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• Why is the Java VM so popular?

  - by sdudo

  There are more and more programming languages (Scala, Clojure,...) coming out that are made for the Java VM and are therefore compatible with the Java Byte-Code. I'm beginning to ask myself: Why the Java VM? What makes it so powerful or popular that there are new programming languages, which seem gaining popularity too, created for it? Why don't they write a new VM for a new language?

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• Strongest cipher available to use with C/C++ ?

  - by George0x77

  I am just wondering if you are supposed to write a sort of really secure application with data being transmitted over insecure networks, what kind of encryption algorithm will you use it in order to make it safe ? I know several c++ libraries for encryption providing nice functions with different algorithms, but i'm not quite sure which cipher to use - AES, DES, RSA, Blowfish or maybe something more different ? Please provide your ideas and suggestions. Thank you.

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• Quick question regarding Conditional Compilation (ifndef)

  - by sil3nt

  Hello, This is quite probably a very silly question but I need to be sure. I've been given a class declaration in a header file eg. #ifndef file_H #define file_H class ex{ private: public: }; #endif and I've been required to write the method definitions in the same file, which I have done, my question is does the "#endif" stay where it is just after the class declaration or does it go at the end of my file after the class method definitions?.

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• Getting the selected option value in jQuery

  - by misha-moroshko

  I would like to print the selected values of all selects using jQuery. I did it like this, but I feel that there is a nicer way to write the same. Am I right ? $("select").each(function() { alert(this.options[this.selectedIndex].value); });

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• Is a string formatter that pulls variables from its calling scope bad practice?

  - by Eric

  I have some code that does an awful lot of string formatting, Often, I end up with code along the lines of: "...".format(x=x, y=y, z=z, foo=foo, ...) Where I'm trying to interpolate a large number of variables into a large string. Is there a good reason not to write a function like this that uses the inspect module to find variables to interpolate? import inspect def interpolate(s): return s.format(**inspect.currentframe().f_back.f_locals) def generateTheString(x): y = foo(x) z = x + y # more calculations go here return interpolate("{x}, {y}, {z}")

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• .bat for shutdown/reboot on xp loop problem

  - by Luca

  hello! i have a little problem... on win xp, if i write on commandline shutdown -t 00 -r -f the reboot works fine. but if i paste it, as is, in a bat file...the prompt show me an infinite loop. anyone can say me why? thanks a lot for any suggestion :)

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• Which is the easiest way to simulate keyboard and mouse on Python?

  - by Shady

  I need to do some macros and I wanna know what is the most recommended way to do it... So, I need to write somethings and click some places with it and I need to emulate the TAB key to.. Thank you

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• How can I check for unused import in many Python files?

  - by Thierry Lam

  I remember when I was developing in C++ or Java, the compiler usually complains for unused methods, functions or imports. In my Django project, I have a bunch of Python files which have gone through a number of iterations. Some of those files have a few lines of import statement at the top of the page and some of those imports are not used anymore. Is there a way to locate those unused imports besides eyeballing each one of them in each file? All my imports are explicit, I don't usually write from blah import *

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• & symbol problem in htaccess

  - by muralikalpana

  hello.... my current url is categories_name.php?cname=at&t rewritten url like this. carriers/at&t this is htaccess url. RewriteRule ^carriers/(.*)$ categories_name.php?cname=$1 [L] above url is working for all like categories_name.php?cname=all-tel when variable(at&t) has '&' symbol then problem occuring. so how to write htaccess url?

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• join same rails models twice, eg people has_many clubs through membership AND people has_many clubs through committee

  - by Ben

  Models: * Person * Club Relationships * Membership * Committee People should be able to join a club (Membership) People should be able to be on the board of a club (Committee) For my application these involve vastly different features, so I would prefer not to use a flag to set (is_board_member) or similar. I find myself wanting to write: People has_many :clubs :through = :membership # :as = :member? :foreign_key = :member_id? has_many :clubs :through = :committee # as (above) but I'm not really sure how to stitch this together

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• Is there a decent technique for SSIS Derived Column date formatting?

  - by theog

  I just had to write the most redonkulous expression in an SSIS Derived Column to get dates formatted like "01-JAN-2010".  It lookes like this:        There's got to be a better way... isn't there?

