Stuck on an issue?
Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.
And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.
Don't serialize undefined properties
See original GitHub issueIssue Description
console.log(Transit.writer("json").write({name: undefined}))
The above currently returns ["^ ","name",null].
I would argue null and undefined are different concepts. Both are falsy in the JavaScript sense, sure, but not equivalent in the semantic sense. Null could be said to be a known “unset” value (like in a tuple of false, true, null). Undefined, however, could be said to mean an unknown value entirely.
As Dave Herman said in July 29 2014 TC39 Meeting Notes:
- `null` represents the no-object object, just like NaN represents the no-number number
- `undefined` represents the no-value value
I propose to either ignore undefined properties in objects entirely or add an explicit tag for it. But few languages have both a null and undefined, and that would require changing the Transit protocol. Better just ignore them like JSON.stringify does.
Issue Analytics
- State:
- Created 9 years ago
- Reactions:1
- Comments:7 (2 by maintainers)
Top Results From Across the Web
Top Related Medium Post
Top Related StackOverflow Question
Troubleshoot Live Code
Top Related Reddit Thread
Top Related Hackernoon Post
Top Related Tweet
Top Related Dev.to Post
Top Related Hashnode Post
Hello again. Long time no bugfix. 😃
Anywho, this is still an issue for me as
undefinedvalues are morphed intonulls causing all kinds of weird behavior on the receiving end. Has there been any development here?Who still thinks
nulls are equivalent toundefinedvalues that I have to convince?Cheers
Any known workarounds for supporting
undefined? You cannot simply create a handler forundefined(https://github.com/cognitect/transit-js/blob/master/src/com/cognitect/transit/impl/writer.js#L65)