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• how can I code a recursive query in an Entity Framework model?

  - by Greg

  Hi, I have a model which includes NODES, and RELATIONSHIPS (that tie the nodes together, via a parent_node, child_node arrangement). Q1 - Is there any way in EF / Linq-to-entities to perform a query on nodes (e.g. context.Nodes..) to find say "all parents" or "or children" in the graph? Q2 - If there's not in Linq-to-entities, is there any…

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• What is the best way to translate this recursive python method into Java?

  - by Simucal

  In another question I was provided with a great answer involving generating certain sets for the Chinese Postman Problem. The answer provided was: def get_pairs(s): if not s: yield [] else: i = min(s) for j in s - set([i]): for r in get_pairs(s - set([i, j])): yield [(i, j)] + r for x in…

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• Does a recursive Ant task exist to recover properties from external file?

  - by Julia2020

  Hi, I ve got a problem in getting properties with ant from a properties file. With a simple target like this in my build.xml, i'd like to get at least two properties path1 and path2. I'd like to have a generic target to get this two properties.... in order to avoid modifying the build.xml (just adding a new prop) Any suggestions?…

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• Recursive multiline sed - remove beginning of file until pattern match.

  - by yaya3

  I have nested subdirectories containing html files. For each of these html files I want to delete from the top of the file until the pattern <div id="left- This is my attempt from osx's terminal: find . -name "*.html" -exec sed "s/.*?<div id=\"left-col/<div id=\"left-col/g" '{}' \; I get a lot of html output in the…

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• iPhone - Is it possible to override silent mode or have a recursive alert sound with push notificati

  - by Wallace

  Hi, I'm trying to write an application for the iphone where the user will be notified of events such as deadlines. I am looking to override the silent mode and possibly have the notification sound loop until the user activates the application. Any info or documentation would be appreciated. Thanks.

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• Javascript getelementbyid lookups - hash map or recursive tree traversal?

  - by sash

  Does the DOM have a hashtable of elements whose keys are the elements' ids? I want to know if document.getelementbyid() looks up a hash table or traverses the entire tree. Is this behavior different across browsers?

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• What is wrong with this recursive Windows CMD script? It won't do Ackermann properly

  - by boost

  I've got this code that I'm trying to get to calculate the Ackermann function so that I can post it up on RosettaCode. It almost works. I thought maybe there'd be a few batch file wizards on StackOverflow. ::echo off set depth=0 :ack if %1==0 goto m0 if %2==0 goto n0 :else set /a n=%2-1 set /a depth+=1 call :ack %1 %n% set…

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• How do you make this Haskell power function tail recursive?

  - by Linda Cohen

  turboPower a 0 = 1 turboPower a b | even b = turboPower (a*a) (b `div` 2) | otherwise = a * turboPower a (b-1) THANKS!

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• Does PHPUnit have some inbuilt recursive array comparison function?

  - by Ben Dauphinee

  Some of the testing I will need to do will require comparing a known array with the result I am getting from the functions I will be running. For comparing arrays recursively: Does PHPUnit have an inbuilt function? Does someone here have some code they have constructed to share? Will this be something I will have to…

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• How can I perform an idiomatic non-recursive flatten in ruby?

  - by nasmorn

  I have a method that returns an array of arrays. For convenience I use collect on a collection to gather them together. arr = collection.collect {|item| item.get_array_of_arrays} Now I would like to have a single array that contains all the arrays. Of course I can loop over the array and use the + operator to do that.…

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• Where should I initialize variables for an OO Recursive Descent Parse Tree?

  - by Vasto

  I'd like to preface this by stating that this is for a class, so please don't solve this for me. One of my labs for my cse class is creating an interpreter for a BNF that was provided. I understand most of the concepts, but I'm trying to build up my tree and I'm unsure where to initialize values. I've tried in both the…

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• Elegant way for a recursive C++ template to do something different with the leaf class?

