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  • How do I combine all lines in a text file into a single line?

    - by John
    I want to get all lines in a text into one line. I'm a beginner at coding trying to learn by doing. I've spent four hours trying to solve this problem. I know there's a simple solution to this problem. Here's what I've been trying. sed -e 'N;s/\n//' myfile.txt #Does nothing sed -e :a -e N -e 's/\n/ /' -e ta myfile.txt #output all messed up and I can't make head nor tail of the syntax cat myfile.txt | tr -d '\n' myfile.txt # Deletes all lines Here's the text file: 500212 262578-4-4 23200 GRIFFITH LABORATORIES LTD GRIFFITH LABORATORIES SOUTH DUBLIN COUNTY COUNCIL OFFICE OFFICE (INDUSTRIAL) List Rateable 2 Pineview Industrial Estate Firhouse Road Knocklyon 31 Dec 2007 01 Jan 2008" I can't figure out where I've gone wrong....

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  • Java dev learning Python: what concepts do I need to wrap my head around?

    - by LRE
    I've run through a few tutorials and written some small projects. I'm right in the middle of a small project now infact. All is going well enough thanks in no small part to Uncle Google (who usually points me to Stackoverflow ;-) Several times in the last few days I've found myself wondering "what am I missing?" - I feel that I'm still thinking in Java as I write in Python. This question over at StackOverflow is full of tips about what resources to read up on for learning Python, but I still feel that I'm a Java dev with a dictionary (pun unintended) to translate into Python. What I really want to do is refactor my head to be able to write Pythonic Python instead of Java disguised as Python (not that I want to loose my Java skills). So, the crux of my question is: what concepts does a Java dev really need to learn to think Pythonic? This includes anything that needs to be un-learnt. ps: I consider language syntax to not be particularly relevant to this question.

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  • When to reply 400 Bad Request

    - by KajMagnus
    According to www.w3.org, a Web server should reply with status code 400 Bad Request if: "The request could not be understood by the server due to malformed syntax. The client SHOULD NOT repeat the request without modifications" Does that mean only request that violates some HTTP spec? Or does it include a request that my particular Web app thinks is broken? When would you reply 400? For example, if my Web app expects a query string to always include a "function=..." parameter, would you reply code 400 Bad Request or 403 Forbidden? (403 means that "The server understood the request, but is refusing to fulfill it.")

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  • GDD-BR 2010 [1C] Google Web Tookit: What it is, How it Works and Deeper Dives

    GDD-BR 2010 [1C] Google Web Tookit: What it is, How it Works and Deeper Dives Speaker: Chris Ramsdale Track: Cloud Computing Time slot: C [12:05 - 12:50] Room: 1 Level: 151 If you're like the rest of us, at some point in your web app development you've wondered if there was an easier solution. One that includes built-in debuggers, code refactoring, reliable syntax highlighting, etc. After all, why should the server-side and desktop programmers get all of the good tools? The good news is that with Google Web Toolkit (GWT) you do have access to these tools. And in this session, Chris Ramsdale will get you up and running with GWT, including what it is, how it works, and deeper dives into generators, native Javascript interop, and compiler optimizations. From: GoogleDevelopers Views: 1 0 ratings Time: 35:02 More in Science & Technology

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  • Upgraded Ubuntu 12.04 -> 12.10 and Drupal 7 site now get error

    - by Paul B
    I do all my Drupal 7 webdev and today I took advantage to upgrade my local WebDev box O/S to Ubuntu 12.10 from 12.04 and now I get the following errors for all my D7 projects on my localhost WebDev box (Ubuntu 12.10) It was all fine pre Ubuntu 12.04: Error The website encountered an unexpected error. Please try again later. Error message PDOException: SQLSTATE[42000]: Syntax error or access violation: 1286 Unknown storage engine 'InnoDB': SELECT expire, value FROM {semaphore} WHERE name = :name; Array ( [:name] => variable_init ) in lock_may_be_available() (line 167 of /var/www/jobsdaily/includes/lock.inc). A quick research and look into the phpmyadmin (3.4.11.1) and it seems InnoDB is an issue and when I click on a table to see data I get #1286 - Unknown storage engine 'InnoDB'. I have all my D7 sql backed up, but don't really want to go down the whole 'import' route, since it's 10 months work! Anyone had this issues and can anyone suggest fix ideas? Thanks

