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  • Evaluating points in time by months, but without referencing years in Rails

    - by MikeH
    FYI, There is some overlap in the initial description of this question with a question I asked yesterday, but the question is different. My app has users who have seasonal products. When a user selects a product, we allow him to also select the product's season. We accomplish this by letting him select a start date and an end date for each product. We're using date_select to generate two sets of drop-downs: one for the start date and one for the end date. Including years doesn't make sense for our model. So we're using the option: discard_year => true When you use discard_year => true, Rails sets a year in the database, it just doesn't appear in the views. Rails sets all the years to either 0001 or 0002 in our app. Yes, we could make it 2009 and 2010 or any other pair. But the point is that we want the months and days to function independent of a particular year. If we used 2009 and 2010, then those dates would be wrong next year because we don't expect these records to be updated every year. My problem is that we need to dynamically evaluate the availability of products based on their relationship to the current month. For example, assume it's March 15. Regardless of the year, I need a method that can tell me that a product available from October to January is not available right now. If we were using actual years, this would be pretty easy. For example, in the products model, I can do this: def is_available? (season_start.past? && season_end.future?) end I can also evaluate a start_date and an end_date against current_date However, in setup I've described above where we have arbitrary years that only make sense relative to each other, these methods don't work. For example, is_available? would return false for all my products because their end date is in the year 0001 or 0002. What I need is a method just like the ones I used as examples above, except that they evaluate against current_month instead of current_date, and past? and future months instead of years. I have no idea how to do this or whether Rails has any built in functionality that could help. I've gone through all the date and time methods/helpers in the API docs, but I'm not seeing anything equivalent to what I'm describing. Thanks.

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  • Why am i getting these errors from GitHub?

    - by acidzombie24
    I followed these instruction and could not connect to github for the life of me. >plink -ssh github.com FATAL ERROR: Disconnected: No supported authentication methods available plink -ssh [email protected] You've successfully authenticated, but GitHub does not with tortoisegit git.exe push "origin" master ERROR: Permission to name/MyEmptyRepoOnGitHubHere denied to name. fatal: The remote end hung up unexpectedly Whats going on? NOTE: I followed the instructions carefully. It was a lot worse before i followed them.

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  • May volatile be in user defined types to help writing thread-safe code

    - by David Rodríguez - dribeas
    I know, it has been made quite clear in a couple of questions/answers before, that volatile is related to the visible state of the c++ memory model and not to multithreading. On the other hand, this article by Alexandrescu uses the volatile keyword not as a runtime feature but rather as a compile time check to force the compiler into failing to accept code that could be not thread safe. In the article the keyword is used more like a required_thread_safety tag than the actual intended use of volatile. Is this (ab)use of volatile appropriate? What possible gotchas may be hidden in the approach? The first thing that comes to mind is added confusion: volatile is not related to thread safety, but by lack of a better tool I could accept it. Basic simplification of the article: If you declare a variable volatile, only volatile member methods can be called on it, so the compiler will block calling code to other methods. Declaring an std::vector instance as volatile will block all uses of the class. Adding a wrapper in the shape of a locking pointer that performs a const_cast to release the volatile requirement, any access through the locking pointer will be allowed. Stealing from the article: template <typename T> class LockingPtr { public: // Constructors/destructors LockingPtr(volatile T& obj, Mutex& mtx) : pObj_(const_cast<T*>(&obj)), pMtx_(&mtx) { mtx.Lock(); } ~LockingPtr() { pMtx_->Unlock(); } // Pointer behavior T& operator*() { return *pObj_; } T* operator->() { return pObj_; } private: T* pObj_; Mutex* pMtx_; LockingPtr(const LockingPtr&); LockingPtr& operator=(const LockingPtr&); }; class SyncBuf { public: void Thread1() { LockingPtr<BufT> lpBuf(buffer_, mtx_); BufT::iterator i = lpBuf->begin(); for (; i != lpBuf->end(); ++i) { // ... use *i ... } } void Thread2(); private: typedef vector<char> BufT; volatile BufT buffer_; Mutex mtx_; // controls access to buffer_ };

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  • Older iPhone/ iPod frame rate?

