locutus/php/var/gettype.js

Locutus other languages' standard libraries to JavaScript for fun and educational purposes

'use strict';

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

module.exports = function gettype(mixedVar) {
  //  discuss at: https://locutus.io/php/gettype/
  // original by: Paulo Freitas
  // improved by: Kevin van Zonneveld (https://kvz.io)
  // improved by: Douglas Crockford (https://javascript.crockford.com)
  // improved by: Brett Zamir (https://brett-zamir.me)
  //    input by: KELAN
  //      note 1: 1.0 is simplified to 1 before it can be accessed by the function, this makes
  //      note 1: it different from the PHP implementation. We can't fix this unfortunately.
  //   example 1: gettype(1)
  //   returns 1: 'integer'
  //   example 2: gettype(undefined)
  //   returns 2: 'undefined'
  //   example 3: gettype({0: 'Kevin van Zonneveld'})
  //   returns 3: 'object'
  //   example 4: gettype('foo')
  //   returns 4: 'string'
  //   example 5: gettype({0: function () {return false;}})
  //   returns 5: 'object'
  //   example 6: gettype({0: 'test', length: 1, splice: function () {}})
  //   returns 6: 'object'
  //   example 7: gettype(['test'])
  //   returns 7: 'array'

  var isFloat = require('../var/is_float');

  var s = typeof mixedVar === 'undefined' ? 'undefined' : _typeof(mixedVar);
  var name;
  var _getFuncName = function _getFuncName(fn) {
    var name = /\W*function\s+([\w$]+)\s*\(/.exec(fn);
    if (!name) {
      return '(Anonymous)';
    }
    return name[1];
  };

  if (s === 'object') {
    if (mixedVar !== null) {
      // From: https://javascript.crockford.com/remedial.html
      // @todo: Break up this lengthy if statement
      if (typeof mixedVar.length === 'number' && !mixedVar.propertyIsEnumerable('length') && typeof mixedVar.splice === 'function') {
        s = 'array';
      } else if (mixedVar.constructor && _getFuncName(mixedVar.constructor)) {
        name = _getFuncName(mixedVar.constructor);
        if (name === 'Date') {
          // not in PHP
          s = 'date';
        } else if (name === 'RegExp') {
          // not in PHP
          s = 'regexp';
        } else if (name === 'LOCUTUS_Resource') {
          // Check against our own resource constructor
          s = 'resource';
        }
      }
    } else {
      s = 'null';
    }
  } else if (s === 'number') {
    s = isFloat(mixedVar) ? 'double' : 'integer';
  }

  return s;
};
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