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Amazon ELB CNAME record not working

- by BarthQuay

Hi there, I have set up my EC2 infrastructure behind an ELB instance and by using the ELBs DNS name everything works as expected. Now i wanted to forward a subdomain of my main project domain to the ELBs DNS Name with a CNAME entry. I did this about 12 hours ago and it doesnt seem to work, and i dont know why. The subdomain just cant be resolved. This is the DNS entry which was processed from my DNS provider without errors yesterday: @ IN A 111.111.111.111 localhost IN A 127.0.0.1 mail IN A 111.111.111.111 www IN A 111.111.111.111 ftp IN CNAME www beta IN CNAME myelbnamehere.eu-west-1.elb.amazonaws.com imap IN CNAME www loopback IN CNAME localhost pop IN CNAME www relay IN CNAME www smtp IN CNAME www @ IN MX 10 mail Using nslookup, all the subdomains and main domain gets looked up correctly, but beta.domain.com doesnt. I get "** server can't find beta.domain.com: NXDOMAIN" What am i doing wrong ? Do i need to wait longer ? When i use the ELB DNS name directly everything works as expected. When i do an NSlookup on my providers DNS Server, the CNAME gets resolved, but it looks like any other DNS server cant find the subdomain thanks in advance

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How to pass a reference to a JS function as an argument to an ExternalInterface call?

- by Ryan Wilson

Summary I want to be able to call a JavaScript function from a Flex app using ExternalInterface and pass a reference to a different JavaScript function as an argument. Base Example Given the following JavaScript: function foo(callback) { // ... do some stuff callback(); } function bar() { // do some stuff that should happen after a call to foo } I want to call foo from my flex app using ExternalInterface and pass a reference to bar as the callback. Why Really,foo is not my function (but, rather, FB.Connect.showBookmarkDialog), which due to restrictions on Facebook iframe apps can only be called on a button click. My button, for design reasons, is in the Flex app. Fortunately, it's possible to call ExternalInterface.call("FB.Connect.showBookmarkDialog", callback) to display the bookmark dialog. But, FB.Connect.showBookmarkDialog requires a JS callback so, should I want to receive a callback (which I do), I need to pass a reference to a JS function as the single argument. Real Example MXML: <mx:Button click="showBookmarkDialog();" /> ActionScript: function showBookmarkDialog() : void { ExternalInterface.registerCallback( "onBookmarkDialogClosed", onBookmarkDialogClosed ); ExternalInterface.call( "FB.Connect.showBookmarkDialog", /* ref to JS function onBookmarkDialogClosed ? */ ); } function onBookmarkDialogClosed(success:Boolean) : void { // sweet, we made it back } JavaScript: function onBookmarkDialogClosed() { var success; // determine value of success getSWF().onBookmarkDialogClosed(success); } Failed Experiments I have tried... ExternalInterface.call( "FB.Connect.showBookmarkDialog", "onBookmarkDialogClosed" ); ExternalInterface.call( "FB.Connect.showBookmarkDialog", onBookmarkDialogClosed ); ExternalInterface.call( "FB.Connect.showBookmarkDialog", function() : void { ExternalInterface.call("onBookmarkDialogClosed"); } ); ExternalInterface.call( "FB.Connect.showBookmarkDialog", function() { this["onBookmarkDialogClosed"](); } ); Of note: Passing a string as the argument to an ExternalInterface call results in FB's JS basically trying to do `"onBookmarkDialogClosed"()` which, needless to say, will not work. Passing a function as the argument results in a function object on the other side (confirmable with `typeof`), but it seems to be an empty function; namely, `function Function() {}`

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Google App Engine on Google Apps Domain

- by Bob Ralian

I'm having trouble getting my domain pointed to my website hosted with google app engine. Here's the background... take care to separate the concepts of "google apps" (domain hosting, email, etc.) and "google app engine" (website framework). I have a domain that's using Google Apps for Your Domain, let's call it company.com. So my login for my google apps account is [email protected]. I have a different domain that is aliased back to my google apps account, let's call it mycompany.com. It's been successfully aliased and registered with my primary google apps account using the cname method, and has updated mx records. We have a ton of domains, and I only want to use one "google apps" account to maintain them all. Now I have a website I've built using google app engine, and the url is effectively mycompany.appspot.com. I want to get mycompany.com to point to my website that currently resides at mycompany.appspot.com. There's a spot in the google app engine dashboard under application settings where you can add a domain. So I click there and enter mycompany.com and I get an error message saying that domain is not using google apps. If I back up to the page I submitted, there's a note saying I need to register the domain with google apps. So I click the link to do that and enter mycompany.com and I get an error message saying the domain has been registered and is in the process of ownership verification. But that process is already finished. So... what do I do? Does google app engine not support a domain that is only aliased to a primary google apps account? Does mycompany.com need to have its own primary google apps account?

