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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;
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