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• How does JSON compare to XML in terms of file size and serialisation/deserialisation time?

  - by nbolton

  I have an application that performs a little slow over the internet due to bandwidth reasons. I have enabled GZip which has improved download time by a significant amout, but I was also considering whether or not I could switch from XML to JSON in order to squeeze out that last bit of performance. Would using JSON make the message size significantly smaller, or just somewhat smaller? Let's say we're talking about 250kB of XML data (which compresses to 30kB).

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• Good book for learning Bash shell?

  - by John Isaacks

  I want to learn how to write shell scripts. Particularly I want to write a svn post-commit script to upload files from a test server to a production server. I am sure I will want to write more as I get more into it. I have very little linux/unix knowledge. Can anyone recommend a good book?

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• How to fetch parameters when using the Apache Commons CLI library

  - by Mridang Agarwalla

  I'm using the Apache Commons CLI to handle command line arguments in Java. I've figured out my way around it to a decent extent but I need a little help. I've declared the a and b options and I'm able to access the value using CommandLine.getOptionValue. Usage: myapp [OPTION] [DIRECTORY] Options: -a Option A -b Option B How do I declare and access the DIRECTORY variable? Thank you.

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• Introduction to midi programming

  - by bobobobo

  So I have a little (musical) keyboard that has USB midi interface. I know you can program to this (many programs accept input from the midi device via USB interface) but where do you begin to program a midi device? Ideally I'm looking for a platform-independent api, through Python or something.

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• Turn off Jquery UI Accordion animation only during page load

  - by Matt H

  I'd like to turn off the accordian animation during page load, and then turn it back on after the page is loaded. Basically I've got multiple forms inside the accordion sections and when submitted the page gets reloaded and the relevant section is reloaded. But during the reload the animation is triggered which looks a little ugly. But I like it when the page is not being loaded. How do I achieve this effect?

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• which situation abstract class i should use

  - by Bharanikumar

  Hi , Am not worked on extream level of oops in my projects , So i have little doubts , In which situation should i use abstract method or classes , Basically i know about abstract class definition and flow, I got details from this URL Doubt is which situation should i use abstract class and methods ,

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• What's a good gift for a theoretical computer science teacher? [closed]

  - by Goose Bumper

  I've been fortunate to have two very good theory professors; I've take 'Algorithms' and 'Advanced Algorithms' with them, and both classes have been outstanding. I'd like to get them "fun" theory books, something like Proofs Without Words but a little cheaper. Any recommendations?

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• How to safely let users run arbitrary Ruby code?

  - by igul222

  I realize this sounds a little crazy, but I'm working on a project for which I need a server to run user-provided Ruby code and return the result. I'm looking to prevent something like this: system("rm -rf /") eval("something_evil") # etc... I'm sure there must be some reasonably safe way to do this, as it already exists at places like tryruby.org. Any help is greatly appreciated, thanks!

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• Using jQuery To Get Size of Viewport

  - by Volomike

  How do I use jQuery to determine the size of the browser viewport, and to redetect this if the page is resized? I need to make an IFRAME size into this space (coming in a little on each margin). For those who don't know, the browser viewport is not the size of the document/page. It is the visible size of your window before the scroll.

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• What is the recommended way to do DRY web development (SASS+HAML, LessCSS, etc) in non-Ruby projects

  - by T.R.

  I've been looking to make things a little more DRY, both on my personal projects (django) and at work (JSP/struts,PHP). SASS+HAML seem to be quite popular, but, do those outside of the Rails community generally use these as well, or do they opt for other similar solutions? Which do you use, and what was the reasoning behind the choice?

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• how to set different views for admin and user

  - by alienavatar

  Hi I am little new to SharePoint. Here is my question How can we make different views for administrator VS logged in user. For instance I need to display the quicklaunch only to admin and not for user. And user should not see site actions tab. How can we set this. Please can anyone come up with solution or any blog that we can refer? Thanks in advance.

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• Simple C question

  - by Meko

  HI all. I am trying to make little program that reads data from file which has name of user and some data for that user. I am new on C , and how can i calculate this data for its user?line by line reading and adding each char in array? And how can I read line? is there any function?

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• Why isn't the SQLiteOpenHelper called just SQLiteHelper?

  - by Emanuil

  The documentation describes the class as a helper object to create, open, and/or manage a database. Having that in mind wouldn't you say that the name is a little misleading?

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• Why is C++ backward compatible with C ? Why isn't there some "pure" C++ language ?

