Replacing null returns error

[ghost]

@Starcounter-Jack I'm on 0.5.1.

My object: {foo: null}
My patch: [ { op: 'replace', path: '/foo', value: 'whatever' } ]
Returns: "Cannot perform the operation at a path that does not exist".
Expected: {foo: 'whatever'}

[tomalec]

Thanks for reporting @winduptoy!
I'm currently working on fixing entire falsy values approach, pleas let me know if you find any similar cases.

[tomalec]

@winduptoy, it should work fine now. It wil be released as 0.5.2
I've also added test cases to json-patch/json-patch-tests#17. Once PR will get merged (or rejected) I will merge it to our repo as well.

[ghost]

👍

[gdibble]

good fix!