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botdev@18.222.57.238: ~ $
'use strict';

var has = require('has');
var regexExec = RegExp.prototype.exec;
var gOPD = Object.getOwnPropertyDescriptor;

var tryRegexExecCall = function tryRegexExec(value) {
	try {
		var lastIndex = value.lastIndex;
		value.lastIndex = 0;

		regexExec.call(value);
		return true;
	} catch (e) {
		return false;
	} finally {
		value.lastIndex = lastIndex;
	}
};
var toStr = Object.prototype.toString;
var regexClass = '[object RegExp]';
var hasToStringTag = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';

module.exports = function isRegex(value) {
	if (!value || typeof value !== 'object') {
		return false;
	}
	if (!hasToStringTag) {
		return toStr.call(value) === regexClass;
	}

	var descriptor = gOPD(value, 'lastIndex');
	var hasLastIndexDataProperty = descriptor && has(descriptor, 'value');
	if (!hasLastIndexDataProperty) {
		return false;
	}

	return tryRegexExecCall(value);
};

Filemanager

Name Type Size Permission Actions
.jscs.json File 4.04 KB 0644
.npmignore File 97 B 0644
.travis.yml File 4.66 KB 0644
CHANGELOG.md File 1.08 KB 0644
LICENSE File 1.06 KB 0644
Makefile File 3.74 KB 0644
README.md File 1.59 KB 0644
index.js File 918 B 0644
package.json File 1.79 KB 0644
test.js File 1.76 KB 0644