  - by gokoon

  C and C++ are different languages, blababla we know that. But if those language are different, why is it still possible to use function like malloc or free ? I'm sure there are all sort of dusty things C++ has because of C, but since C++ is another language, why not remove those things to make it a little less bloat and more clean and clear ? Is it because it allows programmers to work without the OO model or because some compilers doesn't support high-level abstract features of C++ ?

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• Java GUI guidance on building a chat box

  - by Allen

  I'm just looking for a little guidance as to how i might implement a chat box. There needs to be a text area for user entry, and a scrolling list of past messages. Is there an easy/standard way of going about doing this? Thanks

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• Dividing into fractors in C#

  - by Shane

  Simple question I think, I am a little unsure as to why decimal currentPercentage = 0; currentPercentage = currentPercentage*((decimal)1 / (decimal)daysPerYear--);//or currentPercentage *= ((decimal)1 / (decimal)daysPerYear--); Will return 0 everytime but (decimal)1 / (decimal)daysPerYear--; will return the decimal I am after. What am I missing here?

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• Good C++ Debugging/IDE Environment for Linux?

  - by Brandon Pelfrey

  I have a friend who is trying to make the switch to Linux, but is hung up on the apparent lack of debugging/IDE environments for C++, especially as they relate to template programming. He has been using visual studio for years and is maybe a little spoiled by their awesome IDE. Does anyone have any good suggestions for an environment where he can, under Linux, develop and debug with all of the usual things (Breakpoints, line highlighting for compilation errors, step in/over/out/etc, etc) that he's accustomed to? Thanks!

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• How many registers in custom VM?

  - by DeadMG

  I'm designing a custom VM and am curious about how many registers I should use. Initially, I had 255, but I'm a little concerned about backing 255 pointers (a whole KB) on to the stack or heap every time I call a function, when most of them won't even be used. How many registers should I use?

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• how to start learning JavaScript

  - by antriksh

  Dear All, I am experienced in the technical support like Linux, oracle, sunos etc and but if i say scripting i know little bit of bash. Now i promoted to manage technical engineers including some JavaScript developers, so i want to learn JavaScripting so that i can understand engineers. Hope you understand. Can you please advise me how can i start JavaScripting and point me to some simple docs and examples.

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• Is there a better way to declare an empty, typed matrix in MATLAB?

  - by Arthur Ward

  Is there a way to "declare" a variable with a particular user-defined type in MATLAB? zeros() only works for built-in numeric types. The only solution I've come up with involves using repmat() to duplicate a dummy object zero times: arr = repmat(myClass(), [1 0]) Without declaring variables this way, any code which does "arr(end+1) = myClass()" has to include a special case for the default empty matrix which is of type double. Have I missed something a little more sensible?

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• is there any programming language that can bring together edit and compile / run ???

  - by Aff

  When I code, I always write little pieces of unit, and compile it often. This helps me to make sure that everything run correctly, but it's very time consumed. is there any programming language that can support us to do coding and running at the same time side by side ? i mean as soon as a key press leads to valid code, the effect of the edit is incorporated into the executing program.

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• JSONP & jQuery Chunking

  - by Tom

  Hi Guys, I am wanting to utilize JSONP for a project with x-domain scripting but little concerned with the 2048 character limit in IE. Does JSONP support "chunking" automatically if character size exceeds 2048 ? If yes, does anyone have any examples they can share ? Thx

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• Pretty Pixel-level Picture Painting, Programatically

  - by dreeves

  My mac laptop has 1,024,000 pixels. What's the simplest way to turn my display completely black and go nuts with writing little programs to twiddle pixels to my heart's delight? To make it more concrete, say I wanted to implement the Chaos Game to draw a Sierpinski triangle, at the pixel level, with nothing else on the screen. What are ways to do that?

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• Java: how to read BufferedReader faster

  - by Cata

  Hello, I want to optimize this code: InputStream is = rp.getEntity().getContent(); BufferedReader reader = new BufferedReader(new InputStreamReader(is)); String text = ""; String aux = ""; while ((aux = reader.readLine()) != null) { text += aux; } The thing is that i don't know how to read the content of the bufferedreader and copy it in a String faster than what I have above. I need to spend as little time as possible. Thank you

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• Best programming based games

  - by Matt Sheppard

  Back when I was at school, I remember tinkering with a Mac game where you programmed little robots in a sort of pseudo-assembler language which could then battle each other. They could move themselves around the arena, look for opponents in different directions, and fire some sort of weapon. Pretty basic stuff, but I remember it quite fondly, even if I can't remember the name. Are there any good modern day equivalents?

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