26 lines
966 B
Markdown
26 lines
966 B
Markdown
---
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title: CSVToArray
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tags: string,array,intermediate
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---
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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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