hoelzro / elm-jargon

A repository of terminology used by the Elm community.

Elm Jargon File

This is a repository for tracking the jargon used by the Elm community.

Constructor

Used to indicate one of the "branches" of a data type. For example, the Maybe type looks like this:

type Maybe a = Just a | Nothing

Just and Nothing are constructors for the Maybe type.

Sometimes referred to as tags.

Currying

A function is curried if it takes a single argument and returns another function. For example, a binary add function would take an argument, and return another function, which, when given its own argument, would add it to the first argument and yield the result. It would look like this in JavaScript:

function add(a) {
    return function(b) {
        return a + b;
    };
}

All Elm functions are curried.

Tag

See also Constructor.

TEA

The Elm Architecture