Use lodash to group array into tree "children" structure

Use lodash to group array into tree "children" structure

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Use lodash to group array into tree "children" structure
Tag : javascript , By : eataix
Date : November 24 2020, 09:00 AM

Hope that helps Use _.reduce() instead of transform, because it lets you state the end product format:
var arr = [{
  text: 'apple',
  type: 'fruit'
}, {
  text: 'pear',
  type: 'fruit',
}, {
  text: 'potato',
  type: 'vegetable'
}, {
  text: 'water',
  type: 'beverage'

var results = _(arr)
  .reduce(function(array, children, key) {
      text: key,
      children: children

    return array;
  }, []);

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/3.10.1/lodash.js"></script>

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How to have a "master-structure" database with "children-data" databases in SQL SERVER 2005?

Tag : sql-server , By : sadboy
Date : March 29 2020, 07:55 AM
will be helpful for those in need What you really need is to version-control your database schema.
See do-you-source-control-your-databases

Recursively operating on a tree structure: How do I get the state of the "entire" tree?

Tag : python , By : CM.
Date : March 29 2020, 07:55 AM
this will help You might be asking about tree zippers. Check: Functional Pearl: Weaving a Web and see if it applies to what you want. From reading your question, I think you're asking to do recursion on a tree structure, but be able to navigate back to the top as necessary. Zippers act as a "breadcrumb" to let you get back to the ancestors of the tree.
I have an implementation of one in JavaScript.

What is the difference btw "Order" and "Degree" in terms of Tree data structure

Tag : development , By : Alex Bartzas
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , Degree represents the lower bound on the number of children a node in the B Tree can have (except for the root). i.e the minimum number of children possible. Whereas the Order represents the upper bound on the number of children. ie. the maximum number possible.
B Tree properties with respect to the Order

Javascript - Create tree structure from array of objects using a group by to define children

Tag : javascript , By : Jorge Palacio
Date : March 29 2020, 07:55 AM
To fix this issue I have an array of objects from which I would like to group by a property to build a tree structure. , Haven't tested, but try:
var treeData = [],
    folders = {};

    if(obj.FolderName in folders)
        folders[obj.FolderName] = treeData.push({text: obj.FolderName, nodes: [{text:obj.NodeName}]}) - 1;

D3 Tree View, is key "children" required to properly display a tree

Tag : json , By : Lathentar
Date : March 29 2020, 07:55 AM
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