35 lines
1.1 KiB
JavaScript
35 lines
1.1 KiB
JavaScript
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/* $This file is distributed under the terms of the license in /doc/license.txt$ */
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var vitro;
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if (!vitro) {
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vitro = {};
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}
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/* From "JavaScript: The Definitive Guide," 5th edition, by David Flanagan
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* Copyright 2006 O'Reilly Media, Inc.
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* ISBN 978-0-596-10199-2
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*/
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vitro.utils = {
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// Borrow methods from one class for use by another.
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// The arguments should be the constructor functions for the classes.
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// Methods of built-in types such as Object, Array, Date, and RegExp are
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// not enumerable and cannot be borrowed from with this method.
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borrowPrototypeMethods: function(borrowFrom, addTo) {
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var from = borrowFrom.prototype; // prototype object to borrow from
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var to = addTo.prototype; // prototype object to extend
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for (m in from) { // loop through all properties of the prototype
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if (typeof from[m] != "function") { continue; } // ignore non-functions
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to[m] = from[m];
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}
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},
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borrowMethods: function(borrowFrom, addTo) {
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for (m in borrowFrom) { // loop through all properties of the prototype
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if (typeof borrowFrom[m] != "function") { continue; } // ignore non-functions
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addTo[m] = borrowFrom[m];
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}
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}
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};
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