  - by Costas

  I have a C++ class template that makes an Array of pointers. This also gets typedefed to make Arrays of Arrays and so on: typedef Array<Elem> ElemArray; typedef Array<ElemArray> ElemArrayArray; typedef Array<ElemArrayArray> ElemArrayArrayArray; I would like to be able to set one leaf…

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• Java: Combination of recursive loops which has different FOR loop inside; Output: FOR loops indexes

  - by vvinjj

  currently recursion is fresh & difficult topic for me, however I need to use it in one of my algorithms. Here is the challenge: I need a method where I specify number of recursions (number of nested FOR loops) and number of iterations for each FOR loop. The result should show me, something simmilar to counter,…

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• Looking for an example of a typical tree-recursion turned into a tail-recursive form.

  - by Skeptic

  Anything like flatten, count-atoms, etc. over nested lists would do fine. BTW, I'm not interested in a CPS transformation or "pairs-trees".

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• How to generate a <ul><li> tree without recursive using python or other language ??

  - by user210221

  class tree: def __init__(self, name='a', childs=[]): self.name = name self.childs = childs output: <ul> <li> Introduction <ul> <li>Sub Intro</li> </ul> </li> <li>Module 1</li> </ul> Sorry, my English…

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• This recursive function puzzles me, what is going on?

  - by Fred

  I was playing around with recursion and did this simple function. I was assuming that it would print out 9-0 to stdout, but, it prints 0-9. I can't see how that happens at all. int main() { rec(10); return 0; } int rec(int n){ if(n > 0) printf("%d\n", rec(n -1)); …

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• PCRE (recursive) pattern that matches a string containing a correctly parenthesized substring. Why d

  - by Anton N. Petrov

  Well, there are other ways (hmmm... or rather working ways) to do it, but the question is why does this one fail? / \A # start of the string ( # group 1 (?: # group 2 [^()]* # something other than parentheses (greedy) | # or \( (?1) \) #…

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• How to handle recursive parent/child problems like this?

  - by lsdude

  In web dev I come across these problems a lot. For example, we have a giant list of URLs that are in this format: /businesses /businesses/food /businesses/food/wendys /businesses/food/wendys/chili /businesses/food/wendys/fries /businesses/food/wendys/chicken-nuggets …

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• Returning a list in this recursive coi function in python.

  - by Nate

  Hello. I'm having trouble getting my list to return in my code. Instead of returning the list, it keeps returning None, but if I replace the return with print in the elif statement, it prints the list just fine. How can I repair this? def makeChange2(amount, coinDenomination,…

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• Can somebody please explain this recursive function for me?

  - by capncoolio

  #include <stdio.h> #include <stdlib.h> void reprint(char *a[]) { if(*a) { printf("%d ",a); reprint(a+1); printf("%s ",*a); } } int main() { char *coll[] = {"C", "Objective", "like", "don't", "I", NULL}; …

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• How do I make a recursive list that checks company rankings?

  - by Sera

  I have a set of companies in rank order. I want my rule to check if the companies in a specified list are in rank order, and for the rule to recur until all companies in the list have been checked. I currently have the following: isOrder([]).…

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• How to make a recursive onClickListener for expanding and collapsing?

  - by hunterp

  In plain english, I have a textview, and when I click on it I want it to expand, and when I click on it again, I want it to compress. How can I do this? I've tried the below, but it warns on the final line about expander might not be initialized on…

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• Why can't i define recursive variable in code block?

  - by senia

  Why can't i define a variable recursively in a code block? scala> { | val fibs: Stream[Int] = 1 #:: fibs.scanLeft(1){_ + _} | } <console>:9: error: forward reference extends over definition of value fibs val fibs:…

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• prolog. recursive function returning multiple values.

  - by obtur

  I am new in Prolog. I need to declare a function which looks at a list like [[1, 0, 0], [1, 0, 0], [1, 0, 0]] and if the value is 0 returns its address(by considering it as a double array). I wrote a function basicly in the format: function(...,…

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• Is it good to create a usercontrol for Recursive code in xaml?

  - by user281947

  <Border BorderBrush="#C4C8CC" BorderThickness="0,0,0,1"> <TextBlock x:Name="SectionTitle" FontFamily="Trebuchet MS" FontSize="14" FontWeight="Bold" Foreground="#3D3D3D" /> </Border> I have to use the same above…

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