| 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; |