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HTTPService/ResultEvent with Flex 3.2 versus Flex >= 3.5

- by Julian

Hey everybody, through a design decission or what-so-ever Adobe changed the content of the ResultEvent fired by a HTTPService Object. Take a look at following example: var httpService:HTTPService = myHTTPServices.getResults(); httpService.addEventListener(ResultEvent.RESULT,resultHandler); httpService.send(); /** * Handels the login process */ function resultHandler(event:ResultEvent):void { // get http service var httpService = (event.target as HTTPService); // do something } It works like a charm with Flex 3.2. But when I try to compile it with Flex 3.5 or Flex 4.0 event.target as HTTPService is null. I figured out that event.target is now an instance of HTTPOperation. That is interesting because I can't find HTTPOperation in the langref. However, I think what Flash Builder's debugger means is mx.rpc.http.Operation. The debugger also shows that event.target has a private attribute httpService which is the instance I expected to get with event.target. But it's private, so event.target.httpService doesn't work. If I only want to remove the EventListener I can cast event.target as EventDispatcher. But I need to use methods from HTTPService. So: How can I get the HTTPService instance from the ResultEvent? Any help would be appreciated. Thanks! J.

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DateChooser is behaving strangly

- by Tam

Hi, I'm writing a Flex application and I came accross what I think is a weird problem. I want to create a text box and a DateChooser as the datefield didn't do what I wanted and it's Halo so I can't skin it easily. I want the DateChooser to show when I click on the text input. Here is except from my code: <s:TextInput id="wholeDate" width="100" mouseOver="stopChangeToNormal();" paddingRight="10" click="date1.visible = true" focusOut="date1.visible = false"/> <s:Button label="Go" width="70" /> </s:Panel> <mx:DateChooser id="date1" visible = "false" change="useDate(event);" mouseOver="changeToNormalState = false;" y="{wholeDate.y + buttonsGroup.y + 20}" x="{wholeDate.x + buttonsGroup.x - 175 }" /> The weird thing is that it work as I wanted if I make it visible = "true" to start but if I have it visible="false" it doesn't work! it shows by the date I select doesn't show in the box as it does if I have it as visible="true" but I don't want it to be visible initially. Any ideas? Thanks, Tam

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How to capture page with google map?

- by Max

I have a UIComponent with Google map in the continer. I need to capture this container for making a preview. My integration looks like the following: <mx:UIComponent id="mapContainer" width="410" height="300" /> googleMap = new Map(); mapContainer.addChild(googleMap); But if I do("this" - is my UIComponent) var bmd:BitmapData = new BitmapData(this.width, this.height, true, 0x00ffffff); bmd.draw(this); I see the following: An ActionScript error has occurred: SecurityError: Error #2123: Security sandbox violation: BitmapData.draw: http://localhost/ cannot access http://mt1.google.com/vt/lyrs=m@121&hl=en&src=api&x=1&y=1&z=1&s=Gali. No policy files granted access. at flash.display::BitmapData/draw() I now, that I can to add it host to allowed on the custom client. But I need to have working system on any computer ) I've tried to hide it: templateGoogleMapRenderer.mapContainer.setVisible(false); templateGoogleMapRenderer.mapContainer.includeInLayout = false; But it was unsuccessfully. May be I can override some method in my UIComponent, that flex use during BitmapData/draw() ? Capture with hidden map is success result for me )

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How to handle custom Java exception in Flex app.

- by mico

Hello, we are using BlazeDS as a proxy between Flex and Java. The approach is the same as in (http://www.flexpasta.com/index.php/2008/05/16/exception-handling-with-blazeds-and-flex/) Java exception declaration: public class FlexException extends RuntimeException { private String name = 'John'; public FlexException(String message) { super(message); } public String getName() { return name; } } Then, we are throwing it: public void testMethod(String str) throws Exception { throw new FlexException("Custom exception"); } Flex part: private function faultHandler(event:FaultEvent):void { var errorMessage:ErrorMessage = event.message as ErrorMessage; trace("error++"); } and remote object is instantiated here: <mx:RemoteObject id="mySample" destination="mySample" channelSet="{cs1}" fault="faultHandler(event)" /> But in event.fault I get "Server.Processing" and event.faultString equals "There was an unhandled failure on the server. Custom exception" How can I receive the data is specified in exception props ? BlazeDS log is similar to the log that was mentioned in the comment [BlazeDS] 11:28:13.906 [DEBUG] Serializing AMF/HTTP response Version: 3 (Message #0 targetURI=/2/onStatus, responseUR|-) (Typed Object #0 ‘flex.messaging.messages.ErrorMessage’) headers = (Object #1) rootCause = null body = null correlationId = “2F1126D7-5658-BE40-E27C-7B43F3C5DCDD” faultDetail = null faultString = “Login required before authorization can proceed.” clientId = “C4F0E77C-3208-ECDD-1497-B8D070884830? timeToLive = 0.0 destination = “books” timestamp = 1.204658893906E12 extendedData = null faultCode = “Client.Authentication” messageId = “C4F0E77C-321E-6FCE-E17D-D9F1C16600A8? So the quesion is why rootClause is null? How can I get that Exception object not just a string 'Custom exception'?

