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  • Reset array keys in multidimensional array

    - by nbaumann
    I've been looking around for a solution to this with no real success. I have a multidimensional array of parents and children with no limits on depth. This is generated from a database but the issue is that the item ID becomes the key using my way of arranging a flat array into a multidimensional array like so: Array( [28] => Array ( [id] => 28 [color] => #ff24e5 [name] => Personal [parent_id] => [children] => Array ( [23] => Array ( [id] => 23 [color] => #41c3a3 [name] => Shopping [parent_id] => 28 [children] => Array ( [22] => Array ( [id] => 22 [color] => #8be32b [name] => Deals [parent_id] => 23 [children] => Array ( ) ) ) ) [150] => Array ( [id] => 150 [color] => #e9a3f0 [name] => Orders [parent_id] => 28 [children] => Array ( ) ) ) ) ) What I would like, is a function that does the following: Array ( [0] => Array ( [id] => 28 [color] => #ff24e5 [name] => Personal [parent_id] => [children] => Array ( [0] => Array ( [id] => 23 [color] => #41c3a3 [name] => Shopping [parent_id] => 28 [children] => Array ( [0] => Array ( [id] => 22 [color] => #8be32b [name] => Deals [user_id] => 1 [selected] => 0 [parent_id] => 23 [children] => Array ( ) ) ) ) [1] => Array ( [id] => 150 [color] => #e9a3f0 [name] => Orders [parent_id] => 28 [children] => Array ( ) ) ) ) ) Essentially reassign keys starting from 0. I've tried numerous methods, but I'm assuming that I need to find a recursive solution and when I tried that, it destroyed my array. I was reading up on the array_walk_recursive() function, but I don't quite know what to do beyond that. Essentially, is there a way to reset numeric keys in a multidimensional array? Thanks for the help!

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  • Release Candidates of Application Initialization and Dynamic IP Restrictions Released

    - by The Official Microsoft IIS Site
    Two new Release Candidates for the following IIS Extensions have been released today: Application Initialization for IIS 7.5 (the replacement for the previously released Application Warmup beta extension) Dynamic IP Restrictions for IIS7/7.5 Application Initialization for IIS 7.5 Application Initialization is a feature which is coming in IIS 8.0 and is now also available for IIS 7.5 (please note this feature is not available for IIS 7.0).   This module helps to eliminate the lack of feedback...(read more)

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  • How to structurally display a multi-dimensional array in PHP?

    - by Jaime Cross
    How can I display the contents of an array as follows: Company Name - Username1 - Username2 Another Company Name - Username3 The array I have created is as follows: $array[1]['company_id'] = '12'; $array[1]['company_name'] = 'ABC Company'; $array[1]['company_type'] = 'default'; $array[1]['user_id'] = '23'; $array[1]['user_name'] = 'Andrew'; $array[2]['company_id'] = '12'; $array[2]['company_name'] = 'ABC Company'; $array[2]['company_type'] = 'default'; $array[2]['user_id'] = '27'; $array[2]['user_name'] = 'Jeffrey'; $array[3]['company_id'] = '1'; $array[3]['company_name'] = 'Some Company'; $array[3]['company_type'] = 'default'; $array[3]['user_id'] = '29'; $array[3]['user_name'] = 'William'; $array[4]['company_id'] = '51'; $array[4]['company_name'] = 'My Company'; $array[4]['company_type'] = 'default'; $array[4]['user_id'] = '20'; $array[4]['user_name'] = 'Jaime';

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  • Dynamic Array traversal in PHP

    - by Kristoffer Bohmann
    I want to build a hierarchy from a one-dimensional array and can (almost) do so with a more or less hardcoded code. How can I make the code dynamic? Perhaps with while(isset($array[$key])) { ... }? Or, with an extra function? Like this: $out = my_extra_traverse_function($array,$key); function array_traverse($array,$key=NULL) { $out = (string) $key; $out = $array[$key] . "/" . $out; $key = $array[$key]; $out = $array[$key] ? $array[$key] . "/" . $out : ""; $key = $array[$key]; $out = $array[$key] ? $array[$key] . "/" . $out : ""; $key = $array[$key]; $out = $array[$key] ? $array[$key] . "/" . $out : ""; return $out; } $a = Array(102=>101, 103=>102, 105=>107, 109=>105, 111=>109, 104=>111); echo array_traverse($a,104); Output: 107/105/109/111/104

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  • PHP arrays - How to 1-dimensional array into nested multidimensional array?

