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How to recursively find all possible combinations of a sequence tree?


By : Randy
Date : August 01 2020, 11:00 PM
this will help [Python 3.7] , For the first part, maybe itertools can help:
code :
for x in itertools.product(*A):
    print(x)
(1, 2, 4, 5, 5)
(1, 2, 4, 5, 3)
(1, 2, 4, 6, 5)
(1, 2, 4, 6, 3)
(1, 2, 4, 2, 5)
(1, 2, 4, 2, 3)
(1, 4, 4, 5, 5)
(1, 4, 4, 5, 3)
(1, 4, 4, 6, 5)
(1, 4, 4, 6, 3)
(1, 4, 4, 2, 5)
(1, 4, 4, 2, 3)


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Recursively find combinations in PHP


By : robin_sparkles
Date : March 29 2020, 07:55 AM
wish helps you Most likely what you want is to generate all combinations with O((n^2-n)/2) and then compare it with the 2nd array and also what you want is to look at my example in Javascript. Array Waypoints hold your first Array. Array wayStr holds your solution. Then you need only to iterate through the solution and compare it with your 2nd array.
code :
function getWayStr(curr) {
   var nextAbove = -1;
   for (var i = curr + 1; i < waypoints.length; ++i) {
     if (nextAbove == -1) {
       nextAbove = i;
     } else {
        wayStr.push(waypoints[i]);
        wayStr.push(waypoints[curr]);
     }
    }
    if (nextAbove != -1) {
      wayStr.push(waypoints[nextAbove]);
      getWayStr(nextAbove);
      wayStr.push(waypoints[curr]);
    }
   } 

How can I recursively insert the Fibonacci sequence into a binary tree


By : hanskallor
Date : March 29 2020, 07:55 AM
should help you out Hope someone can help, I'm not a programmer, but have been interested in exploring Fibonacci sequence and it's recursive tree... , Here's the simplest solution I can think of:
code :
class FibTree(object):
    def __init__(self, n):
        self.n = n
        if n < 2:
            self.value = n
        else:
            self.left = FibTree(n - 1)
            self.right = FibTree(n - 2)
            self.value = self.left.value + self.right.value

Recursively search for parent child combinations and build tree in python and XML


By : kazafog
Date : March 29 2020, 07:55 AM
To fix this issue I am trying to traverse this XML data full of parent->child relationships and need a way to build a tree. Any help will be really appreciated. Also, in this case, is it better to have attributes or nodes for the parent-->child relationship? , rec.xml:
code :
<?xml version="1.0"?>
<nodes>
    <node name="Car" child="Engine"></node>
    <node name="Engine" child="Piston"></node>
    <node name="Engine" child="Carb"></node>
    <node name="Car" child="Wheel"></node>
    <node name="Wheel" child="Hubcaps"></node>
    <node name="Truck" child="Engine"></node>
    <node name="Truck" child="Loading Bin"></node>
    <node name="Piston" child="Loa"></node>
    <node name="Piston" child="Loaqq"></node>
    <node name="Piston" child="Loaww"></node>
    <node name="Loaww" child="Loawwqqqqq"></node>
    <node name="Spare Wheel" child=""></node>
</nodes>
import xml.etree.ElementTree as ET
tree = ET.parse('rec.xml')
root = tree.getroot()
data = {}
child_list = []
def recursive_print(string,x):
    if x in data.keys():
     for x_child in data[x]:
        if x_child in data.keys():
          recursive_print(string+'-------->'+x_child,x_child)
        else:
         print string+'-------->'+x_child
    else:
       print string

for nodes in root.findall('node'):
    parent = nodes.attrib.get('name')
    child = nodes.attrib.get('child')
    child_list.append(child)
    if parent not in data.keys():
        data[parent] = []
    data[parent].append(child)
for key in data.keys():
    if key not in child_list:
      for x in data[key]:
        string = key+'------->'+x
        recursive_print(string,x)
Spare Wheel------->
Car------->Engine-------->Piston-------->Loa
Car------->Engine-------->Piston-------->Loaqq
Car------->Engine-------->Piston-------->Loaww-------->Loawwqqqqq
Car------->Engine-------->Carb
Car------->Wheel-------->Hubcaps
Truck------->Engine-------->Piston-------->Loa
Truck------->Engine-------->Piston-------->Loaqq
Truck------->Engine-------->Piston-------->Loaww-------->Loawwqqqqq
Truck------->Engine-------->Carb
Truck------->Loading Bin

Recursively find combinations of three numbers that sum up to given number


By : Amix
Date : March 29 2020, 07:55 AM
help you fix your problem You can see why the duplicates are happening if you add a little logging
code :
1:1:1
2:1:1
3:1:1
3 + 1 + 1
4:1:1
3:2:1
3:1:2
2:2:1
2 + 2 + 1
3:2:1
2:3:1
2:2:2
2:1:2
2 + 1 + 2
3:1:2
2:2:2
2:1:3
1:2:1
2:2:1
2 + 2 + 1
3:2:1
2:3:1
2:2:2
1:3:1
1 + 3 + 1
2:3:1
1:4:1
1:3:2
1:2:2
1 + 2 + 2
2:2:2
1:3:2
1:2:3
1:1:2
2:1:2
2 + 1 + 2
3:1:2
2:2:2
2:1:3
1:2:2
1 + 2 + 2
2:2:2
1:3:2
1:2:3
1:1:3
1 + 1 + 3
2:1:3
1:2:3
1:1:4
counter:9

Find all combinations in arraylist recursively


By : jAANUSZEK0700
Date : March 29 2020, 07:55 AM
I wish this helpful for you You can use this concept and make your own recursive function. using that you can get all possible combinations.
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