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• Practical examples of using symbols in Scala?

  - by Jesper

  Scala has symbols - names that start with a single quote ' and which are a kind of string constants. I know symbols from Ruby (where they start with a colon). In Ruby they are used for some meta-programming tasks, like generating getters and setters for member variables (for example attr_reader :name to generate a getter for name). I haven't seen a lot of use of symbols in Scala code yet. What are practical uses for symbols in Scala?

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• Is it bad to have multiple return statements?

  - by scot

  Hi, I have a code somethg like below: int method(string a ,int b , int c){ if(cond1) return -1; if(cond2 || cond3) return 3; if(cond1 && cond2) return 0; else return -999; } Does it perform badly when compared to having multiple if else and have single return?

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• How to organize makefiles / solutions etc. in multiplatform projects?

  - by Michal Czardybon

  I have a project which can be compiled with Visual Studio, GCC and with some embedded compilers. Sources are shared, but each platform requires separate makefiles, project files, solutions etc. There are two ways I can organize them: Intermixed in a single hierarchy of folders With separate folders for platform-dependent files The first solution creates some confusion about which file belongs to which platform, but the second causes some repetition of the folders structure (some compilers require each project to have a separate folder). Which do you think is better?

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• Crate datasource for mysql to different machine in glassfish

  - by Dickson

  I'm using glassfish(v2.11) as my application server and I have another machine for mysql database server. Currently I want to separate the app server and db server, so I create a jdbc datasource to point to mysql server, but it doesn't works as expect, by the way, when I create datasource to point to local machine (glassfish app server and mysql db server in single machine), and It works well. Is there any configuration I need to care of when pointing datasource to different machine which I use to host my database (MySQL 5.1)?

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• Is there a sample Rails application with a number of cucumber stories?

  - by Otto

  I'm trying to really understand Cucumber stories. I get it, but I'm really slow writing them. I think if I saw a good fleshed out application, I'd get closer to where I want to be. There are some samples out there, but there aren't any I can find with a single app with some non-contrived example stories. Are there any existing ones?

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• What does 'Failed shutdown of Apache Portable Runtime' log message mean?

  - by Ehrann Mehdan

  After shutting down tomcat, I get this message: INFO: Failed shutdown of Apache Portable Runtime Then Tomcat shuts down after all I haven't found a reasonable explanation googling around, nor in the single duplicate I've found (0 answers)

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• How to add a jar build by a project to the project in eclipse?

  - by Xetius

  I have a project which as part of the build process creates an XMLBeans jar file (stbSchemas.jar) which I want to include and reference in this project. Is this the best way to go about this (Single project) or should I have a child project which is built from the parent project? I am building this using Maven2 inside Eclipse. Is there a better way to do this so that I can maintain the integrity of the projects and stability of the builds.

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• Launch another instance of Java app on Mac

  - by TomA

  I have a Mac Java app bundle that has problems opening an OpenGL window from a SWT dialog in a single process. It just doesn't work. To solve this problem I would like to open a SWT dialog in one instance of the Java app and then have it launch another instance of itself with a parameter saying "this time open the OpenGL window". The part I don't know how to do is finding out what "itself" is on a Mac. How can I do that?

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• Postgresql Altering Table

  - by Jahn

  Is it possible to alter a table to add a new column and make that column a foreign key to another table in a single command in Postgresql? "alter table x add column y id references z(id)" doesn't seem to work as I had hoped.

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• MYSQL DELETE from a table [closed]

  - by Hossein

  Possible Duplicate: MySQL DELETE in a single table Hi, I have this table: userurltag(id,user,Url,tag) I want to remove rows that contain urls that are used by only one user, can someone help me? It seems that DELETE...(SELECT...) is not supported in Mysql.

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• syscall from within GCC inline assembly

  - by guest

  is it possible to write a single character using a syscall from within an inline assembly block? if so, how? it should look "something" like this: __asm__ __volatile__ ( " movl $1, %%edx \n\t" " movl $80, %%ecx \n\t" " movl $0, %%ebx \n\t" " movl $4, %%eax \n\t" " int $0x80 \n\t" ::: "%eax", "%ebx", "%ecx", "%edx" ); $80 is 'P' in ascii, but that returns nothing. any suggestions much appreciated!

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• Different right and left axes in a MATLAB plot?

