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  • Python - read numbers from text file and put into list

    - by user1647372
    So like the title says im starting to learn some python and im having trouble picking up on this technique. What I need to accomplish is to read in some numbers and store them in a list. The text file looks like the following: 0 0 3 50 50 100 4 20 Basically these are coordinates and directions to be used for python's turtle to make shapes. I got that part down the only problem is getting them in a correct format. So what I can not figure out is how to get those numbers from the file into [ [0, 0, 3, 50], [50, 100, 4, 20] ] A list, with each four coordinates being a list in that one big list. Heres my attempt but it as I said I need some help - thank you. polyShape=[] infile = open(name,"r") num = int(infile.readline(2)) while num != "": polyShape.append(num) num = int(infile.readline(2)) infile.close()

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  • YUI vs jQuery, for css style layouts

    - by tony
    Hi Complete novice question. I've used jQuery a bit, YUI not at all and know very little about it. I work on a website thats IE specific, we're now looking at making it cross browser. jQuery seems great at hiding the differences between browsers from a javascript point of view. However in terms of css layout is it YUI that I should really be looking at? thanks

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  • Choosing randomly all the elements in the the list just once

    - by Dalek
    How is it possible to randomly choose a number from a list with n elements, n time without picking the same element of the list twice. I wrote a code to choose the sequence number of the elements in the list but it is slow: >>>redshift=np.array([0.92,0.17,0.51,1.33,....,0.41,0.82]) >>>redshift.shape (1225,) exclude=[] k=0 ng=1225 while (k < ng): flag1=0 sq=random.randint(0, ng) while (flag1<1): if sq in exclude: flag1=1 sq=random.randint(0, ng) else: print sq exclude.append(sq) flag1=0 z=redshift[sq] k+=1 It doesn't choose all the sequence number of elements in the list.

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  • Java Util Linked List - how to find next?

    - by drozzy
    When using Java LinkedList how do you find out the element's next or previous relationships? I mean, in a regular linked list I would do something like this: Node node1 = new Node(); Node node2 = new Node(); LinkedList list = new LinkedList(); list.add(node1); list.add(node2); //then my node1 will know who it's next is: assertEquals(node2, node1.next()); But in Java's LinkedList, the data does not seem to be modified. So how do I actually find out who the "next" (or "previous" in the case of doubly-linked lists) element is?

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  • jQuery plugin to style objects

    - by Alex
    Hi. I've been looking at the various JavaScript UI libraries and am wondering if there's one that can add some styling to page elements. I'm currently adding rounded corners, shadows, borders, and gradients via my own CSS + hacks to get it working on IE. I'm using jQuery for a number of tasks and wondered if there's a plugin that can add these design flairs more easily to DIVs. Not that you want to go overboard with this stuff, but when you need to use it, you'd like to depend on cross-browser and tried-and-tested solutions. Thanks.

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  • Java interface 'interview'-style problem

    - by Codenotguru
    Problem/Task: Write an interface with one method and two classes that implement this interface. Now write a main method with an array that holds an instance of each class. Using a for-each loop, invoke the method upon each item. Is this an interview question? (I'm not sure if the author meant to post this as a question or was looking for an answer to the above.)

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  • int vs const int&

    - by Valdo
    I've noticed that I usually use constant references as return values or arguments. I think the reason is that it works almost the same as using non-reference in the code. But it definitely takes more space and function declarations become longer. I'm OK with such code but I think some people my find it a bad programming style. What do you think? Is it worth writing const int& over int? I think it's optimized by the compiler anyway, so maybe I'm just wasting my time coding it, a?

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  • including .h files.

    - by Max
    Suppose I have two .h files: A.h and B.h. Moreover, A.h includes B.h itself: B.h - declares class B. class B { ... }; A.h - declares class A, which uses class B. #include B.h class A { void SomeFunction(const B& b); }; Now, I have some .cpp file, that uses both A and B classes (B class maybe used not only in A::SomeFunction(B)) What are the pluses to include both A.h and B.h (instead of only A.h) from the perspective of design-patterns and coding style.

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  • Managing a list of threads

    - by Satanlike
    Hi, I have an application (.Net 3.5) which creates threads to write something to the database so that the GUI does not block. All created threads are added to a list, so that I can wait (Thread.Join) for each thread when the application is closed (maybe not all threads are finished when the application is closed, so the app must wait for them). Because of the list I get some serious problems if there are too many threads created (OutOfMemoryException). I tried removing finished threads from the list, but somehow that didn't work. Are there better ways to manage a list of threads, so I can remove them once they are finished?

