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  • How to iterate over every property of an object in javascript?

    - by OverloadUT
    Is there a way to iterate over every property of an object using the Prototype JavaScript framework? Here's the situation: I am getting an AJAX response in JSON that looks something like this: {foo: 1, bar: 2, barobj: {75: true, 76: false, 85: true}} If I evaluate that json response in to a variable response, I want to be able to iterate over each property in the response.barobj object to see which indexes are true and which are false. Prototype has both Object.keys() and Object.values() but oddly seems to not have a simple Object.each() function! I could take the results of Object.keys() and Object.values() and cross-reference the other as I iterate through one, but that is such a hack that I am sure there is a proper way to do it!

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  • I do I iterate the records in a database using LINQ when I have already built the LINQ DB code?

    - by Seth Spearman
    I asked on SO a few days ago what was the simplest quickest way to build a wrapper around a recently completed database. I took the advice and used sqlmetal to build linq classes around my database design. Now I am having two problems. One, I don't know LINQ. And, two, I have been shocked to realize how hard it is to learn. I have a book on LINQ (Linq In Action by Manning) and it has helped some but at the end of the day it is going to take me a couple of weeks to get traction and I need to make some progress on my project today. So, I am looking for some help getting started. Click HERE To see my simple database schema. Click HERE to see the vb class that was generated for the schema. My needs are simple. I have a console app. The main table is the SupplyModel table. Most of the other tables are child tables of the SupplyModel table. I want to iterate through each of Supply Model records. I want to grab the data for a supply model and then DoStuff with the data. And I also need to iterate through the child records, for each supply model, for example the NumberedInventories and DoStuff with that as well. I want to only iterate the SupplyModels that are have IDs that are in an array of strings containing the IDs. I need help doing this in VB rather than C# if possible. Thanks for your help. Seth

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  • C++ STL: How to iterate vector while requiring access to element and its index?

    - by Ashwin
    I frequently find myself requiring to iterate over STL vectors. While I am doing this I require access to both the vector element and its index. I used to do this as: typedef std::vector<Foo> FooVec; typedef FooVec::iterator FooVecIter; FooVec fooVec; int index = 0; for (FooVecIter i = fooVec.begin(); i != fooVec.end(); ++i, ++index) { Foo& foo = *i; if (foo.somethingIsTrue()) // True for most elements std::cout << index << ": " << foo << std::endl; } After discovering BOOST_FOREACH, I shortened this to: typedef std::vector<Foo> FooVec; FooVec fooVec; int index = -1; BOOST_FOREACH( Foo& foo, fooVec ) { ++index; if (foo.somethingIsTrue()) // True for most elements std::cout << index << ": " << foo << std::endl; } Is there a better or more elegant way to iterate over STL vectors when both reference to the vector element and its index is required? I am aware of the alternative: for (int i = 0; i < fooVec.size(); ++i) But I keep reading about how it is not a good practice to iterate over STL containers like this.

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  • Are there any other ways to iterate through the attributes of a custom class, excluding the in-built ones?

    - by Ricardo Altamirano
    Is there another way to iterate through only the attributes of a custom class that are not in-built (e.g. __dict__, __module__, etc.)? For example, in this code: class Terrain: WATER = -1 GRASS = 0 HILL = 1 MOUNTAIN = 2 I can iterate through all of these attributes like this: for key, value in Terrain.__dict__.items(): print("{: <11}".format(key), " --> ", value) which outputs: MOUNTAIN --> 2 __module__ --> __main__ WATER --> -1 HILL --> 1 __dict__ --> <attribute '__dict__' of 'Terrain' objects> GRASS --> 0 __weakref__ --> <attribute '__weakref__' of 'Terrain' objects> __doc__ --> None If I just want the integer arguments (a rudimentary version of an enumerated type), I can use this: for key, value in Terrain.__dict__.items(): if type(value) is int: # type(value) == int print("{: <11}".format(key), " --> ", value) this gives the expected result: MOUNTAIN --> 2 WATER --> -1 HILL --> 1 GRASS --> 0 Is it possible to iterate through only the non-in-built attributes of a custom class independent of type, e.g. if the attributes are not all integral. Presumably I could expand the conditional to include more types, but I want to know if there are other ways I'm missing.

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  • Is it possible to iterate all the OutputCache keys?

    - by Deane
    Is it possible to iterate the OutputCache keys? I know you can remove them individually via HttpResponse.RemoveOutputCacheItem(), but is there a way I can iterate all the keys to see what's in the collection? I searched through Object Viewer, but didn't see anything. Worst case, I can maintain my own index. Since I'm doing everything by VaryByCustom, they get "fed" through a method in global.asax. It just strikes me that there has to be a more elegant way of doing this.

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  • I need to iterate a loop to every time find the string appearing after a particular string say "if(O

    - by Parth
    I need to iterate a loop to every time find the string appearing after a particular string say "if(OLD.", then which PHP function will be helpful for me? Suppose I have a variable say, $string, according to any select query say "select * friends", Now any of its value contain a string say "how are you Jack?" Now I want to iterate a loop around the above value containing variable to get the varying name of friends after a string "how are you "... Hence I need a function of PHP to accomplish it... Please help

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  • ASP.NET MVC/LINQ: What's the proper way to iterate through a Linq.EntitySet in a View?

