recursion

问题 I'm trying to traverse a tree of nested of items using async.js. The traversal terminates after going through just one branch. var count=0; exports.buildFamily = function(item_id, mback){ var extendedFamily={}; exports.getItembyId(item_id, function(err, item){ extendedFamily=item; if(item.descendants){ extendedFamily.kids=[]; count=+item.descendants.length; console.log('outercount ' + count); async.eachSeries(item.descendants, function(item){ count-- console.log('item: ' + item) exports

问题 I would like to create a recursive view in Teradata (i.e., CREATE RECURSIVE VIEW ) from the following reproducible example: CREATE VOLATILE TABLE vt1 ( foo VARCHAR(10) , counter INTEGER , bar INTEGER ) ON COMMIT PRESERVE ROWS; INSERT INTO vt1 VALUES ('a', 1, '1'); INSERT INTO vt1 VALUES ('a', 2, '2'); INSERT INTO vt1 VALUES ('a', 3, '2'); INSERT INTO vt1 VALUES ('a', 4, '4'); INSERT INTO vt1 VALUES ('a', 5, '1'); INSERT INTO vt1 VALUES ('b', 1, '3'); INSERT INTO vt1 VALUES ('b', 2, '1');

问题 This question already has answers here : Variadic curried sum function (12 answers) Closed 3 years ago . This was an interview question which I haven't yet been able to figure out. Consider the following: function recurse(a) { return function(b) { console.log(a + b); } } //This will log '5' in the console recurse(2)(3); Now I was asked to write a function that will take n number of arguments and work the same way by logging the final summation of the argument values. Meaning: //This should

问题 Given two lists, return a list whose elements are lists of size two, such that for the i -th list, the first element is the i -th element of the first original list, and the second element is the i -th element of the second original list. If one list is smaller than the other, the resulting list is of the smallest size; and so if one of the lists is empty, return an empty list. For example: > (zip '(1 2) '(3 4)) '((1 3) (2 4)) > (zip '(1 2 3) '()) '() > (zip '() '(4 5 6)) '() > (zip '(8 9) '

问题 I was trying to rewrite the Factorial implementation using constexpr function but for some reason I have no idea why I get a compile error: recursive template instantiation exceeded maximum depth of 256 Actually I know what the error message means but what I don't is why I'm getting this error and why the code 1 using struct work but the second using function doesn't. What's the difference between them? // yes, I know it doesn't return the factorial value. First I want to make it compile

问题 After calling method, node.nth(5) in below code, public class List_Node { int item; List_Node next; public List_Node() { this.item = 0; this.next = null; } public List_Node(int item, List_Node next) { this.item = item; this.next = next; } public List_Node(int item) { this(item, null); } public void insertAfter(int item) { this.next = new List_Node(item, this.next); } public List_Node nth(int position) { if (position == 1) { return this; } else if((position < 1) || (this.next == null)) { /*

问题 Iam trying to encrypt only the key value of json object using nodejs app.Iam using crypto node module.I will pass json object(it can be basic or complexi.e.,inside a value we can again have key value pair) then as response we should get the same json in same format which we give initially,but the key value should be enctyped. In my code I have an encrypt function which will encrypt the data.Here I should only pass the keyvalue to the function,which iam able to do and get back encrypted data

问题 This question already has an answer here : How do a python recursive function works for tri_recursion function (1 answer) Closed last year . So I found this example of recursion in Python on W3 Schools, but am having trouble wrapping my head around it. def tri_recursion(k): if(k>0): result = k+tri_recursion(k-1) print(result) else: result = 0 return result print("\n\nRecursion Example Results") tri_recursion(6) The way I am reading it, with an initial input of 6, the first print of result

问题 Can someone please explain to me how recursion works in in Order traversal. here's my inOrder() method. public void inOrder(BinaryNode p){ if(p.left!=null){ inOrder(p.left); } visit(p); if(p.right!=null){ inOrder(p.right); } } public void visit(BinaryNode p){ System.out.println(p.element); } BinaryTree t=new BinaryTree(); t.insert(5); t.insert(t.root,4); t.insert(t.root,6); t.insert(t.root,60); t.insert(t.root,25); t.insert(t.root,10); t.inOrder(t.root); The method inOrder() prints the

问题 Can someone please explain to me how recursion works in in Order traversal. here's my inOrder() method. public void inOrder(BinaryNode p){ if(p.left!=null){ inOrder(p.left); } visit(p); if(p.right!=null){ inOrder(p.right); } } public void visit(BinaryNode p){ System.out.println(p.element); } BinaryTree t=new BinaryTree(); t.insert(5); t.insert(t.root,4); t.insert(t.root,6); t.insert(t.root,60); t.insert(t.root,25); t.insert(t.root,10); t.inOrder(t.root); The method inOrder() prints the