236 lines
7.8 KiB
HTML
236 lines
7.8 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=utf-8">
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<title>Adding new object members during parsing</title>
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<style type="text/css">
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/*margin and padding on body element
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can introduce errors in determining
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element position and are not recommended;
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we turn them off as a foundation for YUI
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CSS treatments. */
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body {
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margin:0;
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padding:0;
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}
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</style>
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<link rel="stylesheet" type="text/css" href="../../build/fonts/fonts-min.css" />
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<script type="text/javascript" src="../../build/yahoo-dom-event/yahoo-dom-event.js"></script>
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<script type="text/javascript" src="../../build/connection/connection-min.js"></script>
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<script type="text/javascript" src="../../build/json/json-min.js"></script>
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<!--begin custom header content for this example-->
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<style type="text/css">
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#demo table {
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border: 3px solid #89d;
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border-collapse: collapse;
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}
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#demo caption {
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margin: 3px 0;
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font-weight: bold;
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color: #333;
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margin: 1em 0 1ex;
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}
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#demo table th {
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background: #89d;
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color: #fff;
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padding: 1ex 1em;
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}
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#demo table td {
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background: #fff;
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border: 1px solid #ddd;
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padding: .5ex 1ex;
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}
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</style>
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<!--end custom header content for this example-->
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</head>
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<body class="yui-skin-sam">
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<h1>Adding new object members during parsing</h1>
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<div class="exampleIntro">
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<p>This example shows how to use the <code>reviver</code> parameter in <code>JSON.parse</code> to add new object members and format existing members during the parsing phase.</p>
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</div>
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<!--BEGIN SOURCE CODE FOR EXAMPLE =============================== -->
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<div id="demo">
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<p>Choose a currency, then get the data</p>
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<select id="currencies">
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<option value="ARS">Argentine Peso</option>
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<option value="AUD">Australian Dollar</option>
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<option value="BRL">Brazilian Real</option>
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<option value="GBP">British Pound</option>
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<option value="CAD">Canadian Dollar</option>
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<option value="CNY">Chinese Yuan</option>
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<option value="COP">Colombian Peso</option>
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<option value="HRK">Croatian Kuna</option>
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<option value="CZK">Czech Koruna</option>
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<option value="DKK">Danish Krone</option>
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<option value="EEK">Estonian Kroon</option>
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<option value="EUR">Euro</option>
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<option value="HKD">Hong Kong Dollar</option>
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<option value="HUF">Hungarian Forint</option>
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<option value="ISK">Iceland Krona</option>
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<option value="INR">Indian Rupee</option>
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<option value="JPY">Japanese Yen</option>
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<option value="KRW">Korean Won</option>
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<option value="LVL">Latvian Lat</option>
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<option value="LTL">Lithuanian Lita</option>
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<option value="MYR">Malaysian Ringgit</option>
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<option value="MXN">Mexican Peso</option>
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<option value="NZD">New Zealand Dollar</option>
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<option value="NOK">Norwegian Krone</option>
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<option value="PHP">Philippine Peso</option>
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<option value="PLN">Polish Zloty</option>
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<option value="RUB">Russian Rouble</option>
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<option value="SGD">Singapore Dollar</option>
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<option value="SKK">Slovak Koruna</option>
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<option value="ZAR">South African Rand</option>
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<option value="LKR">Sri Lanka Rupee</option>
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<option value="SEK">Swedish Krona</option>
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<option value="TRY">Turkey Lira</option>
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<option value="USD" selected="selected">U.S. Dollar</option>
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<option value="CHF">Swiss Franc</option>
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<option value="TWD">Taiwan Dollar</option>
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<option value="THB">Thai Baht</option>
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</select>
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<input type="button" id="demo_go" value="Get Data">
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<table cellspacing="0">
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<caption>Inventory</caption>
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<thead>
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<tr>
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<th>SKU</th>
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<th>Item</th>
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<th>Price (USD)</th>
