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25 行
665 B
25 行
665 B
var before = require('./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 invocation. The `func` is
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* invoked 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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* @since 0.1.0
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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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* // => `createApplication` is invoked once
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*/
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function once(func) {
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return before(2, func);
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}
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module.exports = once;
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