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  • Is there a way in PHP to keep a file open and process each line and subsequent lines?

    - by Chris Denman
    I want to write a php script that keeps the apache_log file open and "listen" to the log and deal with each log entry as it happens. I'm thinking that I need to open a file, get the number of lines, then do this again in a loop - and when the size is different, read the new lines and process them. Am I barking up the wrong tree, or is there a silly easy solution that I have missed? Chris

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  • autosave options in ruby on rails

    - by fregas
    is there a way to turn OFF autosave in rails? I dont' want modifications to an association to automatically save to the database UNTIL i call save on the parent object. some_parent.some_children << child #should not save, just adds to the association! some_parent.save #now parent and children are saved! It this possible or am i barking up the wrong tree?

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  • Flex/Flash 4 datagrid literally displays XML

    - by Setori
    Problem: Flex/Flash4 client (built with FlashBuilder4) displays the xml sent from the server exactly as is - the datagrid keeps the format of the xml. I need the datagrid to parse the input and place the data in the correct rows and columns of the datagrid. flow: click on a date in the tree and it makes a server request for batch information in xml form. Using a CallResponder I then update the datagrid's dataProvider. [code] <fx:Script> <![CDATA[ import mx.controls.Alert; [Bindable]public var selectedTreeNode:XML; public function taskTreeChanged(event:Event):void { selectedTreeNode=Tree(event.target).selectedItem as XML; var searchHubId:String = selectedTreeNode.@hub; var searchDate:String = selectedTreeNode.@lbl; if((searchHubId == "") || (searchDate == "")){ return; } findShipmentBatches(searchDate,searchHubId); } protected function findShipmentBatches(searchDate:String, searchHubId:String):void{ findShipmentBatchesResult.token = actWs.findShipmentBatches(searchDate, searchHubId); } protected function updateBatchDataGridDP():void{ task_list_dg.dataProvider = findShipmentBatchesResult.lastResult; } ]]> </fx:Script> <fx:Declarations> <actws:ActWs id="actWs" fault="Alert.show(event.fault.faultString + '\n' + event.fault.faultDetail)" showBusyCursor="true"/> <s:CallResponder id="findShipmentBatchesResult" result="updateBatchDataGridDP()"/> </fx:Declarations> <mx:AdvancedDataGrid id="task_list_dg" width="100%" height="95%" paddingLeft="0" paddingTop="0" paddingBottom="0"> <mx:columns> <mx:AdvancedDataGridColumn headerText="Receiving date" dataField="rd"/> <mx:AdvancedDataGridColumn headerText="Msg type" dataField="mt"/> <mx:AdvancedDataGridColumn headerText="SSD" dataField="ssd"/> <mx:AdvancedDataGridColumn headerText="Shipping site" dataField="sss"/> <mx:AdvancedDataGridColumn headerText="File name" dataField="fn"/> <mx:AdvancedDataGridColumn headerText="Batch number" dataField="bn"/> </mx:columns> </mx:AdvancedDataGrid> [/code] I cannot upload a pic, but this is the xml: [code] 2010-04-23 16:35:51.0 PRESHIP 2010-02-15 00:00:00.0 100000009 DF-Ocean-PRESHIPSUM-Quanta-PACT-EMEA-Scheduled Ship Date 20100215.csv 10053 [/code] and the xml is pretty much displayed exactly as is in the datagrid columns... I would appreciate your assistance.

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  • PHP - CURL vs fopen vs fsocketopen ?

    - by TatMing
    I would write a WordPress plugin to parse all image source and check it's broken link or not. My idea is : Select all post&page's images by regex from MySQL Navigate the image url and get the response header (404 ,403 error etc) print a report Since i don't need actual to download the binary file, so in performance ,compare in CURL , fopen , fsocketopen Which one is worst to use? And one more question, which method can execute in multi-thread?

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  • Socket throughput on localhost?

    - by gct
    I've got an app that's using sockets to push data, and I'm currently testing it on my localhost (so that the sender and receiver are on the same computer). I'm seeing between 36 and 66MB/s of throughput, which seems somewhat slow to me. What are normal throughput ranges for binary data on a local socket connection?