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<th>Price (<span>USD</span>)</th>
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</tr>
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</thead>
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<tbody>
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<tr><td colspan="4">Click <em>Get Data</em></td></tr>
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</tbody>
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</table>
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</div>
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<script type="text/javascript">
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YAHOO.util.Event.onDOMReady(function () {
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// Set up some shortcuts
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var JSON = YAHOO.lang.JSON,
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Dom = YAHOO.util.Dom,
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Event = YAHOO.util.Event,
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Demo;
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// To avoid a Safari issue with JSON reviver adding properties
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JSON.useNativeParse = false;
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Demo = YAHOO.namespace('demo').JSONReviver = {
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rates : {"USD":1,"EUR":0.6661,"GBP":0.5207,"AUD":1.1225,"BRL":1.609,"NZD":1.4198,"CAD":1.0667,"CHF":1.0792,"CNY":6.8587 ,"DKK":4.9702,"HKD":7.8064,"INR":42.0168,"JPY":109.8901,"KRW":1000,"LKR":107.5269,"MXN":10.1317,"MYR" :3.3167,"NOK":5.3277,"SEK":6.2617,"SGD":1.4073,"THB":33.7838,"TWD":31.1526,"VEF":2.1445,"ZAR":7.6923 ,"BGN":1.3028,"CZK":16.0514,"EEK":10.4275,"HUF":158.7302,"LTL":2.2999,"LVL":0.4692,"PLN":2.1758,"RON" :2.3804,"SKK":20.2429,"ISK":4.8008,"HRK":81.3008,"RUB":24.3309,"TRY":1.1811,"PHP":44.2478,"COP":2000 ,"ARS":3.1289},
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currency : 'USD',
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formatCurrency : function (amt) {
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amt += amt % 1 ? "0" : ".00";
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return amt.substr(0,amt.indexOf('.')+3);
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},
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convert : function (k,v) {
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// 'this' will refer to the object containing the key:value pair,
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// so this will add a new object member while leaving the original
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// in tact (but formatted to two decimal places). If the original
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// is not needed, just return the converted value.
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if (k === 'Price') {
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var x = Math.round(v * Demo.rates[Demo.currency] * 100) / 100;
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this.convertedPrice = Demo.formatCurrency(x); // added to item
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return Demo.formatCurrency(v); // assigned to item.Price
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}
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return v;
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},
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updateTable : function (inventory) {
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var demo = Dom.get('demo'),
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tbl = demo.getElementsByTagName('table')[0],
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tbody = tbl.getElementsByTagName('tbody')[0],
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col_header = tbl.getElementsByTagName('span')[0],
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tmp = document.createElement('div'),
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html = ["<table><tbody>"],i,j = 1,l,item;
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// Update the column header
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col_header.innerHTML = Demo.currency;
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if (inventory) {
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for (i = 0, l = inventory.length; i < l; ++i) {
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item = inventory[i];
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html[j++] = '<tr><td>';
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html[j++] = item.SKU;
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html[j++] = '</td><td>';
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html[j++] = item.Item;
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html[j++] = '</td><td>';
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html[j++] = item.Price;
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html[j++] = '</td><td>';
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html[j++] = item.convertedPrice;
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html[j++] = '</td></tr>';
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}
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} else {
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html[j++] = '<tr><td colspan="4">No Inventory data</td></tr>';
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}
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html[j] = "</tbody></table>";
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tmp.innerHTML = html.join('');
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tbl.replaceChild(tmp.getElementsByTagName('tbody')[0], tbody);
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}
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};
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Event.on('demo_go','click', function (e) {
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var self = this, // Cache this for the async callback closure
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sel = Dom.get('currencies'); // Store the requested currency
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// Disable the button temporarily
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this.disabled = true;
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// Store the requested currency
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Demo.currency = sel.value;
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YAHOO.util.Connect.asyncRequest('GET','assets/data.php',{
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timeout : 3000,
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success : function (res) {
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var inventory;
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try {
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inventory = JSON.parse(res.responseText,Demo.convert);
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Demo.updateTable(inventory);
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}
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catch(e) {
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alert("Error getting inventory data");
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}
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finally {
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self.disabled = false;
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}
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},
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failure : function () {
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alert("Error getting inventory data");
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}
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});
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});
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});
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</script>
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</script>
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<!--END SOURCE CODE FOR EXAMPLE =============================== -->
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</body>
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</html>
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