#csv code explainers

go

func (h *ReportHandler) ExportTransactions(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()
 
	from, to, err := parseDateRange(r.URL.Query())

Streaming a CSV export in Go

streaming http csv

Intermediate 8 steps

javascript

import { NextResponse } from 'next/server';
import { db } from '@/lib/db';
 
function csvCell(value) {

Streaming a CSV export in a Next.js route

streaming csv readablestream

Advanced 9 steps

ruby

require "csv"
 
class CsvExporter
  def initialize(records, columns: nil)

Turning records into CSV in Ruby

csv data-export serialization

Intermediate 7 steps

typescript

type CsvRecord = Record<string, string>;
 
function parseCsv(input: string): CsvRecord[] {
  const rows: string[][] = [];

Parsing CSV with a character state machine

state-machine parsing string-processing

Intermediate 8 steps

python

import csv
from pathlib import Path

Splitting a large CSV into smaller files

file-io streaming csv

Intermediate 8 steps

rust

use std::error::Error;
use std::path::Path;
 
use serde::Deserialize;

Custom CSV deserialization with serde in Rust

serde csv deserialization

Intermediate 7 steps

python

import csv
import io
from datetime import datetime

Streaming a CSV export in Flask

streaming generators csv

Intermediate 9 steps

python

import csv
import io
from datetime import date

Streaming a CSV export in FastAPI

streaming async-generators csv

Advanced 8 steps