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  • a good book about software design

    - by Idan
    i'm looking for a book that talks about sofware decision like : when should i use thread pool and shouldn't. and in the first case, explains how. how should i acess my DB , how big my transactions should be how to read XML, to use DOM or SAX, what library to choose, and best ways to parse how to handle client-server app best efficient way and more stuff like that. is a book like that exist ? (preferably in c++ but not that important)

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  • What are some good Cognos tutorials?

    - by every_answer_gets_a_point
    i am a data analyst and programmer and i want to learn cognos. i suppose the only way to do it is to either pay 10k for classes or get an internship where i shadow someone who already uses it. does anyone know how i can get a tutorial for cognos and put on my resume that i reasonable understand how to use it?

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  • What's a good Minimal Server-Side Javascript Framework?

    - by Nick Retallack
    So I was writing a web app with web.py that uses plenty of client-side javascript, and my database is on couchdb so the queries are in javascript too, and eventually I just got to thinking, why not skip the python and go all javascript? Besides, some functions need to run once on the client and again on the server to make sure you're not spoofing, so why translate between javascript and python? So I'm looking for a simple lightweight javascript web framework. All I really need is the url routing, request and response stuff (standard wsgi?), and a way to hook into a big http server like nginx. What do you guys recommend?

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  • What is good practice in .NET system architecture design concerning multiple models and aggregates

    - by BuzzBubba
    I'm designing a larger enterprise architecture and I'm in a doubt about how to separate the models and design those. There are several points I'd like suggestions for: - models to define - way to define models Currently my idea is to define: Core (domain) model Repositories to get data to that domain model from a database or other store Business logic model that would contain business logic, validation logic and more specific versions of forms of data retrieval methods View models prepared for specifically formated data output that would be parsed by views of different kind (web, silverlight, etc). For the first model I'm puzzled at what to use and how to define the mode. Should this model entities contain collections and in what form? IList, IEnumerable or IQueryable collections? - I'm thinking of immutable collections which IEnumerable is, but I'd like to avoid huge data collections and to offer my Business logic layer access with LINQ expressions so that query trees get executed at Data level and retrieve only really required data for situations like the one when I'm retrieving a very specific subset of elements amongst thousands or hundreds of thousands. What if I have an item with several thousands of bids? I can't just make an IEnumerable collection of those on the model and then retrieve an item list in some Repository method or even Business model method. Should it be IQueryable so that I actually pass my queries to Repository all the way from the Business logic model layer? Should I just avoid collections in my domain model? Should I void only some collections? Should I separate Domain model and BusinessLogic model or integrate those? Data would be dealt trough repositories which would use Domain model classes. Should repositories be used directly using only classes from domain model like data containers? This is an example of what I had in mind: So, my Domain objects would look like (e.g.) public class Item { public string ItemName { get; set; } public int Price { get; set; } public bool Available { get; set; } private IList<Bid> _bids; public IQueryable<Bid> Bids { get { return _bids.AsQueryable(); } private set { _bids = value; } } public AddNewBid(Bid newBid) { _bids.Add(new Bid {.... } } Where Bid would be defined as a normal class. Repositories would be defined as data retrieval factories and used to get data into another (Business logic) model which would again be used to get data to ViewModels which would then be rendered by different consumers. I would define IQueryable interfaces for all aggregating collections to get flexibility and minimize data retrieved from real data store. Or should I make Domain Model "anemic" with pure data store entities and all collections define for business logic model? One of the most important questions is, where to have IQueryable typed collections? - All the way from Repositories to Business model or not at all and expose only solid IList and IEnumerable from Repositories and deal with more specific queries inside Business model, but have more finer grained methods for data retrieval within Repositories. So, what do you think? Have any suggestions?

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  • Need good RDLC examples/samples

    - by Sachin
    I am in evaluation phase of report tool. I prefer RDLC for the same. But I need some examples/samples available in the wild which can guide us on using the RDLC off the shelf. I would be looking for examples from as simple as list of data and as complex as using matrix, calculation, grouping, etc. This will help us to make a reference point if anytime we get stuck up somewhere.