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  • Aptana Studio 3 does not start up in Ubuntu 12.10

    - by Agent47DarkSoul
    I followed the instructions provided here to install Aptana Studio 3 in my Ubuntu 12.10. I have completed all the steps with out any problems. When I click the Aptana icon in my Unity bar nothing happens. No error pops up! I gave permission on the sh file and on the directory (/opt/Aptana_Studio_3) but still same problem. If I try executing the sh file in the /opt/Aptana_Studio_3 folder, it says "Syntax error: "(" unexpected Aptana". Also I cannot execute the Aptana binary file directly. I have been trying to solve the problem for a while now. Any help would be much appreciated. EDIT: I have Oracle Java 7 installed. I have read some post about backwards compatibility problem with Java 6 but dont know whether that's the issue. I will edit the question if I find something new.

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  • s expression representation for c

    - by wirrbel
    Experimenting with various lisps lately (clojure especially) i have wondered if there are any s expression based representations of (subsets) of c, so you could use lisp/closure to write macros and then convert the s-expression c tree to pure c. I am not asking for a to-c-compilers of lisp/scheme/clojure but more of using lisps to transform a c syntax tree. Little background to why i am asking this question: i find myself to really enjoy certain clojure macros like the threading macros -> doto etc. And i feel that they would be great in a non FP environment as well.

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  • Besides macros, are there any other metaprogramming techniques?

    - by mhr
    I'm making a programming language, and, having spent some time in Lisp/Scheme, I feel that my language should be malleable. Should I use macros, or is there something else I might/should use? Is malleable syntax even a good idea? Is it perhaps too powerful a concept? EDIT: In doing some research, I found fexprs. I don't really understand what these are. Help with that in an answer too please. EDIT2: Is it possible to have a language with macros/something-of-a-similar-nature without having s-expressions?

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  • Is wikipedia a valuable resource for studying data structures? (can we call it complete?)

    - by Amir Nasr
    Can I depend on wikipedia to learn data structures fully using the list of data structures http://en.wikipedia.org/wiki/List_of_data_structures and the links they refer to? The same question for algorithms http://en.wikipedia.org/wiki/List_of_algorithm_general_topics ?... What's after learning algorithms and data structures? Specializing in a certain field of algorithms such as computer graohics, memory management...etc? or what could be the plan for mastering programming after knowing the language syntax and the background about program design and programming logic? I asked about wikipedia because i would like to find a complete resource or are least a resource which would be enough for the field of data structures instead of searching for separate articles in different places in other words an alternative to books which may even be more complete.

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  • getting the user back where they came from with mod_form_auth

    - by bmargulies
    Using the mod_form_auth module in Apache HTTPD 2.4.3, I am looking for a way to have the user redirected to their original desired target after completing a login. That is, if I have a <Location /protected> ... form auth config here </Location> the user might browse to /protected/a, or to protected/b. In either case, they will be presented with the login form. However, as far as I can see, I must specific a single 'success' URL. I'm wondering if I'm missing some Apache feature that would allow me to, for example, cause the redirect to the login form go to something like: https://login.html?origTarget=/protected/a via some syntax on the AuthForLoginRequiredLocation statement?

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  • Java dev learning Python: what concepts do I need to wrap my head around?

    - by LRE
    I've run through a few tutorials and written some small projects. I'm right in the middle of a small project now infact. All is going well enough thanks in no small part to Uncle Google (who usually points me to Stackoverflow ;-) Several times in the last few days I've found myself wondering "what am I missing?" - I feel that I'm still thinking in Java as I write in Python. This question over at StackOverflow is full of tips about what resources to read up on for learning Python, but I still feel that I'm a Java dev with a dictionary (no pun intended) to translate into Python. What I really want to do is refactor my head to be able to write Pythonic Python instead of Java disguised as Python (not that I want to loose my Java skills). So, the crux of my question is: what concepts does a Java dev really need to learn to think Pythonic? This includes anything that needs to be un-learnt. ps: I consider language syntax to not be particularly relevant to this question.

