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How to convert nested array to normal array and change types?


How to convert nested array to normal array and change types?

By : zhengcai
Date : November 22 2020, 04:01 AM
Hope this helps I have the following structure of array: , You could use map with spread syntax ....
code :
const data = [{Id: 'Number', Attributes: {Name: 'String', Age: 'String', Height: 'String'}}]
const res = data.map(({Attributes, ...rest}) => ({...rest, ...Attributes}))
console.log(res)
const data = [{Id: 'Number', Attributes: {Name: 'String', Age: '20', Height: '123'}}]
const res = data.map(({Attributes: {Age, Height, ...attr}, ...rest}) => ({
  ...rest,
  ...attr,
  Age: +Age,
  Height: +Height
}))
console.log(res)


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Convert normal Java Array or ArrayList to Json Array in android

Convert normal Java Array or ArrayList to Json Array in android


By : Nikita Hosur
Date : March 29 2020, 07:55 AM
I wish this helpful for you If you want or need to work with a Java array then you can always use the java.util.Arrays utility classes' static asList() method to convert your array to a List.
Something along those lines should work.
code :
String mStringArray[] = { "String1", "String2" };

JSONArray mJSONArray = new JSONArray(Arrays.asList(mStringArray));
How to convert an array list into a normal array and vice versa normal array into array list?

How to convert an array list into a normal array and vice versa normal array into array list?


By : James Grishkat
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Suppose arrlist is an ArrayList. To convert it into array,try the follwing code.
code :
Integer list[] = new Integer[arrlist.size()]; //arrlist is an ArrayList
list = arrlist.toArray(list2);
convert normal array in nested array with php

convert normal array in nested array with php


By : mehmetkilic
Date : March 29 2020, 07:55 AM
I wish this helpful for you I have a hierarchical database table like below , I have tried below function and it is working
code :
function select_all($con){
    $table_name ="SELECT * FROM `Category`";
    $table_name_result = mysqli_query($con,$table_name);
    $array = mysqli_fetch_all($table_name_result, MYSQLI_ASSOC);
    return $array;
}   

function buildTree(array $elements, $parentId = 0) {
    $branch = array();

    foreach ($elements as $element) {
        if ($element['parent_id'] == $parentId) {
            $children = buildTree($elements, $element['ID']);
            if ($children) {
                $element['children'] = $children;
            }
            $branch[] = $element;
        }
    }

    return $branch;
}
$select_all = select_all($con);
$subcategory = buildTree($select_all);
echo json_encode(array_map("utf8_converter",$subcategory));
Python: convert types in deeply nested dictionary or array

Python: convert types in deeply nested dictionary or array


By : user3556917
Date : March 29 2020, 07:55 AM
may help you . I think this will be easier to reason about if you put the conversion at the start, allow the recursive calls to pass the ObjectId and return the converted strings directly with the function rather than trying to convert inside the loops in the function. Then you can just pass the value into the recursion and get the string back.
Something like:
code :
from datetime import datetime

def clean_dict_helper(d):
    if isinstance(d, ObjectId) or isinstance(d, datetime):
        return str(d)

    if isinstance(d, list):  # For those db functions which return list
        return [clean_dict_helper(x) for x in d]

    if isinstance(d, dict):
        for k, v in d.items():
            d.update({k: clean_dict_helper(v)})

    # return anything else, like a string or number
    return d
clean_dict_helper({
    1: {
        1: ObjectId('5e0e83a6d0fbe7238c960ea0'),
        2: [ObjectId('5e0e83a6d0fbe7238c960ea0'), ObjectId('5e0e83a6d0fbe7238c960ea0')],
        3: datetime(2020, 1, 1),
        4: [{1: ObjectId('5e0e83a6d0fbe7238c960ea0')}],
        5: 'test'
    },
    2: [ObjectId('5e0e83a6d0fbe7238c960ea0'), ObjectId('5e0e83a6d0fbe7238c960ea0')]
})
{1: {1: '5e0e83a6d0fbe7238c960ea0',
  2: ['5e0e83a6d0fbe7238c960ea0', '5e0e83a6d0fbe7238c960ea0'],
  3: '2020-01-01 00:00:00',
  4: [{1: '5e0e83a6d0fbe7238c960ea0'}],
  5: 'test'},
 2: ['5e0e83a6d0fbe7238c960ea0', '5e0e83a6d0fbe7238c960ea0']}
    if isinstance(d, dict):
        return {k:clean_dict_helper(v) for k, v in d.items() }
How can I convert normal array of objects to multilevel array in javascript?

How can I convert normal array of objects to multilevel array in javascript?


By : stealthgate
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further .filter() the b so it contains only items with parent_id: null .map() remaining items, assigning children to them .map() children for each of the root level parents to return them without parent_id field (optional, not in the example)
code :
var b = [
    {id: 1, name: 'England',parent_id: null},
    {id: 2, name: 'Spain',parent_id: null},
    {id: 3, name: 'Chelsea',parent_id: 1},
    {id: 4, name: 'Manchester United',parent_id: 1},
    {id: 5, name: 'Real Madrid',parent_id: 2},
    {id: 6, name: 'Barcelona',parent_id: 2},
    {id: 7, name: 'Hazard',parent_id: 3},
    {id: 8, name: 'Morata',parent_id: 3},
    {id: 9, name: 'Pogba',parent_id: 4},
    {id: 10, name: 'Lukaku',parent_id: 4},
    {id: 11, name: 'Ronaldo',parent_id: 5},
    {id: 12, name: 'Bale',parent_id: 5},
    {id: 13, name: 'Messi',parent_id: 6},
    {id: 14, name: 'Suarez',parent_id: 6},
];

const done = b.filter(person => !person.parent_id).map(person => {

  return {
    id      : person.id,
    name    : person.name,
    children: b.filter(child => child.parent_id == person.id)
  }

});

console.log(done);
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