applyUpdates.php

<?php

	function applyUpdate($diff, $arr1, $arr2){
		$status = false;
		if(count($diff['different']) > 0){
			foreach ($diff['different'] as $key => $value) {
				$exec = '$arr1.'.$value.' = $arr2.'.$value.';';
				$exec = preg_replace("/\.(\d{1,3})/", "[$1]", $exec);

				$exec = preg_replace('/\.(\w*)/', "['$1']", $exec);

				eval($exec);
				$status = true;
			}
		}

		if(count($diff['missing_from_first']) > 0){
			foreach ($diff['missing_from_first'] as $key => $value) {
				$exec  = '$arr1.'.$value;
				$exec  = preg_replace('/\.(\d{1,3})/', '[$1]', $exec);
				$split = explode('.', $exec);
				$last  = $split[count($split)-1];
				preg_match_all('/\[(\d*)\]/', $last, $index);
				$join  = str_replace($last, str_replace('['.$index[1][0].']', '', $last), $exec);

				$exec  = 'array_push('.$join.', $arr2.'.$value.');';
				$exec  = preg_replace('/\.(\d{1,3})/', '[$1]', $exec);

				$exec = preg_replace('/\.(\w*)/', "['$1']", $exec);

				eval($exec);
				$status = true;
			}
		}

		if(count($diff['missing_from_second']) > 0){
			foreach ($diff['missing_from_second'] as $key => $value) {
				$exec  = '$arr1.'.$value;
				$exec  = preg_replace('/\.(\d{1,3})/', '[$1]', $exec);
				$split = explode('.', $exec);
				$last  = $split[count($split)-1];
				preg_match_all('/\[(\d*)\]/', $last, $index);
				$join  = str_replace($last, str_replace('['.$index[1][0].']', '', $last), $exec);

				$exec  = 'array_splice('.$join.', '.$index[1][0].');';

				$exec = preg_replace('/\.(\w*)/', "['$1']", $exec);

				eval($exec);
				$status = true;
			}
		}
		
		if($status){
			return $arr1;
		}else{
			return false;
		}
	}

compare.js

var compare = function (a, b) {

    var result = {
        different: [],
        missing_from_first: [],
        missing_from_second: []
    };

    _.reduce(a, function (result, value, key) {
    if (b.hasOwnProperty(key)) {
        if (_.isEqual(value, b[key])) {
            return result;
        } else {
        if (typeof (a[key]) != typeof ({}) || typeof (b[key]) != typeof ({})) {
            //dead end.
            result.different.push(key);
            return result;
        } else {
            var deeper = compare(a[key], b[key]);
            result.different = result.different.concat(_.map(deeper.different, (sub_path) => {
            return key + "." + sub_path;
        }));

            result.missing_from_second = result.missing_from_second.concat(_.map(deeper.missing_from_second, (sub_path) => {
            return key + "." + sub_path;
        }));

            result.missing_from_first = result.missing_from_first.concat(_.map(deeper.missing_from_first, (sub_path) => {
            return key + "." + sub_path;
        }));
            return result;
        }
        }
    } else {
        result.missing_from_second.push(key);
        return result;
    }
    }, result);

    _.reduce(b, function (result, value, key) {
        if (a.hasOwnProperty(key)) {
            return result;
        } else {
            result.missing_from_first.push(key);
            return result;
        }
    }, result);

    return result;
}

function applyUpdate(arr1, arr2){
    diff = compare(arr1, arr2);

    if(diff.different.length > 0){
        for(key in diff.different){
            value = diff.different[key];
            exec  = "arr1." + value + " = arr2." + value + ";";
            exec  = exec.replace(/\.(\d{1,3})/g,"[$1]");

            eval(exec);
        }
    }

    if(diff.missing_from_first.length > 0){
        for(key in diff.missing_from_first){
            value = diff.missing_from_first[key];

            exec  = "arr1." + value;
            exec  = exec.replace(/\.(\d{1,3})/g,"[$1]");
            split = exec.split('.');
            last  = split[split.length-1];
            index = last.match(/[(\d{1,3})]/g);
            join  = exec.replace(last, last.replace("[" + index[0] + "]", ""));

            exec  = join + ".push(arr2." + value + ");";
            exec  = exec.replace(/\.(\d{1,3})/g,"[$1]");

            eval(exec);
        }
    }

    if(diff.missing_from_second.length > 0){
        for(key in diff.missing_from_second){
            value = diff.missing_from_second[key];
            exec  = "arr1." + value;
            exec  = exec.replace(/\.(\d{1,3})/g,"[$1]");
            split = exec.split('.');
            last  = split[split.length-1];
            index = last.match(/[(\d{1,3})]/g);
            join  = exec.replace(last, last.replace("[" + index[0] + "]", ""));

            eval(join + '.splice(' + index + ', 1)');
        }
    }

    return arr1;
}