Advertisements I didn’t know where to post this question, but stackoverflow has been helpful before, so I am going to post my question here. This question is related to Leetcode problem number 100 (Same Tree) and my question is "how do TreeNode" actually work? class TreeNode: def __init__(self, val=0, left=None, right=None): self.val = val self.left… Read More Leetcode problem 100, understanding TreeNode
Advertisements I am new to MySQL and can’t find the right answer so im hoping you guys can help me out. I have 3 tables. Applications (columns: appli_num (PK), appli_title) Modules (columns: appli_num (PK), modu_num (PK), modu_title) and modules is a child from applications Data_fields (columns: appli_num (PK), modu_num (PK), data_num(PK), data_title) and data_fields is… Read More How to create JSON column with parent and multiple childs and grandchilds
Advertisements I have been learning tree data structure for a while. I tried to implement tree using templates. I came up with an error while calling some function for input. This is the fragment where I am getting error. template <typename T> class Tree{ public: T data; vector<Tree<T>*>children; Tree(T data){ this->data=data; } }; template <typename… Read More Couldn't deduce template parameter while using dynamic object created with specified typename
Advertisements In the following code, I have a function extractWords which given a simple trie data structure should return a list of words. I am currently using a recursion (even another way is acceptable) to try to get the words. The ‘*’: null, reppresents the end of the word in the trie. Current result is… Read More Print all words in a Trie data structure
Advertisements As we all know, if you have a function like this: def foo(): foo() The function will call itself 1000 times and then you get a RecursionError exception. But what if you had a thousand and one different functions that call each other? i.e. a() calls b() calls c() and so on. Would you… Read More Are there separate call tree depths for recursive and non-recursive calls?
Advertisements I have a tree-based javascript object. let tree = { id: 1, children: [ {id: 2}, {id: 3}, { id: 4, children: [ {id: 5}, {id: 6}, { id: 7, children: [ {id: 8}, {id: 9}, {id: 10,} ] } ] } ] } So, im trying to get all of them as a… Read More Getting all the children of a tree javascript object as a flat array
Advertisements I’m building a tree feature for my app. My tree has infinite level. I’m using this functions to build my tree (you can try my code here https://onlinephp.io/c/a50bc): function build(array $array): array { if (count($array) <= 0) { return [ ‘leaf_ids’ => [], ‘parent_ids’ => [], ‘tree’ => [], ]; } $groupByParent = [];… Read More Get parent and leaf ids from tree builder
Advertisements I have PHP array (tree), something like this: $categoryTree = [ 0 => [ ‘id’ => 1360, ‘parent’ => 0, ‘name’ => ‘main A’, ‘children’ => [ 0 => [ ‘id’ => 1361, ‘parent’ => 1360, ‘name’ => ‘sub a1’ ], 1 => [ ‘id’ => 57, ‘parent’ => 1360, ‘name’ => ‘sub a2’… Read More How I can flatten a tree in an orderly way?
Advertisements Here is what ive done: food =["cheeseburger", "smallchips", "drink"] prices =[2.50, 1.50, 1] x=0 myorderfood=[] myordercost=[] print("Burgers\n") print("Menu:") print("Cheeseburger. Cost – $2.50 each") print("Small chips. Cost – $1.50 each") print("Drink – Cola only. Cost – $1.00 each\n") I want to display an invoice at the end once the user has completed there order showing… Read More I would like to make my program display the order total/invoice
Advertisements I studied the concept of XPath and xml but did not understand how they relate to what XPath is designed to do as a query in xml and what XPath for xml is like for sql for a database, what xquery is for query xml data ? >Solution : Differences between XPath and LINQ… Read More Is XPath the same as Linq?