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Creating a tree using std::array


Creating a tree using std::array

By : Sarah Adams
Date : November 18 2020, 11:13 AM
wish helps you As noted in the other answers, the fundamental problem here is that you are using a type inside the definition of that type.
The reason this is a problem is because the compiler must know how big a type is in order for you to have it as a data member. Because you have not finished declaring the Node type, the compiler does not know how much space it should use for a data member of type Node.
code :


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Creating a dynamic tree array from another array

Creating a dynamic tree array from another array


By : andy lu
Date : March 29 2020, 07:55 AM
I wish did fix the issue. I have an array, lets call it $childrenIds, it outputs as follows: , For the first element in the array:
code :
[74252] => Array
    (
        [0] => 1753
        [1] => 1757
        [2] => 1758
        [3] => 1760
    )
[0] => 1753
[1] => 1753/1757
[2] => 1753/1757/1758
[3] => 1753/1757/1758/1760
$pathArray = array();
foreach($startArray as $subArray) {
    $pathStr = '';

    foreach($subArray as $v) {
        $pathStr = $pathStr.'/'.$v;
        $pathArray[]=$pathStr;
    }        
}

$pathArray = array_unique($pathArray);
$treeArray = explodeTree($pathArray, "/");
Creating a Javascript tree out of array of strings

Creating a Javascript tree out of array of strings


By : Anastasia Lopatina
Date : March 29 2020, 07:55 AM
will help you Given an array of an array of strings like such: , Your Question is not formulated very well. Maybe you want:
code :
var incoming = [['1', 'A', 'C', '3'], ['2', 'A', 'C', '1'], ['1', 'B', 'D', '3'], ['2', 'B', 'D', '4'], ['2', 'B', 'D', '5']];
var obj = {}, propNames = ['prop1', 'prop2', 'prop3', 'prop4', 'prop5'];
for(var i in incoming){
   obj[propNames[i]] = incoming[i];
}
var incoming = [['1', 'A', 'C', '3'], ['2', 'A', 'C', '1'], ['1', 'B', 'D', '3'], ['2', 'B', 'D', '4'], ['2', 'B', 'D', '5']];
var obj = {}, propNames = ['prop1', 'prop2', 'prop3', 'prop4', 'prop5'];
for(var i=0,l=incoming.length; i>l; i++){
    obj[propNames[i]] = incoming[i];
}
var output = {};
for(var i in incoming){
  var inc = incoming[i];
  output[inc[0]][inc[1]][inc[2]][inc[3]] = 'x';
}
Creating a non-binary tree from a two-dimensional array in PHP

Creating a non-binary tree from a two-dimensional array in PHP


By : user3025253
Date : March 29 2020, 07:55 AM
help you fix your problem If you want to transform your PHP structure to a simple JS Map, then you could use something like this in JS to create your structure:
code :
const makeTree = (data, nodes = [...data .keys ()], path = []) => { 
  const res = nodes
    .filter ((id) => path .filter (x => x == id) .length < 2)
    .map((id) => {
      const kids = makeTree(data, data .get (id), path .concat (id));
      return {
        text: id,
        ...(kids .length ? {items: kids} : {})
      }
    })
    return res
}

const data = new Map([
  ['1', ['2', '3', '4']],
  ['2', ['3']],
  ['3', ['3', '1']],
  ['4', ['2']]
])


console .log (
  makeTree (data) 
)
      return {
        text: id,
        path: path.join('') + id,
        ...(kids .length ? {items: kids} : {})
      }
/*

1                                       (1)
...2                                    (12)
.......3                                (123)
...........3                            (1233)
...............1                        (12331)
...................2                    (123312)
...................4                    (123314)
.......................2                (1233142)
...........1                            (1231)
...............2                        (12312)
...................3                    (123123)
...............3                        (12313)
...............4                        (12314)
...................2                    (123142)
.......................3                (1231423)
...3                                    (13)
.......3                                (133)
...........1                            (1331)
...............2                        (13312)
...............4                        (13314)
...................2                    (133142)
.......1                                (131)
...........2                            (1312)
...............3                        (13123)
...........3                            (1313)
...........4                            (1314)
...............2                        (13142)
...................3                    (131423)
...4                                    (14)
.......2                                (142)
...........3                            (1423)
...............3                        (14233)
...................1                    (142331)
.......................2                (1423312)
.......................4                (1423314)
...........................2            (14233142)
...............1                        (14231)
...................2                    (142312)
.......................3                (1423123)
...................3                    (142313)
...................4                    (142314)
.......................2                (1423142)
...........................3            (14231423)
2                                       (2)
...3                                    (23)
.......3                                (233)
...........1                            (2331)
...............2                        (23312)
...............4                        (23314)
...................2                    (233142)
.......1                                (231)
...........2                            (2312)
...............3                        (23123)
...................1                    (231231)
.......................4                (2312314)
...........3                            (2313)
...............1                        (23131)
...................2                    (231312)
...................4                    (231314)
.......................2                (2313142)
...........4                            (2314)
...............2                        (23142)
...................3                    (231423)
.......................1                (2314231)
...........................4            (23142314)
3                                       (3)
...3                                    (33)
.......1                                (331)
...........2                            (3312)
...........4                            (3314)
...............2                        (33142)
...1                                    (31)
.......2                                (312)
...........3                            (3123)
...............1                        (31231)
...................2                    (312312)
...................4                    (312314)
.......................2                (3123142)
.......3                                (313)
...........1                            (3131)
...............2                        (31312)
...............4                        (31314)
...................2                    (313142)
.......4                                (314)
...........2                            (3142)
...............3                        (31423)
...................1                    (314231)
.......................2                (3142312)
.......................4                (3142314)
...........................2            (31423142)
4                                       (4)
...2                                    (42)
.......3                                (423)
...........3                            (4233)
...............1                        (42331)
...................2                    (423312)
...................4                    (423314)
.......................2                (4233142)
...........1                            (4231)
...............2                        (42312)
...................3                    (423123)
.......................1                (4231231)
...........................4            (42312314)
...............3                        (42313)
...................1                    (423131)
.......................2                (4231312)
.......................4                (4231314)
...........................2            (42313142)
...............4                        (42314)
...................2                    (423142)
.......................3                (4231423)
...........................1            (42314231)

*/
Creating an optimal binary search tree, same as creating a huffman tree?

Creating an optimal binary search tree, same as creating a huffman tree?


By : Jabinara
Date : March 29 2020, 07:55 AM
Hope that helps They're actually two different problems. Huffman tree generation does not need to preserve key order, whereas BST generation does. Furthermore, Huffman tree generation requires extra nodes to "join" other nodes, which is not the case in BSTs (you join nodes with already existing nodes).
For "optimal" BST generation, you want to minimize the weighted sum of all node depths (with the weight being the frequency of the node). In this case, p3 should be the parent of p2 and p4, and p2 should be the parent of p1. This generates a "weighted sum" of:
Creating tree object from flat array

Creating tree object from flat array


By : eamirgh
Date : March 29 2020, 07:55 AM
Hope that helps I found the solution to a problem that is similar to your question.
_makeTree
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