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• Hold a network connection although IP address change

  - by rursw1

  Hi, Is it possible to hold an open TCP connection with a client, while the IP address of the client is externally changed? For example, the connection is establishes against address X, but somewhen while the connection is open, the client-side user asks for IP renew and gets another IP address. Can the connection remains alive in this case? Thanks in advance.

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• #Define Compiler Directive in C#

  - by pm_2

  In C, I could declare a compiler directive as follows: #define MY_NUMBER 10 However, in C#, I only appear to be able to do this: #define MY_NUMBER Which is obviously useless in this case. Is this correct, or am I doing something wrong? If not, can anyone suggest a way of doing this, either at namespace or solution level? I thought of maybe creating a static class, but that seems to be overkill for one value.

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• Howto check if two hosts are the same

  - by Michael Stoll

  Hi, I just came across an issue, where I had to check if a path points into a windows share. Part of this problem is to check if host A is the same as host B. Where host A and host B can be one of the following {IPv4-Address, IPv6-Address, Hostname, FQDN}. As I do not need to be exact it's enough to resolve and compare the IP-Addresses in my case. But is there, theoretically, a method to check if the hosts are the same?

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• QuickGraph - How can I associate an Edge with a Class? (i.e. like you can with a Vertex)

  - by Greg

  Hi, Q1 - How can I associate an Edge with a Class? (i.e. like you can with a Vertex) In my case there are various types of edges I want to be able to model. So my real question I guess is how can I associate some level of data with Edges (e.g. edge type). The graph I was looking at using was: http://quickgraph.codeplex.com/wikipage?title=BidirectionalGraph&referringTitle=Documentation thanks

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• Zend Framework, what $this->_forward is doing

  - by RageZ

  Hello everyone, I would like someone to explain me what _forward is exactly doing, I cannot see if _forward is also rendering the attached view to the action or just executing the action. Also is it possible to pass argument to $this-action in a view script ? More generally my problem is how to code a confirmation page, let's say the user input some stuff and you want to show him confirmation, is forward is mean for that case ? Thanks

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• How to get default value of Multiline text box through JQuery?

  - by user144842

  Hi Case is I want to prompt a message (Do you want to save changes?) if text box default value is updated on .aspx page before submitting the page. I am using .text() to compare with .val(). It works fine in firefox but failing in IE7 and IE8 if ($("#<%=txt1.ClientID%>").attr("value") === $("#<%=txt1.ClientID%>").text()) return(true); return confirm('Do you wish to save these changes?');

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• How to vertically center content with variable height within a div?

  - by jessegavin

  What is the best way to vertically center the content of a div when the height of the content is variable. In my particular case, the height of the container div is fixed, but it would be great if there were a solution that would work in cases where the container has a variable height as well. Also, I would love a solution with no, or very little use of CSS hacks and/or non-semantic markup.

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• Will the memory rise if I loads a same URL for 1000 times in Adobe AIR?

  - by Yinan

  Hi, Here is the case: I have created a test application which simply loops to load a same url for 1000 times by using HTMLLoader class from Adobe AIR. What I found is that the memory of this app keeps rising. So is this expected? I mean it's the same URL although it get loaded for 1000 times. Does the AVM create 1000 objects behind the scene?

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• initialize a const array in a class initializer in C++

  - by Nathan Fellman

  I have the following class in C++: class a { const int b[2]; // other stuff follows // and here's the constructor a(void); } The question is, how do I initialize b in the initialization list, given that I can't initialize it inside the body of the function of the constructor, because b is const? This doesn't work: a::a(void) : b([2,3]) { // other initialization stuff } Edit: The case in point is when I can have different values for b for different instances, but the values are known to be constant for the lifetime of the instance.

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• install avisynth under linux via ssh

  - by Issak

  i have a linux server (ubuntu os) to which i have access via ssh and wish to install avisynth on it. i know windows apps can be installed with the help of wine, but the problem is how i manage to install the app (avisynth) thru ssh, that is, without graphical intarface? can wine be somehow configured to manage such a case? what should i do to install avisynth via ssh? (am not insterested in other apps)

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• regex, check if a line is blank or not

  - by Adnan

  I am trying to make simple regex that will check if a line is blank or not. Case; " some" // not blank " " //blank "" // blank

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• Java: How to return single char after string

  - by newSpringer

  I have a file directory which could look like either C:\projects\lab3\test\test.java or C:\projects\assignment3\test\test.java But the "lab3" or "assignment3" can appear anywhere in the directory, it is not a set directory What i want is to check to see if the directory either contains "lab" or "assignment" and get the number that follows. In this case "3" This is what i have so far if(directory.toLowerCase().contains("lab")){ } else if (directory.toLowerCase().contains("assignment")){ } but i do not know how to check for the char straight after the word?

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• Opera doesn't recognize 0.0.0.0 as localhost. Is this behaviour standard-conform?