    - by sombe
    When retrieving a hierarchical structure from MySQL (table with one ID column and one PARENT column signifying the hierarchical relationships), I map the result into an enumerated array as follows (for this example the numbers are arbitrary): Array ( [3] => Array ( [7] => Array () ), [7] => Array ( [8] => Array () ) ) Notice 3 is the parent of 7, and 7 is the parent of 8 (this could go on and on; and any parent could have multiple children). I wanted to shrink this array into a nested multidimensional array as follows: Array ( [3] => Array ( [7] => Array ( [8] => Array () ) ) ) That is, each NEW id is automatically assigned an empty array. Regardless, any ID's children will be pushed into their parent's array. Take a look at the following illustration for further clarification: This will probably result in a complicated recursive operation, since I always have to check whether a parent with any certain ID already exists (and if so, push the value into its array). Is there a built-in php function that can assist me with this? Do you have any idea as to how to go about constructing this? For what it's worth I'm using this to built a navigation bar in wordpress (which can contain categories, subcategories, posts... essentially anything).

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  • Casting Type array to Generic array?

    - by George R
    The short version of the question - why can't I do this? I'm restricted to .NET 3.5. T[] genericArray; // Obviously T should be float! genericArray = new T[3]{ 1.0f, 2.0f, 0.0f }; // Can't do this either, why the hell not genericArray = new float[3]{ 1.0f, 2.0f, 0.0f }; Longer version - I'm working with the Unity engine here, although that's not important. What is - I'm trying to throw conversion between its fixed Vector2 (2 floats) and Vector3 (3 floats) and my generic Vector< class. I can't cast types directly to a generic array. using UnityEngine; public struct Vector { private readonly T[] _axes; #region Constructors public Vector(int axisCount) { this._axes = new T[axisCount]; } public Vector(T x, T y) { this._axes = new T[2] { x, y }; } public Vector(T x, T y, T z) { this._axes = new T[3]{x, y, z}; } public Vector(Vector2 vector2) { // This doesn't work this._axes = new T[2] { vector2.x, vector2.y }; } public Vector(Vector3 vector3) { // Nor does this this._axes = new T[3] { vector3.x, vector3.y, vector3.z }; } #endregion #region Properties public T this[int i] { get { return _axes[i]; } set { _axes[i] = value; } } public T X { get { return _axes[0];} set { _axes[0] = value; } } public T Y { get { return _axes[1]; } set { _axes[1] = value; } } public T Z { get { return this._axes.Length (Vector2 vector2) { Vector vector = new Vector(vector2); return vector; } public static explicit operator Vector(Vector3 vector3) { Vector vector = new Vector(vector3); return vector; } #endregion }

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  • C++ Suppress Automatic Initialization and Destruction

    - by Travis G
    How does one suppress the automatic initialization and destruction of a type? While it is wonderful that T buffer[100] automatically initializes all the elements of buffer, and destroys them when they fall out of scope, this is not the behavior I want. #include <iostream> static int created = 0, destroyed = 0; struct S { S() { ++created; } ~S() { ++destroyed; } }; template <typename T, size_t KCount> class Array { private: T m_buffer[KCount]; public: Array() { // some way to suppress the automatic initialization of m_buffer } ~Array() { // some way to suppress the automatic destruction of m_buffer } }; int main() { { Array<S, 100> arr; } std::cout << "Created:\t" << created << std::endl; std::cout << "Destroyed:\t" << destroyed << std::endl; return 0; } The output of this program is: Created: 100 Destroyed: 100 I would like it to be: Created: 0 Destroyed: 0 My only idea is to make m_buffer some trivially constructed and destructed type like char and then rely on operator[] to wrap the pointer math for me, although this seems like a horribly hacked solution. Another solution would be to use malloc and free, but that gives a level of indirection that I do not want.

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  • Understanding c-pointers for rows in 2-dimensional array

    - by utdiscant
    I have the following code: int main() { int n = 3, m = 4, a[n][m], i, j, (* p)[m] = a; for (i = 0; i < n; i++) for (j = 0; j < m; j++) a[i][j] = 1; p++; (*p)[2] = 9; return 0; } I have a hard time understanding what p is here, and the consequences of the operations on p in the end. Can someone give me a brief explanation of what happens. I know c-pointers in their simple settings, but here it get slightly more complicated.

