Converts a 2D array to a comma-separated values (CSV) string.
Use Array.prototype.map()
and Array.prototype.join(delimiter)
to combine individual 1D arrays (rows) into strings.
Use Array.prototype.join('\n')
to combine all rows into a CSV string, separating each row with a newline.
Omit the second argument, delimiter
, to use a default delimiter of ,
.
代码片段
const arrayToCSV = (arr, delimiter = ',') =>
arr
.map(v => v.map(x => (isNaN(x) ? `"${x.replace(/"/g, '""')}"` : x)).join(delimiter))
.join('\n');
使用样例
arrayToCSV([['a', 'b'], ['c', 'd']]); // '"a","b"\n"c","d"'
arrayToCSV([['a', 'b'], ['c', 'd']], ';'); // '"a";"b"\n"c";"d"'
arrayToCSV([['a', '"b" great'], ['c', 3.1415]]); // '"a","""b"" great"\n"c",3.1415'