Node.js - JSON object manipulation - json

Question

I have a problem converting my JSON to desired format. I have something like this:
{
"one:apple": "5",
"one:orange": "10",
"two:apple": "6",
"two:orange": "11"
}
and I would like to get:
[
["one","5","10"],
["two","6","11"]
]
Any help appreciated...

Answer 1

Assuming that your JSON is:
{
"one:apple": "5",
"one:orange": "10",
"two:apple": "6",
"two:orange": "11"
}
and your desired JSON is:
[
["one","5","10"],
["two","6","11"]
]
Then you can iterate over the keys of your object and add the values of the elements to another hash with shorter keys, and then convert that new hash to an array of arrays.
Example
let json1 = `{
"one:apple": "5",
"one:orange": "10",
"two:apple": "6",
"two:orange": "11"
}`;
function convert(j) {
let o = JSON.parse(j);
let h = {};
for (let k of Object.keys(o)) {
let n = k.split(':')[0];
if (!h[n]) h[n] = [];
h[n].push(o[k]);
}
let a = Object.keys(h).map(k => [k].concat(h[k]));
return JSON.stringify(a);
}
let json2 = convert(json1);
console.log('json1:', json1);
console.log('json2:', json2);
See: DEMO
Example for Node 0.10
This should work on Node v0.10.x:
var json1 = '{\n' +
' "one:apple": "5",\n' +
' "one:orange": "10",\n' +
' "two:apple": "6",\n' +
' "two:orange": "11"\n' +
'}';
function convert(j) {
var o = JSON.parse(j);
var h = {};
for (var k in o) {
if (o.hasOwnProperty(k)) {
var n = k.split(':')[0];
if (!h[n]) h[n] = [];
h[n].push(o[k]);
}
}
var a = Object.keys(h).map(function (k) {
return [k].concat(h[k]);
});
return JSON.stringify(a);
}
var json2 = convert(json1);
console.log('json1:', json1);
console.log('json2:', json2);
See: DEMO