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



官网地址：http://taffydb.com/