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  • replace new lines with comas in shell

    - by mpapis
    I want to replace new lines in text with coma or space but do not change the last new line. I know of this question: How to replace new lines with tab characters - but it does produce an tab on end instead of new line. So far I have come with: awk 'NR>1{printf","} {printf $1} END{printf"\n"}' Is there an easier way to do this? This is not an assignment, I am just curious want to level up my scripting.

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  • Programming Interview Preparation Book

    - by kunjaan
    Which programming book prepared you the most of interview questions? My friend recommended these: Interview Questions Exposed Career Cup's Book What does this community recommend for someone preparing for an entry level software development/ internship interview questions?

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  • acts_as_tree and to_json or from_json

    - by Sohan
    Hello: Does anyone have a solution to convert an acts_as_tree model to json that includes all its nodes? I trued using :include=:children, but that only goes down to one single level. Any idea how to iterate the whole tree?

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  • At What point should you understand pointers?

    - by Vaccano
    I asked a question like this in an interview for a entry level programmer: var instance1 = new myObject{Value = "hello"} var instance2 = instance1; instance1.Value = "bye"; Console.WriteLine(instance1.Value); Console.WriteLine(instance2.Value); The applicant responded with "hello", "bye" as the output. Some of my co-workers said that pointers are not that important anymore or that this question is not a real judge of ability. Are they right?

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  • C++ standard: dereferencing NULL pointer to get a reference?

    - by shoosh
    I'm wondering about what the C++ standard says about code like this: int* ptr = NULL; int& ref = *ptr; int* ptr2 = &ref; In practice the result is that ptr2 is NULL but I'm wondering, is this just an implementation detail or is this well defined in the standard? Under different circumstances a dereferencing of a NULL pointer should result in a crash but here I'm dereferencing it to get a reference which is implemented by the compiler as a pointer so there's really no actual dereferencing of NULL.

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  • Regex help with Google Page Monitor extension

    - by bibliwho
    I'm trying to monitor a small section of a web page for changes using the the Google Page Monitor extension -- https://chrome.google.com/extensions/detail/pemhgklkefakciniebenbfclihhmmfcd Under advanced settings I can use either Regex or Selectors to accomplish this, but need help with this. In the following html, I'd like to monitor the following for changes in either the URL in line 4 or the text in line 5. Any pointers gratefully accepted. <div id="rtBtmBox"><div id="sectHead" style="margin-bottom:5px;"> <h3>SLJ's Pick of the Day</h3></div> <p align="center">From the&nbsp;March issue</p> <p align="center"><a target="_blank" href="http://www.schoollibraryjournal.com/article/CA6723937.html"> <font color="#0000ff"><strong><em>The Summer I Turned Pretty</em></strong><br/>

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  • Why are my Lucene Document results empty?

    - by vegashacker
    I'm running a simple test--trying to index something and then search for it. I index a simple document, but then when a search for a string in it, I get back what looks to be an empty document (it has no fields). Lucene seems to be doing something, because if I search for a word that's not in the document, it returns 0 results. Any reason why Lucene would reliably return a document when it finds one that matches the given query, and yet that document has nothing in it? Thanks! PS: I'm actually running Lucandra (Lucene + Cassandra). That certainly may be a relevant detail, but not sure.

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  • How to generate a script for changing a column of varchar to xml type with data being converted?

