recursion

问题 I am trying to represent a PDF object type in c++ using variants. A PDF object is one of the following: Boolean Integer Real String Name Stream Array<Object> Map<Object, Object> As you can see, the Object type is mutually recursive because the Array type would require a declaration of the Map type which would require a declaration of the Array type. How could I go abouts representing this type in c++? If a variant isn't the best way, what is? Here is what I have tried so far but it doesn't

问题 This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. Closed 7 years ago . I do not want to use while or for loops, just want to use recursion to return the odd numbers in a given list. Thanks! 回答1: def find_odds(numbers): if

问题 I'm very new to VBS and experimenting with removing the read only attribute from a directory recursively. It's removing the read only attribute for files but not for the directories. Also The files within these directories seem to have lost their associated program link and are now all showing as an unregistered file type. Any help is greatly appreciated. Update: I can see why the files have lost their associations now. It's because the . which separates the name from the extension has been

问题 Ex : Function Implementation: facto(x){ if(x==1){ return 1; } else{ return x*facto(x-1); } in more simple way lets take a stack --> returns |2(1)|----> 2(1) evaluates to 2 |3(2)|----> 3(2)<______________| evaluates to 6 |4(3)|----> 4(6)<______________| evaluates to 24 |5(4)|----> 5*(24)<____________| evaluates to 120 ------ finally back to main... when a function returns in reverse manner it never knows what exactly is behind it? The stack have activation records stored inside it but how they

问题 Code Design 1 : works perfectly public static void main (String[] args) { recursion(2); } public static void recursion(int num) { if (num > 0) { recursion( num - 1 ); System.out.println(num); } } Code Design 2 : Infinite Loop. ? public static void main (String[] args) { recursion(2); } public static void recursion(int num) { if (num == 0) return; while (num > 0) { recursion( num - 1 ); System.out.println(num); } } Can someone plz help me in understanding why 2nd design is getting into

问题 I'm not even certain what the title of this question should be - I'm not sure what is going wrong at all. I'm writing a function that simply loops through a binary tree. Let us say we have a simple tree such as: testTree = { data: 5, left: { data: 10, left: undefined, right: undefined }, right: { data: 2, left: undefined, right: undefined } } We're trying to collect the data from it, starting with going the left-most path. Here is the search left function: function searchLeft(node, path){ if

问题 I want to create a menu from Database and show in Menu Control. Code Here in .aspx page: <asp:Menu ID="Menu1" Orientation="horizontal" StaticMenuItemStyle-CssClass="menuItem" DynamicMenuItemStyle-CssClass="menuItem" runat="server"> In .cs Page of Master: protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { populateMenuItem(); } } private void populateMenuItem() { DataTable menuData = GetMenuData(); AddTopMenuItems(menuData); } /// Filter the data to get only the rows that

问题 Trying to display a hierarquical tree view with React.js My render method: render: function(){ var self= this; return( <div className="panel panel-flat content-group-lg"> <div className='panel-body'> <div className="tree"> <ul> <li> <a href="#">Categorias</a> { self.printTree(this.state.tree_array) } </li> </ul> </div> </div> </div> ) } and my printTree method: printTree: function(level){ console.log(level); var self = this; var level_length = level.length; if(level_length >= 1){ return( <ul>

问题 Trying to display a hierarquical tree view with React.js My render method: render: function(){ var self= this; return( <div className="panel panel-flat content-group-lg"> <div className='panel-body'> <div className="tree"> <ul> <li> <a href="#">Categorias</a> { self.printTree(this.state.tree_array) } </li> </ul> </div> </div> </div> ) } and my printTree method: printTree: function(level){ console.log(level); var self = this; var level_length = level.length; if(level_length >= 1){ return( <ul>

问题 I'd like break out of the below loop and return the best-min-move when line 10 evaluates to true. I've looked at the output with print statements and when line 10 does evaluate to true, it finds the data that I'm looking for but continues to recur. In Clojure is there a way to stop the loop when a statement evaluates to true? Or should I be using something other than a loop recur? (defn minimax [board max-mark min-mark depth best-score] (loop [board board max-mark max-mark min-mark min-mark