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  • json-framework error in iPhone static library

    - by David Beck
    I have an iPhone app that uses the json-framework. I moved some of the code, including the json-framework source, from the main project to a static library. When I did this, the json-framework stopped getting compiled into the binary (double checked with class dump). This causes a nasty error: *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSCFString JSONValue]: unrecognized selector sent to instance 0x43897f0' Everything else in the static library continues to function properly.

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  • Is this a situation where Qt Model/View architecture is not useful?

    - by csmithmaui
    Hi, I am writing a GUI based application where I read a string of values from serial port every few seconds and I need to display most of the values in some type graphical indicator(I was thinking of QprogressBar maybe) that displays the range and the value. Some of the other data that I am parsing from the string are the date and fault codes. Also, the data is hierarchical. I wanted to use the model/view architecture of Qt because I have been interested in MVC stuff for a while but have never quite wrapped my brain around how to implement it very well. As of now, I have subclassed QAbstractItemModel and in the model I read the serial port and wrap the items parsed from the string in a Tree data structure. I can view all of the data in a QtreeView with no issues. I have also began to subclass QAbstractItemView to build my custom view with all of the Graphical Indicators and such. This is where I am getting stuck. It seems to me that in order for me to design a view that knows how to display my custom model the view needs to know exactly how all of the data in the model is organized. Doesn't that defeat the purpose of Model/View? The QTreeView I tested the model with is basically just displaying the model as it is setup in the Tree structure but I don't want to do that because the data is not all of the same type. Is the type of data or the way you would like to present it to the user a determining factor in whether or not you should use this architecture? I always assumed it was just always better to design in an MVC style. It seems to me like it might have been better to just subclass QWidget and then read in from the serial port and update all of subwidgets(graphical indicators, labels, etc...) from the subclass. Essentially, do everything in one class. Does anybody understand this issue that can explain to me either what I am missing or why I shouldn't be doing it this way. As of now I am a little confused. Thanks so much for any help!

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  • github like workflow on private server over ssh

    - by Jesse
    I have an server (available via ssh) on the internet that my friend and I use for working on projects together. We have started using git for source control. Our setup currently is as follows: Friend created repository on server with git init named project.friend.git I cloned project.friend.git on server to project.jesse.git I then cloned project.jesse.git on server to my local machine using git clone jesse@server:/git_repos/project.jesse.git I work on my local machine and commit to the local machine. When I want to push my changes to the project.jesse.git on server I use git push origin master. My friend is working on project.friend.git. When I want to get his changes I do pull jesse@server:/git_repos/project.friend.git. Everything seems to be working fine, however, I am now getting the following error when I do git push origin master: localpc:project.jesse jesse$ git push origin master Counting objects: 100, done. Delta compression using up to 2 threads. Compressing objects: 100% (76/76), done. Writing objects: 100% (76/76), 15.98 KiB, done. Total 76 (delta 50), reused 0 (delta 0) warning: updating the current branch warning: Updating the currently checked out branch may cause confusion, warning: as the index and work tree do not reflect changes that are in HEAD. warning: As a result, you may see the changes you just pushed into it warning: reverted when you run 'git diff' over there, and you may want warning: to run 'git reset --hard' before starting to work to recover. warning: warning: You can set 'receive.denyCurrentBranch' configuration variable to warning: 'refuse' in the remote repository to forbid pushing into its warning: current branch. warning: To allow pushing into the current branch, you can set it to 'ignore'; warning: but this is not recommended unless you arranged to update its work warning: tree to match what you pushed in some other way. warning: warning: To squelch this message, you can set it to 'warn'. warning: warning: Note that the default will change in a future version of git warning: to refuse updating the current branch unless you have the warning: configuration variable set to either 'ignore' or 'warn'. To jesse@server:/git_repos/project.jesse.git c455cb7..e9ec677 master -> master Is this warning anything I need to be worried about? Like I said, everything seems to be working. My friend is able to pull my changes in from my branch. I have the clone on the server so he can access it since he does not have access to my local machine. Is there something that could be done better? Thanks!

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  • Read and write directly from and to compressed files in C

    - by victor
    Hi, in Java I think it is possible to cruise through jar files like they were not compressed. Is there some similar (and portable) thing in C/C++ ? I would like to import binary data into memory from a large (zipped or similar) file without decompressing to disk first and afterwards writing to disk in a compressed way. Maybe some trick with shell pipes and the zip utility?

