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• What is a code-kata and what is it good for?

  - by Roland Schneider

  in the past few weeks I have heard about a phenomenon called 'code-kata'. When I get it right, it means coding an exercise again and again. What is its point? Does it improve your abillity to design better software? If yes, why does it do so?

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• Getting memory usage from 'ps aux' output with awk

  - by JustB

  Hello everybody, I have to solve an exercise using awk. Basically I need to retrieve from 'ps aux' command the total of memory usage for each user and format like this: User Total%Mem user1 3.4% user2 1.5% and so on. The problem I can't seem to solve is: how do I know how many users are logged in? And how can I make a different sum for each one of them? Thank you :)

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• C readline function

  - by nunos

  In an assignment for college it was suggested to use the c readline function in an exercise. I have searched for its reference but still haven't found it. Does it really exist? In which header? Can you please post the link to the reference? Thanks.

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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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• Array of Objects in Core Data Entity?

  - by Abdulla

  I've got two entities, one named exercise and the other named workout. I would like to store several different exercises in each workout object. What is the correct logic here? Create an array of exercises in each workout?

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• OpenXML - using Excel sheet as template vs. a "real" Excel template

  - by marc_s

  Does anyone have any good answer what kind of difference there is between using some arbitrary pre-formatted Excel 2007 *.xlsx file as a template, loading it in my C# app, and filling up some of its cells with data using the Microsoft OpenXML SDK versus creating specific Excel templates (*.xltx) files and using those as basis for my "data filling" exercise Do I loose something when I don't use the Excel templates (*.xltx)? If so - what do I loose?

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• Is the Android NotePad tutorial compatible with Android version 2 ?

  - by Emanuil

  Here's my story: I downloaded the tutorial files. I created an Android project based on the tutorial files for the completed exercise (located in the Notepadv3Solution folder) I run the project and bellow is a screenshot of what appears: It seems like it's not working properly. Could it be because I'm running on version 2.2?

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• What is the meaning of this Scheme

  - by Ding

  Hi, I am new to Scheme, by looking at the Exercise 1.5 of SCIP, what is the meaning/usage of this expression? (define (p) (p)) Thanks!

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• My first Lisp macro; is it leaky?

  - by Tom Martin

  I've been working through Practical Common Lisp and as an exercise decided to write a macro to determine if a number is a multiple of another number: (defmacro multp (value factor) `(= (rem ,value ,factor) 0)) so that : (multp 40 10) evaluates to true whilst (multp 40 13) does not The question is does this macro leak in some way? Also is this "good" Lisp? Is there already an existing function/macro that I could have used?

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• Create Shortcut key out side the application.

  - by dhaiwat

  Hi Friends, i want to do this exercise: i have one app like "helloworld.app". when user "longpress" of any key say "A".in short i want to create "shortcut key" for my app how can i set listener for it. please share if anyone come with it.

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• Ways to prepare your mind before coding?

  - by kmilo

  Coding is a very attention consuming exercise, how do you prepare yourself to begin a good coding session? I use to be more calm and ready to think in a useful way after reading some insightful new posts from my rss reader.

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• Finding the complement of a regular expression

  - by Bo Tian

  There's a question on my exercise sheet to find the complement of r = (a|b)*ab(a|b)* I've come up with a solution, but I'm not sure if it's correct. Please help me to check, and correct my errors. Thanks in advance.

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• How to suppress all Warnings

  - by Eric

  The unit tests for a product that I am taking over have not been kept up with during the products development and they are very broken. I am trying to fix them as an exercise to become familiar with the code. However, the all the deprecation warnings are a PITA as they interfere with the display of the test results. Is there a way to suppress the warnings when I execute the unit tests? Thanks!

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• What's the difference between single and double quotes in Objective-C?

  - by Alex Mcp

  I'm working through a book exercise to generate some random serial number, and here's my function: NSString *randomSerialNumber = [NSString stringWithFormat:@"%c%c%c%c%c", '0' + random() % 10, 'A' + random() % 26, '0' + random() % 10, 'A' + random() % 26, '0' + random() % 10]; This works and has an output like: 2J6X7. But before, the 0s and As I had wrapped in double quotes, and an example output was 11764iÒ˜. What did I do wrong my first time around, and why did using single quotes fix it?