  - by AndyL

  I plot a single trace in MATLAB with plot(). I'd like to add a right-y axis with a different set of tick marks (scaled linearly). Is this possible?

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• Where do filesystems like Reiser, NFS, etc store the file tables?

  - by Mike Curry

  Where do filesystems like Reiser, NFS, etc store the file tables? We're looking at writing our own filesystem, and wondering if we should use a single file to hold it all using btree's or use something out there. Any advice? This is more a learning exercise than anything.

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• How to use elmah multiple error log process

  - by shamim

  In my application i want to save error log on DB Server and xml files by using the elmah .I can use them in single.How to use it for multiple process.

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• DOS command to open multiple pages in Internet Explorer 7

  - by Greg

  How do I open multiple pages in Internet Explorer 7 with a single DOS command? Is a batch file the only way to do this? Thanks!

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• Berkeley DB replication: upper limit on number of replicants?

  - by Mark Harrison

  I'm considering using Berkeley DB to cache some data on an application cluster. What's a reasonable upper limit on the number of nodes I can plan on Berkeley DB handling? Writing to the database will be from a single node.

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• C & PHP: Storing settings in an integer using bitwise operators?

  - by Andrew M

  I'm not familiar with bitwise operators, but I have seem them used to store simple settings before. I need to pass several on/off options to a function, and I'd like to use a single integer for this. How can I go about setting and reading these options?

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• Podcasts for Clojurians?

  - by Michiel Borkent

  I regularly listen to the podcasts DotNetRocks and Software Engineering Radio. Lately I have become more interested in Clojure. Are there any podcasts that target more toward the Clojure (more general FP/LISP/dynamic languages) audience? I know of some single podcast episodes but I'm looking for a podcast I can regularly listen to.

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• How to tar multiple files in perl

  - by kpraveenreddy

  How can I tar multiple directories and also append files with some pattern like '.txt' and exclude some directories and exclude some patterns like '.exe' all into a single tar file. The main point is the number of directories are unknown(dynamic), so I need to loop through..I guess?

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• Are Multi-column Primary Keys in MySQL a optimisation problem?

  - by David

  Been looking into using multi-column primary keys and as performance is extremely important with the size of traffic and database I need to know if there is anything to consider before I start throwing out the unique ID method on many of my tables and start using mulit column primary keys. So, what are the performance/optimisation pros/cons to using multi column primary keys versus a basic single column, auto-inc primary key?

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• drop down box php

  - by DAFFODIL

  I have stored 6 records in mysql db,when i use this code each of the 6 records getting displayed in seprate drop down box,i want them to be displayed in a single drop down box.Where am i going wrong? Any help ii be appreciated. Thnx in advance. http://dpaste.com/hold/180077/

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• Problem with \' in URLencoding

  - by Bruce

  I am working on Java. Here is my code response = URLEncoder.encode(response, "UTF-8").replaceAll("\\+", "%20"); Problem comes when there is a ' (single quote) in the string response. It gets encoded to \'. eg - 'Collective Dynamics of Complex Networks' comes as \'Collective Dynamics of Complex Networks\' I want it to remain as it is. What should I do?

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• SQL Server: How to iterate over function arguments

  - by atricapilla

  I'm trying to learn SQL and for demonstration purposes I would like to create a loop which iterates over function arguments. E.g. I would like to iterate over SERVERPROPERTY function arguments (propertynames). I can do single select like this: SELECT SERVERPROPERTY('ProductVersion') AS ProductVersion, SERVERPROPERTY('ProductLevel') AS ProductLevel, SERVERPROPERTY('Edition') AS Edition, SERVERPROPERTY('EngineEdition') AS EngineEdition; GO but how to iterate over all these propertynames? Thanks in advance.

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• IIS: How can I redirect requests for one page to another?

  - by James Evans

  I have written an app to replace a single page and need to redirect the requests for the old page to the new app. In IIS, how would I redirect the request for http://www.mysite.com/foo.aspx to http://www.mysite.com/bar/default.aspx Thanks!

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• How can I integrate Java with .Net?

  - by Luke

  I have one SDK that is available in Java and another SDK that is available for .Net and would like to write a single application that interfaces with both of them. I imagine I will need to use a cross platform communication framework that can support named pipes (or other in memory communication), what is the best choice? After some more research I found Hessian -- does anyone know anything about the maturity of this project?

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