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Equivalent of Flex DataBinding using Pure Actionscript

- by Joshua

What is the ActionScript equivalent of this? <mx:Label text="Hello {MyVar} World!"/> In ActionScript it would need it to look something like this: var StringToBind="Hello {MyVar} World!"; // I've Written It This Way Because I Don't Know The Exact Text To Be Bound At Design Time. [Bindable] var MyVar:String='Flex'; var Lab:Label=new Label(); Lab.text=??? ... SomeContainer.addChild(Lab); How can I accomplish this kind of "Dynamic" binding... Where I don't know the value of "StringToBind" until runtime? For the purposes of this question we can assume that I do know that any variable mentioned in "StringToBind", is guaranteed to exist at runtime. I already realize there are much more straightforward ways to accomplish this exact thing STATICALLY, and using only Flex. It's important for my project though that I understand how this could be accomplished using purely ActionScript.

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Python fit polynomial, power law and exponential from data

- by Nadir

I have some data (x and y coordinates) coming from a study and I have to plot them and to find the best curve that fits data. My curves are: polynomial up to 6th degree; power law; and exponential. I am able to find the best fit for polynomial with while(i < 6): coefs, val = poly.polyfit(x, y, i, full=True) and I take the degree that minimizes val. When I have to fit a power law (the most probable in my study), I do not know how to do it correctly. This is what I have done. I have applied the log function to all x and y and I have tried to fit it with a linear polynomial. If the error (val) is lower than the others polynomial tried before, I have chosen the power law function. Am I correct? Now how can I reconstruct my power law starting from the line y = mx + q in order to draw it with the original points? I need also to display the function found. I have tried with: def power_law(x, m, q): return q * (x**m) using x_new = np.linspace(x[0], x[-1], num=len(x)*10) y1 = power_law(x_new, coefs[0], coefs[1]) popt, pcov = curve_fit(power_law, x_new, y1) but it seems not to work well.

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GMail appearing to ignore Reply-To.

- by Samuurai

I'm using a gmail account to send emails from my website. I'm using the same account to pick up emails which are generated by the contact facility on my site. I'm using the Reply-To field to attempt to make it easier to hit reply and easily get back to people. The message comes up with the 'from' address and ignores the 'reply-to' address. Here's my header: Return-Path: <[email protected]> Received: from svr1 (ec2-79-125-266-266.eu-west-1.compute.amazonaws.com [79.125.266.266]) by mx.google.com with ESMTPS id u14sm23273123gvf.17.2010.03.10.14.33.24 (version=TLSv1/SSLv3 cipher=RC4-MD5); Wed, 10 Mar 2010 14:33:25 -0800 (PST) Received: from localhost ([127.0.0.1] helo=www.rds.com) by aquacouture with esmtp (Exim 4.69) (envelope-from <[email protected]>) id 1NpUSx-0001dK-JM for [email protected]; Wed, 10 Mar 2010 22:33:23 +0000 User-Agent: CodeIgniter Date: Wed, 10 Mar 2010 22:33:23 +0000 From: "New Inquiry" <[email protected]> Reply-To: "Beren" <[email protected]> To: [email protected] Subject: =?utf-8?Q?Test?= X-Sender: [email protected] X-Mailer: CodeIgniter X-Priority: 3 (Normal) Message-ID: <[email protected]> Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="B_ALT_4b981e3390ccd" This is a multi-part message in MIME format. Your email application may not support this format. --B_ALT_4b981e3390ccd Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit test --B_ALT_4b981e3390ccd Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable test --B_ALT_4b981e3390ccd--

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flashvars object was not working in mozilla browser

- by praveen

Hi,I am retrieving an flashvars object from JSP file. Like userid = mx.core.Application.application.parameters.userJspid;like this it is retrieving in IE browser. But not in FF (Mozilla), why it’s not retrieving is there any code i need to add it for Mozilla specially. Please help me in this, Thanks in advance. i am loading in jsp like <body scroll="no" onload="openWin();"> <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" id="main" width="100%" height="100%" codebase="http://fpdownload.macromedia.com/get/flashplayer/current/swflash.cab"> <param name="movie" value="main.swf"/> <param name="quality" value="high"/> <param name="bgcolor" value="#ffffff"/> <param name="allowScriptAccess" value="sameDomain"/> <param name="FlashVars" value="userNid=<%=session.getAttribute("userNid")%>"/> <embed src="main.swf" quality="high" bgcolor="#ffffff"width="100%" height="100%" name="main" align="middle" play="true" loop="false" quality="high" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.adobe.com/go/getflashplayer"></embed> </object> </body>like this

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Can I create template-based library objects in Dreamweaver CS5?