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  • Programming curricula

    - by davidk01
    There are a lot of schools that teach Java and C++ but whenever I see the syllabus for one of these classes it's almost always some cut and dry OO stuff with possibly some boring end of class project. With all the little gadgets and emulators for those gadgets why aren't more schools re-purposing those classes so that the students work their way up to building android or meego applications? That way students get to experience first hand what it takes to engineer/build a piece of software instead of doing finger exercises with syntax. Practically every self-taught programmer that I know started programming because they wanted to make their gadgets do things for them. They didn't learn a programming language with an abstract conception of using it on some far distant project so I don't understand why schools don't emulate this style of teaching.

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  • XRegExp Regular Expression Library for JavaScript

    - by Jan Goyvaerts
    XRegExp is an open source JavaScript library. It extends JavaScript’s regex syntax with features such as free-spacing, named capture, mode modifiers, and Unicode categories, blocks, and scripts. It also provides its own test(), exec(), forEach(), replace(), and split() methods that eliminate most cross-browser inconstencies and bugs. Anyone using non-trivial regexes in their JavaScript code should seriously consider using XRegExp. Last month’s update of the Regular-Expressions.info website added full coverage of XRegExp to the regex tutorial and regex reference sections. But the tools & languages section was missing the XRegExp page, resulting in broken links in the tutorial and reference sections. This page has now been added.

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  • how to "think in templates", i.e. how to know that a problem can be solved using templates and how to adapt to it?

    - by sap
    I decided to improve my knowledge of template meta-programming, i know the syntax and rules and been playing with counteless examples from online resources. i understand how powerfull templates can be and how much compile time optimization they can provide but i still cant "think in templates", that is, i cant seem to know by myself if a certain problem could best be solved with templates (instead of something else) and if it can, how to adapt that problem to templates. so what im asking is, is there some kind of online resource or maybe book that teaches how to identify problems that could best be solved with templates and how to adapt that problem. basically i want to learn to "think in templates". already asked on stackoverflow but once again people just redirected me to resources on how to use templates, when im really asking is how to know when to use template meta-programming and how to adapt that problem to templates. thanks in advance.

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  • Presenting Beginning PowerShell at SQL Saturday 149 MN

    - by merrillaldrich
    I am happy to be presenting a session on beginning PowerShell for DBAs at my new home town’s SQL Saturday! (I moved from Seattle to Saint Paul, MN a short time ago.) I will be sharpening this presentation up to make sure anyone who comes will not go away empty handed. BTW, WOW, the schedule is up and I must admit I did not expect nine tracks of awesome. This looks amazing. My session is geared toward helping those DBAs who have not seen PowerShell, or perhaps may find PowerShell syntax opaque or...(read more)

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  • Mysql not starting - innodb not found

    - by Rob Guderian
    I have a fresh install of ubuntu 12.04 server edition and mysql server is not starting properly. I did a simple apt-get install apt-get install mysql-server But, it's failing with this error message root@test:~# mysqld 120618 20:57:32 [Warning] The syntax '--log-slow-queries' is deprecated and will be removed in a future release. Please use '--slow-query-log'/'--slow-query-log-file' instead. 120618 20:57:32 [Note] Plugin 'FEDERATED' is disabled. 120618 20:57:32 InnoDB: The InnoDB memory heap is disabled 120618 20:57:32 InnoDB: Mutexes and rw_locks use GCC atomic builtins 120618 20:57:32 InnoDB: Compressed tables use zlib 1.2.3.4 120618 20:57:32 InnoDB: Unrecognized value fdatasync for innodb_flush_method 120618 20:57:32 [ERROR] Plugin 'InnoDB' init function returned error. 120618 20:57:32 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed. 120618 20:57:32 [ERROR] Unknown/unsupported storage engine: InnoDB 120618 20:57:32 [ERROR] Aborting I can start the server with the "--skip-innodb --default-storage-engine=myisam" flags, but would like to use innodb. Does anyone know what the issue here is?

