Solid Primitives Utilities is a support and helper package for a number of primitives in our library. Please free to augment or centralize useful utilities and methods in this package for sharing.

npm install @solid-primitives/utils
# or
pnpm add @solid-primitives/utils
# or
yarn add @solid-primitives/utils

Functional programming helpers for making non-mutating changes to data. Keeping it immutable. Useful for updating signals.

import { pick } from "@solid-primitives/utils/immutable";

const original = { foo: 123, bar: "baz" };
const newObj = pick(original, "foo");
original; // { foo: 123, bar: "baz" }
newObj; // { foo: 123 }

Use it for changing signals:

import { push, update } from "@solid-primitives/utils/immutable";

const [list, setList] = createSignal([1, 2, 3]);
setList(p => push(p, 4));

const [user, setUser] = createSignal({
  name: "John",
  street: { name: "Kingston Cei", number: 24 },
});
setUser(p => update(p, "street", "number", 64));

• shallowArrayCopy - make shallow copy of an array
• shallowObjectCopy - make shallow copy of an object
• shallowCopy - make shallow copy of an array/object
• withArrayCopy - apply mutations to the an array without changing the original
• withObjectCopy - apply mutations to the an object without changing the original
• withCopy - apply mutations to the an object/array without changing the original

• push - non-mutating Array.prototype.push()
• drop - non-mutating function that drops n items from the array start
• dropRight - non-mutating function that drops n items from the array end
• filterOut - standalone Array.prototype.filter() that filters out passed item
• filter - standalone Array.prototype.filter()
• sort - non-mutating Array.prototype.sort() as a standalone function
• sortBy - Sort an array by object key, or multiple keys
• map - standalone Array.prototype.map() function
• slice - standalone Array.prototype.slice() function
• splice - non-mutating Array.prototype.splice() as a standalone function
• fill - non-mutating Array.prototype.fill() as a standalone function
• concat - Creates a new array concatenating array with any additional arrays and/or values.
• remove - Remove item from array
• removeItems - Remove multiple items from an array
• flatten - Flattens a nested array into a one-level array
• filterInstance - Flattens a nested array into a one-level array
• filterOutInstance - Flattens a nested array into a one-level array

• omit - Create a new subset object without the provided keys
• pick - Create a new subset object with only the provided keys
• split - Split object into multiple subset objects.
• merge - Merges multiple objects into a single one.

• get - Get a single property value of an object by specifying a path to it.
• update - Change single value in an object by key, or series of recursing keys.

• add - a + b + c + ... (works for numbers or strings)
• substract - a - b - c - ...
• multiply - a * b * c * ...
• divide - a / b / c / ...
• power - a ** b ** c ** ...
• clamp - clamp a number value between two other values

See CHANGELOG.md