https://github.com/jeremiah-shaulov/deno_csv_file

CSV file reader and writer (seekable, sync/async)
https://github.com/jeremiah-shaulov/deno_csv_file

csv deno

Last synced: about 2 months ago
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CSV file reader and writer (seekable, sync/async)

• Host: GitHub
• URL: https://github.com/jeremiah-shaulov/deno_csv_file
• Owner: jeremiah-shaulov
• Created: 2020-11-25T05:48:30.000Z (about 4 years ago)
• Default Branch: main
• Last Pushed: 2020-11-26T04:01:10.000Z (about 4 years ago)
• Last Synced: 2024-10-28T12:15:49.300Z (2 months ago)
• Topics: csv, deno
• Language: TypeScript
• Homepage: https://deno.land/x/csv_file
• Size: 16.6 KB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# deno_csv_file

CSV file reader and writer for Deno (seekable, sync/async).

[![deno doc](https://doc.deno.land/badge.svg)](https://doc.deno.land/https/deno.land/x/csv_file/mod.ts)

## Example

```typescript

import {CsvFile} from "https://deno.land/x/csv_file/mod.ts";

// 1. Create a new file "/tmp/example-1.csv"

let csv = new CsvFile(await Deno.open('/tmp/example-1.csv', {read: true, write: true, create: true, truncate: true}));

// 2. Write some records

await csv.writeRecord(['Day', 'Month', 'Year']);

await csv.writeRecord(['1', 'January', '2000']);

await csv.writeRecord(['2', 'January', '2000']);

await csv.writeRecord(['3', 'January', '2000']);

// 3. Scroll to the beginning

await csv.seekRecord(0);

// 4. Read the records back

for await (let record of csv)

{	console.log(record);

}

// 5. Now try another way of reading records. So scroll to the beginning again

await csv.seekRecord(0);

// 6. Read and remember a header row

await csv.readHeader();

// 7. Read Map objects with column names taken from header

for await (let record of csv.maps())

{	console.log(record);

}

// 8. Manually read record no. 2, and it's offset in file

await csv.seekRecord(2);

let file_offset = await csv.seek(0, Deno.SeekMode.Current);

let record = await csv.readRecord();

console.log(`Record no. 2 at ${file_offset}:`, record);

// 9. Done

csv.close();

```

Run like this:

```bash

deno run --allow-read --allow-write test.ts

```