Doing nothing within the ternery operator

Question

In my nodeJS server I've got the following:

console.log(socket.geoData.hostname + socket.geoData.uri + ": " + 
                                socket.geoData.country + 
                                (socket.geoData.city != "false" ? ", " + socket.geoData.city : false)
                            );

But if condition fails it is actually appending the word false and not simply doing nothing. In PHP, I could return false and nothing would be appended. How can I achieve that here?

I don't know the order of operations for the ternery operator relative to the != "False" statement so you may wish to add a parenthesis to make it explicit. Also, why not just say "" instead of false? — BobtheMagicMoose, Mar 12 '19 at 13:34
I just found one answer as per your question asked answered by @fra9001[https://stackoverflow.com/questions/31960619/javascript-ternary-operator-with-empty-else/31960809] — Suresh Shetiar, Mar 12 '19 at 13:44

score 2 · Answer 1 · answered Mar 12 '19 at 13:28

2

Just return empty string ("") instead of false

answered Mar 12 '19 at 13:28

luthfianto

1,746
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Dammit, why didnt I think of that. Sorry. Thank you. – Chud37 Mar 12 '19 at 13:29

score 0 · Answer 2 · answered Mar 12 '19 at 13:28

0

You could take an empty string as value.

console.log(socket.geoData.hostname + socket.geoData.uri + ": " +
  socket.geoData.country +
  (socket.geoData.city != "false" ? ", " + socket.geoData.city : "")
);

answered Mar 12 '19 at 13:28

Nina Scholz

376,160
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392

score 0 · Answer 3 · answered Mar 12 '19 at 13:32

You can wrap the code in a if, who checks if the socket.getData.city is != false, before do anything

if(socket.geoData.city !== "false") {
    console.log(`${socket.geoData.hostname}@${socket.geoData.uri}:`);
    console.log(`${socket.geoData.country} - ${socket.geoData.city}`);
}

Doing nothing within the ternery operator

3 Answers3