Why can I not delete a object property with a dynamic route?

Asked Apr 08 '21 at 12:02

Active Apr 08 '21 at 12:12

Viewed 41 times

Why can I not delete a object property with a dynamic route?

website I looked at: Accessing nested JavaScript objects and arrays by string path

Object.byString = function(o, s) {
    s = s.replace(/\[(\w+)\]/g, '.$1'); // convert indexes to properties
    var a = s.split('.');
    for (var i = 0, n = a.length; i < n; ++i) {
        var k = a[i];
        if (k in o) {
            o = o[k];
        } else {
            return;
        }
    }
    return o;
}

    
var someObject = {
    'part1' : {
        'a':{
            'name': 'Part 1',
            'size': '20',
            'qty' : '50'
        },
        'b':{}
    },
    'part2' : {
        'name': 'Part 2',
        'size': '15',
        'qty' : '60'
    }
};

x = "name";

route = "part1.a."+x+"";


// this works not
delete Object.byString(someObject, route);
console.log(Object.byString(someObject, route));
//Returns: Part 1

// this works
delete someObject['part1']['a']['name'];
console.log(someObject['part1']['a']['name']);
//Returns: undefined

edited Apr 08 '21 at 12:12

asked Apr 08 '21 at 12:02

Tim

1

you need to call `delete` on *a property*. `Object.byString(someObject, route)` just returns the value for that property. – VLAZ Apr 08 '21 at 12:04
@VLAZ Is this not returning the property: Part 1? `Object.byString(someObject, route)` – Tim Apr 08 '21 at 12:15
Returns the value that belongs to that property. Not *the* property. The property is part of an object, not an atomic unit that can be passed around. – VLAZ Apr 08 '21 at 12:17
@VLAZ Can you send a example for my code? – Tim Apr 08 '21 at 12:21
`route = "part1.a"; delete Object.byString(someObject, route)[x];` – VLAZ Apr 08 '21 at 12:24
@VLAZ It works ty – Tim Apr 08 '21 at 12:27

Why can I not delete a object property with a dynamic route?

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