bingo-functional-js/src/Algorithms/Function/isEmpty.js

A port of the PHP bingo-functional library

const isUndefined = require('./isUndefined')
const isFunction = require('./isFunction')
const isNumber = require('./isNumber')
const isString = require('./isString')
const isRegExp = require('./isRegExp')
const isBoolean = require('./isBoolean')
const isNull = require('./isNull')
const isSymbol = require('./isSymbol')
const isError = require('./isError')
const sizeOf = require('../Collection/sizeOf')

/**
 * isEmpty function
 * isEmpty :: a -> Bool
 * @param {*} val
 * @returns {boolean}
 * @example
 *
 * isEmpty({})
 * // => true
 */
const isEmpty = (val) => !(
  val instanceof Date
    || isError(val)
    || isNull(val)
    || isSymbol(val)
    || isBoolean(val)
    || isRegExp(val)
    || isFunction(val)
    || isUndefined(val)
    || (isString(val) && val.length > 0)
    || isNumber(val)
    || sizeOf(val) > 0
)

module.exports = isEmpty