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  • Berkeley DB java edition, any LGPL or BSD alternatives in Java?

    - by Ali
    Hi All, I am dealing with a huge dataset consisting of key-value pairs. The queries are always in the form of range queries on the key space (keys are numbers) hence any persistent B-Tree like structure will handle the situation. I would like to use BDB-Java Edition but the product is closed source and my company doesn't want to buy BDB-JE License. I am wondering, would you please share your experience with any non-GPL java based key-value storage system. Thanks, -A

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  • generating program structur (nodes) using bison and flex

    - by gruszczy
    I would like to write myself a pretty printer for java using bison and flex. I have written a pretty printer for a script language, but I was only writing visitors, which made the printing. How can I turn a program using my formal grammar into a tree of nodes (made using C++ classes), that afterwards I could visit using my visitor? Maybe you could give me some link with an example of this? What i need to put into flex/bison files?

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  • WPF Writing custom Control

    - by Petoj
    I wanted to write a Custom Control that would show a family tree... so i looked on FamilyShow.... So their control inherits FrameworkElement but then every thing gets super complex... are there any easy tutorials out there that show how to implement a custom FrameworkElement with children and so on? Basically what i fail to do is this, Add child controls and show them, and when drawing getting the coordinates of the child controls...

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  • "Hello World" in less than 20 bytes

    - by xelurg
    We have had an interesting competition once, where everyone would write their implementation of hello world program. One requirement was that is should be less than 20 bytes in compiled form. the winner would be the one whose version is the smallest... What would be your solution? :) Platform: 32bit, x86 OS: DOS, Win, GNU/Linux, *BSD Language: Asm, C, or anything else that compiles into binary executable (i.e. no bash scripts and stuff ;)

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  • Good Java graph algorithm library?

    - by Nick Fortescue
    Has anyone had good experiences with any Java libraries for Graph algorithms. I've tried JGraph and found it ok, and there are a lot of different ones in google. Are there any that people are actually using successfully in production code or would recommend? To clarify, I'm not looking for a library that produces graphs/charts, I'm looking for one that helps with Graph algorithms, eg minimum spanning tree, Kruskal's algorithm Nodes, Edges, etc. Ideally one with some good algorithms/data structures in a nice Java OO API.

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  • Bitwise Operations -- Arithmetic Operations..

    - by RBA
    Hi, Can you please explain the below lines, with some good examples. A left arithmetic shift by n is equivalent to multiplying by 2n (provided the value does not overflow), while a right arithmetic shift by n of a two's complement value is equivalent to dividing by 2n(2 to the power n) and rounding toward negative infinity. If the binary number is treated as ones' complement, then the same right-shift operation results in division by 2n and rounding toward zero. Thankx..

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  • Grayscale in matlab

    - by ruthenium
    I'm trying to convert a 2D array to grayscale but using mat2gray doesn't do anything and imshow() appears to create a binary image that when I graph I cannot rotate it, e.g. the original array is 2d but maps in 3d. So, what is the best way to take a grayscale of 2d array in Matlab so if you have A=rand(5,10) or something and want to take a grayscale of that, what is the best way?

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  • Efficient code to avoid circular references in c# object model

    - by Kumar
    I have an excel like grid where values can be typed referencing other rows To check for circular references when a new value is entered, i traverse the tree and create a list of values referenced thus far, if the current value is found in this list, i return an error thus avoiding a circular reference. This is infrequent enough where extreme performance is not an issue but... Question - is there a better way ? I'm told it's not the most optimal but no answer was provided so on to the experts @ SO :)

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  • How can I browse source code on an iPhone?

    - by Bill
    I have a lot of downtime on the subway each morning and evening, and I'd like to be able to review source code for various projects I'm working on. Are there any apps that can help with this? I'd like something that lets me browse a hierarchical tree of source files and that does syntax highlighting.

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  • On linux, what can cause dlopen to emit SIGFPE?

    - by kdt
    I have a library of dubious origins which is identified by file as a 32 bit executable. However, when I try to dlopen it on a 32 bit CentOS 4.4 machine, dlopen terminates with SIGFPE. Surely if there was something wrong with the format of the binary then dlopen should be handling an error? So the question is: What kinds of problems can cause dlopen to emit SIGFPE?

