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							- /**
 
-  * @param {string} path
 
-  * @returns {Boolean}
 
-  */
 
- export function isExternal(path) {
 
-   return /^(https?:|mailto:|tel:)/.test(path)
 
- }
 
- /**
 
-  * @param {string} str
 
-  * @returns {Boolean}
 
-  */
 
- export function validUsername(str) {
 
-   const valid_map = ['admin', 'editor']
 
-   return valid_map.indexOf(str.trim()) >= 0
 
- }
 
- /**
 
-  * @param {string} url
 
-  * @returns {Boolean}
 
-  */
 
- export function validURL(url) {
 
-   const reg = /^(https?|ftp):\/\/([a-zA-Z0-9.-]+(:[a-zA-Z0-9.&%$-]+)*@)*((25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9][0-9]?)(\.(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])){3}|([a-zA-Z0-9-]+\.)*[a-zA-Z0-9-]+\.(com|edu|gov|int|mil|net|org|biz|arpa|info|name|pro|aero|coop|museum|[a-zA-Z]{2}))(:[0-9]+)*(\/($|[a-zA-Z0-9.,?'\\+&%$#=~_-]+))*$/
 
-   return reg.test(url)
 
- }
 
- /**
 
-  * @param {string} str
 
-  * @returns {Boolean}
 
-  */
 
- export function validLowerCase(str) {
 
-   const reg = /^[a-z]+$/
 
-   return reg.test(str)
 
- }
 
- /**
 
-  * @param {string} str
 
-  * @returns {Boolean}
 
-  */
 
- export function validUpperCase(str) {
 
-   const reg = /^[A-Z]+$/
 
-   return reg.test(str)
 
- }
 
- /**
 
-  * @param {string} str
 
-  * @returns {Boolean}
 
-  */
 
- export function validAlphabets(str) {
 
-   const reg = /^[A-Za-z]+$/
 
-   return reg.test(str)
 
- }
 
- /**
 
-  * @param {string} email
 
-  * @returns {Boolean}
 
-  */
 
- export function validEmail(email) {
 
-   const reg = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/
 
-   return reg.test(email)
 
- }
 
- /**
 
-  * @param {string} str
 
-  * @returns {Boolean}
 
-  */
 
- export function isString(str) {
 
-   if (typeof str === 'string' || str instanceof String) {
 
-     return true
 
-   }
 
-   return false
 
- }
 
- /**
 
-  * @param {Array} arg
 
-  * @returns {Boolean}
 
-  */
 
- export function isArray(arg) {
 
-   if (typeof Array.isArray === 'undefined') {
 
-     return Object.prototype.toString.call(arg) === '[object Array]'
 
-   }
 
-   return Array.isArray(arg)
 
- }
 
 
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