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33 lines
1.0 KiB
JavaScript
33 lines
1.0 KiB
JavaScript
/**
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* lodash 3.0.0 (Custom Build) <https://lodash.com/>
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* Build: `lodash modern modularize exports="npm" -o ./`
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* Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/>
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* Based on Underscore.js 1.7.0 <http://underscorejs.org/LICENSE>
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* Copyright 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
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* Available under MIT license <https://lodash.com/license>
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*/
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var before = require('lodash.before');
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/**
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* Creates a function that is restricted to invoking `func` once. Repeat calls
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* to the function return the value of the first call. The `func` is invoked
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* with the `this` binding and arguments of the created function.
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*
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* @static
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* @memberOf _
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* @category Function
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* @param {Function} func The function to restrict.
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* @returns {Function} Returns the new restricted function.
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* @example
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*
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* var initialize = _.once(createApplication);
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* initialize();
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* initialize();
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* // `initialize` invokes `createApplication` once
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*/
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function once(func) {
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return before(func, 2);
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}
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module.exports = once;
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