I am trying to create a JSON object in javascript (node-red) in this format:
gaugeData.channel.degrees:
gaugeData = {
ch1: {10: 'value',
20: 'value',
...
360: 'value'}
ch2: {10: 'value',
20: 'value',
...
360: 'value'}
...
ch8: {10: 'value',
20: 'value',
...
360: 'value'}
So that is a JSON object: "gaugeData" will have 8 properies called "channel" and each channel has 36 properties called, 10, 20 ,30 ,40 ... 360.
So far I have tried:
for(var i = 1; i <= 8; i ){
for(var c = 10; c <= 360; c = 10){
var channels = {
[i]: {
[c]: randInt(),
}
}
flow.set("gaugeData", channels);
}
}
This gives me:
{"8":
{"360":250}
}
So i can see my loop is working, though no matter what i cannot get each elemnet to append to the "gaugeData" object. It is only storing the last iteration of the loop. I have tried gaugeData.append, and gaugeData.push, but having similar no good results there.
What method should i use to append each iteration to the gaugeData object?
CodePudding user response：
You basically have it, just store the values in a parent object before calling the next iteration of each for loop. Example:
const createChannels = () =>{
const topObj = {}
for(let i = 1; i <= 8; i ){
const botObj = {}
for(let c = 10; c <= 360; c = 10){
botObj[c] = Math.floor(Math.random() * 10)
}
topObj[i] = botObj
}
return topObj
}
const myChannels = createChannels()
console.log(myChannels)
Returns:
{
'1': {
'10': 8,
'20': 4,
'30': 3,
'40': 4,
'50': 8,
'60': 0,
'70': 4,
'80': 4,
'90': 7,
'100': 0,
'110': 2,
'120': 3,
'130': 1,
'140': 1,
'150': 5,
'160': 1,
'170': 0,
'180': 6,
'190': 7,
'200': 7,
'210': 5,
'220': 2,
'230': 2,
'240': 9,
'250': 7,
'260': 0,
'270': 1,
'280': 5,
'290': 1,
'300': 4,
'310': 4,
'320': 9,
'330': 2,
'340': 2,
'350': 6,
'360': 5
},
'2': {
'10': 6,
'20': 5,
'30': 5,
'40': 2,
'50': 9,
'60': 2,
'70': 9,
'80': 7,
'90': 0,
'100': 9,
'110': 1,
'120': 8,
'130': 0,
'140': 9,
'150': 3,
'160': 7,
'170': 6,
'180': 5,
'190': 5,
'200': 5,
'210': 7,
'220': 9,
'230': 2,
'240': 7,
'250': 0,
'260': 8,
'270': 1,
'280': 2,
'290': 8,
'300': 7,
'310': 1,
'320': 0,
'330': 6,
'340': 0,
'350': 6,
'360': 8
},
'3': {
'10': 4,
'20': 2,
'30': 5,
'40': 8,
'50': 1,
'60': 2,
'70': 0,
'80': 3,
'90': 9,
'100': 5,
'110': 3,
'120': 8,
'130': 6,
'140': 7,
'150': 7,
'160': 0,
'170': 8,
'180': 7,
'190': 6,
'200': 9,
'210': 5,
'220': 2,
'230': 0,
'240': 1,
'250': 3,
'260': 5,
'270': 5,
'280': 3,
'290': 0,
'300': 1,
'310': 1,
'320': 8,
'330': 0,
'340': 2,
'350': 6,
'360': 4
},
'4': {
'10': 7,
'20': 6,
'30': 2,
'40': 5,
'50': 1,
'60': 8,
'70': 1,
'80': 1,
'90': 2,
'100': 2,
'110': 1,
'120': 5,
'130': 5,
'140': 4,
'150': 1,
'160': 6,
'170': 2,
'180': 7,
'190': 3,
'200': 0,
'210': 8,
'220': 7,
'230': 2,
'240': 7,
'250': 1,
'260': 5,
'270': 3,
'280': 1,
'290': 1,
'300': 9,
'310': 8,
'320': 7,
'330': 1,
'340': 9,
'350': 7,
'360': 1
},
'5': {
'10': 7,
'20': 3,
'30': 4,
'40': 4,
'50': 2,
'60': 9,
'70': 1,
'80': 3,
'90': 9,
'100': 9,
'110': 6,
'120': 5,
'130': 9,
'140': 6,
'150': 0,
'160': 1,
'170': 0,
'180': 6,
'190': 8,
'200': 4,
'210': 5,
'220': 5,
'230': 4,
'240': 1,
'250': 4,
'260': 2,
'270': 7,
'280': 0,
'290': 1,
'300': 5,
'310': 0,
'320': 2,
'330': 2,
'340': 3,
'350': 3,
'360': 6
},
'6': {
'10': 9,
'20': 4,
'30': 9,
'40': 9,
'50': 0,
'60': 7,
'70': 1,
'80': 1,
'90': 4,
'100': 0,
'110': 3,
'120': 1,
'130': 1,
'140': 3,
'150': 9,
'160': 4,
'170': 4,
'180': 8,
'190': 9,
'200': 2,
'210': 6,
'220': 5,
'230': 6,
'240': 0,
'250': 7,
'260': 3,
'270': 9,
'280': 3,
'290': 7,
'300': 8,
'310': 5,
'320': 3,
'330': 4,
'340': 1,
'350': 3,
'360': 7
},
'7': {
'10': 0,
'20': 7,
'30': 9,
'40': 2,
'50': 6,
'60': 5,
'70': 6,
'80': 6,
'90': 0,
'100': 8,
'110': 3,
'120': 7,
'130': 0,
'140': 9,
'150': 8,
'160': 0,
'170': 9,
'180': 1,
'190': 9,
'200': 3,
'210': 6,
'220': 1,
'230': 3,
'240': 1,
'250': 6,
'260': 6,
'270': 3,
'280': 7,
'290': 4,
'300': 2,
'310': 4,
'320': 5,
'330': 2,
'340': 0,
'350': 1,
'360': 3
},
'8': {
'10': 4,
'20': 1,
'30': 5,
'40': 3,
'50': 3,
'60': 9,
'70': 4,
'80': 3,
'90': 7,
'100': 2,
'110': 5,
'120': 8,
'130': 4,
'140': 7,
'150': 8,
'160': 3,
'170': 1,
'180': 2,
'190': 5,
'200': 6,
'210': 2,
'220': 2,
'230': 5,
'240': 5,
'250': 1,
'260': 1,
'270': 7,
'280': 8,
'290': 7,
'300': 8,
'310': 3,
'320': 9,
'330': 7,
'340': 2,
'350': 9,
'360': 5
}
}
CodePudding user response：
The channels varaible you have written is initializing everytime the inner loop runs and you are assigning that to gaugeData. So, you will only get the last initialized value.
I have modified the implementation a little bit. Attaching the code for your reference.
for(var i = 1; i <= 8; i ){
let channels = [];
for(var c = 10; c <= 360; c = 10){
var channel = {
[i]: {
[c]: randInt(),
}
}
channels.push(channel);
}
flow.set("gaugeData", channels);
}