| var toString = require('./toString'); | |
| /** Used to generate unique IDs. */ | |
| var idCounter = 0; | |
| /** | |
| * Generates a unique ID. If `prefix` is given, the ID is appended to it. | |
| * | |
| * @static | |
| * @since 0.1.0 | |
| * @memberOf _ | |
| * @category Util | |
| * @param {string} [prefix=''] The value to prefix the ID with. | |
| * @returns {string} Returns the unique ID. | |
| * @example | |
| * | |
| * _.uniqueId('contact_'); | |
| * // => 'contact_104' | |
| * | |
| * _.uniqueId(); | |
| * // => '105' | |
| */ | |
| function uniqueId(prefix) { | |
| var id = ++idCounter; | |
| return toString(prefix) + id; | |
| } | |
| module.exports = uniqueId; |