pipes and TCP/IP disabled. I then enabled both Named Pipes and TCP/IP, and this is when I started experiencing the problem. When I try to connect to the server with SSMS (with either my SQL server sysadmin login or with windows authentication), I get the following error message: A connection was successfully established with the server, but then an error occurred during the login process. (provider: Named Pipes Provider, error: 0 - No process is on the other end of the pipe.) (Microsoft SQL Server, Error: 233) Why is it returning a Named Pipes error? Why would it not just use Shared Memory, as this has a higher priority order in the list of connection protocols? It seems like it is not listening on Shared Memory for some reason? When I set Named Pipes to enabled and try to connect, I get the same error message. My windows account is does not have administrator priviliges on my computer - perhaps this is making a difference in some way (as some of the discussions in this post about an "SuperSocketNetLib\Lpc" registry key seems to suggest).

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• CSS Caching and User-CUstomized CSS - Any Suggestions?

  - by Joe

  I'm just trying to figure out the best approach here... my consideration is that I'd like my users to be able to customize the colors of certain elements on the page. These are not pre-made css they can choose from, but rather styles that can be edited using javascript to change the style, so they cannot be "pre-made" into separate style sheets. I am also generating the css into a cache directory since I am generating the css through a PHP script. I am thinking that, perhaps I should: 1) If cached css file doesn't exist, create css file using the website default style settings. 2) If cached css file does exist, check if user has custom settings, if so, edit the cache file before displaying it. Btw, when I refer to "cached file" I mean the PHP generated css document. My goal is to prevent the need to have PHP re-generate the css file each time, whilst still allowing users, when logged in, to have their customized css settings applied. I will store these settings in a database most likely so when they return it is saved for them when they login.

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• HQL to get elements that possess all items in a set

  - by Tauren

  Currently, I have an HQL query that returns all Members who possess ANY Award from a set of specified Awards: from Member m left join m.awards as a where a.name in ("Trophy","Ribbon"); What I now need is HQL that will return all Members who possess ALL Awards specified in the set of Awards. So, assuming this data: Joe has Trophy, Medal Sue has Trophy, Ribbon Tom has Trophy, Ribbon, Medal The query above would return Joe, Sue, and Tom because all three possess at least one of Trophy or Ribbon. But I need to return only Sue and Tom, because they are the only ones who possess all of the specified awards (Trophy and Ribbon). Here's the class structure (simplified): class Member { private String name; private Set<Award> awards; } class Award { private String name; }

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• How to fix width of DIV that contains floated elements?

  - by joe

  I have a DIV container with several inner DIVs layed out by floating them all left. The inner DIVs may change width on certain events, and the containing DIV adjusts accordingly. I use float:left in the container to keep it shrunk to the width of the inner divs. I use float:left in the inner divs so the layout is clean even when their contents change. The catch is that I want the DIV container width and height to remain constant, UNLESS a particular event causes a change to the inner widths. Conceptually I want to use float on the inners for the layout benefit, but then I want to "fix" them so they don't float around. So if the container is 700px wide, I want it to remain so even if the user narrows the browser window. I'd like the container, and it's internal DIVs to just be clipped by the browser window. I sense this can all be done nicely in CSS, I just can't quite figure out how. I'm not averse to adding another container if necessary... Since the only desired layout changes are event-based, I am also willing to use a bit of JS. But is this necessary? (And I'm still not sure I know what to modify: container dimensions? inner floatiness? other?) <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html> <head> <style type="text/css"> #canvas { overflow:auto; /* for clearing floats */ } #container { float:left; /* so container shrinks around contained divs */ border:thin solid blue; } .inner { float:left; /* so inner elems line up nicely w/o saying fixed coords */ padding-top:8px; padding-bottom:4px; padding-left:80px; padding-right:80px; } #inner1 { background-color:#ffdddd; } #inner2 { background-color:#ddffdd; } #inner3 { background-color:#ddddff; } </style> </head> <body> <div id="canvas"> <div id="container"> <div id="inner1" class="inner"> inner 1 </div> <div id="inner2" class="inner"> inner 2 </div> <div id="inner3" class="inner"> inner 3 </div> </div> </div> cleared element </body> </html>

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• IE6 "frame" layout with 100% height and scrollbars

  - by Joe

  I want to achieve a simple "frame" layout with fixed header, fixed left navigation area, and a main content area that fills 100% of the remainder of the viewport with scrollbars if necessary. My best attempt is below - but when I add enough content to the main div to force scrolling, I see that the scrollbar extends below the bottom of the viewport. What am I doing wrong? Or what is IE6 doing wrong and how can I fix it? NB please don't recommend using a more recent browser - I'd love to but can't. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head> <title></title> <style type="text/css"> html, body { height:100%; margin:0; padding:0; overflow:hidden; } div { border:0; margin:0; padding:0; } div#top { background-color:#dddddd; height:100px; } div#left { background-color:#dddddd; float:left; width:120px; height:100%; overflow:hidden; } div#main { height:100%; overflow:auto; } </style> </head> <body> <div id="top">Title</div> <div id="left">LeftNav</div> <div id="main"> Content <p> Lorem ipsum ... </p> ... repeated several times ... </div> </body> </html>

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