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• how to print a newline in a file in plt scheme?

  - by Mark

  I need to have a newline every time I write to a file in plt scheme. I wonder if there is a special procedure that allows me to do this.

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• floating image wrapped by text in android

  - by nourdine

  hello I think the title says it all. I need to accomplish this result in android but it looks like there is no easy fix to my problem. Just to clarify a bit more: if I had to do it in html css I would write something like <img src="Image URL" style="float:left; margin-right: 5px;" /> got it? ;) thanks guyz

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• print_r() and mail() in PHP outputs something different, why?

  - by ilhan

  I have a html form where visitors can fill and send me some information, as an e-mail. It sends like this: $body = print_r($_POST, true); mail ($to, $subject, $body, $headers); When they write abc'def I get abc\'def What is this additional \? How I can prevent it?

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• How to receive post data(XML) in .NET like java servlet doPost

  - by BianJiang

  I want to receive the HTTP POST data(XML), the XML data post by other webServer(Tomcat, shttpd). On Java I can use servlet doPost receive post data, I'm a newbie on C#, I don't know how to write it on c#.

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• Protocol communication help..

  - by Gopal

  Using Visual Studio 2005 Language: c# A new to c# I have software, the software should communicate with gprs devices. So i want to write a protocol, TCP, UDP communication code. Can any one give some idea for writing a source code and some sample code also.

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• CRON job for codeigniter

  - by ASD

  I am using codeigniter. I want to know how to set up a cron job to check a table for expiring users and insert data in to another table with the list of expiring users. How to do that. When i tried to write a script with controller and model to insert the table : Content-type: text/html Fatal error: Class 'Controller' not found in /home/content/html/test/live/application/controllers/cron.php on line 2

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• how to read only english characters

  - by ralph

  I am reading a file that sometimes has chinese and characters of languages other than english. How can I write a regex that only reads english words/letters? should it just be /^[a-zA-Z]+/ ? If I do the above then words like eété will still be picked but I don't want them to be picked: "été".match(/^[a-zA-Z]+/) => #nil good I didnt want that word "eété".match(/^[a-zA-Z]+/) => #not nil tricked into picking something i did not want

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• this["var"+"name"] in java

  - by Maxim

  In AS3 I can write this["foo"] for acces to varible foo. I can construct any string in brackets. Is there a way to do this in Java?

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• SQL is this equivalent to a LEFT JoIn?

  - by Jim

  Is this equivalent to a LEFT JOIN? SELECT DISTINCT a.name, b.name FROM tableA a, (SELECT DISTINCT name FROM tableB) as b It seems as though there is no link between the two tables. Is there an easier / more efficient way to write this?

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• object required error

  - by stack5

  where is error? <script type="text/javascript"> document.write(parent.document.getElementById('ifr2').src) </script>

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• Looping through an array while adding the data to a string and finally returning it, a faster way?

  - by Hadi

  Getting the customer's to_s method by looping through Is there a Ruby idiom to write the code in 1 line (or shorter than 3 lines of code)? def method string = "" @customers.each { |customer| string += customer.to_s + "\n" } string end

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• Using Oracle Zero Date

  - by Noam

  I have an application with existing data, that has Zero in the date column. When I look at it from sqlplus I see: 00-DECEMB when I use the dump function on this column, I Get: Typ=12 Len=7: 100,100,0,0,1,1,1 I need to work with the existing data from .Net (no changes to the data,or the data structure or even existing sql statements) How the hack do I read this value, or write it. The db version varies, from 8 to 11. Help would be appreciated

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• ASP print xml formatted string

  - by Primetime

  I have: tXML = "<type p_type=\"All\"/>"; if I do Response.Write(tXML); I get a blank space. Is there anyway to output this string so I know it is being created?

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• What do people find difficult about C pointers?

  - by Paul

  From the number of questions posted here, it's clear that people have some pretty fundemental issues when getting their heads around pointers and pointer arithmetic. I'm curious to know why. They've never really caused me major problems (although I first learned about them back in the Neolithic). In order to write better answers to these questions, I'd like to know what people find difficult. So, if you're struggling with pointers, or you recently were but suddenly "got it", what were the aspects of pointers that caused you problems?

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