OCaml Cookbook Recipes

The OCaml Cookbook is a place where OCaml developers share how to solve common tasks using packages from the ecosystem.

A task is something that needs to be done inside a project. A recipe is a code sample and explanations on how to perform a task using a combination of open source libraries. Some tasks can be performed using different combination of libraries, each is a different recipe. Tasks don't describe how to use the standard library or language features.

OCaml developers are warmly invited to contribute categories, tasks, and recipes. See the Cookbook section of the CONTRIBUTING.md file in our GitHub repo.

The OCaml guides are recommend reading, for instance recipes handle errors as described in the Error Handling guide.

Command Line

Task
Opam Packages Used
Parse Command Line Arguments

This task has no recipes yet, maybe you want to contribute a recipe!

Using the ANSI Terminal

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Compilation & Linking

Task
Opam Packages Used
Compile and Link to a Bundled C Library

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Generate OCaml Bindings for a C Library

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Compression

Task
Opam Packages Used
Read a gzip compressed text file

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Decompressing a Tarball

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Compress a Directory Into a Tarball

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Concurrency & Parallelism

Parallelism & Multi-Threading

Task
Opam Packages Used
Spawn a Thread and Receive a Response

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Pass Data Between Parallel Threads

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Single-Threaded Concurrency

Task
Opam Packages Used
Create and Await Promises

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Cryptography

Task
Opam Packages Used
Calculate the SHA-256 Digest of a File

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Sign and Verify a Message with an HMAC Digest

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Salt and Hash a Password with PBKDF2

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Data Structures & Algorithms

Hash Tables

Task
Opam Packages Used
Use a Hash Table With Given Key and Value Types

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Database

PostgreSQL

Task
Opam Packages Used
PostgreSQL CREATE, INSERT, SELECT

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PostgreSQL Aggregate Query

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PostgreSQL Full Text Search

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SQLite

Task
Opam Packages Used
SQLite CREATE, INSERT, SELECT

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SQLite Full Text Search

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Data Formats

JSON

Task
Opam Packages Used
Serialise JSON Data

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Deserialise JSON Data

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CSV

Task
Opam Packages Used
Read Tuples / Records from CSV

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Serialise Tuples / Records to CSV

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Date and Time

Task
Opam Packages Used
Measure Elapsed Time

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Convert a Local Time to Another Time Zone

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Convert Between Date and Unix Timestamp

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Display Formatted Date and Time

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Parse Date and Time from String

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Debugging

Task
Opam Packages Used
Debug Print a Value

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Log a Debug / Error Message to Stdout / Stderr

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Log to the UNIX Syslog

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Encoding

Task
Opam Packages Used
URL- / Percent-Encode a String

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Encode a String as application/x-www-form-urlencoded

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Encode and Decode Bytestrings from Hex-Strings

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Encode and Decode Base64

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Read and Write Integers in Little-Endian Byte Order

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File System

File Paths

There's nothing in this category yet.

Directories

Task
Opam Packages Used
Create Directory

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List Directory Contents

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Get Current Directory

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Change Current Directory

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Find Files Matching a Pattern

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Walk File Tree

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Files

Task
Opam Packages Used
Open File

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Write to a File

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Rename a File

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Delete a File

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Check if a File Exists

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File Size

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Change File Permissions

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Create Temporary File

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Mathematics

Geographical Calculations

Task
Opam Packages Used
Calculate Geodistance Between Two Points

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Vector & Matrix Operations

Task
Opam Packages Used
Matrix Addition and Multiplication

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Invert a Matrix

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Nearest-Neighbour Search

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Operating System

Task
Opam Packages Used

Graphical User Interfaces

There's nothing in this category yet.

Text Processing

Regular Expressions

Task
Opam Packages Used

UTF-8

Task
Opam Packages Used
UTF-8 Text Processing

This task has no recipes yet, maybe you want to contribute a recipe!

Unicode

Task
Opam Packages Used
Collect Unicode Graphemes

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Web Programming

URL and URI processing

Task
Opam Packages Used
Parse a URL from String And Access Individual Parts

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Media Types (MIME)

Task
Opam Packages Used
Get MIME Type from String

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Get MIME Type from Filename

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Parse MIME Type of a HTTP Response

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Running a Web Server

Task
Opam Packages Used
Start a Web Server with a Hello World Endpoint

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Start a Web Server that Serves a HTML Template

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Use Basic Authentication to Secure a Route

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Dealing with HTML

Task
Opam Packages Used
Render a HTML Template

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Extract all Links from a HTML String

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Check a Webpage for Broken Links

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HTTP Clients

Task
Opam Packages Used
Make a HTTP GET Request

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Make a HTTP GET Request with Basic Authentication

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Download a File to a Temporary Directory

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Make a Partial Download with HTTP Range Header

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OCaml

Innovation. Community. Security.