export const isEmpty = (value) => {

  if (value == null) {

    return true

  }

  if (isArrayLike(value)) {

    return !value.length

  } else if (isPlainObject(value)) {

    for (let key in value) {

      if (hasOwnProperty.call(value, key)) {

        return false

      }

    }

    return true

  }

  return false

}

export const isArrayLike = (value) => {

  return value != null && isLength(value.length) && !isFunction(value)

}

export const isPlainObject = (obj) => {

  return Object.prototype.toString.call(obj) === '[object Object]'

}

export const isLength = (value) => {

  return typeof value === 'number' && value > - && value %  ===  && value <= Number.MAX_SAFE_INTEGER

}

export const isFunction = (value) => {

  return Object.prototype.toString.call(value) === '[object Function]'

}