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  • How to calculate the length of a Path2D in Java?

    - by Sanoj
    I have some paths represented by Path2D. The Path consist of multiple CubicCurve2D or Line2D segments that are connected to each other. I would like to calculate or get the length from the start to the end of a Path. How can I calculate it or get it? Is it possible? I have checked the API documentation, but couldn't find any useful methods.

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  • How to create a "Clustergram" plot ? (in R)

    - by Tal Galili
    Hi all, I came across this interesting website, with an idea of a way to visualize a clustering algorithm called "Clustergram": I am not sure how useful this really is, but in order to play with it I would like to reproduce it with R, but am not sure how to go about doing it. How would you create a line for each item so it would stay consistent throughout the different number of clusters? Here is an example code/data to play with for potential answer: hc <- hclust(dist(USArrests), "ave") plot(hc)

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  • Usefulness of Toggle functions

    - by roygbiv
    Is it better to write functions that explicitly do something (i.e. HideForm/ShowForm etc...) or is it better to write 'Toggle' type functions (i.e. ToggleVisibility)? I find Toggle type functions awkard because it's hard to track the state by reading the code. In what situations is a toggle type function useful?

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  • Java2D Distance Collision Detection

    - by Trizicus
    My current setup is only useful once collision has been made; obviously there has to be something better than this? public boolean CollisionCheck(Rectangle rect1, Rectangle rect2) { if(rect1.intersects(rect2)) { return true; } return false; } How can I do preemptive collision detection?

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  • What is a 'Closure'?

    - by Ben
    I asked a question about Currying and closures where mentioned. What is a closure? How does it relate to currying? Additional: Kyle's answer is great but to my poor procedural/OO mind Ben Childs answer is really useful.

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  • What is SimpleTest?

    - by Doug
    What is SimpleTest? What does assertTrue($b) do? Why is SimpleTest useful and how might it be ideal for real world usage? Is it even practiced often?

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  • Where can I get VS code snippets?

    - by mafutrct
    Apparently there are many questions that deal with how to store code snippets for Visual Studio, but I did not find one that contains links. So, is there a website that offers useful snippets? My google-fu only brought up many false positives or broken sites.

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  • Is there an SCM tool made for solo programmers with key logging built in?

    - by pokstad
    Are there any Source Code Management (SCM) tools made specifically for solo programmers or small groups of programmers that tracks every small change made to source code in real time? This would require all key strokes to be tracked, and any other small changes like GUI UI editing. This seems like it would be a very useful tool for a programmer trying to remember a fix he did an hour ago that they didn't manually commit.

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  • CharacterType/ConfigurationType in vsprops

    - by Cthutu
    Hi, I've been using Visual Studio's property sheets for building my code and I have a useful hierarchy of sheets controlling the build settings, rather than having them in the vcproj files. This is great except for one thing. I can't seem to set properties in the Project Defaults section such as CharacterType and ConfigurationType. I tried using a VCConfiguration tool in the vsprops but to no avail: <Tool Name="VCConfiguration" ConfigurationType="4" /> Can anyone tell me how this is accomplished please?

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  • Implementing a continuous "revert-buffer" aka Textpad

    - by vedang
    One of my colleagues uses TextPad, and one feature I found really useful is the Auto-Reload. (The feature has been described in this SO quesion: http://stackoverflow.com/questions/1246083/alternative-to-textpads-prompt-to-reload-file). Basically, it keeps reloading the file without any prompt from the user, which is really helpful when monitoring log files that are updated in real-time. Is there something similar available for Emacs? If not, can anyone whip up the required elisp magic?

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  • SecurityFlushSessionListener in jboss

    - by techzen
    In jboss-web.deployer/conf/web.xml there is a listener defined called SecurityFlustSessionListener. This listener searches for the component java:comp/env/security/securityMgr and if not found prints that info in the debug log. It is understood that if this security feature is not needed then, one can simply remove this listener. How have you used this listener for configuring security at the time of session destroying? As in, can you highlight the use cases of this listener and the scenarios where it was found useful?

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  • Process.Start in C# = php ?

    - by Karandeep Singh
    In .NET The Process class contains several useful properties/methods that allow developers to access process relative information. Have you any equivalent method or class in php. Have any equivalent method in php like c# method "Process.Start()".

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  • Using LCD with Arduino

    - by Nik
    Hi, Is it possible to use any LCD with arduino or I need to stick to some for which the libraries are available. I'm just starting out with arduino and know nothing about interfacing LCDs with arduino. I'm planing to buy Old IPhone LCD as they are cheap and big enough to do something useful with them. Also to use iPhone LCD do I need to add some extra circuit or directly plugging iPhone LCD into arduino will work? I don't care about the touch feature right now.

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  • Sorting a string in array, making it sparsely populated.

    - by S1syphus
    For example, say I have string like: duck duck duck duck goose goose goose dog And I want it to be as sparsely populated as possible, say in this case duck goose duck goose dog duck goose duck What sort of algorithm would you recommend? Snippets of code or general pointers would be useful, languages welcome Python, C++ and extra kudos if you have a way to do it in bash.

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  • EF Query Object Pattern over Repository Example

    - by Dale Burrell
    I have built a repository which only exposes IEnumerable based mostly on the examples in "Professional ASP.NET Design Patterns" by Scott Millett. However because he mostly uses NHibernate his example of how to implement the Query Object Pattern, or rather how to best translate the query into something useful in EF, is a bit lacking. I am looking for a good example of an implementation of the Query Object Pattern using EF4.

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  • Good places to share and showcase software on the web?

    - by jay
    Quite simply: is there a place such as DeviantArt, but purely for the purpose of sharing software (and source if preferred)? I'm aware that DA has plenty of software, but only related to customisations and UI hacks. I recently came across some really useful apps I had made from way back and besides posting it on an online code hosting site or a personal portfolio that no one will ever find, is there some more community-ish places on the internet I've missed out on where coding mercenaries share and show off?

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  • How to capture user's keystroke times in openmoko?

    - by Berkay
    i will use this data for modelling the user, any good resource or tutorial will be appreciated.(this will be my first experience with openmoko) For example i'm trying to calculate: Key hold time: The time difference between pressing a key and releasing it Digraph time: The time difference between releasing one key and pressing the next one Error rate: The number of times backspace key is pressed. thanks (any kind of useful information for openmoko to help me this problem will be appreciated.)

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  • Thread safety in Singleton

    - by Robert
    I understand that double locking in Java is broken, so what are the best ways to make Singletons Thread Safe in Java? The first thing that springs to my mind is: class Singleton{ private static Singleton instance; private Singleton(){} public static synchronized Singleton getInstance(){ if(instance == null) instance = new Singleton(); return instance; } } Does this work? if so, is it the best way (I guess that depends on circumstances, so stating when a particular technique is best, would be useful)

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  • What is the easiest language to start with?

    - by Teifion
    What is the language with the lowest barriers to entry, simplest syntax, easiest setup. I'm aware that there's not a best language but I am sure that there will be one that's got a good score in all three areas. It's for teaching friends how to program, I like PHP and Python but I don't want to be narrow minded and limit myself when there is a better option out there. Common suggestions Ruby Python Basic C Java C# Useful links Best Ways To Teach A Beginner to Program Why's (Poignant) Guide to Ruby Think Python

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