I want to iterate through a list of items in a synchronous manner and use the result of each step in the next step. I can someone correct/suggest the code logic which I am using?
const async = require('async')
async.eachSeries([1, 2, 3, 4, 5],
function downloadChunk (chunkID, asyncCallback) {
console.log(chunkID)
const result = `This is a result from ${chunkID} call and should be used somewhere in ${chunkID + 1}`
// How should I pass this result to next step
asyncCallback()
},
function complete (err) {
if (err) console.log('Error: ' + err)
console.log('this is the end. All the variables have been used')
}
)
You can simply create a variable outside the async.eachSeries like so:
const async = require('async')
var result = null;
async.eachSeries([1, 2, 3, 4, 5],
function downloadChunk (chunkID, asyncCallback) {
console.log(chunkID)
console.log('Result from previous call', result);
// reassign new value to the result
result = `This is a result from ${chunkID} call and should be used somewhere in ${chunkID + 1}`
asyncCallback()
},
function complete (err) {
if (err) console.log('Error: ' + err)
console.log('this is the end. All the variables have been used')
}
)