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  • Financial Charts / Graphs in Ruby or Python

    - by Eric the Red
    What are my best options for creating a financial open-high-low-close (OHLC) chart in a high level language like Ruby or Python? While there seem to be a lot of options for graphing, I haven't seen any gems or eggs with this kind of chart. http://en.wikipedia.org/wiki/Open-high-low-close_chart (but I don't need the moving average or Bollinger bands) JFreeChart can do this in Java, but I'd like to make my codebase as small and simple as possible. Thanks!

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  • How can I bulk rename files in a RAR or ZIP archive on the mac?

    - by Chris R
    I have a set of archive files -- both zip and rar formats -- inside of which I need to rename some files. Specifically, I want to do something like this: for each archive file in a directory for each file in the archive if the file name matches the regular expression /(.* - [0-9]{2})([0-9]{2} - .)*/ rename the file as \1-\2 The trick isn't so much in the generation of the new name; I can do that with either bash or sed or anything else. It's the set of commands to manipulate the files in the archives using rar/unrar or unzip/zip (If it makes a difference, I'm re-formatting some CBR/CBZ files to get the double-page spreads to come up in the right order in SimpleComic -- it interprets page 0203 as page 203, which makes the story a bit hard to follow)

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  • Why and why not Coldfusion (CFML) ?

    - by zarko.susnjar
    When you speak to your colleagues or you want to convince your client to use Coldfusion for some new project and not some other technology or language they heard of before, which arguments do you use? I'm asking because I'd like to make presentation to put in my company's portfolio and seems that I can't find any real life, non development kind of arguments. Yes, cfquery and cffunction access="remote" make our lives easier, but client doesn't care too much about us, right?

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  • Need algorithm to add Node in binary tree

    - by m.qayyum
    •if your new element is less or equal than the current node, you go to the left subtree, otherwise to the right subtree and continue traversing •if you arrived at a node, where you can not go any deeper, because there is no subtree, this is the place to insert your new element (5)Root (3)-------^--------(7) (2)---^----(5) ^-----(8) (5)--^ i want to add this last node with data 5...but i can't figure it out...I need a algorithm to do that or in java language

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  • Installing Linux from External Card Reader

    - by Subhamoy Sengupta
    I have this problem. I was experimenting if I could use a memory card (SDHC) as an USB drive for all intents and purposes, and when I put the card in an USB card reader, I can use it just like regular USB stick and it also shows up in the BBS popup menu as an USB stick. When I tried to create an installation media out of it like this: sudo dd if=/path/to/image of=/dev/sdb And tried to boot from it, simply nothing happened. Cursor blinked a couple times, and jumped to the GRUB of my pre-existing GNU/Linux installation. What am I missing here? Is this not doable? I tried this with Xubuntu 12.04 and ArchLinux, by the way. I have also tried UNetBootIn instead of dd. Nothing happened differently.

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  • Why is the ( ) mandatory in the SQL statement select * from gifts INNER JOIN sentgifts using (giftID

    - by Jian Lin
    Why is the ( ) mandatory in the SQL statement select * from gifts INNER JOIN sentgifts using (giftID); ? The ( ) usually is for specifying grouping of something. But in this case, are we supposed to be able to use 2 or more field names... in the example above, it can be all clear that it is 1 field, is it just that the parser is not made to bypass the ( ) when it is all clear? (such as in the language Ruby).

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  • How to properly document programming languages?

    - by roydukkey
    Where can I find information on how to properly document a programming language? What I mean is that there seems to be a standard way to document code. php.net and api.jquery.com seem to document there code the a similar way. For example, the trim() description on php.net. string trim ( string $str [, string $charlist ] ) And likewise on jquery.com .animate( properties, [ duration ], [ easing ], [ callback ] ) Does anyone even know what this syntax is called?

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  • Python vs. Java performance (runtime speed)

    - by Bijan
    Ignoring all the characteristics of each languages and focusing SOLELY on speed, which language is better performance-wise? You'd think this would be a rather simple question to answer, but I haven't found a decent one. I'm aware that some types of operations may be faster with python, and vice-versa, but I cannot find any detailed information on this. Can anyone shed some light on the performance differences?

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  • How can I demonstrate the benefits of abstractions to an old-time C programmer?

    - by Zaban Khuli
    Hi, there's this senior developer in my company that programs in C. I happen to be from functional background (ML, to be specific). This senior C programmer refuses to use abstractions because "abstraction is for lame programmers and _real_ programmers do not need it." I can not seem to convince him otherwise Is it a problem with only this programmer or do all C (and other lower level language) programmers have this opinion that abstraction is for lame programmers?

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  • Recommendation on C# books

    - by Oliver Bayes-Shelton
    Hi, I am looking to buy my first c# book. At the moment amazon have a special offer on two titles: Sams Teach Yourself the C# Language Sams Teach Yourself Visual C# 2008 Is their a difference between visual C# and C#? Also which book would be better for an intro to C#?

