var {getPositions} = require('lodash-bzextras');
 
    var input ={
        key1: 'string',
        key2: 'any',
        key3:[
            {
                test:[
                {
                    test2:'string'
                },
                {
                    test3:'string'
                },
                {
                    test4:'string'
                },
                ]
            },
            {
                test:[
                {
                    test1:'string'
                },
                {
                    test2:'string'
                },
                {
                    test3:'string'
                },
                {
                    test4:'string'
                },
                ]
            }
        ]
    }
 
    var poss = "key3[].test[].test4";
    var result = getPositions(input, poss);
    /**
        result = [
            "key3[0].test[2].test4",
            "key3[1].test[3].test4",
        ]
     * */
    var poss = "[*]";
    var result = getPositions(input, poss);
    /**
        result = [ 'key1', 'key2', 'key3' ],
        
     * */
    var poss = "[*][]";
    var result = getPositions(input, poss);
    /**
        result = [ 'key3[0]', 'key3[1]' ],
        
     * */