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  • Parsing a .NET DataSet returned from a .NET Web Service in Java

    - by Chris Dail
    I have to consume a .NET hosted web service from a Java application. Interoperability between the two is usually very good. The problem I'm running into is that the .NET application developer chose to expose data using the .NET DataSet object. There are lots of articles written as to why you should not do this and how it makes interoperability difficult: http://www.hanselman.com/blog/ReturningDataSetsFromWebServicesIsTheSpawnOfSatanAndRepresentsAllThatIsTrulyEvilInTheWorld.aspx http://www.lhotka.net/weblog/ThoughtsOnPassingDataSetObjectsViaWebServices.aspx http://aspnet.4guysfromrolla.com/articles/051805-1.aspx http://www.theserverside.net/tt/articles/showarticle.tss?id=Top5WSMistakes My problem is that despite this not being recommended practice, I am stuck with having to consume a web service returning a DataSet with Java. When you generate a proxy for something like this with anything other than .NET you basically end up with an object that looks like this: @XmlElement(namespace = "http://www.w3.org/2001/XMLSchema", required = true) protected Schema schema; @XmlAnyElement(lax = true) protected Object any; This first field is the actual schema that should describe the DataSet. When I process this using JAX-WS and JAXB in Java, it bring all of XS-Schema in as Java objects to be represented here. Walking the object tree of JAXB is possible but not pretty. The any field represents the raw XML for the DataSet that is in the schema specified by the schema. The structure of the dataset is pretty consistent but the data types do change. I need access to the type information and the schema does vary from call to call. I've though of a few options but none seem like 'good' options. Trying to generate Java objects from the schema using JAXB at runtime seems to be a bad idea. This would be way too slow since it would need to happen everytime. Brute force walk the schema tree using the JAXB objects that JAX-WS brought in. Maybe instead of using JAXB to parse the schema it would be easier to deal with it as XML and use XPath to try and find the type information I need. Are there other options I have not considered? Is there a Java library to parse DataSet objects easily? What have other people done who may have similar situations?

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  • Java object to XML Elements?

    - by DaveKub
    I'm working on a webservices client app and I have it mostly working. I can retrieve and read data from the third-party webservice fine. Now I need to submit some data and I'm stuck. The classes for the objects I'm retrieving/submitting were generated from XSD files via the xjc tool. The part I'm stuck on is turning one of those objects into an XML tree to submit to the webservice. When I retrieve/send a request from/to the ws, it contains a 'payload' object. This is defined in java code as (partial listing): @XmlAccessorType(XmlAccessType.FIELD) @XmlType(name = "PayloadType", propOrder = { "compressed", "document", "any", "format" }) public class PayloadType { @XmlElement(name = "Compressed") protected String compressed; @XmlElement(name = "Document") protected List<String> document; @XmlAnyElement protected List<Element> any; protected String format; public List<Element> getAny() { if (any == null) { any = new ArrayList<Element>(); } return this.any; } } The only field I'm concerned with is the 'any' field which contains an XML tree. When I retrieve data from the ws, I read that field with something like this: ('root' is of org.w3c.dom.Element type and is the result of calling 'getAny().get(0)' on the payload object) NodeList nl = root.getElementsByTagName("ns1:Process"); // "ns1:Process" is an XML node to do something with if (nl != null && nl.getLength() > 0) { for (int i = 0; i < nl.getLength(); i++) { Element proc = (Element) nl.item(i); try { // do something with the 'proc' Element here... } catch (Exception ex) { // handle problems here... } } } Submitting data is where I'm stuck. How do I take a java object created from one of the classes generated from XSD and turn it into an Element object that I can add to the 'any' List of the payload object?? For instance, if I have a DailyData class and I create and populate it with data: DailyData dData = new DailyData(); dData.setID = 34; dData.setValues = "3,5,76,23"; How do I add that 'dData' object to the 'any' List of the payload object? It has to be an Element. Do I do something with a JAXBContext marshaller? I've used that to dump the 'dData' object to the screen to check the XML structure. I'm sure the answer is staring me in the face but I just can't see it! Dave

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