    - by Adam
    Do older iPods and iPhones have a frame rate of 60fps? I'm finding that all the methods for calculating time intervals on iPhone (cftimeinterval, nstimer, timesince1970, etc) are all giving me bad data, so I've decided assume a frame rate of 60, just not sure if older apple devices can run at this.

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  • Should we use the Date Object in java?

    - by Jose Conde
    Hi. Should we use de java.util.Date object in java? It has so many Deprecated methods that is a little anoying to have to use a complex method to something that should be so simples. I am using something stupid to emulate getDate() like: public static int toDayMonth (Date dt) { DateFormat df = new SimpleDateFormat("dd"); String day = df.format(dt); return Integer.parseInt(day); } It has to be better way...

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  • Quartz 2D Layers

    - by coure06
    I want to create 2 separate layers using quartz 2D. Can i handle there redraw methods separately? so that i can redraw 1 layer without redrawing the whole screen or other layers. Is it possible? any code sample?

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  • Crash firefox using Javascript

    - by user324675
    I'm part of a testing team and have been tasked with "behaving badly" using javascript in a firefox browser. I've tried these methods to take the browser down http://www.yuki-onna.co.uk/browserdeath.html but none of them do anything worse than cause a popup asking to shut down the script. Any other ideas?

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  • How to bind set of reports to report viwer ?

    - by prasad
    Hi all , I want to print a set of invoice for my application. So I need to display all invoices in report viewer before they print. are there any methods to bind multiple reports to same report viewer using crystal reports or rdlc. I try rdlc but I couldn't find any way to do that. please any one can provide code sample or instruction in C#.net it's worth for me. thank you.......

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  • Sanitizing input for display in view when using simple_format

    - by Eric
    Hi, I'm trying to figure out the right way to display comments such that newlines and links are displayed. I know that usually, you should display user-inputs only when escaping html with h(). That of course won't display newlines or links, so I found the simple_format and auto_link methods. What I am now doing is: simple_format(santize(auto_link(comment.text))) Is this the right way to do this, and is it still safe from XSS attacks? Thanks! Eric

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  • Testing Spring MVC Output

    - by Sammy
    Hello, So I have an MVC project that exposes my services in JSON format. What would be the ideal method of (unit?) testing whether or not my methods return correct content (in terms of JSON syntax as well)? Thank you, Sammy

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  • How to see if an object is an array?

    - by edbras
    How can I see in Java if an Object is an array without using reflection? And how can I iterate through all items without using reflection? I use Google GWT so I am not allowed to use reflection :( I would love to implement the following methods without using refelection: private boolean isArray(final Object obj) { ??.. } private String toString(final Object arrayObject) { ??.. } BTW: neither do I want to use Javascript such that I can use it in non-GWT environments Ed

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  • What's right for me: htAccess, form submittion, HTTP header authentication w/ PHP?

    - by Brook Julias
    I am creating a website with multiple sections--admin, client, user, and anonymous--each user group having less access then the next. I am wondering what form of authentication would be best for my use? I have heard the if you are just dealing with a websites then a web form is for you (because it's prettier). HTTP header authentication with PHP is said to get clunky/sloppy. htAcess is pretty much the hard core of various authentication methods I have looked up, but is it too much?

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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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  • Accessing underlying managed object through a COM interface

    - by mfeingold
    I have a third party assembly with a public abstract class implementing a certain COM interface. Something to the effect of [ComVisible(true)] public abstract class SomeClass: ISomeInterface { .... public void Method1() {...} } The actual object is an internal object extending the SomeClass and is instantiated by the third party code Is there a way to access public methods of this class if all I have is the CCW to the ISomeInterface?

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  • Which is more Efficient HTML DOM or JQuery

    - by Quasar the space thing
    I am trying to add new Elements in an HTML page body by using document.createElement via Javascript, I am doing this with few if/else case and function callings. All is working fine. Recently I came to know that I can do this with JQuery, too. I have not done too much of coding yet so I was wondering which way is the best in terms of efficiency ? Using native DOM methods or using JQuery to add elements dynamically on the page?

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  • IE Overwrite window.top

    - by Dave
    I'm trying to convince a page that it is the window.top even though it is in an iframe. In FF you can do window.defineGetter('top', function() { return window}); in Webkit (Safari/Chrome) you can simply do window.top = window but in IE none of those methods work. Anyone done this before?

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