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  • Virtual hosting

    - by H3llGhost
    Hello, I want to use domains like xxx.abc.domain.tld. The xxx is my folder to access. I tried it with the rewrite rules, but I can't get it working, because I don't know how to get the part xxx from the SERVER_NAME into my RewriteRule. This was my try: UseCanonicalName Off # include the IP address in the logs so they may be split LogFormat "%A %h %l %u %t \"%r\" %s %b" vcommon CustomLog /var/log/apache2/vaccess.log vcommon RewriteEngine On # a ServerName derived from a Host: header may be any case at all RewriteMap lowercase int:tolower ## deal with normal documents first: # do the magic RewriteCond ${lowercase:%{SERVER_NAME}} ^.+\.abc\.domain\.tld$ RewriteRule ^(.*)$ /var/www/abc.domain.tld/[xxx-part]/$1 [L] Perhaps there is a better solution. In generally I want to create a dynamic login system with mod_auth_mysql and for each xxx is a seperate user database. I would prefer the domain/address syntax abc.domain.tld/xxx, but I don't know how to realize it. Thanks for any advices.

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  • MVC 2 in 2 Minutes!

    - by Steve Michelotti
    In a couple of recent Code Camps, I’ve given my presentation: Top 10 Ways MVC 2 Will Boost Your Productivity. In the presentation, I cover all major new features introduced in MVC 2 with a focus on productivity enhancements. To drive the point home, I conclude with a final demo where I build a couple of screens from scratch highlighting many (but not all) of the features previously covered in the talk. A couple of weeks ago, I was asked to make it available online so here it is. In 2 minutes the demo builds a couple screens from scratch that provide a goal setting tracker for a user. MVC 2 features included in the video are: Template Helpers / Editor Templates Server-side/Client-side Validation Model Metadata for View Model HTML Encoding Syntax Dependency Injection Abstract Controllers Custom T4 Templates Custom MVC Visual Studio 2010 Code Snippets The complete code samples and slide deck can be downloaded here: Top 10 Ways MVC 2 Will Boost Your Productivity. Enjoy! (Right-click and Zoom to view in full screen)   Click here for Direct link to video

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  • Language Design: Are languages like phyton and coffescript really more comprehendable?

    - by kittensatplay
    the "Verbally Readable !== Quicker Comprehension" arguement on http://ryanflorence.com/2011/case-against-coffeescript/ is really potent and interesting. i and im sure other would be very interested in evidence arguing against this. there's clear evidence for this and i believe it. ppl naturally think in images, not words, so we should be designing languages dissimilar to human language like english, french, whatever. being "readable" is quicker comprehension. most articles on wikipedia are not readable as they are long, boring, dry, sluggish, very very wordy, and because wikipedia documents a ton of info, is not especially helpful when compared to much more helpful sites with more practical, useful, and relevant info. but languages like phyton and coffescript are "verbally readable" in that they are closer to the english language syntax, and programming firstly and mainly in python, im not so sure this is really a good thing. the second interesting argument is that coffeescript is an intermediator so thereby another step between to ends, which may increase chances of bugs. while coffeescript has other practical benefits, this question is focused specifically on evidence showing support for the counter-case of language "readability"

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  • What is the annoying/lacking feature in C#, in your opinion?

    - by Vimvq1987
    To be honest, I'm working with C# everyday, and I can say that I love its elegant syntax. But no language is perfect, so does C#. In my opinion, these two features are missing: Full-featured enum. I was pretty happy with enum in C#, until I know about enum in Java. Of course, we can "simulate" a full-featured enum in C# by class, but it's much better if Microsoft simplify this. Immutable keyword. We are told to let a class/struct immutable whenever possible. But to do that, we have to add readonly keyword to every field, and then if we add setter by a mistake, our class will be mutable, and nobody knows. By immutable keyword, every field will be automatically readonly, and any setter will be prohibited (error when compile). It's like static keyword added to class in C# 2.0 well. what's is your annoying/lacking feature in C#?