    - by Terminal Frost
    OK so I have a strongly-typed Customer "Details" view that takes a Customer object Model. I am using LINQ to SQL and every Customer can have multiple (parking) Spaces. This is a FK relationship in the database so my LINQ-generated Customer model has a "Spaces" collection. Great! Here is a code snippet from my CustomerRepository where I iterate through the Customer's parking spaces to delete all payments, spaces and then finally the customer: public void Delete(Customer customer) { foreach (Space s in customer.Spaces) db.Payments.DeleteAllOnSubmit(s.Payments); db.Spaces.DeleteAllOnSubmit(customer.Spaces); db.Customers.DeleteOnSubmit(customer); } Everything works as expected! Now in my "Details" view I want to populate a table with the Customer's Spaces: <% foreach (var s in Model.Spaces) { %> <tr> <td><%: s.ID %></td> <td><%: s.InstallDate %></td> <td><%: s.SpaceType %></td> <td><%: s.Meter %></td> </tr> <% } %> I get the following error: foreach statement cannot operate on variables of type 'System.Data.Linq.EntitySet' because 'System.Data.Linq.EntitySet' does not contain a public definition for 'GetEnumerator' Finally, if I add this bit of code to my Customer partial class and use the foreach in the view to iterate through ParkingSpaces everything works as expected: public IEnumerable<Space> ParkingSpaces { get { return Spaces.AsEnumerable(); } } The problem here is that I don't want to repeat myself. I was also thinking that I could use a ViewModel to pass a Spaces collection to the View, however LINQ already infers and creates the Spaces property on the Customer model so I think it would be cleanest to just use that. I am missing something simple or am I approaching this incorrectly? Thanks!

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  • How do I use Linq-to-sql to iterate db records?

    - by Seth Spearman
    I asked on SO a few days ago what was the simplest quickest way to build a wrapper around a recently completed database. I took the advice and used sqlmetal to build linq classes around my database design. Now I am having two problems. One, I don't know LINQ. And, two, I have been shocked to realize how hard it is to learn. I have a book on LINQ (Linq In Action by Manning) and it has helped some but at the end of the day it is going to take me a couple of weeks to get traction and I need to make some progress on my project today. So, I am looking for some help getting started. Click HERE To see my simple database schema. Click HERE to see the vb class that was generated for the schema. My needs are simple. I have a console app. The main table is the SupplyModel table. Most of the other tables are child tables of the SupplyModel table. I want to iterate through each of Supply Model records. I want to grab the data for a supply model and then DoStuff with the data. And I also need to iterate through the child records, for each supply model, for example the NumberedInventories and DoStuff with that as well. I need help doing this in VB rather than C# if possible. I am not looking for the whole solution...if you can supply a couple of code-snippets to get me on my way that would be great. Thanks for your help. Seth

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  • How can i iterate through QListWidget items and work with each item?

    - by Hossein
    In CSharp its as simple as writting : listBox1.Items.Add("Hello"); listBox1.Items.Add("There"); foreach (string item in listBox1.Items ) { MessageBox.Show(item.ToString()); } and i can easily add different objects to a list box and then retrieve them using foreach. I tried the same approach in Qt 4.8.2 but it seems they are different.though they look very similar at first.I found that Qt supports foreach so i went on and tried something like : foreach(QListWidgetItem& item,ui->listWidget->items()) { item.setTextColor(QColor::blue()); } which failed clearly.It says the items() needs a parameter which confuses me.I am trying to iterate through the ListBox itself, so what does this mean? I tried passing the ListBox object as the parameter itself this again failed too: foreach(QListWidgetItem& item,ui->listWidget->items(ui->listWidget)) { item.setTextColor(QColor::blue()); } So here are my questions: How can I iterate through a QListWidget items in Qt? Can i store objects as items in QListWidgets like C#? How can i convert an object in QListWidgets to string(C#s ToString counter part in Qt) ? (suppose i want to use a QMessagBox instead of that setTextColor and want to print out all string items in the QlistWidget.)

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  • Is there a way to iterate over all open windows in Mac OS X?

    - by Alex
    When you unplug an external monitor with a higher resolution that your macbook from your laptop, the windows mostly retain their width, but their size gets clipped to the (smaller) height of the macbook screen. When you plug the monitor back in, their size remains frustratingly small. My question is: is there any way that I can iterate over all open windows, save their size, and restore them once the monitor gets plugged in again?

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  • How to iterate with Selenium RC over XPath results directly?

    - by Gj
    I'm currently resorting to first doing a get_xpath_count, and then creating a loop incrementing an index variable, which in turn I inject back into the original xpath to select the nth result... very awkward no doubt. Is there some simple, direct, elegant way to iterate directly over the xpath results? Thanks!

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  • What's the new way to iterate over a Java Map in Scala 2.8.0?

    - by Alex R
    How does scala.collection.JavaConversions supercede the answers given here: http://stackoverflow.com/questions/495741/iterating-over-java-collections-in-scala (doesn't work because the "jcl" package is gone) and here http://www.eishay.com/2009/05/iterating-over-map-with-scala.html (doesn't work me in a complicated test which I'll try to boil down and post here later) The latter is actually a Scala Map question but I think I need to know both answers in order to iterate over a java.util.Map. Thanks

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  • How can I iterate through all of the Models in my rails app?

    - by James
    I would like to be able to iterate over and inspect all the models in my rails app. In pseudo-code it would look something like: rails_env.models.each do |model| associations = model.reflect_on_all_associations(:has_many) ... do some stuff end My question is how do I inspect my rails app to get a collection of the models (rails_env.models) ?

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