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  • good methods for boolean operations on overlapping polygons

    - by BenjaminGolder
    What is the best open source library for performing boolean operations (union, intersect, subtract) on shapefiles? What do you like to use? OGR looks like it probably has this capability, though I'm having trouble finding the particular commands in their documentation. Shapely definitely does this, and is easy to understand. PostGIS appears to also have some commands for this. But there must be more, and I'm having trouble finding them. I don't have much experience with any of the, and would appreciate any opinions on these or other libraries. Thanks!

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  • Which type of file parsing easiest and efficient and good ?(html,pdf,csv,text)

    - by Harikrishna
    I want to parse the html file, pdf file, csv file and text file. Now parsing for which type of file (specified above) is easiest and efficient ? Like parsing for html file is easiest and efficient OR parsing for pdf file is easiest and efficient OR parsing for csv file is easiest and efficient ? I am asking this question because I want to parse pdf ,html ,csv and text file through common parsing code if possible. And now suppose if parsing for html is easiest and efficient then : I will write the parsing code for html file and will try to convert pdf file to the html file(if possible)so the code written for parsing html file will also work for pdf file also. And thus I will try to convert pdf,csv and text file to html file.And write the code for parsing html file and thus this code will parse html,pdf,csv and text file. Suppose if parsing for pdf is easiest and efficient then : I will convert html,csv and text file to pdf and write the code for parsing pdf file.So the code for parsing pdf file can parse html,csv and text file. So my question is (1) Which type of file parsing is easiest and efficient (pdf,csv,html,text) ? (2) And converting files(pdf,text,html,csv) to eachother is possible. Like if html parsing easiest then pdf to html,text to html and csv to html.

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  • good database design for localization

    - by rap-uvic
    Hi, I have 3 tables for localization: Locales, ResourceKeys, and Resources. Resources is a many to many table between ResourceKeys and Locales, and stores Resource values for each resource key in multiple languages. Now if I have a table called Event, which needs a localized title and description, how do I best do this? Do I create foreign key columns in Event table which point to ResourceKey IDs each for title and description, or is there a better way?

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  • Know a good IP address Geolocation Service?

    - by carrier
    I'd like to get your impressions on any ip geolocation (as in IP to location) service services you may have employed? I'm looking for something free or cheap, which shouldn't be unrealistic because I need to make a very small volume of requests. Anything with python bindings would be especially ideal.

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  • What'd be a good pattern on Doctrine to have multiple languages

    - by PERR0_HUNTER
    Hi! I have this challenge which consist in having a system that offers it's content in multiple languages, however a part of the data contained in the system is not translatable such as dates, ints and such. I mean if I have a content on the following YAML Corporativos: columns: nombre: type: string(254) notnull: true telefonos: type: string(500) email: type: string(254) webpage: type: string(254) CorporativosLang: columns: corporativo_id: type: integer(8) notnull: true lang: type: string(16) fixed: false ubicacion: type: string() fixed: false unsigned: false primary: false notnull: true autoincrement: false contacto: type: string() fixed: false unsigned: false primary: false notnull: true autoincrement: false tipo_de_hoteles: type: string(254) fixed: false unsigned: false primary: false notnull: true autoincrement: false paises: type: string() fixed: false unsigned: false primary: false notnull: true autoincrement: false relations: Corporativo: class: Corporativos local: corporativo_id foreign: id type: one foreignAlias: Data This would allow me to have different corporative offices, however the place of the corp, the contact and other things can be translate into a different language (lang) Now this code here would create me a brand new corporative office with 2 translations $corporativo = new Corporativos(); $corporativo->nombre = 'Duck Corp'; $corporativo->telefonos = '66303713333'; $corporativo->email = '[email protected]'; $corporativo->webpage = 'http://quack.com'; $corporativo->Data[0]->lang = 'en'; $corporativo->Data[0]->ubicacion = 'zomg'; $corporativo->Data[1]->lang = 'es'; $corporativo->Data[1]->ubicacion = 'zomg amigou'; the thing now is I don't know how to retrieve this data in a more friendly way, because if I'd like to access my Corporative info in english I'd had to run DQL for the corp and then another DQL for the specific translation in english, What I'd love to do is have my translatable fields available in the root so I could simply access them $corporativo = new Corporativos(); $corporativo->nombre = 'Duck Corp'; $corporativo->telefonos = '66303713333'; $corporativo->email = '[email protected]'; $corporativo->webpage = 'http://quack.com'; $corporativo->lang = 'en'; $corporativo->ubicacion = 'zomg'; this way the translatable fields would be mapped to the second table automatically. I hope I can explain my self clear :( any suggestions ?

