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PHP: Handle only parents on array


PHP: Handle only parents on array

By : gbl7713
Date : November 21 2020, 11:01 PM
it should still fix some issue You can simply return the key of the array (which is the family name):
code :
foreach($families as $key => $family){
  echo "FAMILY NAME = ".$key;
}


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How to modify preorder tree traversal algorithm to handle nodes with multiple parents?

How to modify preorder tree traversal algorithm to handle nodes with multiple parents?


By : Dmitry Kolomiets
Date : March 29 2020, 07:55 AM
Does that help A tree is basically a directed unweighted graph, where each vertice has N or less edges, and no cycles can happen.
If your'e certain there are no cycles in your tree, you could just treat a parent as another child of the specified node, and preform a preorder traversal normally.
How to handle adding elements and their parents using xpath

How to handle adding elements and their parents using xpath


By : Patrick Donovan Brow
Date : March 29 2020, 07:55 AM
will be helpful for those in need Ok, I have a case where I need to add a tag to a certain other tag given an xpath.
code :
def to_xml(parent, xpath, value):
    """
    parent: lxml.etree.Element
    xpath: string like 'x/y/z', anything more complex is likely to break
    value: anything, if is False - means delete node
    """        
    # find the node to proceed further        
    nodes = parent.xpath(xpath)        
    if nodes:
        node = nodes[0]
    else:
        parts = xpath.split('/')
        p = parent
        for part in parts:
            nodes = p.xpath(part)
            if not nodes:
                n = etree.XML("<%s/>" % part)
                p.append(n)
                p = n
            else:
                p = nodes[0]
        node = p
    # do whatever is specified vy value
    if value is False:
        node.getparent().remove(node)
    else:
        node.text = str(value)
How to handle tables with multiple parents

How to handle tables with multiple parents


By : Spacey_Globule
Date : March 29 2020, 07:55 AM
I wish this help you I would create the complaint as an entity in it's own right, then have link table between all the different things it can be associated with.
So, I'd have the following tables ...
Array trees finding parents and ther parents and the shortes path to the root

Array trees finding parents and ther parents and the shortes path to the root


By : user3543856
Date : March 29 2020, 07:55 AM
I wish this helpful for you It's actually pretty simple. The hardest part was to convert the data for the unit tests, so that they can be efficiently typed.
code :
package so7455242;

import static org.junit.Assert.*;

import org.junit.Test;

import com.google.common.primitives.Ints;

public class DistanceFinder {

  private static int[] findPathLengths(int[] parent) {
    int[] distances = new int[parent.length];
    for (int i = 0; i < parent.length; i++) {
      int distance = 0;
      for (int node = i; node != 0; node = parent[node]) {
        distance++;
      }
      distances[i] = distance;
    }
    return distances;
  }

  private static int[] toIntArray(String s) {
    String[] words = s.split(" ");
    int[] ints = new int[words.length];
    for (int i = 0; i < ints.length; i++) {
      ints[i] = Integer.parseInt(words[i]);
    }
    return ints;
  }

  private static void testcase(String expected, String input) {
    int[] nodeDefinitions = toIntArray(input);
    int[] pathLengths = findPathLengths(nodeDefinitions);
    String actual = Ints.join(" ", pathLengths);
    assertEquals(expected, actual);
  }

  @Test
  public void test() {
    testcase("0 1 1 2 2", "0 0 0 1 2");
    testcase("0 1 2 3 2 3", "0 0 1 2 1 4");
  }

}
PHP - Return array of parents from multidimensional associative array for breadcrumb list

PHP - Return array of parents from multidimensional associative array for breadcrumb list


By : SPD
Date : March 29 2020, 07:55 AM
will be helpful for those in need I'm trying to create dynamic breadcrumbs from an array. So I can add to the array and not have to manually update the breadcrumbs. , In your example there are actually two paths possible:
code :
Key 'Project settings' found: 'Projects' -> 'Project 1'
Key 'Project settings' found: 'Projects' -> 'Project 2'
$search = 'Project settings';
$it     = new ParentKeysIterator($menu);
foreach ($it as $key) {
    if ($key !== $search) continue;
    printf("Key '%s' found: '%s'\n", $key, implode("' -> '", $it->key()));
}
class ParentKeysIterator extends RecursiveIteratorIterator
{
    public function __construct(array $array) {
        parent::__construct(new  RecursiveArrayIterator($array));
    }

    public function current() {
        return parent::key();
    }

    public function key() {
        return $this->getParentKeys();
    }


    public function getParentKeys() {
        $keys = [];
        for ($depth = $this->getDepth() - 1; $depth; $depth--) {
            array_unshift($keys, $this->getSubIterator($depth)->key());
        }
        return $keys;
    }
}
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