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Improve arrayToCSV to escape quotes in strings and un-quote numeric values.

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This commit is contained in:
Dan Howe
2019-03-18 23:16:19 +10:00
parent 9fbb61c79c
commit 74e212fb9a
2 changed files with 5 additions and 1 deletions
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3
snippets/arrayToCSV.md
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@ -8,10 +8,11 @@ Omit the second argument, `delimiter`, to use a default delimiter of `,`.
```js ```js
const arrayToCSV = (arr, delimiter = ',') => const arrayToCSV = (arr, delimiter = ',') =>
arr.map(v => v.map(x => `"${x}"`).join(delimiter)).join('\n'); arr.map(v => v.map(x => isNaN(x) ? `"${x.replace(/"/g, '""')}"` : x ).join(delimiter)).join('\n');
``` ```
```js ```js
arrayToCSV([['a', 'b'], ['c', 'd']]); // '"a","b"\n"c","d"' arrayToCSV([['a', 'b'], ['c', 'd']]); // '"a","b"\n"c","d"'
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'
``` ```

3
test/arrayToCSV.test.js
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@ -10,3 +10,6 @@ test('arrayToCSV works with default delimiter', () => {
test('arrayToCSV works with custom delimiter', () => { test('arrayToCSV works with custom delimiter', () => {
expect(arrayToCSV([['a', 'b'], ['c', 'd']], ';')).toBe('"a";"b"\n"c";"d"'); expect(arrayToCSV([['a', 'b'], ['c', 'd']], ';')).toBe('"a";"b"\n"c";"d"');
}); });
test('arrayToCSV escapes quotes and doesn\'t quote numbers', () => {
expect(arrayToCSV([['a', '"b" great'], ['c', 3.1415]])).toBe('"a","""b"" great"\n"c",3.1415');
});