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  • Good Package for Fitting Polynomial Trend Lines

    - by Rev316
    Given a simple data set, I would like to be able to calculate a trending formula given it's a second order polynomial regression. In fact, it would be great if one could even forecast X periods during calculation (similar to what Excel does). I'm looking for a portable C/C++ package that's relatively easy to use, and allows it to spit out the "best-fit" (highest R^2 value) curve. Any suggestions? Thanks!

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  • What is a good git server frontend for self hosted git repositories

    - by Ritesh M Nayak
    I am planning on deploying git for a project I am currently working on and was wondering if there are any free softwares that provide an easy to use web view of the git repository. I am primarily interested in using the front end to track changes, see diff information etc. There is a list of such front ends available here. Does anyone have any experience with any of these ? Which one would you suggest An open source clone of github would do just fine actually :D but I know thats too much to ask .

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  • What good alternatives to CHM are there for context sensitive help documents in desktop applications

    - by ninesided
    We currently have a number of desktop applications (PowerBuilder, Winforms, WPF) that make use of a single CHM for context sensitive help. We'd like to move away from CHM as it's difficult to maintain but we've not found a suitable alternative. Ideally we'd like our developers to keep the help files up to date (perhaps in a wiki) as they add funtionality and simply export this to PDF or something like that, but is it possible to use a PDF for context sensitve help, or are there any other promising alternative to CHM?

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  • good/full Boot Spirit examples using version 2 syntax

    - by bpw1621
    Almost all of the examples I've gone and looked at so far from: http://boost-spirit.com/repository/applications/show_contents.php use the old syntax. I've read and re-read the actual documentation at http://www.boost.org/doc/libs/1_42_0/libs/spirit/doc/html/index.html and the examples therein. I know Joel is starting a compiler series on the blog http://boost-spirit.com/home/ but that hasn't gotten in full swing yet. Any other resources to see worked examples using some more sophisticated/involved aspects in the context of fully working applications?

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  • good way to implement NotSpecification: isSpecialCaseOf?

    - by koen
    I'm implementing the specification pattern. The NotSpecification seems simple at first: NotSpecification.IsSpecialCaseOf(otherSpecification) return !this.specification.isSpecialCaseOf(otherSpecification) But it doesn't work for all Specifications: Not(LesserThan(5)).IsSpecialCaseOf(GreaterThan(4)) This should be true. So far I think that the only way to accomplish the isSpecialCaseOf the NotSpecification is to implement the remainderUnsatisfiedBy (partial subsumption in the paper on the specification pattern). But maybe I am missing something more simple or a logical insight that makes this unnecessary. Question: Is there another way of implementing this by not using remainderUnsatisfiedBy?

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  • A good resource for an overview of web technologies

    - by Vijay
    Hello Every one, I have been working on microsoft based web technologies (.net, sql server, iis) for about an year and would like to know the opensource alternatives for the above. I have heard of LAMP, Java based technologies, ruby on rails etc. Can you please point me to a place where I can find more information about these and how they match up against each other. Basically I am looking for an overview of the popular web technologies in today's world. Thanks a lot. Vijay

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