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node_modules/lodash-compat/lang/isEmpty.js 1.2 KB
f7563de62   Palak Handa   first commit
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  var isArguments = require('./isArguments'),
      isArray = require('./isArray'),
      isArrayLike = require('../internal/isArrayLike'),
      isFunction = require('./isFunction'),
      isObjectLike = require('../internal/isObjectLike'),
      isString = require('./isString'),
      keys = require('../object/keys');
  
  /**
   * Checks if `value` is empty. A value is considered empty unless it's an
   * `arguments` object, array, string, or jQuery-like collection with a length
   * greater than `0` or an object with own enumerable properties.
   *
   * @static
   * @memberOf _
   * @category Lang
   * @param {Array|Object|string} value The value to inspect.
   * @returns {boolean} Returns `true` if `value` is empty, else `false`.
   * @example
   *
   * _.isEmpty(null);
   * // => true
   *
   * _.isEmpty(true);
   * // => true
   *
   * _.isEmpty(1);
   * // => true
   *
   * _.isEmpty([1, 2, 3]);
   * // => false
   *
   * _.isEmpty({ 'a': 1 });
   * // => false
   */
  function isEmpty(value) {
    if (value == null) {
      return true;
    }
    if (isArrayLike(value) && (isArray(value) || isString(value) || isArguments(value) ||
        (isObjectLike(value) && isFunction(value.splice)))) {
      return !value.length;
    }
    return !keys(value).length;
  }
  
  module.exports = isEmpty;