- by Danjah

At work we need two 'streams' of template. The first are general layout templates, like the ones already available in the MX through CS5 packages (except we'd have our own customised ones). The second are more granular objects, some of which are functional. In both cases, I don't want Jimmy to be able to wreak havoc inside anything other than the 'editable regions' which make up the templates. Now this is fine if I stick with the first scenario (layout templates) where there's simply a big chunk of editable region for good ole Jim to sprawl into, think of this as the 'body content' area. But I really do need these granular library (or snippet) objects to work in the same way. Unfortunately with my attempts so far they don't work as I'd have thought - perhaps for good reason? When I create a blank template and throw in my chunk of HTML (unobstrusive JS and external CSS use selectors in this HTML to provide style and function) and save it as a new library item or snippet, all looks well. Then I create a new document based on a layout template and save it as a plain html file (still all good so far). Next I drop in my custom library item... still all good... but then I go to save the document and it only allows me to save it as a new template! I expected it would just allow me to save it as HTML and have it simply respect the defined editable regions, as happens in the containing page 'body content' editable region. Apologies if that got specific and technical quite quickly, but it is quite particular. If you want some example files lemme know and I'll zip some up. Many thanks :) p.s It is not a requirement that library objects must somehow inject their dependency files into the newly created page - I already know what they'll be. Also, I know I must 'detatch from original' once I drop a library item into a document which then allows customisation of the library object.

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NonStop ODBC: how the connections (ODBC servers) are assigned to CPUs?

- by Vladimir Dyuzhev

We have an ODBC pool running on a NonStop server. The pool is connected to SQL/MX. This pool is used by a few external Java applications, each of which has an JDBC pool connected to ODBC pool (e.g. 14 connections per application). With time (after a few application recycles) we see an imbalance between CPUs -- some have 8 ODBC processes running, some only 5. That leads to CPU time imbalance too. Up to this point we assumed that a CPU is assigned to ODBC process in round-robin fashion. That would maintain the number of ODBC processes more or less equally distributed. It's not the case though. Is there any information on how ODBC pool decided which CPU to choose for every new allocated process? Does it look at CPU load? Available memory? Something else? Sadly, even HP's own people (available to us, that is) couldn't answer those questions with certainty. :-(

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what dataprovider in flex (aside from ArrayCollection) will work for single, non-repeating XML nodes

- by Rees

hello, i asked this question before but haven't been able to get an answer.. i get the following error when i retrieve an XML that only has 1 node (no repeating nodes) from a PHP page and i try to store in an ArrayCollection. -When I have MORE than 1 "name" nodes...i do NOT get an error. TypeError: Error #1034: Type Coercion failed: cannot convert "XXXXXX" to mx.collections.ArrayCollection. this error occurs as the line of code: myList= e.result.list.name; I'm using this ArrayCollection as a dataprovider for a Component -is there an alternative I can use that will take BOTH single and repeating nodes as well as work as a dataprovider? Thanks in advance! code: [Bindable] private var myList:ArrayCollection= new ArrayCollection(); private function getList(e:Event):void{ var getStudyLoungesService:HTTPService = new HTTPService(); getStuffService.url = "website.com/asdf.php"; getStuffService.addEventListener(ResultEvent.RESULT, onGetList); getStuffService.send(); } private function onGetList(e:ResultEvent):void{ myList= e.result.list.name; }

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Send email using GMail SMTP server from PHP page

- by skb

I am trying to send an email via GMail's SMTP server from a PHP page but I get this error: authentication failure [SMTP: SMTP server does no support authentication (code: 250, response: mx.google.com at your service, [98.117.99.235] SIZE 35651584 8BITMIME STARTTLS ENHANCEDSTATUSCODES PIPELINING)] Can anyone help? Here is my code: <?php require_once "Mail.php"; $from = "Sandra Sender <[email protected]>"; $to = "Ramona Recipient <[email protected]>"; $subject = "Hi!"; $body = "Hi,\n\nHow are you?"; $host = "smtp.gmail.com"; $port = "587"; $username = "[email protected]"; $password = "testtest"; $headers = array ('From' => $from, 'To' => $to, 'Subject' => $subject); $smtp = Mail::factory('smtp', array ('host' => $host, 'port' => $port, 'auth' => true, 'username' => $username, 'password' => $password)); $mail = $smtp->send($to, $headers, $body); if (PEAR::isError($mail)) { echo("<p>" . $mail->getMessage() . "</p>"); } else { echo("<p>Message successfully sent!</p>"); } ?>

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Flex redrawing background when Scrolling, degrafa: How ?.

