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  • Handling SMS/email convergence: how does a good business app do it?

    - by Tim Cooper
    I'm writing a school administration software package, but it strikes me that many developers will face this same issue: when communicating with users, should you use email or SMS or both, and should you treat them as fundamentally equivalent channels such that any message can get sent using any media, (with long and short forms of the message template obviously) or should different business functions be specifically tailored to each of the 3? This question got kicked off "StackOverflow" for being overly general, so I'm hoping it's not too general for this site - the answers will no doubt be subjective but "you don't need to write a whole book to answer the question". I'm particularly interested in people who have direct experience of having written comparable business applications. Sub-questions: Do I treat SMS as "moderately secure" and email as less secure? (I'm thinking about booking tokens for parent/teacher nights, permission slips for excursions, absence explanation notes - so high security is not a requirement for us, although medium security is) Is it annoying for users to receive the same message on multiple channels? Should we have a unified framework that reports on delivery or lack thereof of emails and SMS's?

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  • run .profile function as cron job

    - by Don
    In the .profile file of the root user I have defined a function, e.g. function printDate() { date } I want to run this function every minute and append the output to cron.log. I tried adding the following crontab entry: * * * * * printDate > $HOME/cron.log 2>&1 But it doesn't work. The cron.log file gets created, but it's empty. I guess this is because the .profile isn't read by cron, so any functions/aliases defined therein are unavailable to it. So I tried changing the crontab entry to: * * * * * source $HOME/.profile;printDate >> $HOME/cron.log 2>&1 But this doesn't work either. It seems cron still doesn't have access to the printDate function because I see the following in cron.log /bin/sh: printDate: not found

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  • would a composite design pattern be useful for group membership?

    - by changokun
    I'm trying to think about the best way to handle group memberships on a website. People sign up and select checkboxes in a list of interests. Every week we send out interest-themed emails to those members that indicated that interest. however i store the information in the database, while i am working with the lists and generating lists of email addresses or manipulating group memberships, the composite design pattern looked interesting. it would be easy to populate the group, then do some aggregating functions that say... generate the list of email addresses based on the interests. but i'm not sure i'm seeing any other advantages. i do need something scalable, and flexible. thoughts?

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  • How to understand Linux kernel source code for a beginner?

    - by user16867
    I am a student interested in working on Memory Management, particularly the page replacement component of the linux kernel. What are the different guides that can help me to begin understanding the kernel source? I have tried to read the book Understanding the Linux Virutal Memory Manager by Mel Gorman and Understanding the Linux Kernel by Cesati and Bovet, but they do not explain the flow of control through the code. They only end up explaining various data structures used and the work various functions perform. This makes the code more confusing. My project deals with tweaking the page replacement algorithm in a mainstream kernel and analyse its performance for a set of workloads. Is there a flavor of the linux kernel that would be easier to understand(if not the linux-2.6.xx kernel)?

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  • Store and create game objects at positions along terrain

    - by Alex
    I have a circular character that rolls down terrain like that shown in the picture below. The terrain is created from an array holding 1000 points. The ground is drawn one screen width infront and one screen width behind. So as the character moves, edges are created infront and edges are removed behind. My problem is, I want to create box2d bodies at certain locations along the path and need a way to store these creator methods or objects. I need some way to store a position at which they are created and some pointer to a function to create them, once the character is in range. I guess this would be an array of some sort that is checked each time the ground is updated and then if in range, the function is executed and removed from the array. But I'm not sure if its even possible to store pointers to functions with parameters included... any help is much appreciated!

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  • To mount NAS on a Laptop?

    - by deckoff
    So, I bought a NAS, which I configured successfully in /etc/fstab, on mu Kubuntu 10.10 Thinkpad x40. It works just fine when I am at home. A few days I went out with my laptop and the problem is, that when not at home, both suspend and hibernate functions seem forever to work. I commented out the entry on fstab and the laptop started to work as expected. I played with autofs, but it seems just dies at one moment and I cannot access anything. It works for some time, and then just goes off. Is there any consistent way, to make my laptop access the drive when at home and work OK when away? Probably a script that runs at startup, checks if the mount is there and mounts it if available... or a script that umount the drive at suspend|hibernate and loads it back at startup. Any useful ideas?

