Capitalize each word in a string

capitalize('foo') // 'Foo'
capitalize('BAR BAZ') // 'Bar Baz'

Compose functions

const addOne = x => x + 1
const addThree = compose(addOne, addOne, addOne)

addThree(3) // 6

Curry a function

const add = (x, y) => x + y
const addTwo = curry(add, 2)
addTwo(4) // 6

Debounce function invocations

function log() { console.log('hi') }
const debouncedLog = debounce(log)
debouncedLog()
debouncedLog()
debouncedLog() // Hi

Iterates over elements returning an array of all elements predicate returns truthy

const items = [1, 2, 3, 4]
const isMoreThanTwo = x => x > 2

filter(isMoreThanTwo)(items) // [3, 4]
filter(isMoreThanTwo, items) // [3, 4]

Flattens array

flatten([1, [2, 3]]) // [1, 2, 3]

Get a nested object property using dot notation

Check if nested key exists in a object

Check if value is a array

isArr([]) // true
isArr(1) // false

Check if value is boolean

isBool(true) // true
isBool(false) // true
isBool(1) // false

Check if string, object or array empty

Check if value is error

isErr(new Error('example')) // true
isErr('example') // false

Check if one or more values are functions

import isFunc from 'nova-is-func'
isFunc(() => {}) // true
isFunc(false) // false

Check if one or more values are integers

import isInt from 'nova-is-num'
isInt(1) // true
isInt(1, 2, 3) // true
isInt(1.1) // false

Check if one or more values are numbers

Check if value is object

Check if

Performs no operation

import noop from 'nova-noop'
console.log(noop()) // undefined

Get a random integer in range

Randomize items in array

JS version of Python range function. Based on https://stackoverflow.com/a/8273091/7027045

Sort array by object property

Throttle a function's invocation