TaffyDB简介

这是昨天看到的运行在javascript中简小数据库,相当于数组集合,也提供一些操作数据的方法,主要用来存储网页运行中的一些数据,这是我的理解。下面就来简单看一下吧。

1、特点:

小文件大小,查询速度极快

强大的以JavaScript为中心的数据选择引擎

数据库启发的功能,如计数,更新和插入

强大的跨浏览器支持

轻松扩展自己的功能

兼容任何DOM库(jQuery,YUI,Dojo等)

与服务器端JS兼容

2、TaffyDB 增删改查

//创建并填充数据
var friends = TAFFY([
	{"id":1,"gender":"M","first":"John","last":"Smith","city":"Seattle, WA","status":"Active"},
	{"id":2,"gender":"F","first":"Kelly","last":"Ruth","city":"Dallas, TX","status":"Active"},
	{"id":3,"gender":"M","first":"Jeff","last":"Stevenson","city":"Washington, D.C.","status":"Active"},
	{"id":4,"gender":"F","first":"Jennifer","last":"Gill","city":"Seattle, WA","status":"Active"}	
]);
//查找,注意得到的是一个TaffyDB对象
// Find all the friends in Seattle friends({city:"Seattle, WA"}); // Find John Smith, by ID friends({id:1}); // Find John Smith, by Name friends({first:"John",last:"Smith"});
//得到数据,方法名应该很容易就看懂了吧
// Kelly's record var kelly = friends({id:2}).first(); // Kelly's last name var kellyslastname = kelly.last; // Get an array of record ids var cities = friends().select("id"); // Get an array of distinct cities var cities = friends().distinct("city"); // Apply a function to all the male friends friends({gender:"M"}).each(function (r) { alert(r.name + "!"); });
//更新数据
// Move John Smith to Las Vegas friends({first:"John",last:"Smith"}).update({city:"Las Vegas, NV:"}); //删除数据 // Remove Jennifer Gill as a friend friends({id:4}).remove(); //插入数据 // insert a new friend friends.insert({"id":5,"gender":"F","first":"Jennifer","last":"Gill","city":"Seattle, WA","status":"Active"});

这是我在浏览器端截取的关于操作TaffyDB的方法


TaffyDB简介_第1张图片

官网地址:http://taffydb.com/

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