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  • Folding a list in F#

    - by bytebuster
    I have a pretty trivial task but I can't figure out how to make the solution prettier. The goal is taking a List and returning results, based on whether they passed a predicate. The results should be grouped. Here's a simplified example: Predicate: isEven Inp : [2; 4; 3; 7; 6; 10; 4; 5] Out: [[^^^^]......[^^^^^^^^]..] Here's the code I have so far: let f p ls = List.foldBack (fun el (xs, ys) -> if p el then (el::xs, ys) else ([], xs::ys)) ls ([], []) |> List.Cons // (1) |> List.filter (not << List.isEmpty) // (2) let even x = x % 2 = 0 let ret = [2; 4; 3; 7; 6; 10; 4; 5] |> f even // expected [[2; 4]; [6; 10; 4]] This code does not seem to be readable that much. Also, I don't like lines (1) and (2). Is there any better solution?

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  • How to assign variable dynamically to php list function

    - by ravisoni
    What I am doing that I want to generate a list based on how many items are in an array, so I have counted the items and loop over them, create a number based var and construct a string $var which contains $a1,$a2.... and assigns the $var to list list($var) and tried to access $a1 but it gives me the error "Undefined variable: a1" Is there any other way to do it? Here is my code: $arr = array('1','2','3'); $listsize = count($arr); $var=''; for($i=1;$i<=$listsize;$i++){ $var.='$a'.$i; if($i!=$listsize){ $var.=','; } } list($var) = $arr; echo $a1;

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  • List of running minimum values

    - by scarle88
    Given a sorted list of: new []{1, 2, -1, 3, -2, 1, 1, 2, -1, -3} I want to be able to iterate over the list and at each element return the smallest value iterated so far. So given the list above the resultant list would look like: 1 1 -1 -1 -2 -2 -2 -2 -2 -3 My rough draft code looks like: var items = new []{1, 2, -1, 3, -2, 1, 1, 2, -1, -3}; var min = items.First(); var drawdown = items.Select(i => { if(i < min) { min = i; return i; } else { return min; } }); foreach(var i in drawdown) { Console.WriteLine(i); } But this is not very elegant. Is there an easier to read (linq?) way of doing this? I looked into Aggregate but it seemed to be the wrong tool. Ultimately the list of items will be very long, in the many thousands. So good performance will be an issue to.

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  • Convert list to double[][] in C#3.0

    - by Newbie
    Given List<double> x1 = new List<double> { -0.2718, -0.2240, -0.1275, -0.0810, 0.0349, -0.5067, 0.0094, -0.4404, -0.1212 }; List<double> x2 = new List<double> { 0.0330, -0.6463, 0.1226, -0.3304, 0.4764, -0.4159, 0.4209, -0.4070, -0.2090 }; How can I make as double[][] X at runtime(programatically). I mean to say if the output I get if I run double[][] X = { new double[] { -0.2718, -0.2240, -0.1275, -0.0810, 0.0349, -0.5067, 0.0094, -0.4404, -0.1212 }, new double[] { 0.0330, -0.6463, 0.1226, -0.3304, 0.4764, -0.4159, 0.4209, -0.4070, -0.2090 } }; Using C#3.0 Thanks

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  • Change List Settings

    - by Carpentar
    Hello all, I wonder how would I go about doing this. I want to change a behavior for a list. When a list is added into sharepoint site, you can see 'Add New Item' underneath the list. When the user adds a new item, it should be replaced with 'Edit Item' How can I achieve this? Many thanks,

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  • List in C# - passing multiple entries as a single object

    - by Karthick
    Hi, I have a method (C#) public void MethodName(List<Order> Order, int ID) I need to pass this to a main page, in which i know to pass integer value to ID, am not able to pass multiple items in a single list. The List order should have two number entries, (ie. Order.number1 and Order.number2) How should i pass a single list as a parameter to this method containing multiple entries of number1 and 2, so that i can loop thro' and find it. Thanks.

