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• How to get the line non-empty of a file using tail ? Bash

  - by debugger

  Do you have an idea how to get the last line non-empty using tail in bash ? For example my_file.txt will be as following: hello hola bonjour (empty line) (empty line) Obviously if i do tail -n 1 my_file.txt i will get an empty line. In my case i want to get bonjour Any clues? Thanks Debugger

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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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• Using a user-defined type as a primary key

  - by Chris Kaminski

  Suppose I have a system where I have metadata such as: table: ====== key name address ... Then suppose I have a user-defined type described as so: datasource datasource-key A) are there systems where it's possible to have keys based on user-defined types? B) if so, how do you decompose the keys into a form suitable for querying? C) is this a case where I'm just better off with a composite primary key?

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• Reports Generation for Web Based Application Using Selenium Tool

  - by Rahul Mendiratta

  Currently we are generating HTML Reports for Automation, but those reports are not good enough to explain number of scenario which we cover in Automation, Is there anything we can use with Selenium to generate a proper reports which can give a complete overview and can easily understand by anyone First Thing we can show a complete pie charts which cover number of test case passed and Failed. Second thing we can show, what are test cases are there in this build.

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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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• 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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• Do btrees and b+trees only store data at the leafs?

  - by rohit

  Do b trees and b+ trees only store data at their leafs? I am assuming that they use their internal nodes to search the required data. Is that the case or do they store data in every node?

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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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• 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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• 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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• 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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• 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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• 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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• MS Exam 70-536 - How can you constrain the input before you write any code?

  - by Max Gontar

  Hello! In MS Exam 70-536 .Net Foundation, Chapter 3 "Searching, Modifying, and Encoding Text" in Case Scenario 1 related to regex there is a question: How can you constrain the input before you write any code? I thought it's maybe a in-mind design of regex pattern but it will not really constrain the input, will it? I am not so good in psychokinesis yet! Or maybe the is some other way? Thanks for your time!

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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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• Bind to Count of items in the DataContext

  - by Organ Grinding Monkey

  I want to bind to the Count/amount of items within my DataContext. I have an object, lets say person which has a List<address> as a property. I would like to display the amount of addresses for that person ie: 5 or 6 or whatever the case may be. I've tried {Binding Path=address#.Count} and a few others but that doesnt seem to work. Any help would be appreciated, thanks.

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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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• 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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• 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 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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• 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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• Where did the debug commands go in Visual Studio 2008?

  - by Charles

  You're going to think I'm either lying or nuts, but neither is the case. I installed VS2008 PRO on a Windows 7 x64 machine and all the debugging commands are missing. There's no debug toolbar and no Debug.* commands under Tools\Options\keyboard. How do I get the debug functionality working?

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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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• 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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• 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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