Async for loop nodeJS - node.js

Question

I have a simple for loop containing an async function, my problem is that the loop goes through all the values, then only executes the async function inside.
for(key in splitedDataArray){
calculatePower(splitedDataArray[key]);
var octopusMAC = getOctopusIDFromRaw(splitedDataArray[key]);
var channelID = getChannelIDFromRaw(splitedDataArray[key]);
console.log("outside")
getChannelCTSize(octopusMAC, channelID, function (result) {
console.log("inside")
var timestamp = convertDateTimeToInt(transmission.date);
var adcTicks = getAdcTicksFromRaw(splitedDataArray[key]);
var power = convertAdcTicksToAmps(parseInt(adcTicks, 16), result);
console.log("channelID: " + channelID + " ADC ticks HEX: " + adcTicks + " timestamp: " + timestamp + " power for " + result + "A CT Size: " + power);
});
}
So it prints outside for every element in the array then it only prints inside after all of the outised's, I want to have an outside then and inside and so on. I have looked at https://www.promisejs.org/ but I am not sure on how to implement this with my code.

Answer 1

You can use lodash.eachSeries but it is not best solution. If i were you i would try to move everything inside of for loop into a function so you will have all variables visible inside.
More like this:
function calculate(value){
calculatePower(value);
var octopusMAC = getOctopusIDFromRaw(value);
var channelID = getChannelIDFromRaw(value);
console.log("outside")
getChannelCTSize(octopusMAC, channelID, function (result) {
console.log("inside")
var timestamp = convertDateTimeToInt(transmission.date);
var adcTicks = getAdcTicksFromRaw(value);
var power = convertAdcTicksToAmps(parseInt(adcTicks, 16), result);
console.log("channelID: " + channelID + " ADC ticks HEX: " + adcTicks + " timestamp: " + timestamp + " power for " + result + "A CT Size: " + power);
});
}
for(key in splitedDataArray){
calc(splitedDataArray[key]);
}
It will not print out: out/in/out/in, but will get good values in each loop.
If you require that order /out/in/out/in i would go for eachSeries from lodash.