Javascript如何更改JavaScript数组格式？

Question

I am creating a file upload operation where I'll retrieve content of file and perform some function with them.

I ask users to enter data in the format below in an excel sheet and save the excel file as a CSV file.

Then I use this function to read an display the file content.

    var fileInput = document.getElementById("csv");

      readFile = function () {

              console.log("file uploaded");
              var reader = new FileReader();
              reader.onload = function () {
            reader.readAsBinaryString(fileInput.files[0]);
            };
            }
            if (fileInput){
                fileInput.addEventListener('change', readFile);
            }

the function output this image.

what I have not been able to figure out is how do I convert and arrange from the file output format to the desired output format.

var numbers = [75799757,9744710,79989647,99029704,];

Answer 1

 var numbers = [75799757,9744710,79989647,99029704]; var str=""; numbers.forEach(function(number){ str += number + ", "; }); var newStr = str.substring(0, str.length-2); document.write(newStr);