How to update specific key on existing multidimensional array in twig

template.html.twig

{% set contents = {"one": 1,"two":2,"three":3,"four":4,"five":5} %}
{# Create the array an structure somewhere in the view #}
{% set twigArray = {} %}
{% for content in contents %}
    {% set twigArray = twigArray|merge({('hashkey_'~loop.index0):{'enabled':true,'caption':'unknow','button':{'text':'unknow','href':'unknow'},'image':{'src': content.content|raw),'alt':"image-"~loop.index, 'href':"" }}}) %}
{% endfor %}
{{ dump(twigArray)}}

{# For any reason you need to update a specific key value in the exiting array in the view 
call the twig extension to do that in php side #}
{# in this example otherContents have the same length than contents #}
{% set otherContents = {"one": 1,"two":4,"three":9,"four":16,"five":25} %}
{% for otherContent in otherContents %}
    {% set twigArray = twigArray|merge({('hashkey'~loop.index0):editArrayByHashKey(twigArray[('slide_'loop.index0)], 'five', otherContent)}) %}
{% endfor %}
{{ dump(twigArray)}}

twigExt.php

<?php

namespace App\Twig;

use Twig\Extension\AbstractExtension;
use Twig\TwigFunction;

class twigExt extends AbstractExtension
{
    /**
     * {@inheritdoc}
     */
    public function getFunctions(): array
    {
        return [
            new TwigFunction('editArrayByHashKey', [$this, 'editArrayByHashKey']),
        ];
    }
    /**
     * @param array $array
     * @param $key
     * @param $value
     * @return array
     */
    public function editArrayByHashKey($array, $key, $value)
    {
        $array[$key] = $value;
        return $array;
    }
}