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• What are good patterns or supporting fixtures to write unit tests for Maven plugins?

  - by Ian Dickinson

  I'm developing a Maven plugin, and I realise I'm not sure how to write unit tests for it since I don't know how to exercise the functionality of the plugin except by just running Maven. How have other Maven plugin developers managed testing of their code?

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• How would you program Pascal's triangle in R?

  - by Peter Flom

  I am reading, on my own (not for HW) about programming, and one exercise involved programming Pascal's triangle in R. My first idea was to make a list and then append things to it, but that didn't work too well. Then I thought of starting with a vector, and making a list out of that, at the end. Then I thought of making a matrix, and making a list out of that at the end. Not sure which way to even approach this. Any hints? thanks

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• ValueError: Too Many Values to Unpack Aptana Studio 3

  - by GTyler

  I am working on exercise 13 from learnpythonthehardway.org. I should run this code: from sys import argv script, first, second, third = argv print "The script is called:", script print "Your first variable is:", first print "Your second variable is:", second print "Your third variable is:", third Then enter "python ex13.py first 2nd 3rd" on command line. However, I am using Aptana Studio 3 on Vista and I get the "ValueError: too many values to unpack" error. I am new to Python and Aptana so how can I enter the separate arguments here?

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• where can I get these kind of exercises to solve?

  - by flash

  Recently I did a Java programming exercise successfully which was sent by a recruiting firm, The problem statement goes like this 'There are two text files FI(records abt files and directory information) and FS(containing blocks of data) which represent a file Index and file System respectively and I was supposed to write a static read method in a class which will read the file from the FS depending upon the path string provided using FI' My question is where can I get these kind of exercises to solve, the complexity should be above average to tough.

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• What practical use/benefit does a ternary 'bit' based computer have?

  - by John

  Prototype working ternary device Quantum computing with qbits and so on is one thing, but what exactly do we stand to gain from a CPU which works on a ternary basis, where each 'bit' is ether yes/no/maybe (or true/false/filenotfound)? Is it simply an academic exercise or could it change processor design?

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• What are some good resources for writing a chess engine?

  - by Paul Wicks

  I'm interested in writing a chess engine (mostly as a learning exercise) and would be interested in any resources that people know of that could be of interest or use, anything really: Papers, Books, Theory, Tutorials, anything that could be useful.

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• Definition of domains in mySQL?

  - by mal

  I'm working on a college exercise and have the following question: What is the domain of the "country" table? My understanding of domain is that it defines the possible values of an attribute. This means that the table "country" doesn't have a domain, but the various attributes in the table "country" have their own domains. For example the attribute "SurfaceArea" has the domain FLOAT(10,2) and the attribute "Name" has the domain CHAR(52). Is this correct?

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• How to synchronize multiple proccess in c through basic signal handling

  - by atreyu

  Hi, people. For a academic exercise i have to implement a program in c for nix platform which is to synchronize multiple processes through signal handling, using only signal,pause,kill and fork basic functions. I searched google and have not found any clear example: I hope the wisdom of one of you will light my way. Thanks!

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• Do you know any mainstream desktop applications developed with Python and Qt?

  - by systempuntoout

  Hi i'm developing a small prototype of a desktop application using Qt and Python because i would like to distribute it in a multiplatform way. A friend of mine is annoying me on messenger because he claims that there are not known cool mainstream desktop apps developed with Qt and python technologies so, what i am doing, is just an exercise without future. Do you know any cool apps developed in python+Qt? thanks

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• How to lock serialization in java?

  - by PaulP89

  I am just starting with JAVA serialization, I have one exercise to do and I need to lock serialization on any class, it is suppose to throw an exception when I attempt to serialize that class. Does anyone know how to do it? Thank you

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• Where do I find good example data? [closed]

  - by Silvanus

  Where do people find sample data that they need for development but can't get directly from their employer for whatever reason? I am looking to rewrite my employers' delivery track and trace software as an exercise.

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