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  • Simple script - execute command on selected file

    - by askmoo
    I want to make a script that will execute .jar file on selected file. Later I will add that script to right-click menu via the tool Nautilus Actions or just place it into nautilus-scripts folder. I have a problem creating script. When I am in a usual console screen and want to execute this jar file on any other file, I use this syntax myfile.jar ./someotherfile.xml and the jar file will write the output to the console screen. So I created a file script.sh, added lines in it #!/bin/bash /home/username/myfile.jar $1 But it does not output anything. I know I am doing something wrong. Please help. To sum, I need a script that will use selected file as a parameter, open the gnome-terminal, inside that terminal it will start JAR file and pass it the selected file. I am confident that this is a very simple procedure, but I am total newbie with shell scripting.

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  • Why does 'quickly package' fail with "An error has occurred when creating debian packaging"?

    - by slashcrack
    I've got a big problem with packing my quickly application for the Ubuntu App Showdown. When I try to package or submit my application, I get some warnings: quickly package ........ ---------------------------------- WARNING: syntax errors in facebook/FacebookWindow.py: encoding declaration in Unicode string (FacebookWindow.py, line 0) WARNING: the following files are not recognized by DistUtilsExtra.auto: AUTHORS~ facebook/AboutFacebookDialog.py~ facebook/FacebookWindow.py~ facebook/PreferencesFacebookDialog.py~ facebook/__init__.py~ facebook_lib/AboutDialog.py~ facebook_lib/Builder.py~ facebook_lib/PreferencesDialog.py~ facebook_lib/Window.py~ facebook_lib/__init__.py~ facebook_lib/facebookconfig.py~ facebook_lib/helpers.py~ setup.py~ ---------------------------------- An error has occurred when creating debian packaging ERROR: can't create or update ubuntu package ERROR: package command failed Aborting What does the second warning mean? How do I solve those warnings? I want to submit my app to the Ubuntu App developer Showdown into my PPA and it doesn't work. Thanks for any answer.

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  • SQL Concatenate

    - by Bunch
    Concatenating output from a SELECT statement is a pretty basic thing to do in SQL. The main ways to perform this would be to use either the CONCAT() function, the || operator or the + operator. It really all depends on which version of SQL you are using. The following examples use T-SQL (MS SQL Server 2005) so it uses the + operator but other SQL versions have similar syntax. If you wanted to join two fields together for a full name: SELECT (lname + ', ' + fname) AS Name FROM tblCustomers To add some static text to a value: SELECT (lname + ' - SS') AS Name FROM tblPlayers WHERE PlayerPosition = 6 Or to select some text and an integer together: SELECT (lname + cast(playerNumber as varchar) AS Name FORM tblPlayers Technorati Tags: SQL

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  • To use Dart, the Java programmer has to work with 2 languages? [closed]

    - by Sridhar-Sarnobat
    When deciding on a technology to use for web apps, it's become a difficult choice between GWT and Dart and I am looking for guidance in deciding. GWT is a java programmer's dream because they don't have to learn a new language or have to worry about a separate IDE or extra plugin etc. GWT was sold using this value proposition - one didn't need to program in Javascript. But are Google making a U-turn and saying "go through the hassle of learning a new language" afterall? Or is it intended for there to be a Java to Dart compiler so that Java developers do not have to learn a new language? (this is not a rant, so I don't know why you are down-voting the question) Note: "the syntax is very similar" is not a justification. You could say why bother with GWT and just work with Java + Javascript directly.

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  • Why does everyone dislike PHP? [closed]

    - by SomeKittens
    I'm primarily a Java/Python programmer, but I just picked up an entry-level job doing web development. I had to learn PHP, and several of my CS friends told me that it would stunt my coding ability/be terrible to program in/murder me in the middle of the night. So far, there have been annoying moments with the language (one particular thing that bugs me is the syntax for calling functions...), but nothing living up to the statements of my friends. I still haven't learned very much about the language. Is their hate justified? Why or why not? A few quotes I've seen about PHP: Haskell is faster than C++, more concise than Perl, more regular than Python, more flexible than Ruby, more typeful than C#, more robust than Java, and has absolutely nothing in common with PHP. Audrey Tang "PHP is a minor evil perpetrated and created by incompetent amateurs, whereas Perl is a great and insidious evil, perpetrated by skilled but perverted professionals." Jon Ribbens. Programmer.

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