react-smtc-ui-utils/es/static/ObjectsUtils.js

react-smtc-ui-utils React component

/**
 * Empty checks
 * generate random numbers
 *  ...
 * @Author Rocky
 */

// check string empty or not
export function isStringEmpty(String) {
  if (String === undefined || String === null || String === '') {
    return true;
  } else {
    return false;
  }
}

//generate a random number by given bit
export function getRandomNumber(bit) {
  if (bit === undefined) {
    bit = 100000000;
  }
  return Math.ceil(Math.random() * Math.floor(bit));
}

//check an Array empty or not
export function isArrayEmpty(arr) {
  if (arr === undefined || arr === null || arr.length <= 0) {
    return true;
  } else {
    return false;
  }
}

// Speed up calls to hasOwnProperty
var hasOwnProperty = Object.prototype.hasOwnProperty;

// check Object empty or not
export function isObjEmpty(obj) {
  // null and undefined are "empty"
  if (obj == null) return true;

  // Assume if it has a length property with a non-zero value
  // that that property is correct.
  if (obj.length > 0) return false;
  if (obj.length === 0) return true;

  // If it isn't an object at this point
  // it is empty, but it can't be anything *but* empty
  // Is it empty?  Depends on your application.
  if (typeof obj !== "object") return true;

  // Otherwise, does it have any properties of its own?
  // Note that this doesn't handle
  // toString and valueOf enumeration bugs in IE < 9
  for (var key in obj) {
    if (hasOwnProperty.call(obj, key)) return false;
  }
  return true;
}