Task-Oriented Guides

Markdown → HTML

Convert a Markdown file to a standalone HTML page.

lambda convert readme.md -t html -o readme.html

JSON → YAML

Convert JSON data to YAML format.

lambda convert data.json -t yaml -o data.yaml

YAML → JSON

Convert YAML configuration to JSON.

lambda convert config.yaml -t json -o config.json

LaTeX → HTML

Convert LaTeX documents to styled HTML.

lambda convert paper.tex -t html -o paper.html --full-document

XML → JSON

Parse XML into the Lambda tree and output as JSON.

lambda convert data.xml -f xml -t json -o data.json

CSV → JSON

Convert CSV tabular data to structured JSON.

lambda convert data.csv -t json -o data.json

Validate JSON with a schema

Define a schema and validate JSON files against it.

// schema.ls
type User = {
    name: string,
    age: int that (0 <= ~ <= 150),
    email: string?
}

lambda validate users.json -s schema.ls

Validate HTML5

HTML files are validated against the built-in HTML5 schema automatically.

lambda validate page.html

Strict YAML validation

Strict mode: all optional fields must be present or null.

lambda validate config.yaml -s config_schema.ls --strict

HTML → SVG

Render an HTML page to SVG output.

lambda render page.html -o output.svg

HTML → PDF

Render an HTML page to a PDF document.

lambda render page.html -o output.pdf

HTML → Screenshot (PNG)

Take a high-DPI screenshot of an HTML page.

lambda render page.html -o screenshot.png \
    -vw 1920 -vh 1080 --pixel-ratio 2.0

Mermaid → SVG

Render a Mermaid diagram to SVG with a dark theme.

lambda render diagram.mmd -o diagram.svg -t github-dark

Interactive viewer

Open any document in the native viewer window.

lambda view page.html
lambda view readme.md
lambda view https://example.com

Filter and sort JSON data

Use pipes and for-expressions to query JSON files.

// filter_users.ls
let users = input("users.json", 'json')

// Active users, sorted by age, top 10
for (u in users
     where u.active
     order by u.age desc
     limit 10)
  {name: u.name, age: u.age}

lambda filter_users.ls

Extract images from Markdown

Query the document tree for all image elements.

// images.ls
let doc = input("readme.md", 'markdown')
doc?<img> | ~.src

lambda images.ls

Batch CSV → JSON with filtering

Read CSV, filter rows, and output as JSON.

// csv_filter.ls
let data = input("sales.csv", 'csv')
let big = data that ~.amount > 1000
format(big, 'json')

lambda csv_filter.ls