- by coulix

Hi Everyone, I am using a canvas which has a degrafa background, so far so good. However when scrolling apears the background (degrafa grid) does not get redrawn. In the code the bg strokes are linked to the container height. The thing is container.height does not change even when scrolling. How do i get the heigh of the whole area so i can set the new height to my degrafa background ? it looks like this. <mx:Canvas id="blackBoard" width="100%" height="100%" x="0" y="0" backgroundColor="#444444" clipContent="true">  <degrafa:Surface id="boardSurfaceContainer"> <degrafa:strokes> <degrafa:SolidStroke id="whiteStroke" color="#EEE" weight="1" alpha=".2"/> </degrafa:strokes>  <degrafa:GeometryGroup id="grid"> <degrafa:VerticalLineRepeater count="{blackBoard.width / ApplicationFacade.settings.GRID_SIZE}" stroke="{whiteStroke}" x="0" y="0" y1="{blackBoard.height}" offsetX="0" offsetY="0" moveOffsetX="{ApplicationFacade.settings.GRID_SIZE}" moveOffsetY="0"/> <degrafa:HorizontalLineRepeater count="{blackBoard.height / ApplicationFacade.settings.GRID_SIZE}" stroke="{whiteStroke}" x="0" y="0" x1="{blackBoard.width}" offsetX="0" offsetY="0" moveOffsetX="0" moveOffsetY="{ApplicationFacade.settings.GRID_SIZE}"/> </degrafa:GeometryGroup> </degrafa:Surface>

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Receiving generic typed <T> custom objects through remote object in Flex

- by Aaron

Is it possible to receive custom generic typed objects through AMF? I'm trying to integrate a flex app with an existing C# service but flex is choking on custom generic typed objects. As far as I can tell Flex doesn't even support generics, but I'd like to be able to even just read in the object and cast its members as necessary. I basically just want flex to ignore the <T>. I'm hopeful that there's a way to do this, since flex doesn't complain about typed collections (a server call returning List works fine and flex converts it to an ArrayCollection just like an un-typed List). Here's a trimmed down example of what's going on for me: The custom C# typed class public class TypeTest<T> { public T value { get; set; } public TypeTest () { } } The server method returning the typeTest public TypeTest<String> doTypeTest() { TypeTest<String> theTester = new TypeTest<String>("grrrr"); return theTester; } The corresponding flex value object: [RemoteClass(alias="API.Model.TypeTest")] public class TypeTest { private var _value:Object; public function get value():Object { return _value; } public function set value(theValue:Object):void { _value = value; } public function TypeTest() { } } and the result handler code: public function doTypeTest(result:TypeTest):void { var theString:String = result.value as String; trace(theString); } When the result handler is called I get the runtime error: TypeError: Error #1034: Type Coercion failed: cannot convert mx.utils::ObjectProxy@11a98041 to com.model.vos.TypeTest. Irritatingly if I change the result handler to take parameter of type Object it works fine. Anyone know how to make this work with the value object? I feel like i'm missing something really obvious.

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SparkDataContainer Scroller not scrolling to bottom of container

- by AZSL

I am using a scroller component within a custom skin for a SkinnableDataContainer. I am running into an issue in that the thumbbar of the scroller stops at about the 50% point, however this is actually the end of the scrollable area. In actuality, the thumbbar should be at the bottom of the scroll track. Here's the code for the scroller: <s:SparkSkin xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/halo" bottom="150" >  <s:states> <s:State name="normal" /> <s:State name="disabled" /> </s:states>  <fx:Metadata> [HostComponent("spark.components.SkinnableDataContainer")] </fx:Metadata>  <s:Rect left="0" right="0" bottom="0" top="0" radiusX="4" radiusY="4" > <s:fill> <s:SolidColor id="fillColor" color="0xEFEFEF"/> </s:fill> </s:Rect> <s:Group width="905" height="395" id="mainGroup"> <s:Scroller left="10" right="10" top="4" bottom="10" > <s:DataGroup id="dataGroup" /> </s:Scroller> <s:Rect left="0" right="0" top="0" bottom="0"> <s:stroke> <s:SolidColorStroke weight="1" color="0xD8D8D8"/> </s:stroke> </s:Rect> </s:Group>

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Optimal two variable linear regression SQL statement (censoring outliers)

