8ee50178f3
Correct: `Array.from()` (it’s a static method) Incorrect: `Array.join()` (doesn’t exist; it’s a prototype method) This patch uses the common `#` syntax to denote `.prototype.`.
23 lines
906 B
Markdown
23 lines
906 B
Markdown
### CSVToArray
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Converts a comma-separated values (CSV) string to a 2D array.
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Use `Array.prototype.slice()` and `Array.prototype.indexOf('\n')` to remove the first row (title row) if `omitFirstRow` is `true`.
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Use `String.prototype.split('\n')` to create a string for each row, then `String.prototype.split(delimiter)` to separate the values in each row.
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Omit the second argument, `delimiter`, to use a default delimiter of `,`.
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Omit the third argument, `omitFirstRow`, to include the first row (title row) of the CSV string.
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```js
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const CSVToArray = (data, delimiter = ',', omitFirstRow = false) =>
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data
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.slice(omitFirstRow ? data.indexOf('\n') + 1 : 0)
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.split('\n')
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.map(v => v.split(delimiter));
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```
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```js
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CSVToArray('a,b\nc,d'); // [['a','b'],['c','d']];
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CSVToArray('a;b\nc;d', ';'); // [['a','b'],['c','d']];
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CSVToArray('col1,col2\na,b\nc,d', ',', true); // [['a','b'],['c','d']];
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```
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