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  • Removing words from a file

    - by user1765792
    I'm trying to take a regular text file and remove words identified in a separate file (stopwords) containing the words to be removed separated by carriage returns ("\n"). Right now I'm converting both files into lists so that the elements of each list can be compared. I got this function to work, but it doesn't remove all of the words I have specified in the stopwords file. Any help is greatly appreciated. def elimstops(file_str): #takes as input a string for the stopwords file location stop_f = open(file_str, 'r') stopw = stop_f.read() stopw = stopw.split('\n') text_file = open('sample.txt') #Opens the file whose stop words will be eliminated prime = text_file.read() prime = prime.split(' ') #Splits the string into a list separated by a space tot_str = "" #total string i = 0 while i < (len(stopw)): if stopw[i] in prime: prime.remove(stopw[i]) #removes the stopword from the text else: pass i += 1 # Creates a new string from the compilation of list elements # with the stop words removed for v in prime: tot_str = tot_str + str(v) + " " return tot_str

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  • sort list(of string()) using a variable index into string() as key - vb.net

    - by tullynyguy
    I have a List(of String()). I have written a custom comparer (implements IComparer(of string)) to do an alphanumeric sort. Is there a way to sort the List using a given index to determine which position in the String() to sort by? In other words one time I might sort by Index = 0 and another time by Index = 3. The length of all String() in the list is the same. For reference this question is similar to Sort List<String[]> except I am using VB.net and that question is hardwired to Index=0.

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  • Get groups of 4 elements from name value list using LINQ in C#

    - by Kodefoo
    I am wanting to loop through this list of name value pairs and grab them in groups of 4. The data would be like: value1 1 value2 1 value3 1 value4 1 value1 2 value2 2 value3 2 value4 2 and it would group it as 1 list that contains value1 1 value2 1 value3 1 value4 1 and another list that contains value1 2 value2 2 value3 2 value4 2 I know this can be done easily with a for loop, but I am wondering if there is a good way to do it with LINQ.

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  • Why can a List(Of SomeObject) not be converted to an IEnumerable(Of ISomeInterface) while SomeObject

    - by ropstah
    Please see the last comment in GetListChildren() function. "Why can a List(Of Page) not be converted to an IEnumerable(Of IListHasChildren) ?" Interface IListHasChildren Function GetListChildren() as IEnumerable(Of IListHasChildren) End Interface Public Class Page : Implements IListHasChildren Public Function GetChildren() As List(Of Page) //'return List(Of Page) with children End Function Public Function GetListChildren() : Implements IListHasChildren.GetListChildren Return Me.GetChildren() //'This cannot be converted to IEnumerable(Of IListHasChildren) ?? End Function End Class

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  • Moving an item up and down in a WPF list box

    - by DommyCastles
    I have a list box with a bunch of values in it. I also have an UP button and a DOWN button. With these buttons, I would like to move the selected item in the list box up/down. I am having trouble doing this. Here is my code so far: private void btnDataUp_Click(object sender, RoutedEventArgs e) { int selectedIndex = listBoxDatasetValues.SelectedIndex; //get the selected item in the data list if (selectedIndex != -1 && selectedIndex != 0) //if the selected item is selected and not at the top of the list { //swap items here listBoxDatasetValues.SelectedIndex = selectedIndex - 1; //keep the item selected } } I do not know how to swap the values! Any help would be GREATLY appreciated!

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  • How difficult is it for an artist to make their own artwork cohesive to another artists' style? [on hold]

    - by user36200
    I have a lot of artwork I purchased from a website, but the artist who drew the game assets is unavailable. I need to create additional artwork which fits with this style, but I am not an artist- nor do I have any idea of how artists work. Obviously, the solution is to find a new artist, who I can pay to draw this artwork while keeping it to look at certain way. I am scared of wasting money though. I don't want to contract an artist, only to find out it is extremely difficult for someone to match another person's art style. I don't need it to be identical, I just need it to be cohesive. I also want to know what I'm asking of people, before I ask them. Artists are workers just like me, and deserve to be understood when contracted. As an artist, is it extra difficult or time consuming to alter your artwork to match a certain style? Does it require a lot of talent to make a cohesive piece of art? To be specific, I am talking about structures, such as 2D symbols of towns for a map. They all have this "gritty" penciling effect to them and lots of saturated colors, which is what will be required when I say "cohesive". Along with looking like the architecture belongs in the same world.

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  • What is your "favorite" anti pattern?

    - by Omar Kooheji
    By favorite I mean the one that gets your goat the most, not the one you enjoy using the most. I'm fairly new to the concept of anti patterns and I'd like a list of do not do's. An explanation of why it's an antipattern and what problems it causes would be good too.

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  • PHP beautifiers (libraries for formatting code)

    - by takeshin
    Previously, my intention was to ask: Do you know any open source SQL formatter/beautifier library for PHP projects? But I think, I'd better ask: Which code formatting libraries written in PHP are the best? Let's list them all in one place. My types: for CSS syntax: Css Tidy for PHP: PEAR's PHP_Beautifier for HTML syntax: Tidy

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