30-seconds-of-code/snippets/CSVToArray.md

CSVToArray

Converts a comma-separated values (CSV) string to a 2D array.

Use Array.slice() and Array.indexOf('\n') to remove the first row (title row) if omitFirstRow is true. Use String.split('\n') to create a string for each row, then String.split(delimiter) to separate the values in each row. Omit the second argument, delimiter, to use a default delimiter of ,. Omit the third argument, omitFirstRow, to include the first row (title row) of the CSV string.

const CSVToArray = (data, delimiter = ',', omitFirstRow = false) =>
  data.slice(omitFirstRow ? data.indexOf('\n')+1 : 0).split('\n').map(v => v.split(delimiter));

CSVToArray('a,b\nc,d'); // [['a','b'],['c','d']];
CSVToArray('a;b\nc;d', ';'); // [['a','b'],['c','d']];
CSVToArray('col1,col2\na,b\nc,d', ',', true); // [['a','b'],['c','d']];