- by Dave Jarvis

Problem Am looking to apply the y = mx + b equation (where m is SLOPE, b is INTERCEPT) to a data set, which is retrieved as shown in the SQL code. The values from the (MySQL) query are: SLOPE = 0.0276653965651912 INTERCEPT = -57.2338357550468 SQL Code SELECT ((sum(t.YEAR) * sum(t.AMOUNT)) - (count(1) * sum(t.YEAR * t.AMOUNT))) / (power(sum(t.YEAR), 2) - count(1) * sum(power(t.YEAR, 2))) as SLOPE, ((sum( t.YEAR ) * sum( t.YEAR * t.AMOUNT )) - (sum( t.AMOUNT ) * sum(power(t.YEAR, 2)))) / (power(sum(t.YEAR), 2) - count(1) * sum(power(t.YEAR, 2))) as INTERCEPT FROM (SELECT D.AMOUNT, Y.YEAR FROM CITY C, STATION S, YEAR_REF Y, MONTH_REF M, DAILY D WHERE -- For a specific city ... -- C.ID = 8590 AND -- Find all the stations within a 15 unit radius ... -- SQRT( POW( C.LATITUDE - S.LATITUDE, 2 ) + POW( C.LONGITUDE - S.LONGITUDE, 2 ) ) <15 AND -- Gather all known years for that station ... -- S.STATION_DISTRICT_ID = Y.STATION_DISTRICT_ID AND -- The data before 1900 is shaky; insufficient after 2009. -- Y.YEAR BETWEEN 1900 AND 2009 AND -- Filtered by all known months ... -- M.YEAR_REF_ID = Y.ID AND -- Whittled down by category ... -- M.CATEGORY_ID = '001' AND -- Into the valid daily climate data. -- M.ID = D.MONTH_REF_ID AND D.DAILY_FLAG_ID <> 'M' GROUP BY Y.YEAR ORDER BY Y.YEAR ) t Data The data is visualized here (with five outliers highlighted): Questions How do I return the y value against all rows without repeating the same query to collect and collate the data? That is, how do I "reuse" the list of t values? How would you change the query to eliminate outliers (at an 85% confidence interval)? The following results (to calculate the start and end points of the line) appear incorrect. Why are the results off by ~10 degrees (e.g., outliers skewing the data)? (1900 * 0.0276653965651912) + (-57.2338357550468) = -4.66958228 (2009 * 0.0276653965651912) + (-57.2338357550468) = -1.65405406 I would have expected the 1900 result to be around 10 (not -4.67) and the 2009 result to be around 11.50 (not -1.65). Thank you!

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Should I be worried about a ReDOS attack?

- by PeeHaa

Can the following code be use to ReDOS attack my site? Or will it just be ended when the max_execution_time is exceeded or is it a problem of the past? I use the following code to validate emailaddresses on my sites (by Douglas Lovell): function validate_email($email) { $isValid = true; $atIndex = strrpos($email, "@"); if (is_bool($atIndex) && !$atIndex) { $isValid = false; } else { $domain = substr($email, $atIndex+1); $local = substr($email, 0, $atIndex); $localLen = strlen($local); $domainLen = strlen($domain); if ($localLen < 1 || $localLen > 64) { // local part length exceeded $isValid = false; } else if ($domainLen < 1 || $domainLen > 255) { // domain part length exceeded $isValid = false; } else if ($local[0] == '.' || $local[$localLen-1] == '.') { // local part starts or ends with '.' $isValid = false; } else if (preg_match('/\\.\\./', $local)) { // local part has two consecutive dots $isValid = false; } else if (!preg_match('/^[A-Za-z0-9\\-\\.]+$/', $domain)) { // character not valid in domain part $isValid = false; } else if (preg_match('/\\.\\./', $domain)) { // domain part has two consecutive dots $isValid = false; } else if(!preg_match('/^(\\\\.|[A-Za-z0-9!#%&`_=\\/$\'*+?^{}|~.-])+$/', str_replace("\\\\","",$local))) { // character not valid in local part unless // local part is quoted if (!preg_match('/^"(\\\\"|[^"])+"$/', str_replace("\\\\","",$local))) { $isValid = false; } } if ($isValid && !(checkdnsrr($domain,"MX") || checkdnsrr($domain,"A"))) { // domain not found in DNS $isValid = false; } } return $isValid; }

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Optimal two variable linear regression SQL statement