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  • MonoRail - How to grab records where a column isn't null

    - by Justin
    Hey, In MonoRail/Active Record if I want to grab all records that have a certain column equal to null, I can do: public static Category[] AllParentCategories() { return (FindAllByProperty("Parent.Id", null)); } However, what if I want to grab all records where that column doesn't equal null? I can't figure out how to do that using this FindAllByProperty method, is there another method that is more flexible or a way to grab records using a linq-like querying language? Thanks, Justin

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  • MySQL ODBC 3.51 Driver UTF-8 encoding

    - by kesava
    Currently I am migrating MSSQL to MYSQL.I am using the MySQL ODBC 3.51 driver to connect to mysql using odbc connectivity.I have telugu language charectors stored in the table.They are not showing properly while using the mysql odbc driver, but they are showing up properly while using the sqlserver odbc driver. Here is my connetion string Driver={MySQL ODBC 3.51 Driver};Server=localhost;Database=dbtest; User=user1;Password=mysql;Option=3;CharSet=utf8; Please suggest a solution to fix this.

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  • How to remove line breaks (or carriage returns) only from certain parts of a block of text?

    - by Luke Allen
    Whenever I copy formatted text from a PDF file which is formatted to have line breaks (or carriage returns), I need to find a way to remove these line breaks without removing the paragraph format. To do this I need to use RegEx (Regular expressions) to only remove the line breaks which aren't preceded by a period. So for example, if a string of text has a line break right after a period, that is obviously almost always a legitimate line break which will start a new paragraph. If a string of text has a line break mid-word or after a word with no period, it's simply part of the bad formatting I need to get rid of. My problem is that I don't know how to use RegEx to make it only remove the ^p tags in word or CRLF or line breaks in any format under the conditions that it omits ones following a period.

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  • Split internal USB pinouts - is it possible?

    - by TM
    I've currently got a situation in my PC where I have 3 devices that connect to the motherboard via the onboard USB pinouts. The problem is, I only have two sets of USB pinouts on my motherboard. Is there any way of connecting two devices to one set of pinouts? Essentially, I'm looking for the functionality of a USB hub, but I'd like it to be inside the case, and provide pinouts rather than regular USB ports. Update: I don't need any more USB ports, I have devices that use the USB pinouts. I already have extra USB ports that aren't used, so adding an PCI USB card doesn't really help anything.

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  • Expert R users, what's in your .Rprofile?...

    - by gappy
    This question is maybe a little too cute, but I have always found startup profile files of other people both useful and instructive about the language. Moreover, while I have some customization for bash and vim, I have nothing for R. For example, one thing I always wanted is different colors for input and output text in a window terminal, and maybe even syntax highlighting.

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  • Reg Expression htaccess RewriteRule

    - by Rick
    I am new to using regular expressions for rewriting URL's in htaccess I need to redirect mysite.com/123 to mysite.com/, IF cookie named 'ref' is set. my current htaccess is: <IfModule mod_rewrite.c> RewriteEngine On RewriteBase / RewriteCond %{HTTP_COOKIE} ref=true [NC] RewriteRule ^/([0-9]+)/$ http://www.mysite.com </IfModule> The goal is that when someone enters site with: mysite.com/111(some number) that they are redirected to the home page of the site after the cookie is set. Be nice... I'm new! ;o)

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  • delete a file in protected mode env(like windows xp)

    - by JGC
    hi I write a program to delete a file from somewhere of my harddisk in 8086 but when i use int 21h (ah=41h) an error happens and carry set to 1.and I cannot delete that. does anyone know what can I do? I think it should be from protected mode which does not allow my program to delete another file.I want the answer and language is not matter.

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  • Where are the java swing String for me to translate?

    - by Tom Brito
    The JFileChooser don't provide support for my language, I'd translate strings defined in the file http://www.rgagnon.com/javadetails/JavaUIDefaults.txt with the UIManager.put(), but I'm not finding the popup strings ("view", "refresh" and "new folder" options when you right-click). Does anyone know where can I find them to translate?

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  • linux tooling for starting as a net programmer

    - by alfredo dobrekk
    What are the linux developper tools to do the things i do with .NET in my windows environnement : I would like to port my client server application that runs under winform/nhibernate/sql server. Language c# Database SQL server ORM Nhibernate Source control SVN / Tortoise Unit testing Nunit Continuous integration Cruise Control Should i go java and eclipse ? Python and ??? Ruby and ??? Is there some IDE that allow me to manage all these processes under linux ?

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  • What should I do during the summer?

    - by zamN
    I have just recently graduated from High School and I am looking for something productive to do over the summer. I was thinking of possibly learning a new language that can give me an edge in school or a good project to pursue that will look good on my resume for future jobs. Also how would I go about getting a job right out of high school or interning for a company for the summer? Thanks in advance.

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  • Is Prince the best way to create PDFs in Ruby on Rails?

    - by Angela
    After several Google searches, it appears that the way to create PDFs in Rails from HTML and CSS (versus a new markup language) is to use Prince. With licensing at $3800 for my non-big-commercial app, I'm wondering if this is, in fact, consensus or people have an alternative they can share the whats and hows.

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