Taydash

Description

A collection of utility functions and types which have proved useful, and are lacking from other utility libraries. Strives to maintain functional programming best practises where possible.

Usage

npm i taydash

Curried vs Uncurried Functions

Each exported function of this library is curried by default.

For convenience, each curried function will have a corresponding uncurried function, prefixed with _.

For example:

const addOne = (num) => num + 1
const curried = mapLeafNodes(addOne)(1)
const uncurried = _mapLeafNodes(addOne, 1)
const sameResult = curried === uncurried
console.log(sameResult)
// true

Highlights

mapLeafNodes

• Iterates over a JSONValue (JSON style object, array, or primitive) and applies a passed function to each leaf node of the value.

const addOne = (num) => num + 1
const result = mapLeafNodes(addOne)({ num: 0, arr: [1, 2, 3] })
console.log(result)
// { num: 1, arr: [ 2, 3, 4 ] }

roundIfNum

• Rounds a value to a specified number of decimal places, if the input is a number. Returns the value otherwise.
• decimalPlaces argument must be between 0 and 20, inclusive. If this constraint is violated, the function returns null.

const numResult = roundIfNum(2)(1.459)
console.log(numResult)
// 1.46
const strResult = roundIfNum(2)('hello')
console.log(strResult)
// 'hello'
const nullResult = roundIfNum(-1)(1.459)
console.log(nullResult)
// null