- by Dave Jarvis

Problem Am looking to apply the y = mx + b equation (where m is SLOPE, b is INTERCEPT) to a data set, which is retrieved as shown in the SQL code. The values from the (MySQL) query are: SLOPE = 0.0276653965651912 INTERCEPT = -57.2338357550468 SQL Code SELECT ((sum(t.YEAR) * sum(t.AMOUNT)) - (count(1) * sum(t.YEAR * t.AMOUNT))) / (power(sum(t.YEAR), 2) - count(1) * sum(power(t.YEAR, 2))) as SLOPE, ((sum( t.YEAR ) * sum( t.YEAR * t.AMOUNT )) - (sum( t.AMOUNT ) * sum(power(t.YEAR, 2)))) / (power(sum(t.YEAR), 2) - count(1) * sum(power(t.YEAR, 2))) as INTERCEPT FROM (SELECT D.AMOUNT, Y.YEAR FROM CITY C, STATION S, YEAR_REF Y, MONTH_REF M, DAILY D WHERE -- For a specific city ... -- C.ID = 8590 AND -- Find all the stations within a 5 unit radius ... -- SQRT( POW( C.LATITUDE - S.LATITUDE, 2 ) + POW( C.LONGITUDE - S.LONGITUDE, 2 ) ) <15 AND -- Gather all known years for that station ... -- S.STATION_DISTRICT_ID = Y.STATION_DISTRICT_ID AND -- The data before 1900 is shaky; and insufficient after 2009. -- Y.YEAR BETWEEN 1900 AND 2009 AND -- Filtered by all known months ... -- M.YEAR_REF_ID = Y.ID AND -- Whittled down by category ... -- M.CATEGORY_ID = '001' AND -- Into the valid daily climate data. -- M.ID = D.MONTH_REF_ID AND D.DAILY_FLAG_ID <> 'M' GROUP BY Y.YEAR ORDER BY Y.YEAR ) t Data The data is visualized here: Questions How do I return the y value against all rows without repeating the same query to collect and collate the data? That is, how do I "reuse" the list of t values? How would you change the query to eliminate outliers (at an 85% confidence interval)? The following results (to calculate the start and end points of the line) appear incorrect. Why are the results off by ~10 degrees (e.g., outliers skewing the data)? (1900 * 0.0276653965651912) + (-57.2338357550468) = -4.66958228 (2009 * 0.0276653965651912) + (-57.2338357550468) = -1.65405406 I would have expected the 1900 result to be around 10 (not -4.67) and the 2009 result to be around 11.50 (not -1.65). Thank you!

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Optimal two variable linear regression calculation

- by Dave Jarvis

Problem Am looking to apply the y = mx + b equation (where m is SLOPE, b is INTERCEPT) to a data set, which is retrieved as shown in the SQL code. The values from the (MySQL) query are: SLOPE = 0.0276653965651912 INTERCEPT = -57.2338357550468 SQL Code SELECT ((sum(t.YEAR) * sum(t.AMOUNT)) - (count(1) * sum(t.YEAR * t.AMOUNT))) / (power(sum(t.YEAR), 2) - count(1) * sum(power(t.YEAR, 2))) as SLOPE, ((sum( t.YEAR ) * sum( t.YEAR * t.AMOUNT )) - (sum( t.AMOUNT ) * sum(power(t.YEAR, 2)))) / (power(sum(t.YEAR), 2) - count(1) * sum(power(t.YEAR, 2))) as INTERCEPT, FROM (SELECT D.AMOUNT, Y.YEAR FROM CITY C, STATION S, YEAR_REF Y, MONTH_REF M, DAILY D WHERE -- For a specific city ... -- C.ID = 8590 AND -- Find all the stations within a 15 unit radius ... -- SQRT( POW( C.LATITUDE - S.LATITUDE, 2 ) + POW( C.LONGITUDE - S.LONGITUDE, 2 ) ) < 15 AND -- Gather all known years for that station ... -- S.STATION_DISTRICT_ID = Y.STATION_DISTRICT_ID AND -- The data before 1900 is shaky; insufficient after 2009. -- Y.YEAR BETWEEN 1900 AND 2009 AND -- Filtered by all known months ... -- M.YEAR_REF_ID = Y.ID AND -- Whittled down by category ... -- M.CATEGORY_ID = '001' AND -- Into the valid daily climate data. -- M.ID = D.MONTH_REF_ID AND D.DAILY_FLAG_ID <> 'M' GROUP BY Y.YEAR ORDER BY Y.YEAR ) t Data The data is visualized here: Question The following results (to calculate the start and end points of the line) appear incorrect. Why are the results off by ~10 degrees (e.g., outliers skewing the data)? (1900 * 0.0276653965651912) + (-57.2338357550468) = -4.66958228 (2009 * 0.0276653965651912) + (-57.2338357550468) = -1.65405406 I would have expected the 1900 result to be around 10 (not -4.67) and the 2009 result to be around 11.50 (not -1.65). Related Sites Least absolute deviations Robust regression Thank you!

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How can I get a static URL to a map image using the Google Static Maps API?

- by Argote

=== BACKGROUND === Hello, so I've published a Web-App (still in "Beta") which uses the Flickr API to get information for the photos of a particular Flickr user and generates IPB code to post any of his/her images. While Flickr now gives you the IPB code to show the image and link back to the photo site directly on its site, my App also has the option of embeding the title, description, select EXIF data, location information, etc. into the post for the IPB forum. === PROBLEM === I've most recently added the option to integrate a Google Maps image of the photo's geolocation data into the post by using the Google Static Maps API. The problem is that the image URL I have is in the following form (including IPB [IMG] tags): [IMG]http://maps.google.com/maps/api/staticmap?zoom=16&size=600x600&maptype=hybrid&markers=19.387687,-99.251732&sensor=false[/IMG] Which shows this example image (In practice the image size is user selectable): However, some IPB forums seem to not support dyamic image URLs which gives me a broken image, I'd like to replace the [IMG]http://maps.google.com/maps/api/staticmap?zoom=16&size=600x600&maptype=hybrid&markers=19.387687,-99.251732&sensor=false[/IMG] with something like [IMG]http://maps.google.com/maps/api/staticmap/map0000001.png[/IMG] which should be supported by all IPB forums. Thanks in advance for your help. In case you're interested, the most recent "released" version of my Web-App can be found here: http://flickr.argote.mx/ (The changes I mention here are still on local development server).

