Catalog app · RISC-V VM

Run hck in the browser

A cut replacement that splits on regex delimiters and can reorder fields.

Try it live

Nothing is downloaded until you press Run.

catalog app

Reorder CSV columns

Installs hck 0.11.6 from the signed catalog (every chunk is verified before it is written), then runs the commands below in the VM's shell.

bash

hck --version
hck -d, -D, -f3,1 data.csv

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Expected output

$ hck --version
hck git:v0.11.6-modified
$ hck -d, -D, -f3,1 data.csv
lang,id
rust,1
go,2

What it is

hck selects columns like cut, but its delimiter can be a regex (whitespace by default), fields can be selected by header name, and they come out in the order you list them. In the browser it is a fast column extractor for CSV and log data in client-side pipelines.

Package facts

version: 0.11.6
runs on: RISC-V VM (elf-app, riscv64gc-linux-musl)
download: 1.2 MB compressed · 1 file
command: hck
requires: nothing else — a static binary
license: Unlicense OR MIT (upstream)
upstream: github.com/sstadick/hck
categories: Data, Text
catalog: generation 12, Ed25519-signed

Install and run it from your page

With the SDK, installApp resolves hck in the signed index, fetches its content-addressed chunks from the CDN, verifies each one and writes the files into the VM. Details in Installing catalog apps.

javascript

import { createNano } from "@userland-run/nano-sdk";

const nano = await createNano({ image: { wasm: "/nano/console.wasm" }, ramMB: 512 });
await nano.installApp("hck"); // signature-verified, cached in OPFS

const r = await nano.shExec("hck --version");
console.log(r.stdout);

Typical usage of the upstream command-line tool: