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Deleting from dict if found in new list in Python

Say I have a dictionary with whatever number of values. And then I create a list. If any of the values of the list are found in the dictionary, regardless of whether or not it is a key or an index how do I delete the full value? E.g: dictionary = {1:3,4:5} list = [1] ... dictionary = {4:5} How do I do this without creating a new ...

Flex: List displaying wrong until scrolled.

I have a List, that is not showing any items until you scroll, then the items show up. Does anyone know how to fix this? I tried calling list.invalidateDisplayList(); and list.invalidateList(); But with no luck. Any ideas? Thanks. EDIT: Here is some code: <mx:Script> <![CDATA[ [Bindable] private var _xmlList:XMLList = ...

Text in Flex's list

How can locate text in the mx:List like this? |"text1" "test2"| ----------------------- |"text3" "text4"| ...

How do I show X number of LI from a list using javascript (no frameworks)?

I have a menu that is being populated by a server and I have no access to the server. So I am limited to doing this on the client side. Right now there is a dropdown menu on the navigation with 14 choices. The client wants to only show 3 of them. They're not using any frameworks like jquery or mootools, so I have to do this the old-f...

How do you automap List<float> or float[] with Fluent NHibernate?

Having successfully gotten a sample program working, I'm now starting to do Real Work with Fluent NHibernate - trying to use Automapping on my project's class heirarchy. It's a scientific instrumentation application, and the classes I'm mapping have several properties that are arrays of floats e.g. private float[] _rawY; ...

Python : List of dict, if exists increment a dict value, if not append a new dict

I would like do something like that. list_of_urls = ['http://www.google.fr/', 'http://www.google.fr/', 'http://www.google.cn/', 'http://www.google.com/', 'http://www.google.fr/', 'http://www.google.fr/', 'http://www.google.fr/', 'http://www.google.com/', 'http://www.goo...

sifr menu list problems, height of object calculated wrong

I am using Drupal and have sifr set on list items, and also a, a:hover are set via Drupal so that the links hover. I looked at the sifr3-rules.js file drupal's render module creates and it looks good. and in fact my other sifr items look fine... But the list item ones are goofing for some reason... There is extra space below the list, so...

Searching values of a list in another List using Python

Im a trying to find a sublist of a list. Meaning if list1 say [1,5] is in list2 say [1,4,3,5,6] than it should return True. What I have so far is this: for nums in l1: if nums in l2: return True else: return False This would be true but I'm trying to return True only if list1 is in list2 in the respective order...

finding the maximum length of lists in c#

After I have created a list and added the contents to it, how can I find the length of the list? ...

"Slice lists" and "the ellipsis" in Python; slicing lists and lists of lists with lists of slices.

Original question: Can someone tell me how to use "slice lists" and the "ellipsis"? When are they useful? Thanks. Here's what the language definition says about "slice_list" and "ellipsis"; Alex Martelli's answer points out their origin, which is not what I had envisioned. [http://docs.python.org/reference/expressions.html#tok-slici...

Python: return the index of the first element of a list which makes a passed function true

the list.index(x) function returns the index in the list of the first item whose value is x. is there a function, list_func_index(), similar to the index() function that has a function, f(), as a parameter. the function, f() is run on every element, e, of the list until f(e) returns True. then list_func_index() returns the index of e. ...

What is the benefit to using List<T> over IEnumerable<T>?

or the other way around? I use generic lists all the time. But I hear occasionally about IEnumerables, too, and I honestly have no clue (today) what they are for and why I should use them. So, at the risk of having something on the net forever more proclaiming my ignorance, I humbly post this question. ...

Checking row and column for a word in python

I am trying to create a checking program to see if the word is in a matrix horizontally or vertically. I have the code for checking the row, but would checking the column be similar to the row code? def checkRow(table, r, pos, word): for i in range(0, len(word)): if table[r][pos+i] != word[i]: return False re...

python: list vs tuple, when to use each?

In Python, when should you use lists and when tuples? Sometimes you don't have a choice, for example if you have "hello %s you are %s years old" % x then x must be a tuple. But if I am the one who designs the API and gets to choose the data types, then what are the guidelines? ...

Is List<> better than DataSet for UI Layer in ASP.Net ?

I want to get data from my data access layer into my business layer, then prepare it for use in my UI. So i wonder: is it better to read my data by DataReader and use it to fill a List<BLClasses> or to fill a DataSet and send the DataSet to UI Layer ??. I'm interested in good performance and scalability. ...

Most efficient way to order a list by a preset random.

I have a online PHP system where users vote different awards for their friends, however I am finding that the awards in the middle of the page and at the bottom get less votes overall. I would prefer this to be evenly distributed so came up with ordering the list of awards by random to make it different each time you load the page. This...

Why can't you cast from IList<IParent> to IList<IChild> where IChild implements IParent

Possible Duplicate: IList<Type> to IList<BaseType> I am programming in C# using .NET 2.0 and I don't understand why the cast below results in a null reference. If you have an IList<IChild>, why can't you cast it to an IList<IParent> where IChild implements IParent. using System.Collections.Generic; namespace InterfaceTest { ...

[C#] Creating my own component with DataSource and DataBind()

Hi, I want to do my component that works similar to most of data controls (MS, Telerek, etc.): myControl.DataSource = new List<myClass>(); mycontrol.NameField = "Name"; myControl.ValueField = "Value"; myControl.DataBind; I have some test code: class myClass { public String Name { get { return _name; } } ... } class c...

Get the size of a list in python?

items = [] items.append("shrooms") items.append("meth") items.append("weed") // FAKE METHOD:: items.amount() // should return 3 How I do it right? ...

Is there a known implementation of an indexed linked list?

My gut tells me there is no good way to achieve this, but, unlike Mr. Stephen Colbert, I'd rather trust a community of developers than my gut... Is there a known way to efficiently implement a "best of both worlds" list, one that provides random access by index and O(1) insertion/removal like a linked list? I foresee two possible outco...