如何在解决promise之前确保将所有数据都推送到阵列？

Question

Here is my code:

let promise = new Promise(( resolve, reject ) => {
            let dataArray: Array<Object> = [];
            d3.csvParse(csvData, ( data, error ) => {
                if ( error ) reject('error occurred while parsing csv');
                dataArray.push(data);
            });
            resolve(dataArray);
        });

I am using d3 to parse the csv file that is fetched from the server. What I am basically trying to do is make sure the parsing is done before returning the promise/object, so I pass it to another function (not shown here). Thank you

Answer 1

I have read the documentation of csvParse and you can simple change your code with this

dataArray=d3.csvParse(csvData);
resolve(dataArray);

You don't need to add every row to array into the function because the csvParse will return an array when it finishes to parse