    - by user1323981
    Initially I have a column (partner_email) of varchar.Now a recent change has come where it needs to be changed to be changed to the XML type but the previous records needs to be reserve into the new column. I have applied the below algorithm to accomplish the work /*********************************************************************** Purpose: To change the partner_email column from Varchar Type To Xml Type and convert the existing records from varchar to xml types. Programmers Notes: 1. Create a new Column by the name partner_email_temp of type XML into the Partner Table 2. Copy the Email contents from partner_email to partner_email_temp column after proper conversion N.B.~ The format will be <PartnerEmails> <Email>[email protected]</Email> <Email /> <Email /> </PartnerEmails> 3. Drop the exisitng partner_email 4. Rename partner_email_temp column to partner_email ***********************************************************************/ USE [Test] GO --===== Create a partner_email_temp column of type xml into the Partner table IF NOT EXISTS ( SELECT * FROM INFORMATION_SCHEMA.columns WHERE table_name = 'Partner' AND column_name = 'partner_email_temp' ) BEGIN ALTER TABLE [dbo].[Partner] ADD partner_email_temp XML NULL END GO --===== Copy the Email contents from partner_email to partner_email_temp column -- after proper conversion to xml type UPDATE [dbo].[Partner] SET partner_email_temp = CAST('<PartnerEmails><Email>' + REPLACE(partner_email, '&', '&amp;') + '</Email><Email></Email><Email></Email></PartnerEmails>' AS XML) GO --===== Drop the exisitng partner_email ALTER TABLE [dbo].[Partner] DROP COLUMN partner_email GO --===== Rename partner_email_temp column to partner_email Exec sp_RENAME 'Partner.partner_email_temp','partner_email','COLUMN' GO I works fine for the first time I ran. Now if I ran it for the next time, it am getting an error Msg 8116, Level 16, State 1, Line 4 Argument data type xml is invalid for argument 1 of replace function. Caution: Changing any part of an object name could break scripts and stored procedures. The intention is that, if the partner_email column is varchar, the script will change it to xml type and will convert all the data in xml format . If I ran it second time, it should ignore the statement. How to achieve this? I am trying in a different way DECLARE @columnDataType VARCHAR(50) SELECT @columnDataType = DATA_TYPE FROM INFORMATION_SCHEMA.columns WHERE table_name = 'Partner' AND column_name = 'partner_email' print @columnDataType IF (@columnDataType = 'varchar') BEGIN --===== Create a partner_email_temp column of type xml into the Partner table IF NOT EXISTS ( SELECT * FROM INFORMATION_SCHEMA.columns WHERE table_name = 'Partner' AND column_name = 'partner_email_temp' ) BEGIN ALTER TABLE [dbo].[Partner] ADD partner_email_temp XML NULL --===== Copy the Email contents from partner_email to partner_email_temp column -- after proper conversion to xml type UPDATE [dbo].[Partner] SET partner_email_temp = CAST('<PartnerEmails><Email>' + REPLACE(partner_email, '&', '&amp;') + '</Email><Email></Email><Email></Email></PartnerEmails>' AS XML) --===== Drop the exisitng partner_email ALTER TABLE [dbo].[Partner] DROP COLUMN partner_email --===== Rename partner_email_temp column to partner_email EXEC sp_RENAME 'Partner.partner_email_temp','partner_email','COLUMN' END END but getting error Msg 207, Level 16, State 1, Line 29 Invalid column name 'partner_email_temp'. Help needed

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  • replicating master tables mapping in transaction tables

    - by NoDisplay
    I have three master tables for location information Country {ID, Name} State {ID, Name, CountryID} City {ID, Name, StateID} Now I have one transcation table called Person which hold the person name and his location information. My Question is shall I have only CityID in the Person table like this: Person {ID, Name, CityID}' And have view of join query which give me detail like "Person{ID,Name,City,State,Country}" or Shall I replicate the mapping Person {ID, Name, CityID, StateID, CountryID} Please suggest which do you feel is to be selected and why? if there is any other option available, please suggest. Thanks in advance.

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  • What type of programs are C/C++ used for now?

    - by Ryan Detzel
    I started off with C in school, went to Java and now I primarily use the P's(Php, Perl, Python) so my exposure to the lower level languages have all but disappeared. I would like to get back into it but I can never justify using C over Perl or Python. What real-world apps are being built with these languages? Any suggestions if I want to dive back in, what can I do with C/C++ that I can't easily do with Perl/Python?

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  • matlab noise cleaning

    - by gil
    how can i clean image from noise? i have a program that create images, and i have noises in the images, like a shadow of the object that in the image. how can i clean it? i tried to use a level, but i didn't work.

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  • Using two threads and controlling one from the other in java?

