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42 lines
1.0 KiB
42 lines
1.0 KiB
var toInteger = require('./toInteger'); |
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/** Error message constants. */ |
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var FUNC_ERROR_TEXT = 'Expected a function'; |
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/** |
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* The opposite of `_.before`; this method creates a function that invokes |
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* `func` once it's called `n` or more times. |
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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 {number} n The number of calls before `func` is invoked. |
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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 saves = ['profile', 'settings']; |
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* |
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* var done = _.after(saves.length, function() { |
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* console.log('done saving!'); |
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* }); |
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* |
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* _.forEach(saves, function(type) { |
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* asyncSave({ 'type': type, 'complete': done }); |
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* }); |
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* // => Logs 'done saving!' after the two async saves have completed. |
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*/ |
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function after(n, func) { |
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if (typeof func != 'function') { |
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throw new TypeError(FUNC_ERROR_TEXT); |
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} |
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n = toInteger(n); |
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return function() { |
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if (--n < 1) { |
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return func.apply(this, arguments); |
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} |
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}; |
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} |
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module.exports = after;
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