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Remove redundant SQL code

- by Dave Jarvis

Code The following code calculates the slope and intercept for a linear regression against a slathering of data. It then applies the equation y = mx + b against the same result set to calculate the value of the regression line for each row. Can the two separate sub-selects be joined so that the data and its slope/intercept are calculated without executing the data gathering part of the query twice? SELECT AVG(D.AMOUNT) as AMOUNT, Y.YEAR * ymxb.SLOPE + ymxb.INTERCEPT as REGRESSION_LINE, Y.YEAR as YEAR, MAKEDATE(Y.YEAR,1) as AMOUNT_DATE FROM CITY C, STATION S, YEAR_REF Y, MONTH_REF M, DAILY D, (SELECT ((avg(t.AMOUNT * t.YEAR)) - avg(t.AMOUNT) * avg(t.YEAR)) / (stddev( t.AMOUNT ) * stddev( t.YEAR )) as CORRELATION, ((sum(t.YEAR) * sum(t.AMOUNT)) - (count(1) * sum(t.YEAR * t.AMOUNT))) / (power(sum(t.YEAR), 2) - count(1) * sum(power(t.YEAR, 2))) as SLOPE, ((sum( t.YEAR ) * sum( t.YEAR * t.AMOUNT )) - (sum( t.AMOUNT ) * sum(power(t.YEAR, 2)))) / (power(sum(t.YEAR), 2) - count(1) * sum(power(t.YEAR, 2))) as INTERCEPT FROM ( SELECT AVG(D.AMOUNT) as AMOUNT, Y.YEAR as YEAR, MAKEDATE(Y.YEAR,1) as AMOUNT_DATE FROM CITY C, STATION S, YEAR_REF Y, MONTH_REF M, DAILY D WHERE $X{ IN, C.ID, CityCode } AND SQRT( POW( C.LATITUDE - S.LATITUDE, 2 ) + POW( C.LONGITUDE - S.LONGITUDE, 2 ) ) < $P{Radius} AND S.STATION_DISTRICT_ID = Y.STATION_DISTRICT_ID AND Y.YEAR BETWEEN 1900 AND 2009 AND M.YEAR_REF_ID = Y.ID AND M.CATEGORY_ID = $P{CategoryCode} AND M.ID = D.MONTH_REF_ID AND D.DAILY_FLAG_ID <> 'M' GROUP BY Y.YEAR ) t ) ymxb WHERE $X{ IN, C.ID, CityCode } AND SQRT( POW( C.LATITUDE - S.LATITUDE, 2 ) + POW( C.LONGITUDE - S.LONGITUDE, 2 ) ) < $P{Radius} AND S.STATION_DISTRICT_ID = Y.STATION_DISTRICT_ID AND Y.YEAR BETWEEN 1900 AND 2009 AND M.YEAR_REF_ID = Y.ID AND M.CATEGORY_ID = $P{CategoryCode} AND M.ID = D.MONTH_REF_ID AND D.DAILY_FLAG_ID <> 'M' GROUP BY Y.YEAR Question How do I execute the duplicate bits only once per query, instead of twice? The duplicate bit is the WHERE clause: $X{ IN, C.ID, CityCode } AND SQRT( POW( C.LATITUDE - S.LATITUDE, 2 ) + POW( C.LONGITUDE - S.LONGITUDE, 2 ) ) < $P{Radius} AND S.STATION_DISTRICT_ID = Y.STATION_DISTRICT_ID AND Y.YEAR BETWEEN 1900 AND 2009 AND M.YEAR_REF_ID = Y.ID AND M.CATEGORY_ID = $P{CategoryCode} AND M.ID = D.MONTH_REF_ID AND D.DAILY_FLAG_ID <> 'M' Related http://stackoverflow.com/questions/1595659/how-to-eliminate-duplicate-calculation-in-sql Thank you!

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doesn't parse xml when it's a single node

- by tag

my script.php returns this XML <all> <item> <field1>value1</field1> <field2>value2</field2> </item> <item> <field1>value1</field1> <field2>value2</field2> </item> </all> The HTTPService uses the default resultFormat="object" but I don't declare it since it's the default. Then I bind it to a List dataProvider="{getDataHTTP.lastResult.all.item}" I get no problems when the number of item returned is more than 1. But when it's only 1 item I get an error cannot convert XMLList to mx.collections.IList. I tried different solutions including trying to cast it as XMLListCollection but it still gives an error for single items. Does anyone know of a way to possibly solve this?

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