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  • Methods for Lazy Initialization with properties

    - by Stuart Pegg
    I'm currently altering a widely used class to move as much of the expensive initialization from the class constructor into Lazy Initialized properties. Below is an example (in c#): Before: public class ClassA { public readonly ClassB B; public void ClassA() { B = new ClassB(); } } After: public class ClassA { private ClassB _b; public ClassB B { get { if (_b == null) { _b = new ClassB(); } return _b; } } } There are a fair few more of these properties in the class I'm altering, and some are not used in certain contexts (hence the Laziness), but if they are used they're likely to be called repeatedly. Unfortunately, the properties are often also used inside the class. This means there is a potential for the private variable (_b) to be used directly by a method without it being initialized. Is there a way to make only the public property (B) available inside the class, or even an alternative method with the same initialized-when-needed? This is reposted from Programmers (not subjective enough apparently): http://programmers.stackexchange.com/questions/34270/best-methods-for-lazy-initialization-with-properties

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  • Preferred way of application initialization

    - by lisak
    Do you guys have your own little framework for project startups ? I mean, every time one needs to do the same things at the beginning: Context initialization - ideally after arguments are processed. Sometimes without interactive user input, sometimes with input reader. Sometimes we need to load properties, sometimes not. Then we need to get a class out of context and run its method. Programming....programming until writing shell script to place everything on classpath. It's true that it differs according to the actual needs. But it seems to me, that I'm doing always almost the same, again and again from the scratch. Sometimes I realize that I'm postponing my work just because I don't want to do these annoying startups. It would be great if there was some kind of universal Main class doing reflection to specified bean, context initialization, argument parsing, interactive user input reading and have the programmer do the important things...All setup might be done via spring configuration. I think I'll have to do it by myself. I'd appreciate your ideas

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  • Thread-safe initialization of function-local static const objects

    - by sbi
    This question made me question a practice I had been following for years. For thread-safe initialization of function-local static const objects I protect the actual construction of the object, but not the initialization of the function-local reference referring to it. Something like this: namspace { const some_type& create_const_thingy() { lock my_lock(some_mutex); static const some_type the_const_thingy; return the_const_thingy; } } void use_const_thingy() { static const some_type& the_const_thingy = create_const_thingy(); // use the_const_thingy } The idea is that locking takes time, and if the reference is overwritten by several threads, it won't matter. I'd be interested if this is safe enough in practice? safe according to The Rules? (I know, the current standard doesn't even know what "concurrency" is, but what about trampling over an already initialized reference? And do other standards, like POSIX, have something to say that's relevant to this?) For the inquiring minds: Many such function-local static const objects I used are maps which are initialized from const arrays upon first use and used for lookup. For example, I have a few XML parsers where tag name strings are mapped to enum values, so I could later switch over the tags enum values.

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  • How to define a static array without a contant size in a constructor of a class? (C++)

    - by Keand64
    I have a class defined as: class Obj { public: int width, height; Obj(int w, int h); } and I need it to contain a static array like so: int presc[width][height]; however, I cannot define within the class, so it it possible to create a pointer to a 2D array (and, out of curiosity, 3, 4, and 5D arrays), have that as a member of the class, and intitalize it in the constructor like: int ar[5][6]; Obj o(5, 6, &ar); If that isn't possible, is there any way to get a static array without a contant size in a class, or am I going to have to use a dynamic array? (Something I don't want to do because I don't plan on ever changing the size of the array after it's created.)

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  • How to remove duplicates from multidimensional array in php

    - by JackTurky
    i have an array like: Array ( [prom] => Array ( [cab] => Array ( [0] => Array ( [code] => 01 [price1] => 1000 [price2] => 2000 [available] => 2 [max] => 2 [gca] => 2 ) [1] => Array ( [code] => 04 [price1] => 870 [price2] => 2500 [available] => 3 [max] => 4 [gca] => 10 ) [2] => Array ( [code] => 01 [price1] => 1000 [price2] => 2000 [available] => 2 [max] => 2 [gca] => 2 ) [3] => Array ( [code] => 05 [price1] => 346 [price2] => 1022 [available] => 10 [max] => 2 [gca] => 20 ) ) [cab1] => Array........ ) [prom1] = Array.... ) What i have to do is to remove duplicates inside every [cab*] array.. so to have something like: Array ( [prom] => Array ( [cab] => Array ( [0] => Array ( [code] => 01 [price1] => 1000 [price2] => 2000 [available] => 2 [max] => 2 [gca] => 2 ) [1] => Array ( [code] => 04 [price1] => 870 [price2] => 2500 [available] => 3 [max] => 4 [gca] => 10 ) [2] => Array ( [code] => 05 [price1] => 346 [price2] => 1022 [available] => 10 [max] => 2 [gca] => 20 ) ) [cab1] => Array........ ) [prom1] = Array.... ) In know that there is array_unique combined with array_map to remove duplicates.. but i know that it works only on 2D array.. what can i do? can someone help me pls? thanks!!!