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  • Plan variable and call dependencies

    - by Gerenuk
    I'd like to write down the design of my program to understand the dependencies and calls better. I know there are class diagrams which show inheritance and attribute variables. However I'd also like to document the input parameters to method functions and in particular which calls the methods function executes inside (e.g. on the input parameters). Also sometimes it might be useful to show how actual objects are connected (if there is a standard structure). This way I can have a better understanding of the modules and design before starting to program. Can you suggest a method to do this software design? It should be one-to-one to programming code structure so that I really notice all quirks beforehand (instead of high-level design where thing are hard to implement without further work). Maybe some special diagram or tool or a combination? It is static dependency and call design rather than time dependent execution monitoring. (I use Python if you have any specialized recommendations).

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  • Accessing managers from game entities/components

    - by Boreal
    I'm designing an entity-component engine in C# right now, and all components need to have access to the global event manager, which sends off inter-entity events (every entity also has a local event manager). I'd like to be able to simply call functions like this: GlobalEventManager.Publish("Foo", new EventData()); GlobalEventManager.Subscribe("Bar", OnBarEvent); without having to do this: class HealthComponent { private EventManager globalEventManager; public HealthComponent(EventManager gEM) { globalEventManager = gEM; } } // later on... EventManager globalEventManager = new EventManager(); Entity playerEntity = new Entity(); playerEntity.AddComponent(new HealthComponent(globalEventManager)); How can I accomplish this? EDIT: I solved it by creating a singleton called GlobalEventManager. It derives from the local EventManager class and I use it like this: GlobalEventManager.Instance.Publish("Foo", new EventData());

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  • Webmin - Setting up multiple virtual hosts - Subdomains

    - by Aaron
    Can someone please help me in using WEBMIN to setup virtual hosts. My current domain www.MYDOMAINLOLFAKE.com currently functions. Settings are as follows - Apache - Handles the name-based server www.MYDOMAINLOLFAKE.com on all addresses Address Any Port 80 Server Name www.MYDOMAINLOLFAKE.com Document Root /var/www/html BIND DNS Server - Master Zone MYDOMAINLOLFAKE.com ns1.mydomainlolfake.com IPHERE - works ns2.mydomainlolfake.com IPHERE - works mydomainlolfake.com IPHERE - works www.mydomainlolfake.com IPHERE -works mail.mydomainlolfake.com IPHERE - works ftp.mydomainlolfake.com IPHERE - works What I need - something.mydomainlolfake.com -- CANT GET THIS TO WORK What I tried - Create new virtual host Handles the name-based server something.mydomainlolfake.com on something.mydomainlolfake.com Address Any Port 81 Document Root: /var/www/vhosts/something What happens - I create the new VHOST and then ALL address try to go to that new Document root. I need different addresses to go to their respective folders. Can someone please give me better instructions on how to set that up using webmin? TLDR# How do I make a something.mydomainlolfake.com subdomain work in webmin on my CENTOS 6 web server?

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  • True Excel Templates for BI Publisher

    - by Annemarie Provisero
    ADVISOR WEBCAST: True Excel Templates for BI Publisher PRODUCT FAMILY: EBS/ATG/BI Publisher July 12, 2011 at 7am PT, 8 am MT, 10 am ET This one-hour session is recommended for technical and functional users who want to learn how to code Excel formatted layouts for use with BI Publisher to generate binary Excel output. TOPICS WILL INCLUDE: Creating a simple template Formatting Dates Creating Functions A short, live demonstration (only if applicable) and question and answer period will be included. Oracle Advisor Webcasts are dedicated to building your awareness around our products and services. This session does not replace offerings from Oracle Global Support Services. Click here to register for this session ------------------------------------------------------------------------------------------------------------- The above webcast is a service of the E-Business Suite Communities in My Oracle Support. For more information on other webcasts, please reference the Oracle Advisor Webcast Schedule.Click here to visit the E-Business Communities in My Oracle Support Note that all links require access to My Oracle Support.

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  • what knowledge would I need to make a good simulation games

    - by Skeith
    I have an idea for a game like theme park but don't know how simulation games are made. I am not some noob on his first game so I appreciated constructive answers instead of "its hard, don't do it". What I want is to know how simulation game mechanics are put together. I figure it would be heaver on the AI than normal games and not knowing much about AI would like to know some programming techniques I should look into for this style game. specific techniques please not just a book on ai. what sort of architecture would be used? I guess it would have some sort of probability engine with pre designed events that are triggered based on the AI state. Would it use a FSM or be purely event driven ? Any information on how a sims game functions would be cool.

