Trying to understand the different steps to the Promise implementation for D3 js.
Have two input files and promise them all:
Promise.all([jsonFile, txtFile]).then(input)
The array has been consolidated into one individual input, which might be called as a one-parameter function like:
function input(data) { console.log(data[0]) // json console.log(data[1]) // txt }
Imagine I want to implement the second function as a two-parameter with the two inputs like function input(json, txt)
. What should happen in the then()
statement to make the code do so?
Thanks
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Answer
If you want to implement input
function with two parameters:
function input(json, txt) { // omitted }
then you can use rest parameters [more]:
Promise.all([jsonFile, txtFile]) .then((data) => input(...data))
or you can be more explicit:
Promise.all([jsonFile, txtFile]) .then(([json, txt]) => input(json, txt))