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arrayToCSV

TS JS Deno

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 ,.

typescript
const arrayToCSV = (arr: (string | number)[][], delimiter = ",") =>
arr
.map((v) =>
v
.map((x) => (typeof x === "string" ? `"${x.replace(/"/g, '""')}"` : x))
.join(delimiter)
)
.join("\n");
typescript
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'