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  • Sum Values in Multidimensional Array

    - by lemonpole
    Hello all. I'm experimenting with arrays in PHP and I am setting up a fake environment where a "team's" record is held in arrays. $t1 = array ( "basicInfo" => array ( "The Sineps", "December 25, 2010", "lemonpole" ), "overallRecord" => array ( 0, 0, 0, 0 ), "overallSeasons" => array ( "season1.cs" => array (0, 0, 0), "season2.cs" => array (0, 0, 0) ), "matches" => array ( "season1.cs" => array ( "week1" => array ("12", "3", "1"), "week2" => array ("8", "8" ,"0"), "week3" => array ("8", "8" ,"0") ), "season2.cs" => array ( "week1" => array ("9", "2", "5"), "week2" => array ("12", "2" ,"2") ) ) ); What I am trying to achieve is to add all the wins, loss, and draws, from each season's week to their respective week. So for example, the sum of all the weeks in $t1["matches"]["season1.cs"] will be added to $t1["overallSeasons"]["season1.cs"]. The result would leave: "overallSeasons" => array ( "season1.cs" => array (28, 19, 1), "season2.cs" => array (21, 4, 7) ), I tried to work this out on my own for the past hour and all I have gotten is a little more knowledge of for-loops and foreach-loops :o... so I think I now have the basics down such as using foreach loops and so on; however, I am still fairly new to this so bear with me! I can get the loop to point to $t1["matches"] key and go through each season but I can't seem to figure out how to add all of the wins, loss, and draw, for each individual week. For now, I'm only looking for answers concerning the overall seasons sum since I can work from there once I figure out how to achieve this. Any help will be much appreciated but please, try and keep it simple for me... or comment the code accordingly please! Thanks!

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  • boost.serialization and lazy initialization

    - by niXman
    i need to serialize directory tree. i have no trouble with this type: std::map< std::string, // string(path name) std::vector<std::string> // string array(file names in the path) > tree; but for the serialization the directory tree with the content i need other type: std::map< std::string, // string(path name) std::vector< // files array std::pair< std::string, // file name std::vector< // array of file pieces std::pair< // <<<<<<<<<<<<<<<<<<<<<< for this i need lazy initialization std::string, // piece buf boost::uint32_t // crc32 summ on piece > > > > > tree; how can i serialize the object of type "std::pair" in the moment of its serialization?

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  • Odd ActiveRecord model dynamic initialization bug in production

    - by qfinder
    I've got an ActiveRecord (2.3.5) model that occasionally exhibits incorrect behavior that appears to be related to a problem in its dynamic initialization. Here's the code: class Widget < ActiveRecord::Base extend ActiveSupport::Memoizable serialize :settings VALID_SETTINGS = %w(show_on_sale show_upcoming show_current show_past) VALID_SETTINGS.each do |setting| class_eval %{ def #{setting}=(val); self.settings[:#{setting}] = (val == "1"); end def #{setting}; self.settings[:#{setting}]; end } end def initialize_settings self.settings ||= { :show_on_sale => true, :show_upcoming => true } end after_initialize :initialize_settings # All the other stuff the model does end The idea was to use a single record field (settings) to persist a bunch of configuration data for this object, but allow all the settings to seamlessly work with form helpers and the like. (Why this approach makes sense here is a little out of scope, but let's assume that it does.) Net-net, Widget should end up with instance methods (eg #show_on_sale= #show_on_sale) for all the entires in the VALID_SETTINGS array. Any default values should be specified in initialize_settings. And indeed this works, mostly. In dev and staging, no problems at all. But in production, the app sometimes ends up in a state where a) any writes to the dynamically generated setters fail and b) none of the default values appear to be set - although my leading theory is that the dynamically generated reader methods are just broken. The code, db, and environment is otherwise identical between the three. A typical error message / backtrace on the fail looks like: IndexError: index 141145 out of string (eval):2:in []=' (eval):2:inshow_on_sale=' [GEM_ROOT]/gems/activerecord-2.3.5/lib/active_record/base.rb:2746:in send' [GEM_ROOT]/gems/activerecord-2.3.5/lib/active_record/base.rb:2746:inattributes=' [GEM_ROOT]/gems/activerecord-2.3.5/lib/active_record/base.rb:2742:in each' [GEM_ROOT]/gems/activerecord-2.3.5/lib/active_record/base.rb:2742:inattributes=' [GEM_ROOT]/gems/activerecord-2.3.5/lib/active_record/base.rb:2634:in `update_attributes!' ...(then controller and all the way down) Ideas or theories as to what might be going on? My leading theory is that something is going wrong in instance initialization wherein the class instance variable settings is ending up as a string rather than a hash. This explains both the above setter failure (:show_on_sale is being used to index into the string) and the fact that getters don't work (an out of bounds [] call on a string just returns nil). But then how and why might settings occasionally end up as a string rather than hash?