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  • Oracle Exalogic X3-2 Installation and Maintenance Training (from OU)

    - by Javier Puerta
    Many of the Exadata partners in our community are also architecting and servicing Exalogic-based solution. The following training is open to partners and will be of interest. This course introduces the Oracle Exalogic Elastic Cloud X3-2 including new functions and features. It discusses the architecture and components of the server and where they are located in the chassis. The students will learn how to install and configure the Oracle Exalogic Elastic Cloud as well as upgrade its firmware. The course will cover maintaining and servicing field replaceable units (FRU) as well as performing hands-on hardware procedures.  This course is mandatory for all Oracle Partners that wish to become certified to perform Exalogic system installations. Oracle Exalogic X3-2 Services Training - Web Based Training (WBT) description (Link) Oracle Exalogic X3-2 Services Training - Public Course Description on education.oracle.com (Link)

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  • I Don't Understand Anything About Randomly Generated Worlds [closed]

    - by Alex Larsen
    What tools do I need to make a Minecraft-like generated world? I heard about Perlin noise and Simplex, but I don't understand anything about them. So far all I found on the internet was a Simplex version for C#, and all it has is functions, and this is what I get: Console.WriteLine(Noise.Generate(SomeNumber, SomeNumber, SumNumber)); Outputs random floats. I'm really lost. I don't understand the whole random generated worlds concept. Can someone help me? And if I use the noise thing I don't understand how to use it.

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  • Can coding style cause or influence memory fragmentation?

    - by Robert Dailey
    As the title states, I'd like to know if coding style can cause or influence memory fragmentation in a native application, specifically one written using C++. If it does, I'd like to know how. An example of what I mean by coding style is using std::string to represent strings (even static strings) and perform operations on them instead of using the C Library (such as strcmp, strlen, and so on) which can work both on dynamic strings and static strings (the latter point is beneficial since it does not require an additional allocation to access string functions, which is not the case with std::string). A "forward-looking" attitude I have with C++ is to not use the CRT, since to do so would, in a way, be a step backwards. However, such a style results in more dynamic allocations, and especially for a long living application like a server, this causes some speculation that memory fragmentation might become a problem.

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  • asp.net web apps: are OnServerValidate necessary with custom validators

    - by peroija
    I recently created a .net web app that used over 200 custom validators on one page. I wrote code for both ClientValidationFunction and OnServerValidate which results in a ton of repetitive code. My sql statements are parameterized, I have functions that pull data from input fields and validates them before passing to the sql statements or stored procedures. And the javascript validates the fields before the page submits. So essentially the data is clean and valid before it even hits the OnServerValidate and clean after it anyways due to the aforementioned steps. This makes me question, is OnServerValidate really needed when I validate on the clientside?

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  • Algorithm to simplify building/structural meshes

    - by morpheus
    I am looking for an algorithm to simplify the meshes of buildings or similar structures. EDIT: I had made a comment that Hoppe's algorithm tends to make meshes more and more spherical with simplification. But, I am not sure about it, so am deleting the comment. Buildings in contrast should tend to become more and more rectangular with increasing simplification. The D3DX extensions for D3D in version 9.0 (d3dx9.lib) used to have classes to do progressive mesh simplification. See: http://doc.51windows.net/Directx9_SDK/?url=/directx9_sdk/graphics/reference/d3dx/functions/mesh/d3dxgeneratepmesh.htm http://msdn.microsoft.com/en-us/library/windows/desktop/bb281243(v=vs.85).aspx

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  • Is it bad style to redundantly check a condition?

    - by mcwise
    I often get to positions in my code where I find myself checking a specific condition over and over again. I want to give you a small example: suppose there is a text file which contains lines starting with "a", lines starting with "b" and other lines and I actually only want to work with the first two sort of lines. My code would look something like this (using python, but read it as pseudocode): # ... clear_lines() # removes every other line than those starting with "a" or "b" for line in lines: if (line.startsWith("a")): # do stuff if (line.startsWith("b")): # magic else: # this else is redundant, I already made sure there is no else-case # by using clear_lines() # ... You can imagine I won't only check this condition here, but maybe also in other functions and so on. Do you think of it as noise or does it add some value to my code?

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  • Releasing poorly written software...

