* returns extra falsey values at the level of the wildcard

[ALawliet]

> obj
{ 
    foo: { 
        bar: { 
            qux: 'asdf' 
        },
        baz: null,
        ping: 'pong' 
    } 
}

> mask(obj,'foo/*/qux')
{ 
    foo: { 
        bar: { 
            qux: 'asdf' 
        },
        baz: null
    } 
}

Is this intended? I was expecting:

{ 
    foo: { 
        bar: { 
            qux: 'asdf' 
        }
    } 
}

[nemtsov]

Thanks for reporting this. I'd expect the same result as you (without baz: null). I'll look into it.

[yckart]

Quick and dirty fix...

json-mask/lib/filter.js

Line 36 in 3109601

if (!util.has(ret, retKey)) continue

@@ -35,5 +35,6 @@
for (retKey in ret) {
  if (!util.has(ret, retKey)) continue
+ if (util.isEmpty(ret[retKey])) continue
  maskedObj[retKey] = ret[retKey]
}

[nemtsov]

@yckart thank you for your contribution. If you're interested in making the code above into a PR with the change and test, I'll review and merge it asap.

[yckart]

@nemtsov But I'm not sure, what's falsey?

null

...are empty arrays/objects/strings "empty values" too?

[]
{}
""

...and those?

[null, ""]
[ , , , ]
" "