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  • Specific complex array sorting

    - by TheDeadMedic
    Okay, a before; Array ( 'home' => array('order' => 1), 'about' => array(), 'folio' => array('order' => 2), 'folio/web' => array('order' => 2), 'folio/print' => array('order' => 1) 'contact' => array('order' => 2) ) And a desired after; Array ( 'home' => array('order' => 1), 'contact' => array('order' => 2), 'folio' => array('order' => 2), 'folio/print' => array('order' => 1), 'folio/web' => array('order' => 2), 'about' => array() ) I know, horrific (don't ask!) See how the slash in the key indicates children, and how the order is nested accordingly? And items without orders are simply shifted to the bottom. But also how multiple 'same level' items with the same order are merely sorted by key?

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  • PHP: Recursive array function

    - by Industrial
    Hi everybody, I want to create a function that returns the full path from a set node, back to the root value. I tried to make a recursive function, but ran out of luck totally. What would be an appropriate way to do this? I assume that a recursive function is the only way? Here's the array: Array ( [0] => Array ( [id] => 1 [name] => Root category [_parent] => ) [1] => Array ( [id] => 2 [name] => Category 2 [_parent] => 1 ) [2] => Array ( [id] => 3 [name] => Category 3 [_parent] => 1 ) [3] => Array ( [id] => 4 [name] => Category 4 [_parent] => 3 ) ) The result I want my function to output when getting full path of node id#4: Array ( [0] => Array ( [id] => 1 [name] => Root category [_parent] => ) [1] => Array ( [id] => 3 [name] => Category 3 [_parent] => 1 ) [2] => Array ( [id] => 4 [name] => Category 4 [_parent] => 3 ) ) The notoriously bad example of my recursive skills: function recursive ($id, $array) { $innerarray = array(); foreach ($array as $k => $v) { if ($v['id'] === $id) { if ($v['_parent'] !== '') { $innerarray[] = $v; recursive($v['id'], $array); } } } return $innerarray; } Thanks!

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  • Convert PostgreSQL array to PHP array

    - by EarthMind
    I have trouble reading Postgresql arrays in PHP. I have tried explode(), but this breaks arrays containing commas in strings, and str_getcsv() but it's also no good as PostgreSQL doesn't quote the Japanese strings. Not working: explode(',', trim($pgArray, '{}')); str_getcsv( trim($pgArray, '{}') );

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  • Convert between python array and .NET Array

    - by dungema
    I have a python method that returns a Python byte array.array('c'). Now, I want to copy this array using System.Runtime.InteropServices.Marshal.Copy. This method however expects a .NET array. import array from System.Runtime.InteropServices import Marshal bytes = array.array('c') bytes.append('a') bytes.append('b') bytes.append('c') Marshal.Copy(bytes, dest, 0, 3) Is there a way to make this work without copying the data? If not, how do I convert the data in the Python array to the .NET array?

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  • Formatting associative array declaration

    - by Drew Stephens
    When declaring an associative array, how do you handle the indentation of the elements of the array? I've seen a number of different styles (PHP syntax, since that's what I've been in lately). This is a pretty picky and trivial thing, so move along if you're interested in more serious pursuits. 1) Indent elements one more level: $array = array( 'Foo' => 'Bar', 'Baz' => 'Qux' ); 2) Indent elements two levels: $array = array( 'Foo' => 'Bar', 'Baz' => 'Qux' ); 3) Indent elements beyond the array constructor, with closing brace aligned with the start of the constructor: $array = array( 'Foo' => 'Bar', 'Baz' => 'Qux' ); 4) Indent elements beyond the array construct, with closing brace aligned with opening brace: $array = array( 'Foo' => 'Bar', 'Baz' => 'Qux' ); Personally, I like #3—the broad indentation makes it clear that we're at a break point in the code (constructing the array), and having the closing brace floating a bit to the left of all of the array's data makes it clear that this declaration is done.

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  • Javascript array length incorrect on array of objects

    - by Serenti
    Could someone explain this (strange) behavior? Why is the length in the first example 3 and not 2, and most importantly, why is the length in the second example 0? As long as the keys are numerical, length works. When they are not, length is 0. How can I get the correct length from the second example? Thank you. a = []; a["1"] = {"string1":"string","string2":"string"}; a["2"] = {"string1":"string","string2":"string"}; alert(a.length); // returns 3 b = []; b["key1"] = {"string1":"string","string2":"string"}; b["key2"] = {"string1":"string","string2":"string"}; alert(b.length); // returns 0

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