  - by java.is.for.desktop

  Hello, everyone! Opera (version 10.10) under Linux (don't know about other OSes) does not recognize http://0.0.0.0/ as local address (http://127.0.0.1/) , while Firefox does. What is the difference between these addresses? Which ob the two browsers in this case is standard conform?

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• Specify a OneWay Binding in HandleBars - Ember

  - by Miguel Madero

  Is there a way to Specify a OneWay Binding in HandleBars? bind-attr always calls Ember.bind, which always create a two way binding. This seems to be the case for elements that don't even change: <img {{bind-attr class=":class-name-to-always-apply"}}> But even in cases where the element could change, we might have reasons to update it manually (e.g. performance or we don't want to change it on textChanged, but do it manually)

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• jquery ui datepicker if no active mondays left at the end of the month

  - by Alex

  I made that only mondays are active in each month like this function onlyMondays(date){ var day = date.getDay(); return [(day == 1), '']; } But at last week of the month there wont be any active mondays left so i want to show next month in that case based on the code above. Any idea would be appreaciated. Thanks.

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• How to handle null response for json object

  - by user1494754

  I get a JSON response as { "edges": [], "nodes": [] } how to check if the objects has null values and handle the case?? JSONObject jobj = new JSONObject(line); JSONArray jArray = jobj.getJSONArray("edges"); if(jArray.length()!=0) { for(int i=0;i<jArray.length();i++){ JSONObject json_data = jArray.getJSONObject(i); x.add((float) json_data.getInt("x")); y.add((float) json_data.getInt("y")); end This retrurns me : org.json.JSONException: end of input at character 0 of

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• Sharing serial port (Modem protocol + dialer)

  - by debita

  Hi, I wanted to use this code to send archives with Xmodem: http://www.java2s.com/Code/Java/Network-Protocol/JModemsimplecommunicationsprogram.htm In this case, I want to establish a dialup connection between two computers and send a binary file. But this code doesn't let me set a phone number to dial after i setup the port and before I transfer the file. Is there any way of sharing the port with another application that dials the phone number?

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• What are real world examples of when Linked Lists should be used?

  - by oo

  Another programmer was mentioning that they haven't found a use case for using a linked list data structure in any professional software in his career. I couldn't think of any good examples off the top of my head. He is mostly a C# and Java developer Can anyone give some examples where this was the correct data structure to solve a particular real world problem? Related: What is a practical, real world example of the Linked List?

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• How to avoid error messagebox if .net is not installed on client system.

  - by Power-Mosfet

  Hi, I have a C# application which request .net 2 on client system. I like to replace the error message box in case if .net2 is not detected with ruuning an executable program which I have a written how do not request .net2.

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• How to change text on a back button

  - by Ilya

  Hi, By default the back button uses as a text on it a title of a viewcontroller. Can I change text on the back button without changing a title of a view controller? I need this because I have a view controller which title is too long to display and in this case I would like to display just "Back" as a caption for back button. I tried the following which didn't work: self.navigationItem.leftBarButtonItem.title = @"Back"; Thanks.

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• Pushing changes to a remote server from a locally started repo

  - by Eliseo Soto

  I started a new project and created a local git repo with "git init" and now I have a few branches and everything works great. However, since my webhosting company offers git hosting (details if you're curious), I'd like to push my entire repo to their servers to have a backup in the cloud in case something bad happens to my local repo. How can I make the remote repo the "origin" since the repo was started locally?

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• Get ahold of session in command object in Grails

  - by UltraVi01

  How can I get the session from within a command object? I have tried: import org.springframework.security.context.SecurityContextHolder as SCH class MyCommand { def session = RCH.currentRequestAttributes().getSession() } This throws java.lang.IllegalStateException: No thread-bound request found: Are you referring to request attributes outside of an actual web request, or processing a request outside of the originally receiving thread? If you are actually operating within a web request and still receive this message, your code is probably running outside of DispatcherServlet/DispatcherPortlet: In this case, use RequestContextListener or RequestContextFilter to expose the current request.

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• extract transform load

  - by mitch

  Wikipedia defines a 'typical' ETL cycle as : Cycle initiation Build reference data Extract (from sources) Validate Transform (clean, apply business rules, check for data integrity, create aggregates or disaggregates) Stage (load into staging tables, if used) Audit reports (for example, on compliance with business rules. Also, in case of failure, helps to diagnose/repair) Publish (to target tables) Archive Clean up ..What is meant by 'Build reference data'?

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• Dynamic ORDER BY in SQL Server

  - by BrunoLM

  I saw some topics about this, but the problem is that the solutions required a "switch case"... Like this I have a table with a lot of columns, is there a way to do a dynamic sort without the switch?

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• Using many mutex locks

  - by hanno

  I have a large tree structure on which several threads are working at the same time. Ideally, I would like to have an individual mutex lock for each cell. I looked at the definition of pthread_mutex_t in bits/pthreadtypes.h and it is fairly short, so the memory usage should not be an issue in my case. However, is there any performance penalty when using many (let's say a few thousand) different pthread_mutex_ts for only 8 threads?

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