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Dhall Configuration Language VS TOML

Compare Dhall Configuration Language VS TOML and see what are their differences

Dhall Configuration Language logo Dhall Configuration Language

A non-repetitive alternative to YAML

TOML logo TOML

TOML - Tom's Obvious, Minimal Language
  • Dhall Configuration Language Landing page
    Landing page //
    2022-04-27
  • TOML Landing page
    Landing page //
    2023-10-22

Dhall Configuration Language features and specs

  • Deterministic
    Dhall is designed to be a deterministic configuration language, meaning that given the same input, it will always produce the same output. This ensures consistency and repeatability across environments.
  • Type-Safe
    Dhall includes a strong static type system, preventing many common errors associated with misconfigurations. Types are checked at compile time, ensuring configuration values meet specific criteria before deployment.
  • Total Programming Language
    Unlike many other configuration languages, Dhall is a total functional programming language, which means every program written in Dhall will terminate. This prevents infinite loops and other runtime issues.
  • Interoperability
    Dhall can generate JSON, YAML, and other data interchange formats, making it highly interoperable with existing systems that require these formats for configuration.
  • Modular
    Dhall allows for modular configuration files. You can define reusable components and import them across different configurations, promoting DRY (Don't Repeat Yourself) principles.

Possible disadvantages of Dhall Configuration Language

  • Learning Curve
    While Dhall is designed to be simple, the presence of a type system and functional programming concepts can present a learning curve to new users, especially those without a programming background.
  • Tooling Support
    Compared to more established languages, Dhall has less tooling support. Users might find fewer IDE extensions, plugins, or community libraries to assist in development.
  • Limited Ecosystem
    Being relatively new, Dhall has a smaller ecosystem that may lack the breadth of community contributions, such as templates and integration examples, found in more mature configuration languages.
  • Performance Overhead
    The type checking and interpretation of Dhall can introduce some performance overhead compared to more traditional configuration formats like JSON or YAML, which are simpler to parse.
  • Complexity for Simple Configurations
    For simple configurations, the added complexity of Dhall's type system and functional features may be unnecessary, leading to overhead without a clear benefit.

TOML features and specs

  • Human Readable
    TOML is designed to be easy to read and write due to its simplistic syntax, which is intuitive for humans.
  • Explicit Data Types
    TOML supports various data types including integers, floats, strings, dates, and arrays, which helps in expressing configurations precisely.
  • Hierarchical Configuration
    Allows for nested key-value pairs through its table and array of tables structures, providing a clear way to represent hierarchical data.
  • Standardized Specification
    TOML is guided by a well-defined specification which ensures consistency across different implementations.
  • Lightweight
    It is a minimal and straightforward format that doesn’t require much overhead compared to some other configuration formats.

Possible disadvantages of TOML

  • Limited Complex Data Structures
    TOML is not suited for highly complex data structures, which might make it less ideal for certain advanced configurations.
  • Lacks Scalability Features
    With limited support for advanced features such as conditional configuration or dynamic data, it might not scale well for very large configurations.
  • Not as Widely Adopted
    Compared to formats like JSON or YAML, TOML may have less community support and fewer libraries and tools available across various programming environments.
  • No Native Implementation in Some Languages
    Certain programming environments do not offer native TOML parsing support, requiring third-party libraries which might affect performance or security.

Dhall Configuration Language videos

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TOML videos

JuliaCon 2019 | Pkg, Project.toml, Manifest.toml and Environments | Fredrik Ekre

More videos:

  • Review - TOML Decoder: The Beginning

Category Popularity

0-100% (relative to Dhall Configuration Language and TOML)
Configuration Management
70 70%
30% 30
Software Development
66 66%
34% 34
Developer Tools
64 64%
36% 36
Blogging
100 100%
0% 0

User comments

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Social recommendations and mentions

Based on our record, Dhall Configuration Language should be more popular than TOML. It has been mentiond 91 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Dhall Configuration Language mentions (91)

  • Any program can be a GitHub Actions shell
    I'll give a shot at some guiding principals: 1. Do not use yaml. All github action logic should be written in a language that compiles to yaml, for example dhall (https://dhall-lang.org/). Yaml is an awful language for programmers, and it's a worse language for non-programmers. It's good for no one. 2. To the greatest extent possible, do not use any actions which install things. For example, don't use... - Source: Hacker News / 26 days ago
  • StrictYAML
    I'm a fan of anything that moves us away from stringly typed nonsense. See also Dhall (which can render to yaml). I like the idea but found the veneer broke a little too often and left me squinting at Haskell. https://dhall-lang.org/. - Source: Hacker News / about 2 months ago
  • Some Programming Language Ideas
    I think you're asking for Starlark (https://starlark-lang.org), a language that strongly resembles Python but isn't Turing-complete, originally designed at Google for use in their build system. There's also Dhall (https://dhall-lang.org), which targets configuration use cases; I'm less familiar with it. One problem is that, while non-Turing-completeness can be helpful for maintainability, it's not really... - Source: Hacker News / 4 months ago
  • 8 months of OCaml after 8 years of Haskell in production
    > Lambda calculus is as pure as can be, and also has terms that don't normalize. That is not considered a side effect. Many typed lambda calculi do normalise. You can also have a look https://dhall-lang.org/ for some pragmatic that normalises. > A better example of impurity in Haskell for pragmatic's sake is the trace function, that can be used to print debugging information from pure functions. Well, but that's... - Source: Hacker News / 5 months ago
  • Thoughts on ThoughtWorks Radar 2024
    I was first turned onto Pkl during my Dhall Trough of Disillusionment phase (Dhall is cool, but man is it hard) by James Ward. It looked to be a language that had enough types to compile YAML/JSON configuration files wayyyy more safely. I’ve had enough YAML/JSON misconfigurations break production, that I started looking into ways to compile those problems away, and Dhall helped a lot, but the learning curve and... - Source: dev.to / 6 months ago
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TOML mentions (11)

  • Let's meet Black: Python Code Formatting
    Black uses by default the pyproject.toml file. This file contains a section for each different tool we want to use. The use of a configuration file like pyproject.toml is quite a good choice and helps the contributors to use the same tools and configurations you're using. - Source: dev.to / over 1 year ago
  • ML Configuration Management
    Accessing the rest of the relevant variables is based on the various sections in the toml file. For example, referencing the Production Service Account (SA) will be by accessing the SERVICE_ACCOUNT variable which is under the [prd] section. - Source: dev.to / almost 3 years ago
  • Get good Git info from Hugo
    In your project config file, set enableGitInfo to true (here, I’m showing the Hugo default of TOML, although my own config file is actually YAML):. - Source: dev.to / almost 3 years ago
  • json, please...
    For config file use case I cannot recommend enough TOML. Source: about 3 years ago
  • Turn Visual Studio Code Into A Top-Notch JavaScript IDE With These 25 Extensions
    TOML is a configuration file format that aims to be simple and easily readable. The Even Better TOML extension adds full editor support, including syntax highlighting, folding, navigation, and formatting. - Source: dev.to / over 3 years ago
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What are some alternatives?

When comparing Dhall Configuration Language and TOML, you can also consider the following products

YAML - YAML 1.2 --- YAML: YAML Ain't Markup Language

JSON - (JavaScript Object Notation) is a lightweight data-interchange format

Jsonnet - A powerful DSL for elegant description of JSON data.

Messagepack - An efficient binary serialization format.

Medium - Welcome to Medium, a place to read, write, and interact with the stories that matter most to you.

Protocol Buffers - A method for serializing and interchanging structured data.