convert string array to integer array

Question

var arrayOfNumbers = arrayOfStrings.map(Number);

Strings in the console are symbolized by wrapping them in quotes. By that fact, we can assume that i is a string. Convert it to an integer and it will no longer be a string and no longer have those quotes.

endFlowArray.push(+i);

Your "numbers" in flowEnd and dateFlow are actually strings, not numbers.

To convert entire array's data type we can use map():

let numberArray = stringArray.map(Number)

try this:

let numberArray = stringArray.map(el=>parseInt(el))