Belajar Komputer & Gadget

var indexedDB = window.indexedDB || window.webkitIndexedDB || window.mozIndexedDB || window.msIndexedDB; var IDBTransaction = window.IDBTransaction || window.webkitIDBTransaction || { READ_WRITE: "readwrite" };; var db; var transaction, objectStore; var request = indexedDB.open("IndexedDBname", 1);         request.onsuccess = function (evt) {        db = request.result;  var deleteindex = db.transaction(["indexdbtable"], "readwrite") .objectStore("indexdbtable")                 .delete(1); // example if you want to delete index no 1 deleteindex.onsuccess = function(event) { console.log("index 1 deleted" + "indexdbtable");  // log };  };

This is how to create  key range between the search term and the search term with a 'z' letter at the final. db . transaction ([ 'table' ], 'readonly' ) . objectStore ( 'table' ) . openCursor ( IDBKeyRange . bound ( searchTerm , searchTerm + '\uffff' ), // The important part, thank Velmont to point out 'prev' ) . onsuccess = function ( e ) { e || ( e = event ); var cursor = e . target . result ; if ( cursor ) { // console.log(cursor.value.column1 + ' = ' + cursor.value.column2); cursor . continue (); } }; If you need to order the result, so I defined a array before the transaction, then we call it when we loaded all data, like this: var result = []; db . transaction ([ 'table' ], 'readonly' ) . objectStore ( 'table' ) . openCursor ( IDBKeyRange . bound ( searchTerm , searchTerm + '\uffff' ), // The important ...

The  HTML5   IndexedDB  is still in the working draft stage and not fully implemented in major Internet browsers yet. Nevertheless, I tried to use its asynchronous API to develop a  Google Maps  application. It took me a little while to figure out how to update an existing record in the IndexedDB  database store. This can be done by opening a read-write cursor to the record to be updated. Then call the cursor  update  method to replace it with the new record. An example Javascript code snippet is shown below. try { var objDb; //the database to update var store = 'myStore' ; //the database store to update var key = 88; //the key of the existing record to update var newRec = 'hello world' ; //the new record var objStore = null ; var objTrans = null ; var objCursor = null ; var objKeyRange = null ;   //...etc...open the database....etc... //open a read-write transaction objTrans = objDb.transaction(store,...

<SCRIPT LANGUAGE= "JavaScript" > var theImages = new Array()          theImages[0] = 'iphone-FASTEST.jpg'        theImages[1] = 'apple-3gs-0.jpg'        theImages[2] = 'apple-iphone-3gs-2-0.JPG'        theImages[3] = 'iphone-accessibility.jpg'        theImages[4] = 'iphone-cutcopypaste.jpg'                     var j = 0 var p = theImages.length; var preBuffer = new Array()   for (i = 0; i < p; i++){ preBuffer[i] = new Image() preBuffer[i].src = theImages[i] } var whichImage = Math.round(Math.random()*(p-1));   function showImage(){ if (whichImage==0){ document.write( '<a href ="link.html"><img src="' +theImages[whichImage]+ '" border=0 width=452 height=181></a>'...