    - by sidra
    Can someone please help me out. I need to use two threads in a way that one thread will run permanently while(true) and will keep track of a positioning pointer (some random value coming in form a method). This thread has a logic, if the value equals something, it should start the new thread. And if the value does not equal it should stop the other thread. Can someone give me some code snippet (block level) about how to realize this?

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  • SQL Syntax for testing objects before creating views & functions

    - by Scott Weinstein
    I'm trying to figure out the syntax for creating a view (or function) but only if a dependent CLR assembly exits. I've tried both IF EXISTS (SELECT name FROM sys.assemblies WHERE name = 'MyCLRAssembly') begin create view dbo.MyView as select GETDATE() as C1 end and IF EXISTS (SELECT name FROM sys.assemblies WHERE name = 'MyCLRAssembly') create view dbo.MyView as select GETDATE() as C1 go Neither work. I get Msg 156, Level 15, State 1, Line 2 Incorrect syntax near the keyword 'view'. How can this be done?

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  • Book on C++ for understading of advance concepts

    - by Invincible
    What is good book for industry level C++ programming? I am not looking for C++ book for beginners which talk about data types and control structure. I am looking for more advance book. For example, how to build system application using C++. Any kind of guidance will be very helpful. Thank in advance.

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  • Logging a user session for playback

    - by justSteve
    Running an MVC2 site against IIS7 and would like to capture more detail of how users traverse the site - ideally to the point of being able to replay even the duration between mouse clicks - feedback of where people pause and/or backtrack. I could do this with flash but that's no longer an option. Now it's just IIS7 via asp.net f4. That should be enough IIS7 is supposed to be extensible enough that there'd be any number of 3rd party options for this sort of niche need. I'm willing to consider client-side .net components but this sure seems to be the responsibility of the server. [opps...does this belong on serverfault?] thx

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  • Display data from table in Ms.access into text box C#

    - by Sophorn
    I have a problem to ask you. I have a table in Ms.Access that contain: (FoodID, FoodName, Price) and in C# I have three text boxes (txtId, txtName, txtPrice) and a button (btnSearch). My question is that, In C# I just type FoodID in (txtId) and then click on button Search It'll display FoodName and Price ( from table access) in txtName and txtPrice by itself. What is the source code for this point? Please write the source code detail.(Please send it to my e-mail: [email protected]) I am looking forward to getting answer from you. Thanks you.

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  • How Would you Mimic an Arbitrary Directory Structure with Rails Routes?

    - by viatropos
    I want to be able to map Google Docs' folder system to urls in my application and am just wondering how I can say "route, I want you to match an arbitrary set of nodes, and the last one is the file (or possibly a directory, I can check in the controller)". So I could do things like: www.mysite.com/documents/folder1/childfolderA/document www.mysite.com/documents/root-level-doc Can the routes.rb file do something like this?

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  • beforeSave() returned some error

    - by kwokwai
    Hi all, I got a simple input text field in a HTML form: <input type="text" name="data[User][pswd]" id="data[User][pswd]"> The scripts for the Controller's action that captured the data is as follows: function register(){ $temp = $this->data; if(strlen($temp['User']['pswd'])>6) { if ($this->User->save($this->data)) { $this->Session->setFlash('Data was Saved'); } } } // this script works And in the Model controller, I got these lines of codes: function beforeSave() { $raw = $this->data; if(strlen($raw['User']['pswd'])>6){ md5($raw['User']['pswd']); } return true; } // this script failed to work The data was stored into the Database successfully but it was not undergone any MD5 encryption. I think that there must be some errors in the Model's script because I saw some errors flashed after the data was saved, but the screen that showed the errors immediately refreshed in a second after the data was saved successfully and I couldn't see the detail of the errors that caused the problem. Could you help me out please?

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  • How to deploy an application with firewall permissions on Mac?

    - by user264878
    I've bundled a jar file as a mac application using jar bundler. I'm now trying to create an installer for this app so that: 1) The application will be placed in the applications folder 2) The application is added to the list of permissible apps in Mac Application Level Firewall Also, I have several example files I would like to include with this application - what is the best way to make these available to the user. Someone suggested I have the mpkg file launch a dmg file which would contain these files, but this seems circuitous. Thanks

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