Question

How to format and use data for JSON (JavaScript Object Notation) in JavaScript

Answer 1

function obj_size(obj)  {
    var key, count = 0;
     
    for (key in obj.worker) 
         if (obj.worker.hasOwnProperty(key)) 
             count++;
              
    return count;
}


const w = '{"worker" : [' +
'{"name":"Tom", "age":37},' +
'{"name":"Olivia", "age":42},' +
'{"name":"Jerry", "age":51},' +
'{"name":"Alessia", "age":29} ]}';
 
const JSONobj = JSON.parse(w); 
 
const size = obj_size(JSONobj);
 
for (i = 0; i < size; i++)
     console.log(JSONobj.worker[i].name + " " + JSONobj.worker[i].age);
 



 
/*
run:
 
"Tom 37"
"Olivia 42"
"Jerry 51"
"Alessia 29"
 
*/

 

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Answer 2

const w = '{"worker" : [' +
'{"name":"Tom", "age":37},' +
'{"name":"Olivia", "age":42},' +
'{"name":"Jerry", "age":51},' +
'{"name":"Alessia", "age":29} ]}';
 
const JSONobj = JSON.parse(w); 
 
const size = Object.keys(JSONobj.worker).length

for (i = 0; i < size; i++)
     console.log(JSONobj.worker[i].name + " " + JSONobj.worker[i].age);
 



 
/*
run:
 
"Tom 37"
"Olivia 42"
"Jerry 51"
"Alessia 29"
 
*/

 

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