    - by eddienotizzard
    I've made a poorly written, yet fully functioning website, in (shock, horror, shock) PHP. Everything works as expected, I've implemented the necessary security measures: http://php.net/manual/en/security.php and phpsec.org/projects/guide/ It's poorly written in the sense that it's a bunch of functions thrown together that do something...oddly enough I was consistent with the naming conventions. Would you release something you were not happy with, but worked? I would also like to point out that I don't collect much user information (username, email and password) is about it -- but it's not really the security part I'm worried about, it's the spaghetti code I've written.

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  • How can be data oriented programming applied for GUI system?

    - by Miro
    I've just learned basics of Data oriented programming design, but I'm not very familiar with that yet. I've also read Pitfalls of Object Oriented Programming GCAP 09. It seems that data oriented programming is much better idea for games, than OOP. I'm just creating my own GUI system and it's completely OOP. I'm thinking if is data oriented programming design applicable for structured things like GUI. The main problem I see is that every type widget has different data, so I can hardly group them into arrays. Also every type of widget renders differently so I still need to call virtual functions.

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  • Syncing properties across a game server

    - by Vaughan Hilts
    I'm beginning to implement a simple scripting system into my networked server, and I've hit a snag. Before, I've been wrapping my calls into functions on objects that manipulate objects, but lately I've been finding this to be a pain for simple things. For example, if I set 'player.HP = 1'.. this works server-side. But the player side never sees this change unless I explicitly send a packet to inform the client. For many things like map swapping that require more complicated changes, like change X, Y, Map and do this.. I have a function. That's fine. But what about these small properties I want to sync?

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  • I have a library and several small programs that use it: how should I structure my git repositories?

    - by Dan
    I have some code that uses a library that I and others frequently modify (usually only by adding functions and methods). We each keep a local fork of the library for our own use. I also have a lot of small "driver" programs (~100 lines) that use the library and are used exclusively by me. Currently, I have both the driver programs and the library in the same repository, because I frequently make changes to both that are logically connected (adding a function to the library and then calling it). I'd like to merge my fork of the library with my co-workers' forks, but I don't want the driver programs to be part of the merged library. What's the best way to organize the git repositories for a large, shared library that needs to be merged frequently and a number of small programs that have changes that are connected to changes in the library?

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  • Class Versus Struct

    - by Prometheus87
    In C++ and other influenced languages there is a construct called Structure (struct) and we all know the class. Both are capable of holding functions and variables. some differences are 1. Class is given memory in heap and struct is given memory in stack 2. in class variable are private by default and in struct thy are public My question is that struct was somehow abandoned for Class. Why? other that abstraction, a struct can do all the same stuff a class does. Then why abandon it?

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  • Strategies for removing register_globals from a file

    - by Jonathan Rich
    I have a file (or rather, a list of about 100 files) in my website's repository that is still requiring the use of register_globals and other nastiness (like custom error reporting, etc) because the code is so bad, throws notices, and is 100% procedural with few subroutines. We want to move to PHP 5.4 (and eventually 5.5) this year, but can't until we can port these files over, clean them up, etc. The average file length is about 1000 lines. I've already cleaned up a few of the low-hanging fruit, however the job took almost an entire day for 2 300-500 line files. I am in a quagmire here (giggity). Anyway, has anyone else dealt with this in the past? Are there any strategies besides tracing backwards through the code? Most static analysis tools don't look at code outside of functions - are there any that will look at the procedural code and help find at least some of the problems?

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  • .NET DAL and arhitecture

    - by Parhs
    I have seen lots of articles but none really help me. That is because I want to use dapper as a DAL. Should I create repositories with special functions? Like getStaffActive()? If I use repositories I can implement with dapper-extension a generic crud I have no idea how to handle database connection. Where to open the connection? If I do this at every function then how am I supposed to use transaction scope? Somehow the repositories I work with should share a connection in order transaction to work. But how to do this? Openning connection in BLL? If I use queries and execute them directly then still the same thing.

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  • C++ compiler structures such as Virtual method Table etc

    - by Roger
    I am aware of the C++ Virtual Table which allows dynamic dispatch for doing things at runtime (although if I am honest I am not completely sure of the full list of things it achieves). I am wondering what other "low level" aspects of C++ are there, which one doesnt usually come across when learning the C++ language? Things like: -How is multithreading and locking on objects performed? -Overloading/overwriting functions -Generics Are there other "structures", similar to the vtable, which assist with these types of things on a lower level? (and if anyone can help with what the VTable actually does it would be most appreciated!)

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