| var before = require('./before'); |
| |
| /** |
| * Creates a function that is restricted to invoking `func` once. Repeat calls |
| * to the function return the value of the first call. The `func` is invoked |
| * with the `this` binding and arguments of the created function. |
| * |
| * @static |
| * @memberOf _ |
| * @category Function |
| * @param {Function} func The function to restrict. |
| * @returns {Function} Returns the new restricted function. |
| * @example |
| * |
| * var initialize = _.once(createApplication); |
| * initialize(); |
| * initialize(); |
| * // `initialize` invokes `createApplication` once |
| */ |
| function once(func) { |
| return before(2, func); |
| } |
| |
| module.exports = once; |
