# Yahoo! UI Library

### dump 3.0.0

Yahoo! UI Library > dump > dump.js (source view)
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    /**
     * Returns a simple string representation of the object or array.
     * Other types of objects will be returned unprocessed.  Arrays
     * are expected to be indexed.  Use object notation for
     * associative arrays.
     *
     * If included, the dump method is added to the YUI instance.
     *
     * @module dump
     */

        var L=Y.Lang, OBJ='{...}', FUN='f(){...}', COMMA=', ', ARROW=' => ',

        /**
         * The following methods are added to the YUI instance
         * @class YUI~dump
         */

        /**
         * Returns a simple string representation of the object or array.
         * Other types of objects will be returned unprocessed.  Arrays
         * are expected to be indexed.  Use object notation for
         * associative arrays.
         *
         * @TODO dumping a window is causing an unhandled exception in
         * FireFox.
         *
         * This method is in the 'dump' module, which is not bundled with
         * the core YUI object
         *
         * @method dump
         * @param o {object} The object to dump
         * @param d {int} How deep to recurse child objects, default 3
         * @return {string} the dump result
         */
        dump = function(o, d) {
            var i, len, s = [], type = L.type(o);

            // Cast non-objects to string
            // Skip dates because the std toString is what we want
            // Skip HTMLElement-like objects because trying to dump
            // an element will cause an unhandled exception in FF 2.x
            if (!L.isObject(o)) {
                return o + "";
            } else if (type == "date") {
                return o;
            } else if (o.nodeType && o.tagName) {
                return o.tagName + '#' + o.id;
            } else if (o.document && o.navigator) {
                return 'window';
            } else if (o.location && o.body) {
                return 'document';
            } else if (type == "function") {
                return FUN;
            }

            // dig into child objects the depth specifed. Default 3
            d = (L.isNumber(d)) ? d : 3;

            // arrays [1, 2, 3]
            if (type == "array") {
                s.push("[");
                for (i=0,len=o.length;i<len;i=i+1) {
                    if (L.isObject(o[i])) {
                        s.push((d > 0) ? L.dump(o[i], d-1) : OBJ);
                    } else {
                        s.push(o[i]);
                    }
                    s.push(COMMA);
                }
                if (s.length > 1) {
                    s.pop();
                }
                s.push("]");
            // regexp /foo/
            } else if (type == "regexp") {
                s.push(o.toString());
            // objects {k1 => v1, k2 => v2}
            } else {
                s.push("{");
                for (i in o) {
                    if (o.hasOwnProperty(i)) {
                        try {
                            s.push(i + ARROW);
                            if (L.isObject(o[i])) {
                                s.push((d > 0) ? L.dump(o[i], d-1) : OBJ);
                            } else {
                                s.push(o[i]);
                            }
                            s.push(COMMA);
                        } catch(e) {
                            s.push('Error: ' + e.message);
                        }
                    }
                }
                if (s.length > 1) {
                    s.pop();
                }
                s.push("}");
            }

            return s.join("");
        };

        Y.dump = dump;
        L.dump = dump;

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