node - Converting to JSON fails, but can print in console

Question

I'm attempting to convert an array to JSON to be sent to a client. Here is what the data looks like in console:

[ NL: [ true, true, true, true, true, true, true, true, true, true, true, true ],                                                                                        
LU: [ true,                                                                                                                                                            
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
false,                                                                                                                                                               
false,                                                                                                                                                               
false ],                                                                                                                                                             
SE: [ false, false, false ] ]

However when I run this (res being an express.js socket):

console.log(st.bot.serverStatus);
res.send(JSON.stringify(st.bot.serverStatus));

I get the output in console like expected, but I get [] from the web browser. What am I doing wrong?

PS: I am unable to change the format of the elements, they are generated by this method:

        if(st.bot.serverStatus[tmp.country] !== undefined) {
            st.bot.serverStatus[tmp.country][st.bot.serverStatus[tmp.country].length] = alive;
        } else {
            st.bot.serverStatus[tmp.country] = [ alive ];
        }

Can you add the output you get from the server?

RobertoNovelo
– RobertoNovelo

2015-04-15 00:49:04 +00:00
Commented Apr 15, 2015 at 0:49 — RobertoNovelo
– RobertoNovelo, Commented Apr 15, 2015 at 0:49
How are you initializing st.bot.serverStatus ?

Felix Kling
– Felix Kling

2015-04-15 00:58:59 +00:00
Commented Apr 15, 2015 at 0:58 — Felix Kling
– Felix Kling, Commented Apr 15, 2015 at 0:58
st.bot.serverStatus = [];

duper51
– duper51

2015-04-15 02:41:24 +00:00
Commented Apr 15, 2015 at 2:41 — duper51
– duper51, Commented Apr 15, 2015 at 2:41

carter · Accepted Answer · 2015-04-15 00:42:13Z

1

It's not valid syntax at SE: and LE: since it is an array and not an object. Change the outermost [] to {} or change : to ,

answered Apr 15, 2015 at 0:42

carter

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Comments

RobertoNovelo · Accepted Answer · 2015-04-15 00:45:21Z

Use either:

console.log(JSON.stringify({ NL: [ true, true, true, true, true, true, true, true, true, true, true, true ],                                                                                        
LU: [ true,                                                                                                                                                            
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
false,                                                                                                                                                               
false,                                                                                                                                                               
false ],                                                                                                                                                             
SE: [ false, false, false ] } ));

Or:

console.log(JSON.stringify([{ NL: [ true, true, true, true, true, true, true, true, true, true, true, true ]},                                                                                        
{LU: [ true,                                                                                                                                                            
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
true,                                                                                                                                                                
false,                                                                                                                                                               
false,                                                                                                                                                               
false ]},                                                                                                                                                             
{SE: [ false, false, false ] }] ));

Your JSON format is incorrect.

Use something like

jsonformatter.curiousconcept.com

or

jsoneditoronline.org

To validate your JSONs

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